Light Commercial Heat Recovery Ventilators and Energy ... · near or in blowers, dampers, heat exchangers, etc. Once installation is complete, check all modes of operation to ensure

Light Commercial

Heat Recovery Ventilators and

Energy Recovery Ventilators

Installation, Operationand Service Instructions

VB0002VB0003

VB0001

22638 rev. 03

B6LC B1600705

B12LC

2

Table of Contents

1. Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 2.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2.2 Mounting Location Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2.3 Mounting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2.4 Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2.5 Internal Grilles and diffusers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2.6 Exterior Hoods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2.7 Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2.8 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3. Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 3.1 General Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 3.2 Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 3.3 Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 3.4 Remote Wall Control (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

4. Airflow Measurements and Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55. Maintenance and Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 5.1 Bi-Monthly Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 5.2 Annual Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

6. Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9 6.1 B6LC-B12LC Exhaust Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 6.2 6LC-12LC Recirculation Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 6.3 B1600705 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Appendix A - Mounting Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11

Appendix B - Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16

Appendix C - Balancing Dampers Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Appendix D - Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Appendix E - Terminal Control Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-20

Appendix F - Control Box Assembly B6LC and B12LC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Appendix G - Make-up Heat Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-22

Appendix H - Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-27

Appendix I - Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

1. Safety Considerations

Hazards may exist within this equipment because it contains electrical and powerful moving components.

Only qualified service personnel should install or service this equipment. Untrained personnel can perform basic maintenance such as maintaining filters.

Observe precautions marked in literature and on labels attached to unit. Follow all safety codes.

WARNING!

Disconnect main power switches to unit before performing service or maintenance. Electric shock can cause

personal injury or death.

3

2. Installation

2.1 InspectionInspect the exterior of the unit for shipping damage by ensuring that there is no damage to the door, door latches, door hinges, damper, duct collars, cabinet, etc. Inspect the interior of the unit for damage by ensuring that the fan motors and housings, heat or energy recovery cores, insulation, dampers, actuators and drain pans are all intact.

If transportation damage is found, file a claim immediately with the transportation agency. Remove all packaging, tape, etc. from the cabinet.

2.2 Mounting Location RequirementsWhen determining an installation location, the unit must be mounted in a heated area to prevent condensate drain lines from freezing. The mounting location should be away from occupied areas to provide quiet operation. The area should also be easily accessible for maintenance.

NOTE:

These units have minimum clearance requirements when mounting. See Appendix B for specific clearance requirements. Mounting options must allow 12” clearance in front of control cover for access.

A mounting location close to an exterior partition will minimize the length of insulated duct. The unit should be close to a drain and 120 volt, 60 Hz power supply. The unit should be mounted away from hot chimneys, electrical panels and other hazards.

2.3 Mounting OptionsThere are several options for hanging or floor mounting the unit.

NOTE:

In all cases, the unit must be level. Consult local building code for restrictions in your area regarding installation.

Hang the unit with the reinforced rubber straps provided as shown in Appendix A. Check with local building codes regarding the use of rubber straps in commercial buildings. Attach the straps to the unit with two no. 8 screws provided. Then attach the other end of the strap to the ceiling joists, trusses, custom frame, etc.

The unit can also be hung with 3/8” threaded rod and U channels or angles (not supplied) as shown in Appendix A.

When installing the unit, keep in mind that access to the control panel may be required. Supply and exhaust ducts to outdoors may have 1” to 2” of insulation on them. Rubber vibration isolation may be required and is recommended for quiet operation.

The unit can also be mounted on a metal or wooden curb (not supplied) bolted to the floor as shown in Appendix A. Space must be left under the unit to allow connection of drain lines. A gradual slope is required for the condensate water to drain by gravity (minimum 1/4”/foot). If this is not possible, a pump should be used. If attachment of the unit to the curb is required, ensure that screws, bolts and mounting hardware do not interfere with moving parts or that the integrity of the cabinet insulation is not affected.

2.4 DuctworkThe supply and exhaust duct connections on the unit are as follows:

UNIT DUCT SIZE

B6LC, B12LC 14” x 8” (356 mm x 203 mm)

B1600705 20” x 8” (508 mm x 203 mm)

NOTE:

Duct sizes are for connection purposes only. Ducts should be sized to keep noise and pressure drop to a minimum.

The supply and exhaust ducts connected to outdoors, as well as any ducts passing through an unconditioned space, must have a minimum insulation value of R5. In addition, a continuous integral vapor barrier over the duct insulation must be used.

Air balancing dampers are recommended for both supply and exhaust ducts to allow for adjustment of airflow. Also, flexible canvasconnectors should be installed close to the unit in the supply duct to the building and the exhaust duct from the building to reduce noise transmission from the unit to the building, see Appendix C.

All ports on the B6LC and B12LC units have 1” flanges to facilitate the installation of the ductwork. Please note that the “Fresh Air from Outdoors” port has a defrost damper incorporated with it.

Ensure that any mechanical fasteners used to connect the duct do not interfere with the operation of the damper. Screws can be

installed on the side of the cabinet rather than the flange for

this port only. For port locations see Appendix B.

