TEC2647Z-2+PIR san berni

TEC Zoning Control System for Stand-Alone and BACnet® MS/TP Networked ApplicationsTechnical BulletinTEC2647Z-2, TEC2647Z-2+PIR,TEC2664Z-2

Code No. LIT-12011398Issued December 1, 2009Supersedes May 14, 2009

Document Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

System Overview and Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Initial Design Criteria Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Scalability and Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Local Zone Terminal Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Exception Areas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Bypass Damper Design Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Setup and Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

TEC2647Z-2 and TEC2647Z-2+PIR Zone Controller Operation Overview . . . . . . . . . . 11

Zone Controller User Interface Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Backlit LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Light-Emitting Diodes (LEDs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Passive Infrared (PIR) Onboard Occupancy Sensor (TEC2647Z-2+PIR Model) . . . . . . . . 12

Status Display Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

PIR Onboard Occupancy Sensor Operation (TEC2647Z-2+PIR Model) . . . . . . . . . . . . . . . 12

PIR Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Standby Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

TEC2664Z-2 Rooftop Controller Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Rooftop Controller User Interface Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Light-Emitting Diodes (LEDs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Manual Scroll Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Main User Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Configuring the TEC2647Z-2 or TEC2647Z-2+PIR Zone Controller. . . . . . . . . . . . . . . . 15

1TEC Zoning Control System for Stand-Alone and BACnet® MS/TP NetworkedApplications Technical Bulletin

Monitoring Inputs BI2 and UI3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

TEC2647Z-2 and TEC2647Z-2+PIR Zone Controller Operation and Strategy. . . . . . . . 21

PIR Onboard Occupancy Sensor (TEC2647Z-2+PIR Model) . . . . . . . . . . . . . . . . . . . . . . . 22

Demand-Based Heating and Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Overrides and Zone Controller User Interface Lockouts . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Zone Setpoint Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Heating and Cooling Weight Zone Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Minimum, Maximum, and Heat Flow Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Minimum Position Adjustment (Min Pos Parameter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Maximum Position Adjustment (Max Pos Parameter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Maximum Heat Flow Adjustment (MaxHTPos Parameter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Balancing the Minimum, Maximum, and Heat Flow Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Terminal Reheat Lockout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Configuring the TEC2664Z-2 Rooftop Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Configuring Input DI1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

TEC2664Z-2 Rooftop Controller Operation and Strategy. . . . . . . . . . . . . . . . . . . . . . . . 36

Data Exchange between the Rooftop Controller and the Zones . . . . . . . . . . . . . . . . . . . . . 36

Occupancy and Overrides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Rooftop Controller User Interface Lockouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Rooftop Controller Heating and Cooling Supply Air Temperature Lockouts . . . . . . . . . . . . 38

Rooftop Controller Heating and Cooling Outside Air Temperature Lockouts . . . . . . . . . . . 39

Seasonal Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Bypass Damper Control and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

TEC2647Z-2 and TEC2647Z-2+PIR Zone Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

PIR Occupancy Sensor Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

PIR Occupancy Sensor Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

TEC2664Z-2 Rooftop Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

TEC2664Z-2 Rooftop Controller Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Main User Menu Access Modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Sequence of Auto Status Display Scrolling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

TEC Zoning Control System for Stand-Alone and BACnet® MS/TP Networked Applications Technical Bulletin

2

Sequence of Manual Status Display Scrolling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

System Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Proper Commissioning of the Zone Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Proper Commissioning of the Rooftop Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

System Operation Checklists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

MS/TP Bus Objects When Networked with a Supervisory Controller. . . . . . . . . . . 59

TEC2647Z-2 and TEC2647Z-2+PIR Zone Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

TEC2664Z-2 Rooftop Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

MS/TP Device Mapping into an NAE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Adding a Zone Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Adding a Rooftop Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Adding Point Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Notes, Tips, and Things to Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Multiple 24 VAC Zone Controller Transformers versus a Single 24 VAC Zone Controller Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Critical Point Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Balancing and Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Occupancy Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Occupancy Schedule. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

NAE Engineering View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Troubleshooting a TEC Zoning Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . 70


3


4

art Number397

75

4-9890-676

4-9890-684

TEC Zoning Control System for Stand-Alone and BACnet® MS/TP Networked ApplicationsTechnical Bulletin

Document IntroductionThis document describes how to configure and commission a TEC Zoning Control System for stand-alone and BACnet® Master-Slave/Token-Passing (MS/TP) networked applications, including how to:

• map devices into a Network Automation Engine (NAE)

• add a zone controller and rooftop controller on a Metasys® network

• map the required zone controller and rooftop controller point objects

• operate the zone controller and rooftop controller user interface keys

• configure the zone controller and rooftop controller parameters via the Installer Configuration Menu

• determine the sequence of operation of the zones

• initiate the rooftop controller Main User Menu

• determine the rooftop controller sequence of auto status display scrolling

• initiate the rooftop controller manual scroll display

• troubleshoot a TEC Zoning Control System

This document neither describes how to locate or install the TEC Zoning Control System, nor how to wire the system. Refer to the appropriate zone controller and rooftop controller Installation Instructions listed in Table 1 for more information on these topics.

Related DocumentationSee Table 1 to locate information in related documentation. Table 1: TEC Zoning Control System Related Documentation (Part 1 of 2)For Information On See Document LIT or PApplications, Features, and Benefits of the TEC Zoning Control System

TEC Zoning Control System for Stand-Alone and BACnet MS/TP Networked Applications Product Bulletin

LIT-12011

Applications, Features, and Benefits of the TEC Zoning Control System

TEC Zoning Control System for Stand-Alone and BACnet MS/TP Networked Applications Catalog Page

LIT-19004

Locating, Mounting, and Wiring TEC2647Z-2 and TEC2647Z-2+PIR Zone Controllers

TEC2647Z-2 and TEC2647Z-2+PIR BACnet MS/TP Zone Controllers for Stand-Alone and Networked Zoning Systems Installation Instructions

Part No. 2

Locating, Mounting, and Wiring TEC2664Z-2 Rooftop Controllers

TEC2664Z-2 BACnet MS/TP Rooftop Controller for Stand-Alone and Networked Zoning Systems Installation Instructions

Part No. 2


5

4-9890-870

399

404

art Number

Bus

Terminator

FIG

:typc

l_zn

ng_s

ystm

Product Overview

The TEC Zoning Control System features a fully scalable network architecture using BACnet MS/TP communication capability that operates with a supervisory controller, or it can operate as a stand-alone system. This cost-effective zoning control system provides efficient space temperature control for constant volume, pressure-dependent systems in multi-zone heating and cooling applications.

The TEC Zoning Control System uses standard BACnet objects for automatic self-binding zone-controller-to-rooftop-controller configuration, communicating in a peer-to-peer manner. Pre-configured sequences reduce the need for programming and eliminate flash downloading. Plain text menus, backlit display, and multiple interface keys make setup and operation quick and easy.

Mounting and Wiring a TEC-7-PIR Occupancy Sensor Zone Controller Cover

PIR Accessory Cover Installation Instructions

Part No. 2

Particular Options Specified in the BACnet Standard and Implemented in the TEC2647Z-2 or TEC2647Z-2+PIR Zone Controller

Zoning System TEC2647Z-2 and TEC2647Z-2+PIR Zone Controllers Protocol Implementation Conformance Statement Technical Bulletin

LIT-12011

Particular Options Specified in the BACnet Standard and Implemented in the TEC2664Z-2 Rooftop Controller

Zoning System TEC2664Z-2 Rooftop Controller Protocol Implementation Conformance Statement Technical Bulletin

LIT-12011

Table 1: TEC Zoning Control System Related Documentation (Part 2 of 2)For Information On See Document LIT or P

Figure 1: Typical TEC Zoning Control System Installed on a Single MS/TP

ZoneDamper

ZoneDamperZone

Damper

ZoneController

ZoneController

RS485 End-of-Line(MS-BACEOL-0)

MS/TPBus

Rooftop Unit

ReturnSupplyBypassDamper

ReturnAirflow

BypassAirflow

Mixed Airflow

•

•• •

RooftopController

ZoneController

MS/TPBus


6

Figure 1 illustrates a typical TEC Zoning Control System installed on a single MS/TP Bus. This installation consists of multiple TEC2647Z-2 or TEC2647Z-2+PIR (onboard occupancy sensor) Zone Controllers, each controlling a single zone damper; and a TEC2664Z-2 Rooftop Controller controlling a rooftop unit. Optionally, the MS/TP Bus can be wired to a supervisory controller to provide centralized monitoring and control of the system.

System Overview and ArchitectureThe TEC Zoning Control System is comprised of two terminal equipment controller types, including:

• TEC2647Z-2 or TEC2647Z-2+PIR Zone Controller

• TEC2664Z-2 Rooftop Controller

Combined, this system delivers a simple yet efficient way to operate and control pressure-dependent Variable Air Volume (VAV) zones with rooftop units. System control implementation is based on demand. The system is designed to work with small- to medium-sized staged heating and cooling rooftop unit equipment (2 to 20 tons typical).

A local BACnet MS/TP Bus between all devices provides effective communication and smooth data exchange of all required information between the zone controllers and the rooftop controllers for proper system operation. Integration into any BACnet supervision system is seamless.

The zone controller and rooftop controller feature a backlit Liquid Crystal Display (LCD) with dedicated function menu buttons for simple user operation. Accurate temperature control is achieved through a unique, Proportional-Integral (PI) time-proportioning algorithm that virtually eliminates temperature offset associated with traditional, differential-based thermostats.

The zone controller is specifically designed for local pressure-dependent VAV zone control within Johnson Controls zoning system product family. The primary damper output uses an off-the-shelf, standard 0 to 10 VDC VAV actuator for control.

IMPORTANT: The TEC Zoning Control System is intended to provide an input to equipment under normal operating conditions. Where failure or malfunction of the zoning control system could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the zoning control system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the zoning control system.


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The zone controller is available with or without a factory-installed occupancy sensor cover. The zone controller is also compatible with an accessory Johnson Controls TEC-7-PIR Occupancy Sensor Cover. A zone controller equipped with the occupancy sensor cover provides advanced active occupancy logic that automatically switches occupancy levels from occupied to standby as required, when motion is sensed. This feature results in incremental energy savings during scheduled occupied periods when the space is unoccupied, without sacrificing occupant comfort.

The rooftop controller is specifically designed for equipment control, based on the demands of the zone. The rooftop controller provides single- or multi-stage control of heating and cooling equipment, such as rooftop and self-contained units used in zoning control systems. The rooftop controller includes an extra digital input that monitors filter status, or it can be used as a general-purpose service indicator. A Single-Pole, Single-Throw (SPST) auxiliary contact controls lighting, or it can be used to disable the rooftop controller economizer function during unoccupied periods. Also included is a discharge air sensor input. Proportional input and output static pressure logic is integrated into the rooftop controller design, to provide bypass damper control.

The TEC Zoning Control System requires a minimum of a single zone controller and a single rooftop controller to operate properly. A typical application includes multiple zone controllers addressed to a single rooftop controller.

The following is required for proper zone controller operation, and must be provided separately:

• 24 VAC power supply, dedicated to the zone(s)

• analog 0 to 10 VDC pressure-dependent electric actuator

• terminal reheat (if required by the design)

• proper wiring of all components, per the installation instructions

• proper network wires fed for each device

The following is required for proper rooftop controller operation, and must be provided separately:

• 24 VAC power supply, typically taken directly from the rooftop unit power supply (C and RC)

• outdoor air sensor

• supply air duct sensor

• return air duct sensor

• 0 to 5 VDC static pressure sensor/transducer

• analog 0 to 10 VDC bypass damper actuator (spring return or non-spring return)

• proper wiring of all components, per the installation instructions

• proper network wiring


8

Example: A typical installation may include three rooftop controllers, controlling 28 zones, for a total of 31 nodes (individual Comm addresses). Rooftop controller No. 1 would have 9 zones under its command, rooftop controller No. 2 would also have 9 zones under its command, and rooftop controller No. 3 would have 10 zones under its command.

Initial Design Criteria ConsiderationsThe designer and installer of the TEC Zoning Control System must:

• size the installed equipment for the properly calculated heating and/or cooling peak loads. Oversizing the installed capacity more than what is required is not advantageous, as it simply leads to short cycling of the equipment during small load periods.

• properly size and lay out the duct work (including the bypass damper) in accordance with local, national, and regional regulations. The TEC Zoning Control System is a low static pressure system, and it must be designed so the failure of the bypass damper subsystem does not cause failure of the ducts.

• properly size the capacity of the zone versus its true requirements. Square footage calculations can cause the installed total deliverable load to be insufficient for the actual use of an area (for example, a conference room, computer room, or a cafeteria).

Although the TEC Zoning Control System does not correct for a wrong initial mechanical layout and associated load calculations, the control system does dramatically help deliver the load required by voting zones. The control system accomplishes the delivery by appropriately distributing the total available capacity of the installed equipment to the required voting zones. If the equipment is undersized for the peak load, the control system distributes the available capacity according to the priorities requested, to improve the comfort level of the majority of zones.

Proper planning and design plays a critical role in getting an installation up and running faster, and with fewer service calls during the initial occupancy period.

Scalability and LimitationsThe TEC Zoning Control System is fully scalable in terms of the number of zone controllers and rooftop controllers used on the same MS/TP Communications Bus. For more details on wiring to the MS/TP Bus, refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034).

Local Zone Terminal ReheatThe need for terminal reheat depends on the specific application. As a general rule, including terminal reheat in a VAV system always results in better occupancy comfort; however, it may not be practical from a cost standpoint or for regional load requirements. System designs vary widely from north to south and east to west because of regional peak load requirements.


9

In colder climates, VAV system heating operation without terminal reheat typically results in colder walls on the outer perimeter of the zone. Although the dry bulb temperature of the zone is well maintained, occupants may be uncomfortable simply because of the lower outer wall temperature. In addition, heating delivery from the ceiling in outside zones is not as efficient as heating delivery directly where the losses occur, such as when a perimeter electric baseboard or a perimeter hydronic baseboard is used.

In regions where the heating load is low and only required for a short period of the year, a properly sized VAV system can deliver the required heating comfort without the use of terminal reheat. Ideally, the design of the ductwork and area diffusers should be the most efficient arrangement possible, with the heating delivery concentrated close to the outer walls of the zone.

In problematic situations where efficient heating delivery is an issue, fan powered VAV systems can reduce occupancy discomfort by providing a constant flow to the zones, to maximize heating delivery.

Exception AreasAn office installation typically requires that a single VAV system service multiple areas or zones. These areas are likely a mix of internal and external zones. Verify the requirements of each zone to determine a true total peak load before committing to a final VAV system design and size.

It may be necessary to intentionally oversize or undersize the VAV system to meet the daily load demands. The following are examples where oversizing may be required:

• areas with large windows that are exposed to the sun for long periods of time

• conference rooms

• cafeterias

• areas with vending machines

• areas with extra lighting

• areas with computers, photocopiers, and other electronic office equipment

Areas such as computer rooms, kitchens, or large meeting rooms may require an independent VAV system, and should not be included with other zones that are networked to the rooftop controller. Certain critical areas may call for cooling all year long and, based on the VAV system settings, could provide proper occupancy comfort for only a portion of the year. Knowing in advance the critical areas of the building, and designing for these zones appropriately, results in a more comfortable environment for all building occupants.


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Bypass Damper Design RulesA bypass damper is an airflow regulating device installed between the supply and return air ducts. The bypass damper automatically opens and bypasses the supply air normally delivered to the zone, directly from the supply to the return, as a result of a pressure rise when the VAV zone dampers close. The bypass damper is normally sized to pass at least 70 to 80% of the nominal airflow of the rooftop controller.

To determine if the bypass damper is sized properly, assume that all VAV zone dampers are closed to the minimum position. The bypass damper should be large enough to recirculate all of the airflow from the rooftop controller, minus the airflow set by the minimum positions at the zones.

Setup and Adjustments

TEC2647Z-2 and TEC2647Z-2+PIR Zone Controller Operation Overview

Zone Controller User Interface KeysThe zone controller user interface is comprised of three keys on the front cover (as illustrated in Figure 2). The function of each key is as follows:

• OVERRIDE key overrides the unoccupied mode to occupied at the local user interface for the specified TOccTime. (Define TOccTime by selecting the appropriate time period in the Installer Configuration Menu.)