All ports on the B1600705 unit have 2” flanges to facilitate the installation of the ductwork. Please note the “Fresh Air From Outdoors” connection is factory set to be the left side upper port. It is possible to reverse the operation of the defrost damper in order to use the port on top of the cabinet for “Fresh Air From Outdoors” connection.

To change the «Fresh Air From Outdoors» from the side to the top use the following directions. For port locations see Appendix B.

Remove the cover of the damper motor with a flat screwdriver. Reverse the ORANGE and RED wires by moving the ORANGE from terminal no. 2 to terminal no. 3 and moving the RED wire from terminal no. 3 to terminal no. 2. The end result in order to have the “Fresh Air From Outdoors” connection to the top port will be: no. 1 - WHITE, no. 2 - RED, no. 3 - ORANGE.

2.5 Internal Grilles and DiffusersLocate exhaust grilles and supply diffusers to provide effective ventilation and avoid short circuiting of airflows. Adjustable dampersshould be provided at every grille and diffuser location to make balancing of the system possible.

A proper selection of style and size of grilles and diffusers is required to minimize pressure drop. The velocity of the airflow should not exceed 400 ft./min. for normal applications.

The duct system should be designed according to the high speed flow rate of the unit. In order to keep the noise and pressure drop to a minimum, a maximum air velocity of 1100 ft/min. should be used in calculations in duct design. The duct runs should be kept as short as possible with the minimum amount of elbows and transitions.

The manufacturer recommends the use of smooth radius elbows or square elbows with turning vanes to achieve maximum performance.

WARNING!

It is recommended to wear safety glasses and gloves

while performing these instructions.

4

2. Installation (cont’d)

2.6 Exterior HoodsIt is important that the fresh air intake hood be positioned well away from any source of contamination. The exterior supply and exhaust hoods must be separated enough to prevent cross-contamination and at an elevation that will prevent blockage by snow, dirt and leaves.

NOTE:

Consult local building code for restrictions in your area.

A rodent screen with 1/4” mesh must be installed to prevent the intake of large debris and animals. A backdraft damper may need to be installed in the exhaust duct to prevent cold air entering the building if the unit is to be shut off for a long period of time.

To maintain optimum airflow performance, exterior hood selection must be such that the minimum free area of opening is 140 inches2.

2.7 DrainsThe drain fittings provided with the unit will accept a 3/4” NPT coupler(supplied by others). The drain line for the unit must be fabricated on-site and connected to the building main. A loop in the hose or trap in the copper or plastic pipe must be provided to prevent sewer gases from entering the unit when connecting to a drain as illustratedin Appendix D.

NOTE:

Consult local building code for plumbing requirements in your area. If copper pipe is to be used, ensure not to solder to the 3/4” coupler while it is attached to the plastic drain fitting as deformation may occur. Ensure adequate slope is present to allow good drainage(minimum 1/4” per foot).

2.8 Electrical ConnectionsPOWER

A terminal block and strain relief bushing or a junction box is provided for line voltage to make the necessary power connections.

The electrical requirements are as follows:

B6LC B1600705 B12LC

VOLTAGE 115 V 115 V 115 V

MCA 8.65 6.63 13.4

MOP 12.5 9.13 20

3. Controls

3.1 General InformationFAN INTERLOCK RELAY OUTPUT (FF)

External fan control can be achieved by connecting an external 24 volts fan control through dry contacts (FF). These contacts are closed on a call for ventilation or defrost. See wiring diagram shown in Appendix E.

SPEED SELECTION (6LC /12LC UNITS ONLY)

There are three speed settings available with the controls, only two of which can be functional at any one time. The units are factory set to use the low and high speed taps on the blower motors. If necessary, the medium speed tap can be used instead of the low speed tap. See wiring diagrams for instructions on how to make this change. Units without the remote wall control option can be shut off by opening the contact between LOW - COM or HIGH - COM as shown in Appendix E-2.

3.2 Sequence of OperationBefore start-up, check the unit for obstructive packaging, objects near or in blowers, dampers, heat exchangers, etc. Once installationis complete, check all modes of operation to ensure that the unit is working properly. Close the doors and check for operation on LOW, COM and HIGH. Use a wall control or the dry contact switching to run fan speeds as shown in Appendix E-2.

The B1600705 unit is two speed. Low speed can be initiated by creating a closure across LOW - COM or high speed can be initiatedby creating a closure across HIGH - COM.

UNIT CHECK POINTS (ALL UNITS):

• Power connected, no ventilation call - Both fans are off, defrost damper (if equipped) closes off fresh air from outdoors.

• Power connected, low speed call - Both fans on low speed internal defrost damper (if equipped) opens fresh air from outdoors. For B6LC and B12LC units only, if equipped with recirculation module, the internal defrost damper closes recirculation opening.

• Power connected, high speed call - Both fans on high speed, defrost damper opens fresh air from outside. For B6LC and B12LC units only, if equipped with recirculation module, the internal defrost damper closes recirculation opening.