Note: If the Lockout parameter is set to (2): Level 3 or (3): Level 4, then this OVERRIDE key is disabled.

Figure 2: Front Cover of Zone Controller(TEC2647Z-2+PIR Model Shown)

70.0ºFRoom TempBacklit, plain text

LCD is easy to readin any condition.

Three keys on the zone controllermake operation easy and intuitive.

LEDs indicatesystem activity.

FIG

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r

Passive Infrared (PIR)onboard occupancy sensor

saves energy usingstandby setpoints.


11

The OVERRIDE key also allows access to the Installer Configuration Menu. See Configuring the TEC2647Z-2 or TEC2647Z-2+PIR Zone Controller on page 15.

• UP/DOWN arrow keys change the configuration parameters and activate a setpoint adjustment.

Backlit LCD

The zone controller includes a two-line, eight-character backlit display. Low-level backlighting is present during normal operation and brightens when any user interface key is pressed. The backlight returns to low level when the zone controller is left unattended for 45 seconds.

Light-Emitting Diodes (LEDs)Two LEDs are included to show a call for heating or a call for cooling:

• The HEAT LED is on when heating or reheat is on.

• The COOL LED is on when cooling is on.

Passive Infrared (PIR) Onboard Occupancy Sensor (TEC2647Z-2+PIR Model)The PIR onboard occupancy sensor allows for automatic switching between fully adjustable occupied and standby temperature setpoints without user interaction. This feature results in incremental energy savings during scheduled occupied periods when the space is unoccupied.

Status Display Menu

The Status Display Menu appears during normal zone controller operation. This menu continuously scrolls through the following parameters:

• Room Temperature

• Occupancy Status (Occupied/Unoccupied/Standby/Override)

• Outside Temperature (Installation of an outside air temperature sensor allows the H lock and C lock parameters of the rooftop controller to discontinue heating or cooling operation in response to the outside air temperature. If an outside air temperature sensor is not installed, an ambiguous outside air temperature displays on the zone controller unless its MenuScro parameter is set to off.)

Note: An option is available within the Installer Configuration Menu to lock out the scrolling display and show only the Room Temperature parameter.

PIR Onboard Occupancy Sensor Operation (TEC2647Z-2+PIR Model)The zone controller provides advanced occupancy logic when equipped with a PIR occupancy sensor cover or a remote PIR occupancy sensor attached to BI1.

Note: Set the PIR Func parameter to on as described in Table 2 to enable the PIR occupancy sensing function.


12

The zone controller automatically switches occupancy levels from standby to occupied as required, when local motion is sensed.

Occupancy sensing is enabled only if a PIR occupancy sensor cover is installed on the zone controller, or if a remote input is configured as a remote PIR occupancy sensor (MotionNO or MotionNC) and the PIR Func parameter is set to on as described in Table 2.

PIR Diagnostic LEDs

The diagnostic LEDs within the zone controller brighten when motion is detected within the first 30 minutes after the unit is powered up. The diagnostic LEDs do not light up or brighten after the initial 30-minute powerup period.

Standby Setpoints

The standby setpoints have the same limitations and restrictions as the occupied and unoccupied setpoints. The standby setpoints reside between the corresponding occupied and unoccupied setpoint values.

TEC2664Z-2 Rooftop Controller Operation Overview

Rooftop Controller User Interface Keys

The TEC2664Z-2 Rooftop Controller user interface consists of five keys on the front cover (as illustrated in Figure 3). The function of each key is as follows:

• Use the YES/SCROLL key to:

- confirm display selections and to advance to the next display item

- stop the Auto Scroll Display from automatically scrolling and to manually scroll to the next parameter on the display

Note: When the rooftop controller is left unattended for 45 seconds, the rooftop controller display resumes scrolling.

70.0ºFRoom Temp

YES NO

Backlit, plain textLCD is easy to read

in any condition.

Five keys on the rooftop controllermake operation easy and intuitive.

LEDs indicatesystem activity.

FIG

:frnt

_vw

_rftp

_cnt

rlr

Figure 3: Front Cover of Rooftop Controller


13

• Use the NO key to decline a parameter change and to advance to the next display item.

• Use the MENU key to:

- access the Main User Menu or to exit the menu (See Main User Menu on page 15.)

- access the Installer Configuration Menu or to exit the menu (See Configuring the TEC2664Z-2 Rooftop Controller on page 32.)

• Use the UP/DOWN arrow keys to change the configuration parameters and to activate a setpoint adjustment.

Light-Emitting Diodes (LEDs)Three LEDs are included to indicate the fan status, and to show a call for heating or a call for cooling:

• The FAN LED is on when the fan is on.

• The HEAT LED is on when heating is on.

• The COOL LED is on when cooling is on.

Manual Scroll Display

To initiate the Manual Scroll Display, press the YES key repeatedly. The last item viewed remains on the display for 30 seconds before Auto Scroll Display resumes. The manual scroll sequence is as follows:

• Clock Status (Day/Time)

• System Mode (Off/Auto)

• Schedule Status (Occupied/Unoccupied/Override)

• Outside Temperature

• Alarms (Service/DAS Alrm/SetClock/Filter/Comm Lost)

• Current Zone Sequence (Off/Cool/Heat)

• Return Air Temp

• Discharge Air Temp

• Current Static Pressure

• Effective PI Heat

• Effective PI Cool

• Highest PI Heat Zone

• Highest PI Cool Zone


14

UP/DOWN arrow ements of 1; press nge the device

Main User MenuUse the Main User Menu to access and change the basic operating parameters of the rooftop controller. During normal rooftop controller operation, press the MENU key once to access the Main User Menu. This menu is most commonly used by the zone occupant and includes the following parameters:

• Schedule Override/Cancel Override

• System Mode

• Set Schedule

• Set Clock

The Main User Menu uses Auto Help. Auto Help appears automatically in the Main User Menu when programming activity pauses.

Configuring the TEC2647Z-2 or TEC2647Z-2+PIR Zone ControllerThe zone controller comes from the factory with default settings for all configurable parameters. The default settings are shown in Table 2. Access the Installer Configuration Menu on the zone controller to reconfigure the parameters.

To access the Installer Configuration Menu, press and hold the OVERRIDE key for approximately 8 seconds. Once the Installer Configuration Menu begins, release and press the OVERRIDE key to scroll through the parameters listed in Table 2. When the desired parameter appears, use the UP/DOWN arrow keys to choose the desired selection option. Then press and release the OVERRIDE key to continue scrolling through the parameters.

When the zone controller is in the Installer Configuration Menu and left unattended for approximately 8 seconds, the zone controller reverts to the Status Display Menu.

Monitoring Inputs BI2 and UI3BI2 provides voltage-free contact status via the supervisory controller only. Examples of monitoring include airflow proving and filter status.

The UI3 input provides temperature sensor monitoring via the supervisory controller.

Table 2: TEC2647Z-2 and TEC2647Z-2+PIR Zone Controller Installer Configuration Menu (Part 1 of 7)

Parameter Appearing on Display

Description and Default Selection Options

Zone MAC1 Sets a unique device address for the zone controller on the MS/TP network.Default: 255

Range: 004 to 127Note: When setting the device address, press the

keys to change the device address in incrand hold the UP/DOWN arrow keys to chaaddress in increments of 10.


15

a routine to get the nd imports those e Get From rameters, this

e parameter value, e the device the UP/DOWN

in increments


ZoneBaud Sets the baud rate of the zone controller on the MS/TP network.Default: Auto

(9600): 9600 bps(19200): 19200 bps(38400): 38400 bps(76800): 76800 bps(Auto): Auto Baud

Get From Gets all of the installer configuration menu parameter values except Zone MAC, ZoneBaud, RTC MAC, BO5 cont, Set Type, and Cal RS of another zone controller. Also copies the GUI Occupied Heat Spt, GUI Occupied Cool Spt, and Cfg Network Handle MS/TP Bus objects.Default: 255Note: This parameter requires

that communication on the MS/TP Bus be functioning. If communication is not functioning, the installer configuration menu does not scroll past this parameter.

Range: 001 to 255Note: Entering a zone controller address begins

parameter values of that zone controller, avalues to the zone controller from which thparameter is being set. After getting the pavalue reverts back to 255. When getting thpress the UP/DOWN arrow keys to changaddress in increments of 1; press and holdarrow keys to change the device address of 10.

RTC MAC2 Sets a unique device address for the rooftop controller to which the zone controller communicates.Default: 4Note: All zone controllers

associated with the same rooftop controller must have the same RTC MAC parameter setting as the rooftop controller.



MenuScro Gives the option of having the display continuously scroll the parameters.Note: If an outside air temperature

sensor is not installed at the rooftop controller, set the MenuScro parameter of the zone controller to off to prevent an ambiguous outside air temperature from displaying.

Default: on

(off): The scroll is inactive.(on): The scroll is active.

C or F Provides temperature scale options for display.Default: °F

(°C): Celsius Scale(°F): Fahrenheit Scale





16

lled. The BI1

bled or not NO or MotionNC.

Rooftop Controller Demand OverrideAccess

No Access

No Access

No Access

toggle from the o motion is

otion is detected act open = no d. toggle from the o motion is

otion is detected act open = motion

verride function. nsor Operation

ith either a remote

eheat

PIR Func3 Enables the PIR onboard occupancy sensor.Default: offNote: PIR is an option for

occupancy detection. Set the PIR Func parameter to off unless the PIR onboard occupancy sensor is installed. The PIR Func parameter is not automatically set when the PIR occupancy sensor cover is plugged in. You must change the PIR Func parameter setting to on to enable the PIR function.

(on): The PIR onboard occupancy sensor is instaparameter should be set to None.(off): The PIR onboard occupancy sensor is disainstalled. The BI1 parameter can be set to Motion

Lockout Selectable Lockout Levels for limiting end-user keypad interaction.Default: 0

Lockout Level

FunctionOccupied Temperature Setpoints

LocalOverride

(0): Level 1 Access Access

(1): Level 2 Access Access

(2): Level 3 Access No Access

(3): Level 4 No Access No Access

BI13 Configuration of Binary Input 1.Default: NoneNote: BI1 can be used for remote

mounted occupancy sensing.

(None): No function is associated with an input.(MotionNO*): Used in the occupied mode only tooccupied setpoint to the standby setpoint when ndetected in the zone for 30 minutes. As soon as min the zone, the occupied setpoint resumes. Contmotion detected; contact closed = motion detecte(MotionNC*): Used in the occupied mode only tooccupied setpoint to the standby setpoint when ndetected in the zone for 30 minutes. As soon as min the zone, the occupied setpoint resumes. Contdetected; contact closed = no motion detected.* This selection option setting disables any local oFor PIR models, see PIR Onboard Occupancy Se(TEC2647Z-2+PIR Model) on page 12.Advanced PIR occupancy sensing can function wNormally Open (N.O.) or Normally Closed (N.C.) PIR occupancy sensor.

RehtConf Sets the number and type of reheat stages controlled by the zone controller.Default: 1

(0): None(1): Analog Duct Reheat Only(2): On/Off Duct Reheat Only(3): On/Off Peripheral Reheat Only(4): Analog Duct Reheat and On/Off Peripheral R

AO2RA/DA4 Choice of reverse or direct acting analog reheat output signal.Default: DA

(RA): Reverse Acting, 0 to 100% = 10 to 0 VDC(DA): Direct Acting, 0 to 100% = 0 to 10 VDC





17

nsor temperature, e the temperature the UP/DOWN 0.0F°/25C°

nsor temperature, e the temperature the UP/DOWN 0.0F°/25C°

s equipment with such as electric

equipment with anical reheat

ed = Contact

d = Contact

AO2 OALK5 Sets the maximum outside air sensor temperature at which the first stage of zone reheat (analog reheat stage) can be used.Default: 55.0°F/13.0°C

Range: -40.0°F/-40.0°C to 122.0°F/50.0°CNote: When setting the maximum outside air se

press the UP/DOWN arrow keys to changin 5.0F°/2.5C° increments; press and holdarrow keys to change the temperature in 5increments.

BO5 OALK5 Sets the maximum outside air sensor temperature at which the second stage of zone reheat (on/off reheat stage) can be used.Default: 32.0°F/0.0°C

Range: -40.0°F/-40.0°C to 122.0°F/50.0°CNote: When setting the maximum outside air se

press the UP/DOWN arrow keys to changin 5.0F°/2.5C° increments; press and holdarrow keys to change the temperature in 5increments.

BO5 Time4 Sets the time base for the reheat output (if used).Default: 0

(1): 10 seconds (six cycles per minute), for variousolid-state relays that withstand short duty cyclesheat.(0): 15 minutes (four cycles per hour), for variousmechanical relays or contactors controlling mechsystems.

BO5 cont Sets the BO5 contact function.Default: N.O.

(N.C.): Energized = Contact Opened; De-energizClosed(N.O): Energized = Contact Closed; De-energizeOpened





18

usting the re, press the

N arrow keys to e temperature in ° increments;

hold the N arrow keys to e temperature in ° increments.

ing setpoints are OccTime.

ling setpoints are .

Unocc HT Sets the Unoccupied Heating setpoint value.Default: 62.0°F/16.5°C

Range: 40.0°F/4.5°C to 90.0°F/32.0°C

Note: When adjtemperatuUP/DOWchange th0.5F°/0.5Cpress andUP/DOWchange th5.0F°/5.0C

Unocc CL Sets the Unoccupied Cooling setpoint value.Default: 80.0°F/26.5°C

Range: 54.0°F/12.0°C to 100.0°F/37.5°C

St-By HT3 Sets the Standby Heating setpoint value.The value of this parameter should reside between the occupied and unoccupied heating setpoints, and ensure that the difference between the standby and the occupied values can be recovered in a timely manner when motion is detected in the zone.Default: 65.0°F/18.5°CNote: This setpoint is used when

an occupancy sensor is connected and configured on BI1, or when a PIR occupancy sensor cover is used.

Range: 40.0°F/4.5°C to 90.0°F/32.0°C

St-By CL3 Sets the Standby Cooling setpoint value.The value of this parameter should reside between the occupied and unoccupied cooling setpoints. Ensure that the difference between the standby and the occupied values can be recovered in a timely manner when motion is detected in the zone.Default: 75.0°F/24.0°CNote: This setpoint is used when

an occupancy sensor is connected and configured on BI1, or when a PIR occupancy sensor cover is used.

Range: 54.0°F/12.0°C to 100.0°F/37.5°C

Set Type Provides the option of temporarily changing the heating or cooling setpoint by pressing the UP/DOWN arrow keys.Default: permnent

(temporar): Local changes to the heating or cooltemporary and remain effective for the specified T(permnent): Local changes to the heating or coopermanently stored in the zone controller memory





19

UP/DOWN arrow nts; press and hold ime in 10-hour

1.0F°/0.5C°

.0F°/0.5C°

usting the re, press the

N arrow keys to e temperature in ° increments;

hold the N arrow keys to e temperature in ° increments.

usting the damper ress the

N arrow keys to e position in 1% ts; press and hold

WN arrow keys to e position in 10% ts.

(such as a server affect the average vel, resulting in eating weight to

TOccTime Sets the duration of the Temporary Occupancy Time when the heating or cooling setpoints in the Occupied mode are established by:• an Override Function enabled in

the Main User Menu (when the zone controller is in the Unoccupied mode)

• a temporary heating or cooling setpoint

Default: 2.0 hrs

Range: 0.0 to 12.0 hrsNote: When adjusting the TOccTime, press the

keys to change the time in 1-hour incremethe UP/DOWN arrow keys to change the tincrements.

Cal RS Sets the desired room air temperature sensor calibration (offset). The offset can be added to or subtracted from the actual displayed room temperature.Default: 0.0F°/0.0C°

Range: -5.0F°/-2.5C° to 5.0F°/2.5C° adjustable inincrements

Deadband Sets the minimum deadband between heating and cooling setpoints.Default: 2.0F°/1.0C°

Range: 2.0F°/1.0C° to 5.0F°/2.5C° adjustable in 1increments

Heat max Sets the Occupied, Standby, and Unoccupied maximum Heating setpoint values.Default: 90.0°F/32.0°C

Range: 40.0°F/4.5°C to 90.0°F/32.0°C

Note: When adjtemperatuUP/DOWchange th0.5F°/0.5Cpress andUP/DOWchange th5.0F°/5.0C

Cool min Sets the Occupied, Standby, and Unoccupied minimum Cooling setpoint values.Default: 54.0°F/12.0°C

Range: 54.0°F/12.0°C to 100.0°F/37.5°C

Min Pos Sets the minimum position of the zone damper.Default: 10%

Range: 0 to 100% Note: When adjposition, pUP/DOWchange thincrementhe UP/DOchange thincremen

Max Pos Sets the maximum position of the zone damper.Default: 100%

Range: 0 to 100%

MaxHTPos6 Sets the minimum heating position of the zone damper to maximize hot airflow on a call for reheat with cold supply air.Default: 30%

Range: 0 to 100%

PIHT Wei7 Sets the weight of the PI heating demand of a zone, used in the PI heating calculation of the zone controller.Default: 100%

(0%): PI Heating Weight of 0%(25%): PI Heating Weight of 25%(50%): PI Heating Weight of 50%(75%): PI Heating Weight of 75%(100%): PI Heating Weight of 100%Note: A zone that includes a special application

room, mechanical room, or cafeteria) mayheating demand at the rooftop controller lediscomfort in other zones. Setting the PI h0% eliminates this problem.





20

(such as a server affect the average vel, resulting in ooling weight to

k.rk.e BI1 parameter

nd ready for

hould never be

intain the setpoint; nd calculations.

TEC2647Z-2 and TEC2647Z-2+PIR Zone Controller Operation and Strategy

The zone controller is designed to control a proportional 0 to 10 VDC modulating damper actuator, unlike low-end commercial and residential zoning thermostats that are designed to control two-position (open/closed) damper actuators. Proportional modulating control enables performance and control sequences that are much closer to what is normally found in Direct Digital Control (DDC), application-specific control devices. Proper operation of the zone controllers requires proper communication between the rooftop controller and its associated zone controllers.

The data exchange from the zone controllers to the associated rooftop controller includes:

• current Proportional plus Integral (PI) heating demand, whereby the output value is based on the PI heating weight configuration

• current PI cooling demand, whereby the output value is based on the PI cooling weight configuration

The data exchange from the rooftop controller to the associated zone controllers includes:

• current central system occupancy

• current system mode active (hot or cold air being delivered)

• outside air temperature

PICL Wei7 Sets the weight of the PI cooling demand of a zone, used in the PI cooling calculation of the zone controller.Default: 100%

(0%): PI Cooling Weight of 0%(25%): PI Cooling Weight of 25%(50%): PI Cooling Weight of 50%(75%): PI Cooling Weight of 75%(100%): PI Cooling Weight of 100%Note: A zone that includes a special application

room, mechanical room, or cafeteria) maycooling demand at the rooftop controller lediscomfort in other zones. Setting the PI c0% eliminates this problem.

1. Zone MAC is the unique device address of the zone controller (from 004 to 127) on the MS/TP networ2. RTC MAC is the unique device address of the rooftop controller (from 004 to 127) on the MS/TP netwo3. The standby setpoints are used in the standby mode. The PIR Func parameter must be set to on, or th

must be set to either MotionNO or MotionNC to enable the standby mode.4. The settings for this parameter are valid only if the analog reheat sequences are enabled.5. The settings for this parameter can only be enabled if an outside air temperature sensor is connected a

operation.6. The MaxHTPos value should never be lower than the Min Pos value; likewise, the MaxHTPos value s

higher than the Max Pos value.7. The setting for this parameter does not change the PI demand used locally at the zone controller to ma

instead, it only adjusts the PI demand transferred to the rooftop controller for its highest/average dema





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PIR Onboard Occupancy Sensor (TEC2647Z-2+PIR Model)The PIR onboard occupancy sensor allows for automatic switching between fully adjustable occupied and standby temperature setpoints without user interaction. This feature results in incremental energy savings during scheduled occupied periods when the space is not being used.

Demand-Based Heating and Cooling System

The system operation determines which zone controllers have heating and cooling weighted votes used by the associated rooftop controller. The rooftop controller uses the weighted heating and cooling demand values from selected zones to determine if heating or cooling action is required for the system.

Internal and external zones are typically serviced from the same rooftop controller. As a result, the system may be exposed to conflicting mid-season heating and cooling demands. The conflicting demands are addressed with the heating and cooling lockouts, based on the outside air temperature at the rooftop controller.

The heating or cooling action at the zone depends on how the rooftop controller treats and calculates what is delivered to the zones. Many factors influence the delivery and availability of hot or cold air to satisfy the current zone demand.

Table 3 through Table 5 shows the rooftop controller system mode calculation based on the highest demand of the zones, the average of the three highest demands, or the average of the five highest demands.


22

Table 3 shows that the resulting heat and cool weight used by the rooftop controller for the three voting zones is different, meaning different heating and cooling action based on the configuration of the rooftop controller.

Table 4 shows that the resulting heat and cool weight used by the rooftop controller for the three voting zones is different, meaning different heating and cooling action based on the configuration of the rooftop controller.

• If the control type of the rooftop controller is set to the highest demand, the action of the rooftop controller is heating.

• If the control type of the rooftop controller is set to the average of the three highest demands, the action of the rooftop controller is cooling.

Table 3: System Mode Calculation with Three Voting Zones (Example 1)Heat Action Voting

Zone 1Voting Zone 2

Voting Zone 3

Current Heat Demand 50% 0% 0%

Heat Weight Set 50% 100% 100%

Resulting Heat Weight to Rooftop Controller 25% 0% 0%

Highest Resulting Heat Weight of Three Zones 25%

Average of Three Highest Resulting Heat Weights 8.3%

Cool Action Voting Zone 1

Voting Zone 2

Voting Zone 3

Current Cool Demand 0% 100% 100%

Cool Weight Set 100% 100% 50%

Resulting Cool Weight to Rooftop Controller 0% 100% 50%

Highest Resulting Cool Weight of Three Zones 100%

Average Cool Weight of Three Highest Zones 50%

Table 4: System Mode Calculation with Three Voting Zones (Example 2)Heat Action Voting

Zone 1Voting Zone 2

Voting Zone 3

Current Heat Demand 100% 0% 0%

Heat Weight Set 100% 100% 100%

Resulting Heat Weight to Rooftop Controller 100% 0% 0%




Voting Zone 2

Voting Zone 3

Current Cool Demand 0% 100% 100%

Cool Weight Set 100% 75% 75%

Resulting Cool Weight to Rooftop Controller 0% 75% 75%


Average Cool Weight of Three Highest Zones 50%


23

Voting Zone 5

0%

100%

0%

Voting Zone 5100%

75%

75%

Table 5 shows that the resulting heat and cool weight used by the rooftop controller for the five voting zones is different, meaning different heating and cooling action based on the configuration of the rooftop controller. The heating or cooling action delivered to the zones also depends on the heating and cooling lockout functions, which are based on the outside air temperature and the supply air temperature.

Overrides and Zone Controller User Interface Lockouts

Specific functions on each zone controller can be locked out by the local user. This interface lockout prevents unauthorized inputs to the system, typically in public areas or other areas where certain interface functions need to be prevented. The lockout level is accessed via the Lockout parameter in the Installer Configuration Menu. Simply set the appropriate lockout level for each zone according to the system requirements. See Table 6 for details regarding the various lockout levels.

Table 5: System Mode Calculation with Five Voting Zones (Example 3)Heat Action Voting

Zone 1Voting Zone 2

Voting Zone 3

Voting Zone 4

Current Heat Demand 100% 0% 50% 50%

Heat Weight Set 100% 100% 100% 50%

Resulting Heat Weight to Rooftop Controller 100% 0% 50% 25%



Average of Five Highest Resulting Heat Weights 35%


Voting Zone 2

Voting Zone 3

Voting Zone 4

Current Cool Demand 0% 100% 0% 0%

Cool Weight Set 100% 50% 50% 50%

Resulting Cool Weight to Rooftop Controller 0% 50% 0% 0%


Average Cool Weight of Three Highest Zones 41.7%

Average Cool Weight of Five Highest Zones 25

Table 6: Lockout Level Function Details (Part 1 of 2)Function Lockout

Level 0Lockout Level 1

Lockout Level 2

Lockout Level 3

Access the local occupied setpoint using the UP/DOWN arrow keys.

Yes Yes Yes No

Press the local OVERRIDE key to command the local override function only. The local heating and cooling demands are not sent to the rooftop controller, and the central system does not restart. This function is required only when perimeter reheat is used, and it is restarted during an override period.Pressing the OVERRIDE key allows an override only for the zone where the subject zone controller resides.

No Yes No No


24

Pressing local keys that have their function locked out causes a keypad lock message to appear on the zone controller display. If a global override is required for the entire system and all of the zones go into the occupied mode, the override must be enabled at the rooftop controller. To accomplish this override, use the local user menu at the rooftop controller or configure the extra digital input for a remote override button (if it must be installed centrally).

Zone Setpoint Limits

Note that a demand-based heating and cooling system is designed to respond to the actual local demand of a number of selected zones; this is the case even if the local demand cannot be met by the central system.

Limit the setpoint adjustments of all zone controllers, especially if they have demand voting capability at the rooftop controller. Doing so prevents any local setpoint adjustments from creating heating or cooling lockout conditions at the rooftop controller, when local setpoints are unattainable. This scenario also prevents a voting zone controller from having unreasonable authority over the system.

Example: If a local user sets the current occupied setpoint to 62°F (17°C), the PI weighted demand sent by this zone to the rooftop controller is always at its maximum value.

See Table 7 for recommended local heating and cooling setpoint limits.

Press the local OVERRIDE key to command the local override function. The local heating and cooling demands are also sent to the rooftop controller, which restarts the central system to deliver hot or cold air based on the current load demand.Pressing the OVERRIDE key allows an override only for the zone where the subject zone controller resides. Although hot or cold air is delivered to the other zones in the system, those zone controllers remain in the unoccupied mode and function using their unoccupied setpoints.

Yes No No No

Table 7: Recommended Local Heating and Cooling Setpoint LimitsConfiguration Parameter Factory Default Setting Recommended SetpointHeat max(Maximum Local Heating Setpoint Limit)

90°F (32°C) 75°F (24°C)

Cool min(Minimum Local Cooling Setpoint Limit)

54°F (12°C) 68°F (20°C)

Table 6: Lockout Level Function Details (Part 2 of 2)Function Lockout


Lockout Level 2

Lockout Level 3


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Heating and Cooling Weight Zone SelectionFor any system to operate properly, carefully determine which zones drive the system and their weight for demand calculations. The recommendations included in Table 8 are provided as a general rule, and should be re-evaluated on a per-job basis depending on the specifics of the system design and layout.

Consider the following when selecting voting zones:

• Not all zones in the system need to be voting zones. Generally, anywhere from a third to half of the total number of zones in the system should be voting zones.

• For larger installations where internal zones (zones not exposed to an outside wall) are included in the system, there should be a ratio of approximately four external voting zones for every one internal voting zone.

• Zones selected as voting zones for demand calculations should represent:

- areas that are exposed to the highest peak heating and cooling loads.

- areas that include a significant portion of the equipment peak load capacity. For example, if a system has five zones where one of the zones represents half of the peak load capacity, that zone should be selected as a voting zone.

- areas that are subject to momentary spikes in occupancy (if those zones are expected to respond during increased occupancy periods). Typical examples include conference rooms, cafeterias, or other common areas.

• Selecting a voting zone that is either undersized or commissioned with operational flaws and errors may result in erratic system behavior due to adding total demand that cannot be met.

Consider the following regarding weight parameter values of the voting zones:

• Internal zones do not affect the heating demand calculation; instead, they only affect the cooling demand calculation. Internal zones typically call for cooling during occupied periods, even during the winter months. If the internal zones ever call for heating, then it is certain that the surrounding external zones are already in the heating mode.

Table 8: Recommended Initial Number of Voting Zones with WeightTotal Number of Zones in the System

System Layout Recommended Initial Number of Voting Zones with Weight

1 to 5 All Internal or External Zones 1 to 3

3 to 5 Mix and Match of Internal and External Zones

2 to 3

6 or More1

1. Choose a practical number of zones per rooftop controller, to allow comfort in all zones.

Mix and Match of Internal and External Zones

3 to 8


26

- It is possible for an internal zone to be slightly overcooled during peak summer cooling loads. This situation happens when the rooftop controller supplies its maximum cooling capacity, and when the volume of cold air determined by the minimum position of the zone damper during occupied periods is already providing too much cooling capacity to the internal zone.

- It is also possible for an internal zone to be slightly overheated during peak winter heating loads. This situation happens when the rooftop controller supplies its maximum heating capacity; and when the volume of hot air determined by the minimum position of the zone damper during occupied periods is already providing too much heat, for which the internal zones rarely need.

• External zones considered to be of primary importance should have both their heating and cooling weight set to 100%.

• Zones considered to be of secondary importance may have their weight set to a lesser value than 100%, to reflect the importance they have in the total voting demand calculations.

• Some zones (for example, an office surrounded by panoramic windows) may experience problematic behavior while in their peak heating or cooling mode, due to location, design, and/or degree of exposure. These problematic zones can have their peak load demand satisfied; however, this usually results in higher energy costs since some of the other zones in the system are slightly overheated or overcooled. The installer is responsible for properly identifying these problematic areas and determining if they should be fully satisfied (at a certain energy expense) or if they should be left unsatisfied during specific peak load periods, to reduce energy consumption and for the greater good of the rest of the zones in the system.

- Adding many voting zones (including problematic areas) to a rooftop controller provides greater occupancy comfort at higher energy costs.

- Restricting the number of voting zones (including problematic areas) to a rooftop controller provides energy savings at the expense of occupancy comfort in some of the zones in the system.

Minimum, Maximum, and Heat Flow Adjustments

Although system balancing can be accomplished using configuration settings within the zone controller, we recommend installing a balancing damper at the balancing side takeoff of all zones. A balancing damper reduces excessive airflow and the noise that goes with it, if the zones and/or associated ductwork are oversized.

Minimum Position Adjustment (Min Pos Parameter)

This parameter sets the minimum position of the zone damper to deliver the minimum amount of air to the zone in all conditions. When powered up, the damper never closes below the minimum position setting.


27

Maximum Position Adjustment (Max Pos Parameter)

This parameter sets the maximum position of the zone damper to deliver the maximum amount of hot or cold air to the zone in all conditions. When powered up, the damper never opens above the maximum position setting.

Note: Use the Max Pos parameter to set the maximum amount of hot air delivered to the zone; not the MaxHTPos parameter. See Maximum Heat Flow Adjustment (MaxHTPos Parameter) on page 28 for a description of the MaxHTPos parameter.

The Max Pos parameter is also used to set the maximum amount of cold air delivered to the zone.

Maximum Heat Flow Adjustment (MaxHTPos Parameter)

Many assume the MaxHTPos parameter sets the maximum amount of hot air delivered to the zone, but that is not a correct assumption. Instead, the Max Pos parameter sets both the maximum amount of hot air and the maximum amount of cold air delivered to the zone. See Maximum Position Adjustment (Max Pos Parameter) on page 28 for a description of the Max Pos parameter.

The MaxHTPos parameter sets the minimum heating position of the zone damper, to maximize hot airflow on a call for reheat with cold supply air. The MaxHTPos function is only used if the local reheat configuration (RehtConf parameter) is set to any value other than (0): None (no local reheat). Table 9 includes the maximum heat flow adjustments for the various reheat stages and reheat output time bases. Table 9: Maximum Heat Flow Adjustment (Part 1 of 2)Reheat Stage (RehtConf Parameter)

Time Base for Reheat Output (BO5 Time Parameter)


(0): None N/A Leave the maximum heat flow at its default setting of 30%, or adjust it to any other setting. The maximum heat flow adjustment is not used in this scenario.