• Power connected, occupied timer/sensor connection open (unoccupied mode) - Both fans are off, defrost damper closes fresh air from outdoors. For B6LC and B12LC units only, if equipped with recirculation module, the internal defrost damper opens recirculation opening.

• Power connected, FF control contacts close during unit ventilation or defrost cycle.

5

3. Controls (cont’d)

3.3 DefrostThe unit functions are controlled by integrated controls in the unit which may include Exhaust Only Defrost or Recirculation Defrost(via the recirculation module - B6LC and B12LC units only). In cold temperatures, defrost cycles will remove frost from the recovery cores to maintain good operation.

EXHAUST ONLY DEFROST (OPTIONAL)

Frost removal occurs when the supply blower de-energizes, the supply air damper and the core damper close and the exhaust fan continues to circulate only warm inside air through the heat recovery core to maintain ventilation. This process prevents the build up of ice in the core. Defrost is temperature initiated at 23°F to -22°F and time based.

RECIRCULATION DEFROST MODULE

(OPTIONAL - FACTORY INSTALLED)

The Recirculation Defrost Module is only available with the B6LC and B12LC units. The defrost cycle is electronically controlled in response to the outdoors temperature 23°F to -22°F. On a call for defrost, the supply air damper in the recirculation module closes, exhaust fan is de-energized and the supply fan continues to recirculate warm air through the heat recovery core or energy recovery core. It is possible to extend the defrost times during very cold weather by removing the jumper JU1-F on the circuit board as shown in Appendix F. For dimension and weight changes to the B6LC and B12LC models with recirculation defrost, see Appendix B-2 and B-4.

3.4 Remote Wall Control (Optional)Remote mounted wall control options can be used to control the ventilators from a location remote to the installed unit location. The connection from the ventilator to the control is low voltage and requires a 4 conductor (24 ga. minimum) LVT cable. Models are available with a dehumidistat control. The following two options are available.

SLIDE SWITCH TYPE

Dehumidistat to engage high speed exchange. Slide switch operation supporting continuous low exchange and continuous high exchange.

VT10W (FOR B1600705 UNIT ONLY)

Ideal for pool dehumidification. Dehumidistat to engage high speed exchange. Push-button operation supporting: intermittent (stand-by) ventilation, continuous low exchange, continuous high exchange, maintenance indicator light and exchange indicator light.

WARNING!

A negative building pressure may develop during the

defrost cycle with possible backdrafting fumes from

combustion equipment.

5. Maintenance and Service

5.1 Bi-Monthly Maintenance

Bi-monthly maintenance should include:

AIR FILTERS

The standard foam filters are washable. Under normal conditions it is recommended that they be cleaned every two months. More frequent cleaning may be required under extremely dirty operating conditions. Use a vacuum cleaner to remove the heaviest portion of accumulated dirt, then wash with warm water.

A medium efficiency filter for the supply air stream is available from your supplier. This filter is disposable and should be replaced when it becomes dirty.

B6LC and B12LC units

Washable foam filter MEF filter - optional

B1600705 unit

DRAIN PANS AND INTERIOR OF UNIT

With the filters removed from the unit, the foil faced insulation surfaces and the drain pans should be wiped clean with a soft cloth and mild cleaning solution. Also ensure that the drain fittings are free from dirt and are draining freely.

WARNING!

Disconnect power before maintaining unit.

1

1

2VL0001

1 or 2

1

VL0002A

4. Airflow Measurement and Balancing

Once installation is complete, the supply and exhaust airflows should be balanced. This will ensure proper operation and a good quality installation.

A well designed duct system with properly sized duct runs and equalstatic pressure losses of both the supply and exhaust will aid in balancingthe unit. However, it will be necessary to take flow measurementswith the proper equipment to ensure a balanced system.

Before proceeding with balancing, all windows, overhead doors and walk-in doors should be closed and exhaust systems should be turned off.

6

5. Maintenance and Service (cont’d)

5.2 Annual MaintenanceAnnual maintenance should include:

AIR FILTERS

Vacuum and wash standard foam filters. Replace medium efficiencyfilter if present.

DRAIN PANS AND INTERIOR OF UNIT

Wash the foil faced insulation surfaces and wipe the drain pans with a soft cloth and mild cleaning solution. Check the drain fittings to ensure they are draining freely.

HEAT RECOVERY CORE

The heat recovery core must be handled with care. It is recommended that it be washed once a year following the season of most intense use, in order to ensure maximum efficiency of the partitions.

Allow the heat recovery core to soak for three hours in warm water and mild soap. Rinse under a heavy stream of water.

ERV HM CORE

For ERV HM core, use a vacuum cleaner or low pressure air jet.It is not recommended to use solvents or detergents as these may damage the media or structure of the core.

FANS

Blower wheels and fan housing should be checked for dirt build-up.If they appear dirty, it may be necessary to remove the blower assembly and then vacuum the dust out through the fan mouth. See next column for instructions on removing the blower assembly.

SYSTEM OPERATION CHECK

Verification of all control modes should be checked to ensure properoperation. Refer to 3.2 Sequence of Operation section.