(1): Analog Duct Reheat Only

N/A Adjust the maximum heat flow to any value higher than the current selected minimum position.Example: The minimum airflow is set at 25% and the maximum heat flow is set at 75%. If the primary air is cold, when the PI heating loop (and analog output) goes from 0 to 100%, the zone damper moves linearly from 25 to 75% open.


28

The selected minimum position of the zone damper has a direct impact on the temperature stability within certain zones. Having a minimum position selected can produce an overcooling and/or overheating effect. This effect is created by the minimum position, when the primary air temperature is in the opposite mode than what the zone currently requires (for example, an internal zone that is calling for cooling in the winter, while the rooftop controller is supplying hot air for the external zones).

Depending on the application, setting a minimum position for a zone damper may be mandatory. Eliminating this minimum position, or at least lowering it to a value below the standard, may resolve certain system design issues. A good example of this is an internal zone with a grossly oversized VAV unit.

Balancing the Minimum, Maximum, and Heat Flow Values

To balance the minimum airflow:

1. Set the outside heating lockout value (H lock parameter) at the rooftop controller to ensure that local system heating is allowed.

(2): On/Off Duct Reheat Only

(0): 15 Minutes (Four Cycles per Hour)

Adjust the maximum heat flow to any value higher than the current selected minimum position.Example: The minimum airflow is set at 25% and the maximum heat flow is set at 75%. If the primary air is cold, when the BO5 output is energized on a call for heat, the zone damper moves directly from 25% open to 75% open. As soon as the BO5 output is de-energized, the zone damper returns to 25% open.

(1): 10 Seconds (Six Cycles per Hour) for Solid State Relays

Adjust the maximum heat flow to any value higher than the current selected minimum position.Example: The minimum airflow is set at 25% and the maximum heat flow is set at 75%. If the primary air is cold, when the BO5 output is energized on a call for heat, the zone damper moves directly from 25% open to 75% open. As soon as the BO5 output is de-energized, the zone damper returns to 25% open.

(3): On/Off Peripheral Reheat Only

(0): 15 Minutes (Four Cycles per Hour)

Leave the maximum heat flow at its default setting of 30%, or adjust it to any other setting. The maximum heat flow adjustment is not used in this scenario.

(1): 10 Seconds (Six Cycles per Hour) for Solid State Relays

Leave the maximum heat flow at its default setting of 30%, or adjust it to any other setting. The maximum heat flow adjustment is not used in this scenario.

(4): Analog Duct Reheat and On/Off Peripheral Reheat

N/A Adjust the maximum heat flow to any value higher than the current selected minimum position.Example: The minimum airflow is set at 25% and the maximum heat flow is set at 75%. If the primary air is cold, when the PI heating loop (and analog output) goes from 0 to 100%, the zone damper moves linearly from 25 to 75% open.

Table 9: Maximum Heat Flow Adjustment (Part 2 of 2)Reheat Stage (RehtConf Parameter)

Time Base for Reheat Output (BO5 Time Parameter)



29

2. Check that the system is in the heating mode. To do so, press the SCROLL button on the rooftop controller to show the local Zone Sequence = Heat prompt.

3. Adjust the appropriate setpoints to ensure that the voting zones call for heating.

4. Adjust the local setpoint of the currently balanced zone controller to its minimum value (for example, 60°F [16°C] or at least 7 to 8F° [3.5 to 4C°] lower than the current room temperature), to drive the zone damper to its minimum position.

5. Set the Min Pos parameter to the desired value, as required to balance the minimum airflow.

To balance the maximum airflow:

1. Set the outside heating lockout value (H lock parameter) at the rooftop controller to ensure that local system heating is allowed.

2. Check that the system is in the heating mode. To do so, press the SCROLL button on the rooftop controller to show the local Zone Sequence = Heat prompt.

3. Adjust the appropriate setpoints to ensure that the voting zones call for heating.

4. Adjust the local setpoint of the currently balanced zone controller to its maximum value (for example, 80°F [27°C] or at least 7 to 8F° [3.5 to 4C°] higher than the current room temperature), to drive the zone damper to its maximum position.

5. Set the Max Pos parameter to the desired value, as required to balance the maximum airflow.

To balance the maximum heat flow:

1. Set the outside cooling lockout value (C lock parameter) at the rooftop controller to ensure that local system cooling is allowed.

2. Set the outside reheat lockout value (AO2 OALK or BO5 OALK parameter) at the zone controller to ensure that local reheat is allowed.

3. Check that the system is in the cooling mode. To do so, press the SCROLL button on the rooftop controller to show the local Zone Sequence = Cool prompt.

4. Adjust the appropriate setpoints to ensure that the voting zones call for cooling.

5. Adjust the local setpoint of the currently balanced zone controller to its maximum value (for example, 80°F [27°C] or at least 7 to 8F° [3.5 to 4C°] higher than the current room temperature), to drive the zone damper to its minimum position.

6. Set the MaxHTPos parameter to the desired value, as required to balance the maximum heat flow.


30

Note that 0 to 100% is directly converted to 0 to 10 VDC on the VAV damper output. If the actuator has a input range of 2 to 10 VDC, then entering 50% minimum position is not directly converted to 50% VAV damper position. See Table 10 for the VAV damper position based on the actuator input range.

The damper position is never linear and proportional to the airflow in a pressure-dependent application. Depending on how the zone damper is sized, a VAV box can be, at best, slightly oversized or slightly undersized. In all instances, the PI loop of the zone controller compensates to determine the proper damper position that satisfies the current zone demand. Figure 4 illustrates the relationship between damper position and airflow for oversized and undersized VAV boxes.

Note: Be certain that the actuator is installed and set up properly so the blades of the VAV damper can rotate from the fully open to the fully closed position with no mechanical interference. To accomplish this, use the position settings on the zone controller.

Terminal Reheat Lockout

It is desirable to lock out the local terminal reheat of the zones during the summer months when reheat is not required. Locking out the local terminal reheat prevents calls for local reheat simply based on a configured outside air temperature value. Table 11 includes the terminal reheat lockout adjustments for the various reheat stages.

Table 10: VAV Damper PositionActuator Input Range

VAV Damper Position0% 10% 20% 30% 40% 50% 60% 70% 80% 100%

0 to 10 VDC 0% 10% 20% 30% 40% 50% 60% 70% 80% 100%

2 to 10 VDC 0 to 20% 28% 36% 44% 52% 60% 68% 76% 84% 100%

Table 11: Terminal Reheat Lockout Adjustment (Part 1 of 2)Reheat Stage (RehtConf Parameter)

Analog Reheat Stage (AO2 OALK Parameter)

On/Off Reheat Stage (BO5 OALK Parameter)

(0): None N/A N/A

(1): Analog Duct Reheat Only Set the analog reheat stage to the desired temperature.

N/A

Figure 4: Effective Control Area

Airflow

EffectiveControlArea

Undersized VAV Box

EffectiveControl

Area

% Open

Oversized VAV Box

Airflow

% Open FIG

: efc

tv_c

ntrl_

ar


31


Configuring the TEC2664Z-2 Rooftop ControllerThe TEC2664Z-2 Rooftop Controller comes from the factory with default settings for all configurable parameters. The default settings are shown in Table 12. Access the Installer Configuration Menu on the rooftop controller to reconfigure the parameters.

To access the Installer Configuration Menu, press and hold the MENU key for approximately 8 seconds. Once the Installer Configuration Menu begins, press the NO key to scroll through the parameters listed in Table 12. When the desired parameter appears, use the YES key to choose the desired selection option. Press the YES key and then the NO key to continue scrolling through the parameters.

When the rooftop controller is in the Installer Configuration Menu and left unattended for approximately 8 seconds, the rooftop controller reverts to the Auto Scroll Display.

Configuring Input DI1

When DI1 is configured for an alarm condition, an alarm condition appears locally when the input is closed. An alarm message is included on the Auto Scroll Display, and when the message appears, the backlight momentarily lights up.

The DI1 input can be configured to the selection options included in Table 12.

(2): On/Off Duct Reheat Only N/A Set the on/off reheat stage to the desired temperature.

(3): On/Off Peripheral Reheat Only

N/A Set the on/off reheat stage to the desired temperature.

(4): Analog Duct Reheat and On/Off Peripheral Reheat

Set the analog reheat stage to the desired temperature. This setting can be different than the on/off reheat stage temperature setting.

Set the on/off reheat stage to the desired temperature. This setting can be different than the analog reheat stage temperature setting.

Table 12: TEC2664Z-2 Rooftop Controller Installer Configuration Menu (Part 1 of 5)Parameter Appearing on Display


RTC MAC1 Sets a unique device address for the rooftop controller on the MS/TP network.Default: 4Note: This parameter setting must

be the same as the RTC MAC parameter setting for all zone controllers associated with this rooftop controller.



Table 11: Terminal Reheat Lockout Adjustment (Part 2 of 2)Reheat Stage (RehtConf Parameter)

Analog Reheat Stage (AO2 OALK Parameter)

On/Off Reheat Stage (BO5 OALK Parameter)


32

ule g

Clock Setting

s Access

cess Access

cess Access

and controls the

ating or Cooling

ing or Cooling

rementsr equipment that

.0F°/0.5C°

RTC Baud Sets the baud rate of the rooftop controller on the MS/TP network.Default: Auto

(9600): 9600 bps(19200): 19200 bps(38400): 38400 bps(76800): 76800 bps(Auto): Auto Baud

Lockout Selectable Lockout Levels for limiting end-user keypad interaction.Default: 0

Lockout Level

FunctionLocal Unocc Override2

System Mode Setting

SchedSettin

(0): Level 1 Access Access Acces

(1): Level 2 Access No Access No Ac

(2): Level 3 No Access No Access No Ac

Pwr del3 Sets the delay time period at rooftop controller powerup, or at each time power is removed and reapplied, before any operation (fan, heating, or cooling) is authorized. Also can be used to sequence the startup of multiple units in one location.Default: 30.0 sec

Range: 10.0 to 120.0 sec

CntrlTyp Sets how the rooftop controller is controlled.Default: AV_H3

(Highest): The highest PI Heating or Cooling demrooftop controller.(AV_H3): The average of the three highest PI Hedemands controls the rooftop controller.(AV_H5): The average of the five highest PI Heatdemands controls the rooftop controller.

Dis HL4 Sets the Discharge Air High Limit temperature value at which the heating stages are locked.Default: 120.0°F/49.0°C

Range: 70.0°F/21.0°C to 150.0°F/65.5°C

Dis LL4 Sets the Discharge Air Low Limit temperature value at which the cooling stages are locked.Default: 45.0°F/7.0°C

Range: 35.0°F/2.0°C to 65.0°F/18.0°C

Anticycl Anti-Short Cycle timer sets the minimum on/off times for heating and cooling stages.Default: 2.0 min

Range: 0.0 to 5.0 min adjustable in 1-minute incNote: Set the anti-short cycle timer to 0.0 min fo

already has its own anti-short cycle timer.

Heat cph Sets the maximum number of Heating cycles per hour.Default: 4.0

Range: 3.0 to 8.0 cycles per hour

Cool cph Sets the maximum number of Cooling cycles per hour.Default: 4.0

Range: 3.0 or 4.0 cycles per hour

Deadband Sets the minimum deadband between the heating and cooling setpoints.Default: 2.0F°/1.0C°

Range: 2.0F°/1.0C° to 4.0F°/2.0C° adjustable in 1increments

Units Sets the display scale of the rooftop controller.Default: Imp

(Si): Celsius/Pa(Imp): Fahrenheit/in. W.C.




33

heating or cooling

g or cooling cycle

System Mode is at Unoccupied.

me clock input, an . cupiedremote input. This e occupancy e override

n be connected to .oftop controller d into the air alarm should there

UP/DOWN arrow nts; press and hold ime in 10-hour

1.0F°/0.5C°

1.0F°/0.5C°

erts to one-stage tep is not required.

erts to one-stage tep is not required.

Fan del Fan delay extends fan operation after a heating or cooling cycle has ended.Default: off

(on): Extends fan operation by 60 seconds after acycle has ended.(off): No extension of fan operation after a heatinhas ended.Note: The fan delay is only active when the GUI

set at Auto and the GUI Occupancy is set

DI1 Configuration of Digital Input 1.Default: NoneNote: DI1 can be used for remote

mounted occupancy sensing.

(None): No function is associated with an input.(RemNSB): Remote Night Setback (NSB) via a tioccupancy sensor, or from a voltage-free contactContact open = Occupied; contact closed = Unoc(RemOVR): Temporary occupancy request via a override function is controlled by a manual remotoverride. When enabled, this condition disables thcapacity of the rooftop controller.(Filter): A Filter alarm is displayed. This alarm caa differential pressure switch that monitors a filter(Service): A Service alarm is displayed on the rowhen the input is energized. This input can be tieconditioning unit control card, which provides an be a malfunction.

TOccTime Sets the duration of the Temporary Occupancy Time when the heating or cooling setpoints in the Occupied mode are established by:• an Override Function enabled in

the Main User Menu (when the rooftop controller is in the Unoccupied mode)

• a temporary heating or cooling setpoint

Default: 3.0 hrs

Range: 0.0 to 12.0 hrsNote: When adjusting the TOccTime, press the

keys to change the time in 1-hour incremethe UP/DOWN arrow keys to change the tincrements.

Cal RS Sets the desired Room Air Temperature Sensor Calibration (offset). The offset can be added to or subtracted from the actual displayed room temperature.Default: 0.0F°/0.0C°


Cal OS Sets the desired Outside Air Temperature Sensor calibration (offset). The offset can be added to or subtracted from the actual displayed outside air temperature.Default: 0.0F°/0.0C°


H stage Sets the number of Heating stages.Default: 2

(1): One stage of heating(2): Two stages of heatingNote: Two-stage rooftop controller operation rev

operation only when the second heating s

C stage Sets the number of Cooling stages.Default: 2

(1): One stage of cooling(2): Two stages of coolingNote: Two-stage rooftop controller operation rev

operation only when the second cooling s




34

g:

g:

Unoccupied= Unoccupiedpied/Unoccupied 1 is used).

is the time at s attained. The he equipment start

is the time at

H lock5 Discontinues Heating operation in response to the outside air temperature. Requires that an outside air temperature sensor be installed and connected.Default: 120.0°F/49.0°C

Range: -15.0°F/-26.0°C to 120.0°F/49.0°C

C lock5 Discontinues Cooling operation in response to the outside air temperature. Requires that an outside air temperature sensor be installed and connected.Default: -40.0°F/-40.0°C

Range: -40.0°F/-40.0°C to 95.0°F/35.0°C

2/4event Sets the number and configuration of events.Default: 2 events

(2 events): Sets up programming for the followinEvent 1 is for Occupied setpoints. Event 2 is for Unoccupied setpoints.

(4 events): Sets up programming for the followinEvent 1 is for Occupied setpoints. Event 2 is for Unoccupied setpoints. Event 3 is for Occupied setpoints. Event 4 is for Unoccupied setpoints.

Aux cont Energizes peripheral devices (lighting equipment, exhaust fans, and economizers).Default: n.o.

(n.c.): Contact open = Occupied; contact closed =(n.o.): Contact closed = Occupied; contact open Note: The contact toggles with the internal Occu

schedule (or the remote NSB contact if DI

Prog rec Enables Progressive recovery.Default: offNote: Progressive recovery is

automatically disabled if DI1 is configured for remote NSB.

(on): Progressive recovery enabledNote: The programmed Occupied schedule time

which the desired Occupied temperature irooftop controller automatically optimizes ttime.

(off): Progressive recovery disabledNote: The programmed Occupied schedule time

which the system restarts.

Occ CL4 If network communication is lost with the zone controller(s), the return air sensor controls the rooftop controller to maintain this Cooling setpoint.Default: 72.0°F/22.0°C

Range: 54.0°F/12.0°C to 100.0°F/37.5°C

Occ HT4 If network communication is lost with the zone controller(s), the return air sensor controls the rooftop controller to maintain this Heating setpoint.Default: 70.0°F/21.0°C

Range: 40.0°F/4.5°C to 90.0°F/32.0°C

Unocc CL4 If network communication is lost with the zone controller(s), the return air sensor controls the rooftop controller to maintain this Unoccupied Cooling setpoint.Default: 82.0°F/28.0°C

Range: 54.0°F/12.0°C to 100.0°F/37.5°C




35

rk.

ments; press and

rements; press and

rements; press and

TEC2664Z-2 Rooftop Controller Operation and StrategyContrary to low-end commercial and residential zone controllers that use two-position demand and no demand logic to energize heating and cooling, the TEC2664Z-2 Rooftop Controller uses PI demand to operate heating and cooling stages. In addition, accurate temperature control at the zones is achieved via a unique, time-proportioning algorithm that virtually eliminates temperature offset associated with traditional, differential-based zone controllers. This feature enables performances and control sequences that are much closer to what is normally found in DDC application-specific control devices.

The operation of the rooftop controller is directly related to the operation of the dedicated zone controllers. Although the rooftop controller can operate in a stand-alone manner if network communication is lost, normal system operation requires that this network communication is functional.

Data Exchange between the Rooftop Controller and the Zones

Heating and cooling demand is first exchanged from the zone controllers to the rooftop controller. These output values are based on the PI heating weight configuration and the PI cooling weight configuration. Each voting zone also calculates its demand values based on the occupancy mode and setpoints currently in use: either Unoccupied, Standby, or Occupied.

Unocc HT4 If network communication is lost with the zone controller(s), the return air sensor controls the rooftop controller to maintain this Unoccupied Heating setpoint.Default: 62.0°F/17.0°C

Range: 40.0°F/4.5°C to 90.0°F/32.0°C

Sp range6 Sets the static pressure transducer range.Default: 0

(0): 0 in. W.C./0 Pa to 1.5 in. W.C./375 Pa(1): 0 in. W.C./0 Pa to 2 in. W.C./500 Pa(2): 0 in. W.C./0 Pa to 3 in. W.C./750 Pa(3): 0 in. W.C./0 Pa to 4 in. W.C./1,000 Pa(4): 0 in. W.C./0 Pa to 5 in. W.C./1,250 Pa

Pressure6 Sets the static pressure transducer setpoint maintained by the bypass damper.Default: 0.8 in. W.C./200 Pa

Range: 0 in. W.C./0 Pa to 2 in. W.C./500 Pa

1. RTC MAC is the unique device address of the rooftop controller (from 004 to 127) on the MS/TP netwo2. Local Unocc Override appears only when in the Unoccupied mode.3. When adjusting the numeric value, press the UP/DOWN arrow key to change the value by single incre

hold the UP/DOWN arrow key to change the numeric value in increments of ten.4. When adjusting the temperature, press the UP/DOWN arrow key to change the value in 0.5F°/0.5C° inc

hold the UP/DOWN arrow key to change the value in 5.0F°/5.0C° increments.5. When adjusting the temperature, press the UP/DOWN arrow key to change the value in 5.0F°/5.0C° inc

hold the UP/DOWN arrow key to change the value in 50.0F°/50.0C° increments.6. This value is adjustable in 0.1 in. W.C./25 Pa increments.




36

The rooftop controller calculates the resulting PI heating and cooling demands based on the control type configuration (CntrlTyp parameter setting). See Demand-Based Heating and Cooling System on page 22 for more information.

• If the resulting calculated PI heating demand is greater than the resulting calculated PI cooling demand, then the zone controller sequence is heating.

• If the resulting calculated PI cooling demand is greater than the resulting calculated PI heating demand, then the zone controller sequence is cooling.

• If the resulting calculated PI cooling demand is equal to the resulting calculated PI heating demand, then the zone controller sequence remains in its latest mode.

Many factors can limit action to the heating and cooling stages, including:

• heating and cooling lockout based on the outside air temperature

• heating or cooling lockout based on the supply air temperature

• heating or cooling lockout based on anti-cycling

• fixed 2-minute delay when the rooftop controller toggles between heating and cooling

The rooftop controller forwards the following data to the zone controllers:

• current central system occupancy

• current zone sequence required (either hot or cold air delivered to the zone)

• outside air temperature

Occupancy and Overrides

The occupancy mode of all the zones in a system is typically dictated by the rooftop controller schedule. If the schedule output value is unoccupied (as displayed on the rooftop controller), then the zones in the system are in the unoccupied mode. If the schedule output value is occupied (as displayed on the rooftop controller), then the zones in the system are either in the occupied mode or the standby mode if the local PIR function is used.

It is possible to use a remote schedule via the DI1 parameter with a time clock input, an occupancy sensor, or from a voltage-free contact. Doing so disables the local schedule occupancy function to the zones.

Global override for the entire system including all zones is initiated at the rooftop controller level only. Set the override using the Main User Menu at the rooftop controller, or by configuring the extra digital input (DI1 parameter) for a remote override button if it is required to be installed centrally.

Any zone overrides trigger the necessary heating or cooling action for the required zone only. All other zones in the system that do not require an override remain in the unoccupied mode.


37

Rooftop Controller User Interface LockoutsThe rooftop controller can be set to lock out specific functions performed by the local user. This interface lockout prevents unauthorized inputs to the system, typically in public areas or other areas where certain interface functions need to be prevented. The lockout level is accessed via the Lockout parameter in the Installer Configuration Menu. Simply set the appropriate lockout level for each zone according to the system requirements. See Table 13 for details regarding the various lockout levels.

Rooftop Controller Heating and Cooling Supply Air Temperature Lockouts

One problematic aspect of any VAV zoning control system is high heating or cooling demand when most of the zone dampers are closed. As a result of this situation, most of the supply air is recirculated through the pressure bypass, leading to extremely hot or cold supply air conditions.

To prevent high supply air temperatures (specifically with gas heating systems), set the discharge air high limit temperature (Dis HL parameter) to the required value.

• Default: 120.0°F/49.0°C

• Range: 70.0°F/21.0°C to 150.0°F/65.5°C

• When adjusting the temperature, press the UP/DOWN arrow key to change the value in 0.5F°/0.5C° increments; press and hold the UP/DOWN arrow key to change the value in 5.0F°/5.0C° increments.

To prevent low supply air temperatures (specifically to guard against coil freeze-up when a high bypass ratio is in effect), set the discharge air low limit temperature (Dis LL parameter) to the required value.

• Default: 45.0°F/7.0°C

• Range: 35.0°F/2.0°C to 65.0°F/18.0°C

• When adjusting the temperature, press the UP/DOWN arrow key to change the value in 0.5F°/0.5C° increments; press and hold the UP/DOWN arrow key to change the value in 5.0F°/5.0C° increments.

Table 13: Lockout Level Function DetailsFunction Lockout


Lockout Level 2

Global Override Function via Main User Menu Yes Yes No

System Mode Access via Main User Menu Yes No No

Local Schedule Access via Main User Menu Yes No No

Local Clock Setting via Main User Menu Yes Yes Yes


38

Rooftop Controller Heating and Cooling Outside Air Temperature LockoutsUse the C lock parameter to disable cooling operation in response to the outside air temperature. Likewise, use the H lock parameter to disable heating operation in response to the outside air temperature. Both the heating and cooling outside air temperature lockouts require that an outside air temperature sensor be installed and connected.

The installer is responsible for setting the rooftop controller mode lockouts properly to minimize heating and cooling equipment cycling while considering occupancy comfort. The lockout settings are also dependent on the load requirements for the specific geographical region:

• In cool climate regions, the installer may allow the rooftop controller to deliver heating up to a 75°F (24°C) outside air temperature due to the amount of the time it takes for building mass to heat up when transitioning from a cold night into a hot, mid-season day.

• In warm climate regions, the installer may allow the rooftop controller to deliver cooling without a cooling mode lockout, while imposing strong restrictions on the heating side of the system.

Heating and cooling equipment cycling occurs only in the overlapping deadband between the C lock and H lock parameter settings as illustrated in Figure 5. The tighter the deadband between these two parameter settings, the less heating and cooling equipment cycling occurs.

Figure 5: Overlapping Deadband

OverlappingDeadband =

10F°/6C°

FIG

:ovr

lppn

g_dd

bnd

Cooling Lockout =65°F (18°C)

Heating Lockout =75°F (24°C)

Outside Air Temperature


39

It is possible to adjust the system to completely eliminate heating and cooling equipment cycling based on the outside air limitations, if this type of system operation is desired. Figure 6 illustrates two ways to eliminate overlapping deadband and the associated equipment cycling. Note that eliminating overlapping deadband may impact the control performance of certain zones during other periods of system operation.

Seasonal Changeover

Heating and cooling equipment cycling during seasonal changeover is almost inevitable with a VAV zoning control system, if any degree of occupancy comfort is to be maintained. A properly set up system delivers comfort to conflicting zone demands during seasonal changeover by alternating between heating and cooling at the rooftop controller.

Unwanted heating and cooling switchovers are eliminated by either using and authorizing terminal reheat, or by limiting the rooftop controller heating and cooling capacity throughput based on the outside air temperature (H lock and C lock parameters). Note that limiting the rooftop controller heating and cooling capacity throughput based on the outside air temperature may impact the control performance of certain zones in the system, since the required heating or cooling capacity is no longer available due to the lockout conditions.

Figure 6: No Overlapping Deadband

5F° (3C°)

Deadband;No Heating

andNo Cooling







No Overlapping Deadband

FIG

:no_

ovrlp

png_

ddbn

d


40

Typically, the number of rooftop controller heating and cooling switchover cycles during conflicting demand periods is approximately the same as the number of heating and cooling cycles per hour (Heat cph and Cool cph parameters). The default for Heat cph and Cool cph is four cycles per hour, meaning two heating cycles and two cooling cycles within a 1-hour period.

The recorded rooftop controller change in supply temperature and demand variances is always higher when using the Highest demand control-type operation versus the Average demand method calculations. Energy consumption is also higher with the Highest demand control-type operation versus the Average demand method calculations.

Bypass Damper Control and Operation

The rooftop controller has a built-in static pressure control loop with an analog 0 to 10 VDC bypass damper output. For proper operation, the static pressure control loop must have a static pressure sensor connected to the static pressure input (Terminal SP) on the rooftop controller. Typically, the static pressure sensor probe is installed approximately two-thirds the way down the main ventilation trunk.

The required static pressure transducer needs to be a voltage type (0 to 5 VDC input range) with a 24 VAC half-wave (rectifier) power supply. Set the static pressure transducer range (using the SP range parameter) to one of the following:

• (0): 0 in. W.C./0 Pa to 1.5 in. W.C./375 Pa

• (1): 0 in. W.C./0 Pa to 2 in. W.C./500 Pa

• (2): 0 in. W.C./0 Pa to 3 in. W.C./750 Pa

• (3): 0 in. W.C./0 Pa to 4 in. W.C./1,000 Pa

• (4): 0 in. W.C./0 Pa to 5 in. W.C./1,250 Pa

Set the static pressure transducer setpoint is using the Pressure parameter. The default setpoint is 0.8 in. W.C./200 Pa, and is adjustable from 0 in. W.C./0 Pa to 2 in. W.C./500 Pa in 0.1 in. W.C./25 Pa increments.

The static pressure scale automatically changes from inches of water column (in. W.C.) to Pascals (Pa) when the Units parameter is changed from (Imp): Fahrenheit/in. W.C. to (Si): Celsius/Pa.

Operation of the static pressure control loop depends on whether the fan is running. For proper operation of the static pressure control loop, the static pressure control actuator must be installed properly. When the control signal is 0 VDC, the static pressure damper is fully closed with no air recirculating from the supply to the return. Conversely, when the control signal is 10 VDC, the static pressure damper is fully open with maximum air recirculating from the supply to the return.


41

When the fan output is off (Terminal G), the static pressure control loop is also off and the bypass damper is fully open to the 10 VDC output. This condition minimizes the air pressure related noise during initial fan startup. Be aware that the fan is always on during occupied periods, and that it only cycles on demand with the heating and cooling stages during unoccupied periods.

When the fan output is on (Terminal G), the static pressure control loop is enabled and the bypass damper modulates to maintain the desired static pressure setpoint based on the static pressure input reading at the rooftop controller. Use the Manual Scroll Display feature at the rooftop controller to locate the Pressure parameter and determine the current static pressure value.

Sequence of Operation

TEC2647Z-2 and TEC2647Z-2+PIR Zone ControllersThe sequence of operation is determined by the Johnson Controls TEC2664Z-2 Rooftop Controller mode and the configuration parameters preselected for the zone controller; see TEC2664Z-2 Rooftop Controller on page 43 for more information. See Figure 7 through Figure 16 for sequence of operation examples.

PIR Occupancy Sensor Operation

The zone controller is available with or without a factory-installed PIR occupancy sensor cover. A zone controller equipped with the PIR occupancy sensor cover provides advanced active occupancy logic that automatically switches occupancy levels from occupied to standby as required, when motion is sensed. This feature results in incremental energy savings during scheduled occupied periods when the space is unoccupied. This allows zones, such as conference rooms and storage rooms, that are infrequently occupied to use relaxed setpoints during most of their occupied period when the space is not being used.

The aim of using a standby setpoint is to have the system recover fairly quickly between the standby and occupied setpoints when motion is detected in the zone. The relaxed value of the standby setpoint must be far enough from the occupied setpoint to warrant the energy savings of a PIR occupancy sensor cover installation, but close enough for the system to recover quickly to ensure occupancy comfort.

To enable the advanced occupancy logic, the following must be set at the zone controller:

• If a local PIR occupancy sensor cover is installed, the PIR Func parameter must be set to on.

• If a remote PIR occupancy sensor is attached to BI1, the BI1 parameter must be set to MotionNO or MotionNC.


42

PIR Occupancy Sensor LogicThe PIR occupancy sensing function is only used during occupied periods. If occupancy is desired during an unoccupied period, simply press the local override button (if allowed by the local lockout level configuration). The local occupancy toggles to override (local occupied) per the TOccTime parameter setting for overrides.

If the PIR occupancy sensor detects no motion, the zone controller remains in the standby mode. If motion is detected, the zone controller switches to the occupied mode for a period of 60 minutes after the last motion was detected. When the 60-minute period expires and no additional motion is detected, the zone controller switches back to the standby mode.

TEC2664Z-2 Rooftop Controller

The sequence of operation of the zones is commanded from the TEC2664Z-2 Rooftop Controller on a Change of Value (COV) basis. The rooftop controller transmits its current sequence mode to the zones, depending on the highest or highest average PI demand. The available sequence values at the zones are heating and cooling. There is a 2-minute delay when toggling between the heating and cooling modes. This delay only applies when the system is switching over from the network demand; the delay is not active when working with Comm Lost using the return air temperature sensor or the room air temperature sensor. If the system mode of the rooftop controller is set to off, the sequence value at the zone is cooling by default.

Note: If no return air sensor is installed and loss of communication occurs, control of the rooftop unit is based on the onboard sensor readings of the rooftop controller.

The user can choose between a single highest PI demand, an average of the three highest PI demands, or an average of the five highest PI demands.

Using the five highest PI demands as an example, five buffers are required in the BACnet module of the rooftop controller for the PI heating demand and five additional buffers are required for the PI cooling demand. Each time a new zone sends its PI cooling demand, the rooftop controller compares it to the lowest of the five values already stored and buffers it (if required). The rooftop controller averages these five values, and the PI heating demand or PI cooling demand controls the rooftop controller.

See Figure 7 through Figure 17 for sequence of operation examples.


43

CoolingSetpoint

HeatingSetpoint

AO1

FIG

:cnt

rl_cr

v_1

Figure 7: Zone Controller Set for No Reheat, AO2 = 0 VDC and BO5 = Off(Rooftop Controller in Cooling Mode)

CoolingSetpoint

HeatingSetpoint

AO1

FIG

:cnt

rl_cr

v_2

Figure 8: Zone Controller Set for No Reheat, AO2 = 0 VDC and BO5 = Off (Rooftop Controller in Heating Mode)

CoolingSetpoint

* If AO2 stage is locked, then AO1 = minimum position.