TESTING AND REPLACEMENT OF THE DAMPER ACTUATOR

Check damper operation by switching between LOW - COM or HIGH - COM on the dry contact terminal or by switching through the modes on the optional remote wall control. If the damper does not respond in one or both directions, check all connections.

7000 unit ONLY: Check for 24 volt output between the WHITE/REDand the WHITE/ORANGE wires at the damper motor. If 24 volts can be measured at the damper motor, the problem is either in the connections, the defrost relay or the main circuit board.

6LC/12LC units ONLY: (CAUTION: 120 VAC) Check for 120 volt output across the WHITE/BLACK wires. If 120 volts can be measuredat the motor, replace the motor. If 120 volts cannot be measured at the motor, check pins J1-9 at the printed circuit board.

MAIN CIRCUIT BOARD REPLACEMENT

The main circuit board must be replaced if an electronic problem arises.

WARNING!

Disconnect power before maintaining unit.

CAUTION

Hot water and a strong cleaning agent could damage

the polypropylene core. Ensure the core is reinstalled

in the unit in the correct orientation. Use the sticker as

a guide.

For example, the unit suddenly stops, the unit stays in defrostall of the time or if control functions are not working properly.

Ensure that power is reaching the board. Test the blower motors and damper actuators for operation when directly connected to the appropriate power voltage. If the motor and damper actuators functionnormally, replace the main circuit board.

MOTOR AND BLOWER REMOVAL AND INSTALLATION

Disconnect power from the unit. To determine if the fan motor is burned out, disconnect the four-wire service connector between the motor and cabinet. Connect the motor directly to a 115 volts power source with an electrical cable, as follows:

RED + WHITE Low speed

BLUE + WHITE Medium speed

BLACK + WHITE High speed

If the motor functions normally, there is a problem with the wiring connections or the main circuit board. Check all wiring and replace main circuit board if necessary.

If the blower does not run, it must be replaced. To replace the motor,remove the recovery core or energy recovery core from the unit. Disconnect the four-wire service connector from the unit. Remove the fasteners holding the motor assembly in place. Lift the assembly up and out, using one hand under the motor and one hand to steady it. Remove the assembly carefully from the unit to avoid damage to the insulation, shelf, etc. Install the repaired motor assembly by following these instructions in reverse.

B6LC and B12LC units

B1600705 unit

CAPACITOR

LOCKING PLATEREMOVE THESETWO SCREWS

VD0004A

SERVICE CONNECTOR

THUMBSCREW

VD0001A

CAUTION

Do not soak the ERV HM core in water. This core can

easely be damaged especially if it is soaked.

7

6. Service parts

6.1 B6LC-B12LC Exhaust Defrost

B

C D E

F

G

H

I

JK

M

L

N

VL0068

Ref. Part No. Description

B SV13036 Hinge kit (male-female)

CSV1808139 Core Defrost Actuator B6LC-B12LC

SV63341 Core Defrost Actuator B12LC, Powder Coated

D

SV63327 Core Damper B6LC

SV63328 Core Damper B12LC

SV63329 Core Damper B12LC, Powder Coated

E

SV201982 Fresh Air Damper B6LC

SV63330 Fresh Air Damper B12LC

SV63331 Fresh Air Damper B12LC, Powder Coated

FSV1808138 Fresh Air Damper Actuator B6LC-B12LC

SV63332 Fresh Air Damper Act. B12LC Powder Coated

G SV201805 Filter SWF 13.125" x 11.25" x 1" (unitary)

H

SV1808147 Core Poly B6LC-B12LC (unitary)

SV1604191 Core Aluminum B6LC-B12LC (unitary)

SV1607787 ERV HM Core B6LC-B12LC (unitary)

I SV16035 Door Latch-Keeper Kit

J SV1607456Drain Fitting B6LC, B12LC, B1600705 (unitary)

K SV63342 Filter Optional MEF B6LC, B12LC (unitary)


L *

SV1808130 PCB Electronic B6LC, B12LC, B1600705

SV202382 Thermistor B6LC, 1B2LC, B1600705

SV500025914Relay SPDT 120 VAC, 1 HP, 30 A @ 120 VAC, B6LC, B12LC

SV500025915Relay DPST 120 VAC, 1 HP, 30 A @ 120 VAC, B6LC, B12LC

M

SV1808144 Blower Ass’y B6LC


SV1808148P Blower Ass’y B12LC Powder Coated Option

SV1808142 Blower Wheel B6LC, B12LC (not shown)

SV1808149 Fan Motor B6LC (not shown)


SV63110 Capacitor 5 μF LC, B1600705 (not shown)

N SV208507Terminal Strip 10-Pin Molex 38721-6710, B6LC, B12LC

* SV63571 Door Assembly B6LC, B12LC

* SV63572Door Assembly B12LC (Powder Coated Option)

* SV1808145 Accessories kit B6LC, B12LC

* SV63344Hanger Strap 18" Kit B6LC, B12LC, B1600705

* Not Shown.

NOTE: C and D not available for ERV HM Core

NOTE 2: H 2 cores required for B6LC unit 3 cores required for B12LC unit

NOTE 3: G 4 filters for B6LC unit 6 filters for B12LC unitNOTE 4: K 2 filters for B6LC unit 3 filters for B12LC unit

8

6. Service parts (cont’d)

6.2 B6LC-B12LC Recirculation DefrostB

C

D

D E F

GIJ

H

K

L

M

VL0069


B SV13036 Hinge kit (male-female)

C

SV1808146 Core Poly UL B6LC-B12LC (unitary)

SV1604191 Core Aluminum B6LC-B12LC (unitary)

SV1607787 ERV HM Core B6LC-B12LC (unitary)

D SV201805 Filter SWF 13.125" x 11.25" x 1" (unitary)

E

SV63333 Recirculation Damper B6LC

SV63334 Recirculation Damper B12LC

SV63335 Recirculation Damper B12LC, Powder Coated

F SV225855Damper Motor Belimo LMB24-3-T, B1600705,B6LC-B12LC (Recirculation Defrost Option)

G *

SV066161 Fuse Holder B6LC, B12LC, B1600705

SV201603Terminal Strip 3-Pin Molex 38721-6703 B6LC, B12LC (Recirculation Defrost)

SV63352Relay DPDT 24 VAC, 1/2 HP, 15 A @ 120 VAC,B6LC, B12LC (Recirculation Defrost Option)

SV066176Fuse 0.25 A, 250 V Time Delay 1.25" MDL B6LC-B12LC (Recirculation Defrost Option)


SV64098 Transformer 120-24V 40VA

H SV16035 Door Latch-Keeper Kit

I SV1607456 Drain Fitting B6LC, B12LC, B1600705 (unitary)

J SV63342 Filter Optional MEF B6LC, B12LC (unitary)


K *


SV202382 Thermistor B6LC, B12LC, B1600705


SV500025915Relay DPST 120 VAC, 1 HP, 30 A @ 120 VAC, B6LC, B12LC

L



SV1808148P Blower Ass’y B12LC Powder Coated Opt.

SV1808142 Blower Wheel B6LC, B12LC (not shown)




M SV208507Terminal Strip 10-Pin Molex 38721-6710, B6LC, B12LC

* SV63571 Door Assembly B6LC, B12LC

* SV63572Door Assembly B12LC (Powder Coated Option)

* SV1808145 Accessories kit B6LC, B12LC


* SV64228 Backdraft damper B6LC recirculation

* SV64229 Backdraft damper B12LC recirculation

* Not Shown.

NOTE 1: C 2 cores required for B6LC unit 3 cores required for B12LC unit

NOTE 2: D 4 filters for B6LC unit 6 filters for B12LC unit

NOTE 3: J 2 filters for B6LC unit 3 filters for B12LC unit

* Not Shown.

9

6. Service parts (cont’d)

6.3 B1600705

B

DC

E

F

G

H

J I

K

VL0070

L


B SV16035 Door Latch-Keeper kit

C SV225855Damper Motor Belimo LMB24-3-T, B1600705, B6LC-B12LC (Recirculation Defrost Option)

D SV1604178 Fresh Air Damper

E

SV1604168 Blower Ass’y B1600705

SV1604177 Blower Wheel (not shown)

SV1604169 Fan Motor B1600705 (not shown)


F SV202790Terminal Strip 7-Pin Molex 38721-6707, B1600705

G *


SV202382 Thermistor B6LC, B12LC, B1600705

SV63117 Transformer B1600705

SV63345Relay DPDT 120 VAC, 1/2 HP, 15 A @ 120 VAC,B1600705, B6LC, B12LC

SV066161 Fuse Holder B6LC, B12LC, B1600705

SV066169Fuse 0.5 A, 250 V Time Delay 1.25" MDL B1600705

* Not Shown.


H SV13036 Hinge Kit (male-female)

I SV1604156 Core Poly B1600705

J SV1607456Drain Fitting B6LC, B12LC, B1600705 (unitary)

K SV134147Filter SWF 18.6" x 15.6" x 1" B1600705 Exhaust (unitary)

L SV134145Filter SWF 19" x 22.75" x 1" B1600705 Supply (unitary)

* SV1608701Optional MEF Filter B1600705 Supply (unitary)

* SV63573Door Ass’y B1600705 (Powder Coated Option)

* SV027123 Anti-vibration Bushing B1600705 (unitary)


10

Appendix A

MOUNTING DIAGRAMS

B6LC AND B12LC UNITS

Space must be left to allow connectionof drain lines with adequate slope for drainage

Wooden Curb (Supplied by others)

Bolt to Floor

Rubber Vibration Isolator(Supplied by others)

U Channel(Supplied by others)

3/8" (10mm)Threaded Rod(Supplied by others)

NOTE: Diagrams show standard unit configuration.For units with the reversed door option, thedoor will be located here.