HeatingSetpoint

AO1

AO2

FIG

:cnt

rl_cr

v_3

Figure 9: Zone Controller Set for Analog Duct Reheat Only, BO5 = Off (Rooftop Controller in Cooling Mode)


44

TEC2664Z-2 Rooftop Controller Operation

Main User Menu Access ModificationsEach of the sections in the Main User Menu are accessed and programmed using the five keys on the cover of the TEC2664Z-2 Rooftop Controller. See TEC2664Z-2 Rooftop Controller Operation Overview on page 13 for a description of the five user interface keys. Figure 18 charts the flow of the Main User Menu.

CoolingSetpoint

HeatingSetpoint

AO1

AO2

FIG

:cnt

rl_cr

v_4

Figure 10: Zone Controller Set for Analog Duct Reheat Only, BO5 = Off (Rooftop Controller in Heating Mode)

CoolingSetpoint

HeatingSetpoint

A01

B05

FIG

:cnt

rl_cr

v_5

Figure 11: Zone Controller Set for On/Off Duct Reheat Only,AO2 = 0% and On/Off Reheat Time Base = 10 Seconds

(Rooftop Controller in Cooling Mode)


45

FIG

:cnt

rl_cr

v_6

CoolingSetpoint

HeatingSetpoint

AO1

B05

Figure 12: Zone Controller Set for On/Off Duct Reheat Only,AO2 = 0% and On/Off Reheat Time Base = 15 Minutes


CoolingSetpoint

HeatingSetpoint

AO1

B05

FIG

:cnt

rl_cr

v_7

Figure 13: Zone Controller Set for On/Off Duct Reheat Only, AO2 = Off(Rooftop Controller in Heating Mode)


46

CoolingSetpoint

HeatingSetpoint

AO1

B05

AO1

FIG

:cnt

rl_cr

v_8

Figure 14: Zone Controller Set for On/Off Peripheral Reheat Only, AO2 = 0%(Rooftop Controller in Cooling Mode)

CoolingSetpoint

HeatingSetpoint

AO1AO2

B05

* If AO2 stage is locked, then AO1 = minimum position.

FIG

:cnt

rl_cr

v_9

Figure 15: Zone Controller Set for Terminal Reheat on AO2 and Peripheral Heating on BO5



47

FIG

:cnt

rl_cr

v_10

ing on BO5

FIG

:tw_s

tg_h

tng_

tw_s

tg_c

lgelected)

100%PI Demand

CoolingSetpoint

HeatingSetpoint

AO1

AO2

B05

Figure 16: Zone Controller Set for Terminal Reheat on AO2 and Peripheral Heat(Rooftop Controller in Heating Mode)

PI Demand (Depends on Control Type Selected)

Increase Heating

Stage 2Start/Stop(Approx.)



100%PI Demand

PI Demand (Depends on Control Type S

Increase Cooling

Stage1

Stage2

Stage1

Stage2


0%PI Demand

Figure 17: Rooftop Controller Sequence of Operation for Two-Stage Heating and Two-Stage Cooling


48

FIG

:mn_

usr_

mnu

The system mode can be set to either Off or Auto. The Auto mode allows the rooftop controller to determine, from the average PI demand (if a network is detected) or from the return air sensor PI demands (if a network is not detected), if the rooftop unit is in heating mode or cooling mode.

Sequence of Auto Status Display ScrollingThe TEC2664Z-2 Rooftop Controller features a two-line, eight-character status display. A low-level, backlight is always active, and can only be seen in the dark. When the rooftop controller is left unattended, an auto scroll status display indicates the actual status of the system.

Figure 18: Main User Menu


49

Alarms(If Detected)

Service2

DAS Alm3

SetClock4

Filter5

Comm Lost6

Each item is scrolled one-by-one with the backlight in the low-level mode. Pressing any key causes the low-level backlight to brighten to high-level mode. When left unattended for 30 seconds after changes are made, the display resumes auto status display scrolling.

To brighten the low-level backlight to high-level mode, simply press any key on the face of the rooftop controller. The high-level backlight returns to low-level mode when the rooftop controller is left unattended for 45 seconds.

If alarms are detected, they are automatically displayed at the end of the status display scroll. During an alarm message display, the backlight lights up at the same time as the alarm message and shuts off during the remainder of the status display scroll. Two alarm messages can appear at any given time.

The priority of alarms is as follows:

• Comm Lost: This alarm indicates that communication is lost between the rooftop controller and the zone devices on the MS/TP Bus; however, the rooftop controller can remain online with the supervisory controller.

• SetClock: This alarm indicates that the clock needs to be reset due to a power failure of more than 6 hours.

• DAS Alrm: This alarm indicates a high or low alarm at the discharge air sensor. If no discharge air sensor is connected (-40.0°F/-40.0°C reading), the associated functions (such as lockouts and alarms) are disabled. If the discharge air sensor is shorted (122.0°F/50.0°C reading), the associated functions (such as lockouts and alarms) are enabled.

• Service: This alarm indicates there is a service alarm, as per the configurable Digital Input DI1.

• Filter: This alarm indicates that the filters are dirty and need to be replaced, as per the configurable Digital Input DI1.

See Table 14 for the sequence of auto status display scrolling.

Table 14: Sequence of Auto Status Display ScrollingClock Status System Mode Schedule Status Outdoor

Temperature1

Monday12:00 A.M.

Sys ModeOff

Occupied Outdoorxx.x °C or °F

Sys ModeAuto

Unoccupied

Override


50

temperature sensor tside air scrolling skips past

failure).

1. The outdoor temperature displays only if an outside air temperature sensor is installed. If an outside air is not installed, an ambiguous outdoor temperature displays on the zone controller indicating that no outemperature sensor is installed. If no outside air temperature sensor is installed, the auto status displaythe outdoor temperature.

2. This alarm is valid only if the DI1 parameter is configured and used as a service alarm.3. This alarm is valid only if the Dis HL or Dis LL parameter is enabled.4. This alarm is valid only if the power off clock time retention has expired.5. This alarm is valid only if the DI1 parameter is configured and used as a filter alarm.6. This alarm is valid only if communication is lost to the zones (not necessarily a BACnet communication


51

temperature sensor tside air scrolling skips past

Alarms(If Detected)

Service2

DAS Alm3

SetClock4

Filter5

Comm Lost6

failure).

Current Static PressurePressurex.x W.C. or Pa

Highest PICool Demand Zone AddressCool MACxxx

Sequence of Manual Status Display ScrollingPress the YES key repeatedly to manually scroll through each menu item. The last menu item viewed remains on the display for 30 seconds before auto status display scrolling resumes. The temperature reading is automatically updated when scrolling is held.

See Table 15 for the sequence of manual status display scrolling. Table 15: Sequence of Manual Status Display ScrollingClock Status System Mode Schedule Status Outdoor

Temperature1

1. The outdoor temperature displays only if an outside air temperature sensor is installed. If an outside air is not installed, an ambiguous outdoor temperature displays on the zone controller indicating that no outemperature sensor is installed. If no outside air temperature sensor is installed, the auto status displaythe outdoor temperature.

Monday12:00 A.M.

Sys ModeOff

Occupied Outdoorxx.x °C or °F

2. This alarm is valid only if the DI1 parameter is configured and used as a service alarm.

Sys ModeAuto

Unoccupied

3. This alarm is valid only if the Dis HL or Dis LL parameter is enabled.

Override

4. This alarm is valid only if the power off clock time retention has expired.5. This alarm is valid only if the DI1 parameter is configured and used as a filter alarm.6. This alarm is valid only if communication is lost to the zones (not necessarily a BACnet communication

Current Zone Sequence Return Air Temperature

Discharge Air Temperature

Zone SeqOff

RA Tempxx.x°F or °C

DA Tempxx.x°F or °C

Zone SeqCool

Zone Seq

Heat

Effective PI Heat Demand at the Rooftop Unit

Effective PICool Demand at the Rooftop Unit

Highest PIHeat Demand Zone Address

Heat Outxxx%

Cool Outxxx%

Heat MACxxx


52

Sequence of Operation

FIG

:htn

g_cl

ng

Figure 19: Heating/Cooling Stages Handling

Start

G Fan Output = On

Bypass Damper OutputBased on Static PressureInput

No

Yes

Bypass Damper Loop = Disabled

Bypass Damper Position = 100% Forced Open = 10 VDCExit

Exit

FIG

:byp

s_dm

pr

Figure 20: Bypass Damper Sequence

FIG

:sys

tm_m

de_f

n_op

rtn

Figure 21: System Mode and Fan Operation


53

System CommissioningFor the TEC Zoning Control System to operate properly, proper system commissioning must be accomplished at all levels of the control system. A properly operating control system depends heavily on both the demand and the response functions being fully functional at the rooftop controller level, as well as at the zone controller level.

Proper Commissioning of the Zone ControllersAt the zone controller level, be certain of the following:

• Properly design and size the VAV zone damper and the air distribution system to accommodate peak load demands when the rooftop controller delivers the capacity.

• Check that the full span of the damper blade rotation is available to the VAV actuator and the zone controller. There should be no mechanical limits on the damper blade rotation, since those limits are set by the zone controller parameters.

• Set the VAV actuator for either Direct Acting (DA) or Reverse Acting (RA). If the actuator is reversed, the zone demand can never be satisfied. If the zone is a voting zone, it continuously sends demand signals to the rooftop controller.

System Mode = Off? Zone Sequence = Cool

Avg PI Heating Demand > AvgPI Cooling Demand? Zone Sequence = Heat

NO

NO

Avg PI Cooling Demand > AvgPI Heating Demand? Zone Sequence = Cool

NO

Avg PI Cooling Demand = AvgPI Heating Demand? Zone Sequence Stays in Existing Mode

FIG

:zn_

sqnc

_slc

tn

Figure 22: Zone Sequence Selection


54

• Properly set the Min Pos, Max Pos, and MaxHTPos parameters during zone damper balancing. If the local VAV trunk is equipped with a main trunk-side takeoff directional adjustment blade, additional adjustments are also required.

• Evaluate and set the parameters for the reheat lockouts, setpoint limits, user interface lockouts, and demand weight adjustments to the rooftop controller, according to the installation requirements.

• Set all zone controllers associated with the same rooftop controller to the same RTC MAC parameter setting as the rooftop controller.

Proper Commissioning of the Rooftop Controller

At the rooftop controller level, be certain of the following:

• Size the heating and cooling capacity of the rooftop controller to respond to the highest instantaneous peak loads from the associated zones.

• Incorporate the proper strategy and system layout into the mechanical system architecture.

• Properly commission and verify the bypass damper system. A wrongly set up bypass damper system may result in all of the zones being properly commissioned and sized, but the rooftop controller still may not deliver the capacity to the zones.

• Evaluate and set the parameters for the heating and cooling lockouts, control type strategy, discharge air high and low limits, static pressure transducer range, and static pressure transducer setpoint, according to the installation requirements.

• Verify the input/output operation of the rooftop controller, as well as the onboard economizer operation.


55

System Operation ChecklistsWe recommend keeping a checklist of all control system milestones and configuration settings at system startup. Keep these records as a reference with the control system when it is fully commissioned. The checklists included in Table 16 through Table 22 are provided as a guideline, and can be very helpful when servicing the control system. Table 16: Rooftop Controller UnitManufacturer Serial NumberModel Number Year of ManufactureLocation Date of Original InstallationCooling Tonnage Cooling Number of StagesHeating Capacity Heating Number of StagesMaximum cfm Total Number of Zones

Table 17: Rooftop Controller ConfigurationRTC MAC1

1. This parameter setting is critical for proper control system operation.

Cal RS

RTC Baud1 Cal OS

Lockout H stagePwr del C stage

CntrlTyp1 H lock1

Dis HL1 C lock1

Dis LL1 2/4event

Anticycl Aux contHeat cph Prog recCool cph Occ CLDeadband Occ HTUnits Unocc CLFan del Unocc HTDI1 Sp range1

TOccTime Pressure1

Table 18: Rooftop Controller Local Schedule SettingsDay of the Week

Occupied Day?

First Occupied Event

Second Unoccupied Event

Third Occupied Event

Fourth Unoccupied Event

MondayTuesdayWednesdayThursdayFridaySaturdaySunday


56

Table 19: Rooftop Controller CommissioningRooftop Controller Mechanical Cooling Functional Verification CompleteMaximum Change in Temperature (Return Air Temperature to Supply Air Temperature) for Cooling Stage 1Maximum Change in Temperature (Return Air Temperature to Supply Air Temperature) for Cooling Stage 1 and 2Economizer Cooling Functional Verification CompleteMinimum Position of Economizer Properly Set?Rooftop Controller Auxiliary Output Used to Disable Minimum Position of Economizer Check?Rooftop Controller Heating Functional Verification CompleteMaximum Change in Temperature (Return Air Temperature to Supply Air Temperature) for Heating Stage 1Maximum Change in Temperature (Return Air Temperature to Supply Air Temperature) for Heating Stage 1 and 2

Static Pressure Transducer Input Reading with Fan Off1

Maximum Static Pressure Transducer Input Reading with Fan On2

Static Pressure Damper Actuator Properly Rigged and Verified?Critical Parameters Properly Set?

RTC MACRTC BaudCntrlTypDis HLDis LLH lockC lockSp rangePressure

Communication with the Zones Active (Status LED and Manual Scroll Display)?Local Time Clock Set?Local Schedule Set?Local System Mode Set to Auto with System On?Outside Air Temperature Sensor Properly Connected and Displaying Temperature (Manual Scroll Display)?Supply Air Temperature Sensor Properly Connected and Displaying Temperature (Manual Scroll Display)?Return Air Temperature Sensor Properly Connected and Displaying Temperature (Manual Scroll Display)?

1. This static pressure transducer input reading should be either 0 in. W.C. or 0 Pa.2. This static pressure transducer input reading should be taken with all VAV dampers in the fully

closed position.


57

Table 20: Zone Controller Number ( _____ )1Location Date of Original

InstallationVAV Damper Inlet Diameter (Inches)

Zone Vocation and Use

Perimeter Zone? VAV Actuator BrandInternal Zone? VAV Actuator ModelType of Reheat (If Installed)

Capacity of Reheat (If Installed)

1. Use the Zone MAC address for the zone controller number, and repeat this checklist for all other zone controllers in the system.

Table 21: Zone Controller ConfigurationZone MAC1 Unocc HT

ZoneBaud1 Unocc CL

Get From St-By HT

RTC MAC1 St-By CL

MenuScro Set TypeC or F TOccTimePIR Func Cal RS

Lockout1 Deadband

BI1 Heat max1

RehtConf1 Cool min1

AO2RA/DA Min Pos1

AO2 OALK1 Max Pos1

BO5 OALK1 MaxHTPos1

BO5 Time PIHT Wei1

BO5 cont PICL Wei1

1. This parameter setting is critical for proper control system operation.

Table 22: Zone Controller Number ( _____ )1 Commissioning (Part 1 of 2)VAV Damper Actuator Properly Rigged and Verified (Opens and Closes with Demand)?Proper Adjustments of Zone-Side Takeoff Balancing Damper?Proper Balancing of Zone Minimum Position? cfm =Proper Balancing of Zone Maximum Position? cfm =Proper Balancing of Zone Maximum Heat Flow Position (If Reheat is Used)?

cfm =

Verification of Reheat (If Reheat is Used)Maximum Change in Temperature of Reheat (If Duct Reheat is Used)Critical Parameters Properly Set?

Zone MACZoneBaudRTC MACLockout


58

MS/TP Bus Objects When Networked with a Supervisory Controller

TEC2647Z-2 and TEC2647Z-2+PIR Zone Controllers

RehtConf (If Reheat is Used)AO2 OALK (If Reheat is Used)BO5 OALK (If Reheat is Used)Heat maxCool minMin PosMax PosMaxHTPosPIHT Wei Voting

Zone for Heating?

PICL Wei Voting Zone for Cooling?

Communication with the Rooftop Controller Active (Status LED and Outside Air Temperature Display)?

1. Use the Zone MAC address for the zone controller number, and repeat this checklist for all other zone controllers in the system.

Table 23: TEC2647Z-2 and TEC2647Z-2+PIR Zone Controller MS/TP Bus Objects When Networked with a Supervisory Controller (Part 1 of 4)

Point Name Zone Controller Point (Type/Address)

Range

GUI Damper Position1 AI 1 0 to 100%

Cfg Zone MAC1, 2 AV 1 4 to 127

Cfg RTC MAC1, 3 AV 2 4 to 127

Cfg AO2 OA Lock Spt4 AV 3 -40.0°F/-40.0°C to122.0°F/50.0°C

Cfg BO5 OA Lock Spt4 AV 4 -40.0°F/-40.0°C to122.0°F/50.0°C

Cfg Damper Min Pos4 AV 5 0 to 100%

Cfg Damper Max Pos4 AV 6 0 to 100%

Cfg Damper Max Heat Pos4 AV 7 0 to 100%

Cfg Heating Spt Limit4 AV 8 40.0°F/4.5°C to90.0°F/32.0°C

Cfg Cooling Spt Limit4 AV 9 54.0°F/12.0°C to100.0°F/37.5°C

Cfg Deadband4 AV 10 2.0F°/1.0C° to5.0F°/2.5C°

GUI Occupied Heat Spt4 AV 11 40.0°F/4.5°C to90.0°F/32.0°C

Table 22: Zone Controller Number ( _____ )1 Commissioning (Part 2 of 2)


59

t Open)losed)

A)A)

N.O.)N.C.)

GUI Occupied Cool Spt4 AV 12 54.0°F/12.0°C to100.0°F/37.5°C

GUI Unoccupied Heat Spt4 AV 13 40.0°F/4.5°C to90.0°F/32.0°C

GUI Unoccupied Cool Spt4 AV 14 54.0°F/12.0°C to100.0°F/37.5°C

GUI Standby Heat Spt4 AV 15 40.0°F/4.5°C to90.0°F/32.0°C

GUI Standby Cool Spt4 AV 16 54.0°F/12.0°C to100.0°F/37.5°C

GUI AO2 Status1 AV 17 0 to 100%

GUI UI3 Status1 AV 18 -40.0°F/-40.0°C to120.0°F/49.0°C

GUI PI Heat Weighted Demand1 AV 19 0 to 100%

GUI PI Cool Weighted Demand1 AV 20 0 to 100%

GUI Room Temperature5 AV 21 -40.0°F/-40.0°C to120.0°F/49.0°C

GUI Outdoor Temperature4 AV 22 -40.0°F/-40.0°C to150.0°F/65.5°C

Cfg Device Instance1 AV 23 0 to 4,194,302

GUI BI1 Status1, 6 BI 1 Inactive Text = Inactive (ContacActive Text = Active (Contact C

GUI BI2 Status1, 6 BI 2 Inactive Text: InactiveActive Text: Active

Cfg Temperature Scale4 BV 1 Inactive Text = °CActive Text = °F

Cfg Menu Scroll4 BV 2 Inactive Text = No ScrollActive Text = Scroll Active

Cfg Motion Detector Function4 BV 3 Inactive Text = DisabledActive Text = Enabled

Cfg AO2 RA/DA4 BV 4 Inactive Text = Direct Acting (DActive Text = Reverse Acting (R

Cfg BO5 Time Base4 BV 5 Inactive Text = 15 MinutesActive Text = 10 Seconds

Cfg BO5 Configuration4 BV 6 Inactive Text = Normally Open (Active Text = Normally Closed (

GUI BO5 Status1 BV 7 Inactive Text = OffActive Text = On

Sta AO2 Lock Status1 BV 8 Inactive Text = InactiveActive Text = Active

Sta BO5 Lock Status1 BV 9 Inactive Text = InactiveActive Text = Active

GUI Room Temp Override4 BV 10 Inactive Text = NormalActive Text = Override

Sta RTC Smart Recovery7 BV 11 Inactive Text = OffActive Text = On



Range


60

nly

rvisory System)Allows Each dently)ontroller

he Zoning

Cfg Zone Baud1 MV 1 1 = 96002 = 192003 = 384004 = 768005 = Auto

Cfg Reheat Configuration4 MV 2 1 = None2 = Analog Duct Reheat Only3 = On/Off Duct Reheat Only4 = On/Off Peripheral Reheat O5 = Analog Duct Reheat andOn/Off Peripheral Reheat

Cfg BI1 Configuration4 MV 3 1 = None2 = Motion N.O.3 = Motion N.C.

Cfg PI Heat Weight4 MV 4 1 = 0%2 = 25%3 = 50%4 = 75%5 = 100%

Cfg PI Cool Weight4 MV 5 1 = 0%2 = 25%3 = 50%4 = 75%5 = 100%

Cfg Temporary Occupancy Time1 MV 6 1 = 0 Hours2 = 1 Hour3 = 2 Hours4 = 3 Hours5 = 4 Hours6 = 5 Hours7 = 6 Hours8 = 7 Hours9 = 8 Hours10 = 9 Hours11 = 10 Hours12 = 11 Hours13 = 12 Hours

Cfg Network Handle4 MV 7 1 = Default Zone Handle (SupeController Monitors the Zoning 2 = Default Minus Occupancy (Zone to be Scheduled Indepen3 = Full Release (Supervisory CAssumes Complete Control of tSystem)

GUI Zone Keypad Lockout4 MV 8 1 = No Lockout2 = Level 13 = Level 24 = Level 3

GUI Occupancy8 MV 9 1 = Released2 = Occupied3 = Unoccupied4 = Temporary Occupied

Sta RTC Zone Sequencing7 MV 10 1 = Cool2 = Heat



Range


61

twork.etwork.

ride, then it is

is readable

ancy or

bject_Name.

Static Point Setting

TEC2664Z-2 Rooftop Controller

GUI Effective Occupancy1 MV 11 1 = Occupied2 = Unoccupied3 = Temporary Occupied4 = Standby

TEC2647Z-72aaa9, 10 Device 72aaa N/A

1. This MS/TP Bus object is readable only.2. Cfg Zone MAC is the unique device address of the zone controller (from 004 to 127) on the MS/TP ne3. Cfg RTC MAC is the unique device address of the rooftop controller (from 004 to 127) on the MS/TP n4. This MS/TP Bus object is readable and writable.5. This MS/TP Bus object is readable only unless GUI Room Temp Override is set to Active Text = Over

readable and writable.6. The polarity property of this MS/TP Bus object is readable and writable.7. This MS/TP Bus object is readable only unless Cfg Network Handle is set to 3 = Full Release, then it

and writable. This MS/TP Bus object enables the occupancy setpoint at the occupied time.8. This MS/TP Bus object is readable only unless Cfg Network Handle is set to 2 = Default Minus Occup

3 = Full Release, then it is readable and writable.9. The designation aaa is the address of the device (from 004 to 127) on the MS/TP network.10. In the Device Object, the following properties are writable: Device Object Instance, Max_Master, and O

Table 24: TEC2664Z-2 Rooftop Controller MS/TP Bus Objects When Networked with a Supervisory Controller (Part 1 of 4)

Point Name Rooftop Controller Point (Type/Address)

Range

GUI Discharge Air Temp1 AI 1 -40.0°F/-40.0°C to150.0°F/65.5°C

GUI Return Air Temp1 AI 2 -40.0°F/-40.0°C to150.0°F/65.5°C

GUI Static Pressure1 AI 3 Variable Depending on the CfgPressure Transducer Range

GUI Bypass Damper1 AI 4 0 to 100%

Cfg RTC MAC2, 3 AV 1 4 to 127

Cfg Heating Lockout Temp2 AV 2 -15.0°F/-26.0°C to120.0°F/49.0°C

Cfg Cooling Lockout Temp2 AV 3 -40.0°F/-40.0°C to95.0°F/35.0°C

Cfg Static Pressure Spt2 AV 4 0 in. W.C./0 Pa to2 in. W.C./500 Pa

Cfg Discharge High Limit Spt2 AV 5 75.0°F/24.0°C to150.0°F/65.5°C

Cfg Discharge Low Limit Spt2 AV 6 35.0°F/2.0°C to60.0°F/15.5°C

Cfg Return Air Occ CL Spt2 AV 7 54.0°F/12.0°C to100.0°F/37.5°C

Cfg Return Air Unocc CL Spt2 AV 8 54.0°F/12.0°C to100.0°F/37.5°C

Cfg Return Air Occ HT Spt2 AV 9 40.0°F/4.5°C to90.0°F/32.0°C



Range


62

ct Open)losed)

Cfg Return Air Unocc HT Spt2 AV 10 40.0°F/4.5°C to90.0°F/32.0°C

GUI Current Zone PI Heat Demand1 AV 11 0 to 100%

GUI Current Zone PI Cool Demand1 AV 12 0 to 100%

GUI Transferred PI Heat Demand1 AV 13 0 to 100%

GUI Transferred PI Cool Demand1 AV 14 0 to 100%

GUI Highest PI Heat Zone1 AV 15 4 to 127

GUI Highest PI Cool Zone1 AV 16 4 to 127

GUI Highest PI Heat Demand1 AV 17 0 to 100%

GUI Highest PI Cool Demand1 AV 18 0 to 100%

GUI Outdoor Temperature1 AV 19 -40.0°F/-40.0°C to150.0°F/65.5°C

Cfg Power Delay2 AV 20 10 to 120 Seconds

Cfg Device Instance1 AV 21 0 to 4,194,302

GUI G Fan1 BI 1 Inactive Text = OffActive Text = On

GUI Y1 Cool1 BI 2 Inactive Text = OffActive Text = On

GUI Y2 Cool1 BI 3 Inactive Text = OffActive Text = On

GUI W1 Heat1 BI 4 Inactive Text = OffActive Text = On

GUI W2 Heat1 BI 5 Inactive Text = OffActive Text = On

GUI DI1 Status1 BI 6 Inactive Text = Inactive (ContaActive Text = Active (Contact C

GUI Aux Status1 BI 7 Inactive Text = OffActive Text = On

Sta Heating Stages Lockout Status1 BI 8 Inactive Text = InactiveActive Text = Active

Sta Cooling Stages Lockout Status1 BI 9 Inactive Text = InactiveActive Text = Active

Sta Service Alarm1 BI 10 Inactive Text = OffActive Text = On

Sta Filter Alarm1 BI 11 Inactive Text = OffActive Text = On

Sta Clock Alarm1 BI 12 Inactive Text = OffActive Text = On

Sta Discharge Temp Alarm1 BI 13 Inactive Text = OffActive Text = On

Cfg Units2 BV 1 Inactive Text = Metric UnitsActive Text = Imperial Units

Cfg Progressive Recovery2 BV 2 Inactive Text = OffActive Text = On



Range


63

(N.O.) (N.C.)

.C./375 Pa./500 Pa./750 Pa./1,000 Pa./1,250 Pa

Sta Comm Lost Status1 BV 3 Inactive Text = DownActive Text = Up

Cfg Aux Contact2 BV 4 Inactive Text = Normally OpenActive Text = Normally Closed

Cfg Fan Purge Delay2 BV 5 Inactive Text = OffActive Text = On

GUI Outdoor Temp Override2 BV 6 Inactive Text = NormalActive Text = Override

Sta Smart Recovery1 BV 7 Inactive Text = OffActive Text = On

Cfg RTC Baud1 MV 1 1 = 96002 =192003 = 384004 = 768005 = Auto

Cfg Control Type2 MV 2 1 = Highest2 = AV_H33 = AV_H5

Cfg Local Keypad Lockout2 MV 3 1 = No Lockout2 = Level 13 = Level 2

GUI Zone Sequence1 MV 4 1 = Off2 = Cool3 = Heat

Cfg Static Pressure Transducer Range2

MV 5 1 = 0 in. W.C./0 Pa to 1.5 in. W2 = 0 in. W.C./0 Pa to 2 in. W.C3 = 0 in. W.C./0 Pa to 3 in. W.C4 = 0 in. W.C./0 Pa to 4 in. W.C5 = 0 in. W.C./0 Pa to 5 in. W.C

Cfg Heating Stages2 MV 6 1 = One Stage2 = Two Stages

Cfg Cooling Stages2 MV 7 1 = One Stage2 = Two Stages

Cfg Heating cph2 MV 8 1 = 3 cph2 = 4 cph3 = 5 cph4 = 6 cph5 = 7 cph6 = 8 cph

Cfg Cooling cph2 MV 9 1 = 3 cph2 = 4 cph

Cfg Minimum On/Off Time2 MV 10 1 = 0 Minutes2 = 1 Minute3 = 2 Minutes4 = 3 Minutes5 = 4 Minutes6 = 5 Minutes

Cfg BI 1 Configuration2 MV 11 1 = None2 = RemNSB3 = Override4 = Filter5 = Service



Range


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etwork.

bject_Name.

MS/TP Device Mapping into an NAE

PreparationBefore mapping a zone controller or a rooftop controller into an NAE:

1. Decide which point objects within the zone controller and rooftop controller need to be mapped. Only map the point objects that need to be viewed on a regular basis, since excessive mapping lowers system performance. Suggested Graphical User Interface (GUI), Configuration (Cfg), and Status (Sta) point objects for mapping are included in Table 23 and Table 24. In addition, monitoring points may be mapped if they are used. Use the Engineering view to examine infrequently used point objects.

Cfg Temporary Occupancy Time2 MV 12 1 = 0 Hours2 = 1 Hour3 = 2 Hours4 = 3 Hours5 = 4 Hours6 = 5 Hours7 = 6 Hours8 = 7 Hours9 = 8 Hours10 = 9 Hours11 = 10 Hours12 = 11 Hours13 = 12 Hours

Cfg Event Display2 MV 13 1 = Two Events2 = Four Events

GUI Occupancy2, 4 MV 14 1 = Released2 = Occupied 3 = Unoccupied4 = Temporary Occupied

GUI System Mode2 MV 15 1 = Off2 = Auto

GUI Schedule1 SCH1 N/A

TEC2664Z-76aaa5, 6 Device 76aaa N/A

1. This MS/TP Bus object is readable only.2. This MS/TP Bus object is readable and writable.3. Cfg RTC MAC is the unique device address of the rooftop controller (from 004 to 127) on the MS/TP n4. The Schedule Object is not writable from any controller.5. The designation aaa is the address of the device (from 004 to 127) on the MS/TP network.6. In the Device Object, the following properties are writable: Device Object Instance, Max_Master, and O



Range


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Note: We recommend that all zone controller and rooftop controller configuration parameters be set as desired prior to mapping the objects into the controller. If any zone controller or rooftop controller configuration parameters are altered after the objects are mapped into the controller, we recommend that all objects be remapped. We also recommend caution when mapping configuration parameters, as they should only be mapped if the operator is fully familiar with their use.

2. Verify that a Field Bus is defined in the NAE. BACnet MS/TP devices attach to a Field Bus. Refer to the BACnet® MS/TP Integration with NAE Technical Bulletin (LIT-12011013) for instructions on how to define a Field Bus.

3. For Metasys system software prior to Release 4.0, verify that a BACnet Integration is defined for the Field Bus. The zone controller and rooftop controller are mapped as BACnet devices under a Field Bus BACnet Integration. Refer to the BACnet Controller Integration with NAE/NCE Technical Bulletin (LIT-1201531) for instructions on how to define a BACnet Integration.

Note: For Metasys system Release 4.0 or later software, this step is not required.

At this point, the zone controller and rooftop controller (and the required point objects inside the zone controller and rooftop controller) can be mapped.

Adding a Zone ControllerThe zone controller must be added before its points can be mapped. To do this, select the Field Bus or a folder under it (refresh the tree view, if required, to see a newly added BACnet Integration) and choose Field Device from the Insert menu.

Note: For Metasys system software prior to Release 4.0, select the BACnet Integration under the Field Bus (refresh the tree view, if required, to see a newly added BACnet Integration) and choose Field Device from the Insert menu.

Assisted Definition using Auto Discovery is the easiest way to add a new zone controller online; however, this requires that the zone controller to be added is connected and ready to communicate.