ReinforcedRubber Strap

VD0002A

Recirculation Module(Factory Installed)



11

3/8" (10mm)Threaded Rod(Supplied by others)

Rubber VibrationIsolater

Cabinet MountedU Channel

Wooden Curb(Supplied by others)

Bolt to Floor

Space must be left to allowconnection of drain lines with adequate slope for drainageDry

Contacts

Dry Contacts

VD0003A

B1600705 UNIT

Appendix A

MOUNTING DIAGRAMS

12

Appendix B

UNIT DIMENSIONS

B-1: B6LC (WITHOUT RECIRCULATION MODULE)

4.00

0"

3.53

5"4.00

0"

28.0

05"

14.0

00"

5.85

9"

13.3

75"

23.5

00"

2.75

0"14

.000

"6.

500"

8.00

0"

8.00

0"

14.1

03"

7.70

5"

4.00

0"

24.5

00"

12.0

05"

4.02

8"

34.0

00"

19.2

07"

5.12

5"10

.005

"

12.0

00"

15.0

00"

EX

HA

US

T A

IRO

PE

NIN

G

SU

PP

LY A

IRO

PE

NIN

G

LIN

E P

OW

ER

EX

HA

US

T A

IRO

UT

DO

OR

AIR

RE

TU

RN

AIR

SU

PP

LY A

IR

A

B

LOW

VO

LTA

GE

TE

RM

INA

L S

TR

IPS

CO

NT

RO

L B

OX

AC

CE

SS

RE

VE

RS

E D

OO

RO

PT

ION

LEF

T S

IDE

CDB

A

TO

P

NO

TE

: FO

R U

NIT

S W

ITH

TH

E R

EV

ER

SE

D D

OO

R O

PT

ION

, IN

TE

RIO

R C

OM

PO

NE

NT

S W

ILL

AP

PE

AR

AS

A M

IRR

OR

IMA

GE

OF

TH

E A

BO

VE

DIA

GR

AM

.

FR

ON

T

ST

RA

P M

OU

NT

ING

LOC

AT

ION

OU

TD

OO

R A

IRO

PE

NIN

G

RE

TU

RN

AIR

OP

EN

ING

DR

AIN

LIN

E F

ITT

ING

RIG

HT

SID

E

A M

INIM

UM

OF

12.

000"

CLE

AR

AN

CE

FR

OM

AN

Y O

BS

TR

UC

TIO

NIS

RE

QU

IRE

D F

OR

RE

MO

VA

L O

F C

ON

TR

OL

BO

X.

A M

INIM

UM

OF

15.

000"

CLE

AR

AN

CE

FR

OM

AN

Y O

BS

TR

UC

TIO

N IS

RE

QU

IRE

D F

OR

RE

MO

VA

L O

F H

EA

T R

EC

OV

ER

Y C

OR

ES

, FA

NS

, ET

C.

TH

E A

CC

ES

S D

OO

R C

AN

BE

RE

MO

VE

D F

RO

M C

AB

INE

T W

ITH

ON

LY 2

.000

" O

F C

LEA

RA

NC

E.

CO

NT

RO

L P

LAT

E

AC

CE

SS

DO

OR

CO

RE

RE

VE

RS

ED

DO

OR

OP

TIO

N

Cen

ter

of g

ravi

ty

Dire

ctio

n of

airf

low

NO

TE

S:

PT

SB6L

C P

OLY

CO

RE

B6L

C A

LUM

INU

M C

OR

ELB

.38

.49

24.9

651

.29

33.2

614

8.00

Kg

17.4

511

.32

23.2

615

.08

67.1

3

PT

SA B C D

TO

TAL

LB.

44.2

128

.67

58.9

238

.21

170.

00

20.0

013

.00

26.7

217

.30

77.1

1

Kg

A B C

TO

TAL

D

14 G

auge

wire

nut

Con

dens

ate

drai

n fit

ting

(2 x

)

A B3/

4" N

PT

CO

NN

EC

TIO

N T

AB

LE

CO

NN

EC

TIO

N S

IZE

S

NO

TE

: TH

IS M

OD

EL

HA

S A

DA

MP

ER

LO

CA

TE

D O

N T

HE

OU

TD

OO

R IN

TAK

E C

ON

NE

CT

ION

. TH

IS D

AM

PE

R W

ILL

CLO

SE

DU

RIN

G A

DE

FR

OS

T C

YC

LE O

R W

HE

N T

HE

UN

IT IS

PLA

CE

D IN

TH

E 'O

FF

' PO

SIT

ION

WIT

H P

OW

ER

MA

INTA

INE

D T

O T

HE

UN

IT.

TH

IS D

AM

PE

R IS

NO

T D

ES

IGN

ED

AS

A B

AC

KD

RA

FT

DA

MP

ER

AN

D W

ILL

RE

MA

IN O

PE

N IF

PO

WE

R IS

DIS

CO

NN

EC

TE

D F

RO

M T

HE

UN

IT F

OR

AN

Y R

EA

SO

N.

VK

0108

A

8.00

0"

8.00

0"

B6L

C E

RV

HM

CO

RE

PT

SLB

.K

gA B C D

TO

TAL

40.8

026

.52

54.3

035

.31

156.