Device object names used with BACnet communication must be unique to fully satisfy the requirements of BACnet MS/TP network guidelines. The zone controller automatically selects a device object name for itself using the format TEC2647Z-72aaa, where aaa designates the device address selected (from 004 to 127) on the MS/TP network. If this name needs to be changed by writing a new one into the zone controller device object, that should be done before any point objects are mapped. Be sure that the name of the new zone controller being added to the NAE matches that of the zone controller itself.


66

Device object instances used with BACnet communication must be unique to fully satisfy the requirements of BACnet MS/TP network guidelines. The zone controller automatically selects a device object instance for itself using the format 72aaa, where aaa designates the device address selected (from 004 to 127) on the MS/TP network (for example, 72004, 72005). If you need to change this instance by writing a new one into the zone controller device object, do so before any point objects are mapped. This number goes into the Instance Number field, Network section, Hardware tab, of the Configure step in the Insert Field Device Wizard.

Adding a Rooftop ControllerThe rooftop controller must be added before its points can be mapped. To do this, select the Field Bus or a folder under it (refresh the tree view if required to see a newly added BACnet Integration) and choose Field Device from the Insert menu.

Note: For Metasys system software prior to Release 4.0, select the BACnet Integration under the Field Bus (refresh the tree view if required to see a newly added BACnet Integration) and choose Field Device from the Insert menu.

Assisted Definition using Auto Discovery is the easiest way to add a new rooftop controller online; however, this requires that the rooftop controller to be added is connected and ready to communicate.

Device object names used with BACnet communication must be unique to fully satisfy the requirements of BACnet MS/TP network guidelines. The rooftop controller automatically selects a device object name for itself using the format TEC2664Z-76aaa, where aaa designates the device address selected (from 004 to 127) on the MS/TP network. If you need to change this name by writing a new one into the rooftop controller device object, do so before any point objects are mapped. Be sure that the name of the new rooftop controller being added to the NAE matches that of the rooftop controller itself.

Device object IDs used with BACnet communication must be unique to fully satisfy the requirements of BACnet MS/TP network guidelines. The rooftop controller automatically selects a device object ID for itself using the format 76aaa, where aaa designates the device address selected (from 004 to 127) on the MS/TP network (for example, 76004, 76005). If you need to change this ID by writing a new one into the rooftop controller device object, do so before any point objects are mapped. Be sure that the ID of the new rooftop controller being added to the NAE matches that of the rooftop controller itself. This number goes into the Instance Number field, Network section, Hardware tab, of the Configure step in the Insert Field Device Wizard.


67

Adding Point ObjectsThe required point objects must be mapped under the zone controller or rooftop controller device. To accomplish this, select the zone controller or rooftop controller device under the BACnet Integration (refresh the tree view, if required, to see a newly added zone controller or rooftop controller device), and choose Field Point from the Insert menu.

Note: For Metasys system Release 4.0 or later software, select a Field Bus or a folder under it.

Assisted Definition using Auto Discovery is the easiest way to add new point objects online; however, this requires that the zone controller or rooftop controller to be mapped is connected and ready to communicate.

When mapping point objects, the point type must match the BACnet object type (for example, AV, MV, or BI), and the point instance number must match the point BACnet instance number.

Notes, Tips, and Things to Know

Multiple 24 VAC Zone Controller Transformers versus a Single 24 VAC Zone Controller Transformer

If multiple 24 VAC zone controller transformers are used (one transformer for each zone controller), be certain of the following:

• Use a 20 VA or more Class 2 self-protected transformer to power all of the components connected to each zone controller.

• Respect the polarity of all of the components in the circuit, including the analog VAV actuator, analog reheat devices, or any other equipment.

• Ground the circuit if required. The common side of the circuit is connected to earth (0 V ~ Com). To prevent ground loops, grounding is required at only one location.

If a single 24 VAC zone controller transformer is used for multiple zones, be certain of the following:

• Size a fuse or circuit protection according to the maximum installed load if a Class 1 unprotected transformer is used to power all of the components connected to the zone controller. The load is not necessarily the same as the maximum current available from the transformer. For example, if a 100 VA transformer is installed and the maximum installed load is 45 VA for all of the components connected to the zone controller, then the fused value should be 2 A maximum at 24 VAC. In all instances, the power supplied to the zone controller must be Class 2.

• Respect the polarity of all of the components in the circuit, including the analog VAV actuator, analog reheat devices, or any other equipment.


68

• Ground the circuit if required. The common side of the circuit is connected to earth (0 V ~ Com). To prevent ground loops, grounding is required at only one location.

Critical Point ChecksFor proper and reliable control system operation, the system designer and/or installer must verify and check all critical milestones of the installation. These checks should include all other contractual aspects for the system performed outside of the control system scope of work, including:

• design-phase tasks such as load calculations, ductwork layout and sizing, and equipment selection

• construction-phase tasks such as rooftop controller installation, ductwork installation, and required electrical work

• commissioning/delivery-phase tasks such as system operational checkout, damper balancing, and rooftop controller commissioning

Proper planning and design plays a critical role in getting an installation up and running in an efficient manner, with fewer service calls during the initial occupancy period.

Balancing and CapacityAlthough it is not the function of the TEC Zoning Control System to correct for a wrong initial mechanical layout and associated load calculations, the control system does dramatically help deliver the load required by the voting zones. This is accomplished by appropriately distributing the total available capacity of the installed equipment to the required voting zones. If the equipment is undersized for the peak load, the control system distributes the available capacity according to the priorities requested to improve the comfort level of the majority of zones.

At the zone controller level, the Min Pos, Max Pos, and MaxHTPos parameters must be properly set during zone damper balancing. If the local VAV trunk is equipped with a main trunk-side takeoff directional adjustment blade, additional adjustments are also required.

Occupancy OperationUsers are able to override the entire occupancy status of the TEC Zoning Control System from the rooftop controller. When keypad lockout Level 0 or Level 1 is enabled and the user presses the Override key, the occupancy object of the rooftop controller changes to Temporary Occupied. All associated zone controllers with their network handle set to Default Zone Handle also have their occupancy object change to Temporary Occupied.


69

resses.

Occupancy ScheduleWhen viewing the rooftop controller schedule from the FX User Interface, the screen may initially appear as scrambled. If this condition occurs, simply click the left mouse button and the screen refreshes properly. It may be necessary to assign text to the states of the schedule. If this is the case, assign Ordinal 2 to Occupied and Ordinal 3 to Unoccupied via the Facets button of the Property Sheet.

For proper display when viewing the rooftop controller schedule from the NAE User Interface, check that the schedule for each day does not have identical Occupied and Unoccupied times. For example, a day that has both the Occupied and Unoccupied times scheduled for 12:00 A.M. does not display correctly. If the states of the displayed schedule do not show as Occupied and Unoccupied, it may be necessary to edit the states text and/or default schedule command. It may take a few minutes for the revised schedule to display at the NAE User Interface, following schedule updates at the rooftop controller.

Scheduled commands that cross over midnight may show a gray background for the next day. This gray background represents the continuation of the command that existed prior to midnight.

NAE Engineering ViewWhen viewing summary data for a rooftop controller or a zone controller via the Engineering view, some or all of the following device properties may be omitted from the display:

• Max Master

• Max Info Frames

• Device Addr Binding

• Database Revision

• Protocol Revision

Troubleshooting a TEC Zoning Control System

Table 25: Troubleshooting Details1 (Part 1 of 5)Symptom Probable Cause SolutionLoss of Control or Poor Control at Multiple Zones

Duplicate Media Access Control (MAC) Addresses Are Interrupting Communications

Check all devices on the network for unique MAC add

Wiring Errors Are Interrupting Communications

Check connections and continuity.


70

AC address

that the peatedly

rs to be out of

ostat circuit

talled

MAC address

r.

ly the rooftop ecific baud

e same baud

damper.

ftop controller.

g stages.

ftop controller

to restrict

supervisory

m design.

urn air

ftop controller

Loss of Control or Poor Control at Multiple Zones

Zone Controllers Are Disconnected or Offline

Cycle the power on the zone controllers (in case the Mwas changed without a reset).

Remove the cover of the zone controllers and observegreen LED on the communication module is flashing re(short-short-long). If the communication module appeaservice:• check that it is properly attached to the main therm

board• check that the communication cable is properly ins

Rooftop Controllers Are Disconnected or Offline

Cycle the power on the rooftop controllers (in case the was changed without a reset).

Check for the Comm Lost alarm at the rooftop controlle

All Units on the Network Are Set to Auto Baud

Select one MS/TP master unit on the network (preferabcontroller or a supervisory controller) to operate at a sprate.

One or More Units on the Network Are Set to Specific but Conflicting Baud Rates

Check that all of the units not set to Auto Baud have thrate selected.

Improper Rooftop Controller Parameters

Review all parameters against the system design.

Insufficient Airflow from the Rooftop Unit

Check the installation and configuration of the bypass

Check the static pressure setpoint and transducer.

Check the fan control wiring.

Check for the proper fan delay configuration at the roo

Check for a fan malfunction.

Rooftop Unit Heating/Cooling Stage Malfunction

Check for proper operation of all rooftop heating/coolin

Check for proper number and sizing of the stages.

Check all wiring.

Check the discharge air lockout temperature.

Check the discharge air sensor.

Check for the proper anti-cycle configuration at the rooand other equipment.

Inappropriate Modification of the Rooftop Controller or Zone Controller Configuration by the Supervisory Controller

Set the password access at the supervisory controller access to authorized personnel.

Do not map sensitive configuration parameters into thecontroller.

Inappropriate Modification of the Rooftop Controller or Zone Controller by an Unauthorized User

Review the configuration parameters against the syste

Alternate Control Scheme is Active with Faulty or Missing Input (Active when the Rooftop Controller Loses All Communications)

Replace or repair the missing, inaccurate, or wrong retsensor.

Fix and/or relocate the inaccurate or poorly placed roointegral temperature sensor.

Alternate Control Scheme is Active with Inappropriate Setpoints

Check and reenter the setpoints if needed.

Table 25: Troubleshooting Details1 (Part 2 of 5)Symptom Probable Cause Solution


71

desired, and properly

mit

esired, ir sensor, and rameters.

e desired

e desired

e desired

ddress in the

AC address

that the peatedly

rs to be out of

ostat circuit

talled

aximum

one (for ostly in

e sensor.

example, no

e.

the zone

r.

Loss of Control or Poor Control at Multiple Zones

Inappropriate Discharge Air Sensor Configuration

If heating/cooling lockout based on the discharge air isproperly install a rooftop controller discharge air sensorset the discharge air low-limit and discharge air high-liparameters.

Inappropriate Outside Air Sensor Configuration

It heating/cooling lockout based on the outside air is dproperly install an outside air temperature discharge aproperly set the cooling lockout and heating lockout pa

Loss of Control or Poor Control at a Single Zone

Zone Controller MAC Address (Associated with the Rooftop Controller) Is not Changed from Its Default

Confirm that each zone controller is associated with throoftop controller.

Zone Controller MAC Address (Associated with the Rooftop Controller) Is Set to No Device or Non-Rooftop Controller Device


Zone Controller MAC Address (Associated with the Rooftop Controller) Is Set to the Incorrect Rooftop Controller


Zone Controller MAC Address Is Set in the Range of 128 through 254

Confirm that each zone controller has a unique MAC arange of 4 through 127.

Zone Controllers Are Disconnected or Offline

Cycle the power on the zone controllers (in case the Mwas changed without a reset).

Remove the cover of the zone controllers and observegreen LED on the communication module is flashing re(short-short-long). If the communication module appeaservice:• check that it is properly attached to the main therm

board• check that the communication cable is properly ins

Zone Controller Damper Malfunction

Check the damper installation.

Check the damper minimum position and the damper mposition parameters.

Incorrect Zone Sequence for the Zone Demand

Check if the zone is paired with a drastically different zexample, one zone mostly paired with another zone mshade).

Check the PI weighting of the zone.

Check for a faulty zone sensor or poor placement of th

Check for proper placement of the zone controller (for holes in the wall or not placed in the air stream).

Insufficient (or Missing) Reheat

Check that the specified reheat is sufficient for the zon

Incorrectly Installed or Configured Reheat

Check the configuration for installed reheat.

Check the AO2 OALK and BO5 OALK parameters oncontroller.

Check the wiring.

Check the MaxHTPos parameter on the zone controlle



72

m design.

ntroller, ne controller

s for the zone.

if local

etpoints ting from the

if global

consider the sequence.

nd the motion

setback.

.rvisory menu.

e desired

Loss of Control or Poor Control at a Single Zone

Improper Zone Controller Configuration Parameters

Review the configuration parameters against the syste

If Get From service was used to configure the zone coconfirm that configuration parameters of the source zoare correct.

PI Weighting Is Incorrect Evaluate the heating and cooling weighting parameter

Cannot Modify the Occupied Setpoints at the Zone Controller Keypad

Lockout Is Set to 3 Change the lockout level to either 0, 1, or 2.

No Response (or Inadequate Response) to the Zone Controller Occupancy Override

Wrong Override Strategy Is Configured

Check that the zone controller lockout level is set to 1 override is desired.Note: Local override attempts to reach the occupied s

without requesting any additional cooling or hearooftop controller.

Check that the zone controller lockout level is set to 0 override is desired.Note: Global override causes the rooftop controller to

demand of the zone when determining the zone

Zone Standby Setpoints Are Not Used When Expected

The PIR Func Parameter Is Not Configured Properly or the PIR Device Is Not Installed Properly

Configure the PIR Func parameter properly.

Install the PIR device properly.

The BI1 Parameter Is Not Configured Properly or the Motion Detector Is Not Installed Properly

Check that the PIR Func parameter is set to off.

Check that the BI1 parameter is configured properly.

Install the motion detector properly.

Zone Continues to Use Standby Setpoints When the Zone Is Occupied

The PIR Device or the Motion Detector Is Not Installed or Functioning Properly

Check the installation and function of the PIR device adetector.

Cannot Access the Occupancy Schedule at the Rooftop Controller Keypad

Lockout Is Set to 2 Change the lockout level to 0.

Verify that the DI1 parameter is not set to remote night

Cannot Change the System Mode at the Rooftop Controller Keypad

Lockout Is Set to 1 or 2 Change the lockout level to 0.

Zones Are Not Following the Rooftop Controller Occupancy Schedule

Wrong Network Handle Is Written to the Zone Controller

Write the correct network handle to the zone controllerNote: The network handle is only written via the supecontroller; not the zone controller installer configuration


Cannot Start or Cancel the System Occupancy at the Rooftop Controller Keypad

Lockout Is Set to 2 Change the lockout level to 0 or 1.



73

.controller, not

90 minutes.ust be in the

he oling setpoint

g progressive ation is lost,

aintain the heating nd that the

ed cooling

of the rooftop

rate is

ulletin

Zones Are Not Following the Supervisory Controller Occupancy Schedule

Wrong Network Handle Is Written to the Zone Controller

Write the correct network handle to the zone controllerThe network handle is only written via the supervisory the zone controller installer configuration menu.

No Progressive Recovery

Progressive Recovery Is Not Functioning

Check that the Prog rec parameter is set to on.

Check if the gap between schedule events is less thanNote: If progressive recovery is desired, the system m

unoccupied mode for more than 90 minutes.

Check that the occupied heating setpoint is less than tunoccupied heating setpoint, and that the occupied cois greater than the unoccupied cooling setpoint.

Check if the rooftop controller is offline and is attemptinrecovery using return air control. If network communicthe return air sensor controls the rooftop controller to mheating and cooling setpoints. Check that the occupiedsetpoint is less than the unoccupied heating setpoint, aoccupied cooling setpoint is greater than the unoccupisetpoint.

Supervisory Controller Cannot Control

--- Check the wiring.

Check for failure of auto discovery or manual definitioncontrollers and zone controllers.

Check for incorrect network handle.

Not All Configuration Parameters Are Visible at the Zone Controller

The Get From Parameter Is Set to a Value Other Than 255

Change the Get From parameter to 255, until a baud established on the network.

1. For common MS/TP troubleshooting information, refer to the MS/TP Communications Bus Technical B(LIT-12011034).


Published in U.S.A. www.johnsoncontrols.com


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Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc.All other marks herein are the marks of their respective owners. © 2009 Johnson Controls, Inc.

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