96

18.8

812

.27

25.1

216

.33

72.6

0

13

Appendix B (cont’d)

UNIT DIMENSIONS

B-2: B6LC WITH RECIRCULATION MODULE (FACTORY INSTALLED)

28.1

2"14

.00"

4.00

"

1.75

"

8.00

"

2.75

"

19.2

07"

5.12

5"

Acc

ess

Doo

r

Str

ap M

ount

ing

Loca

tion

Dra

in F

ittin

gN

OT

E:

For

uni

ts w

ith th

e re

vers

ed d

oor

optio

n, in

terio

r co

mpo

nent

s w

ill a

ppea

r as

a m

irror

imag

e of

the

abov

e di

agra

m.

49.5

50"

Line

Pow

er

Con

trol

Box

Dry

Con

tact

s

Rev

erse

Doo

r O

ptio

n

Fres

h A

irto

Bui

ldin

g

Exh

aust

Air

to O

utdo

ors

8.00

"

4.00

" 24

.50"

3.53

"

12.

00"

15.0

0"

Acc

ess

Doo

r Cor

e

Rev

erse

d D

oor

Opt

ion

Con

trol

Pla

te

A m

inim

um o

f 12.

00"

clea

ranc

e fr

om a

ny o

bstr

uctio

nis

req

uire

d fo

r re

mov

al o

f con

trol

box

.A

min

imum

of 1

5.00

" cl

eara

nce

from

any

obs

truc

tion

is r

equi

red

for

rem

oval

of

hea

t rec

over

y co

res,

fans

, etc

.T

he a

cces

s do

or c

an b

e re

mov

ed fr

om c

abin

et w

ith o

nly

2.00

" of

cle

aran

ce.

8.00

"

8.00

"

14.1

0"

14.0

0"

7.10

"

Fres

h A

irFr

om O

utsi

de

Exh

aust

Air

From

Bui

ldin

g

4.00

"

1.75

"

VK

0109

A

B6L

C P

OLY

CO

RE

wit

h r

ecir

cula

tio

n m

od

ule

B6L

C A

LUM

INU

M C

OR

Ew

ith

rec

ircu

lati

on

mo

du

leLB

.19

7K

g90

PT

ST

OTA

LLB

.23

110

5K

gT

OTA

LP

TS

B6L

C E

RV

HM

CO

RE

wit

h r

ecir

cula

tio

n m

od

ule

PT

ST

OTA

LLB

.20

695Kg

14


UNIT DIMENSIONS

B-3: 12LC (WITHOUT RECIRCULATION MODULE)

41.2

06"

40.3

26"

20.0

00"

5.71

5"

20.6

20"

14.2

50"

34.0

00"

5.12

5"19

.207

"

4.02

8"

11.3

25"

12.0

00"

15.0

00"

20.0

00"

4.00

0"

2.75

0"

11.0

00"

20.0

00"

9.87

8"

24.5

00"

8.00

0"

8.00

0"

4.00

0"8.00

0"

10.0

00"

B

A

FR

ES

H A

IRT

O B

UIL

DIN

G

EX

HA

US

T A

IRT

O O

UT

DO

OR

S

LIN

E P

OW

ER

LOW

VO

LTA

GE

TE

RM

INA

L S

TR

IPS

CO

NT

RO

L B

OX

AC

CE

SS

CO

NT

RO

L C

OV

ER

AC

CE

SS

DO

OR

CO

RE

RE

VE

RS

ED

DO

OR

OP

TIO

N

AC

CE

SS

DO

OR

DR

AIN

FIT

TIN

G

EX

HA

US

T A

IRF

RO

M B

UIL

DIN

G

FR

ES

H A

IRF

RO

M O

UT

DO

OR

S

ST

RA

P M

OU

NT

LOC

AT

ION

RE

VE

RS

E D

OO

RO

PT

ION

CDB

A

TO

P

OU

TD

OO

R A

IR

RE

TU

RN

AIR

NO

TE

: FO

R U

NIT

S W

ITH

TH

E R

EV

ER

SE

D D

OO

R O

PT

ION

,IN

TE

RIO

R C

OM

PO

NE

NT

S W

ILL

AP

PE

AR

AS

A M

IRR

OR

IMA

GE

OF

TH

E A

BO

VE

DIA

GR

AM

.

A M

INIM

UM

OF

12.

000"

CLE

AR

AN

CE

FR

OM

AN

Y O

BS

TR

UC

TIO

NIS

RE

QU

IRE

D F

OR

RE

MO

VA

L O

F C

ON

TR

OL

BO

X.

A M

INIM

UM

OF

15.

000"

CLE

AR

AN

CE

FR

OM

AN

Y O

BS

TR

UC

TIO

N IS

RE

QU

IRE

D F

OR

RE

MO

VA

LO

F H

EA

T R

EC

OV

ER

Y C

OR

ES

, FA

NS

, ET

C.

TH

E A

CC

ES

S D

OO

R C

AN

BE

RE

MO

VE

D F

RO

M C

AB

INE

T W

ITH

ON

LY 2

.000

" O

F C

LEA

RA

NC

E.

EX

HA

US

T A

IR

SU

PP

LY A

IR

FR

ON

T V

IEW

RIG

HT

SID

ELE

FT

SID

E

Cen

ter

of g

ravi

ty

Dire

ctio

n of

airf

low

NO

TE

S:

PT

SB12

LC P

OLY

CO

RE

B12

LC A

LUM

INU

M C

OR

ELB

.54

.02

38.9

854

.02

38.9

818

6.00

Kg

24.5

017

.68

24.5

017

.68

84.3

6

PT

SA B C D

TO

TAL

LB.

60.4

143

.59

60.4

143

.59

208.

00

27.4

019

.77

27.4

019

.77

94.3

4

Kg

A B C

TO

TAL

D

14 G

AU

GE

WIR

E N

UT

CO

ND

EN

SA

TE

DR

AIN

FIT

TIN

G (

2X)

A B3/

4" N

PT

CO

NN

EC

TIO

N T

AB

LE CO

NN

EC

TIO

N S

IZE

S

NO

TE

: TH

IS M

OD

EL

HA

S A

DA

MP

ER

LO

CA

TE

D O

N T

HE

OU

TD

OO

R IN

TAK

E C

ON

NE

CT

ION

. TH

IS D

AM

PE

R W

ILL

CLO

SE

DU

RIN

G A

DE

FR

OS

T C

YC

LE O

R W

HE

N T

HE

UN

IT IS

PLA

CE

D IN

TH

E 'O

FF

' PO

SIT

ION

WIT

H P

OW

ER

MA

INTA

INE

D T

O T

HE

UN

IT.

TH

IS D

AM

PE

R IS

NO

T D

ES

IGN

ED

AS

A B

AC

KD

RA

FT

DA

MP

ER

AN

D W

ILL

RE

MA

IN O

PE

N IF

PO

WE

R IS

DIS

CO

NN

EC

TE

D F

RO

M T

HE

UN

IT F

OR

AN

Y R

EA

SO

N.

VK

0110

A

B12

LC E

RV

HM

CO

RE

PT

SLB

.K

gA B C D

TO

TAL

57.8

441

.68

57.9

241

.68

199.

00

26.8

419

.35

26.8

819

.34

92.4

1

15


UNIT DIMENSIONS

B-4: B12LC WITH RECIRCULATION MODULE (FACTORY INSTALLED)

8.00

"

1.75

"

10.0

0"

20.0

0"

2.75

"

Line

Pow

er

Dry

Con

tact

s

49.5

50"

Str

ap M

ount

ing

Loca

tion

Fres

h A

irFr

om O

utdo

or

Exh

aust

Air

From

Bui

ldin

g

5.12

5"

Cor

e

Rev

erse

d D

oor

Opt

ion

Acc

ess

Doo

r

15.0

0"

Dra

in F

ittin

g

Acc

ess

Doo

r

20.0

00"

20.0

00"10

.000

"

19.2

07"

Con

trol

Box

NO

TE

:F

or u

nits

with

the

reve

rsed

doo

r op

tion,

inte

rior

com

pone

nts

will

app

ear

as a

mirr

or im

age

of th

e ab

ove

diag

ram

.

A m

inim

um o

f 12.

00"

clea

ranc

e fr

om a

ny o

bstr

uctio

nis

req

uire

d fo

r re

mov

al o

f con

trol

box

.A

min

imum

of 1

5.00

" cl

eara

nce

from

any

obs

truc

tion

is r

equi

red

for

rem

oval

of h

eat r

ecov

ery

core

s, fa

ns, e

tc.

The

acc

ess

door

can

be

rem

oved

from

cab

inet

with

onl

y 2.

00"

of c

lear

ance

.

Rev

erse

d D

oor

Opt

ion

Exh

aust

Air

To O

utsi

de

Fres

h A

irTo

Bui

ldin

g

41.2

4"

24.5

0"

8.00

"

4.00

"

3.53

"

8.00

"

8.00

"

4.00

"

1.75

"

VK

0111

A

12.

00"

Con

trol

Cov

er

PT

SB12

LC P

OLY

CO

RE

wit

h r

ecir

cula

tio

n m

od

ule

B12

LC A

LUM

INU

M C

OR

Ew

ith

rec

ircu

lati

on

mo

du

leLB

.24

7K

g11

2P

TS

TO

TAL

LB.

269

122

Kg

TO

TAL

B12

LC E

RV

HM

CO

RE

wit

h r

ecir

cula

tio

n m

od

ule

PT

ST

OTA

LLB

.26

912

2K

g

16


UNIT DIMENSIONS

B-5: B1600705

10.0

00"

Cen

ter

of g

ravi

tyD

irect

ion

of a

irflo

w

B16

0070

5LB

.K

g32

.74

14.8

568

.46

31.0

535

.20

15.9

773

.60

33.3

821

0.00

1.87

5"

EX

HA

US

T A

IRO

PE

NIN

G

SU

PP

LY A

IRO

PE

NIN

G

20.7

50"

8.00

0"

10.7

50"

7.50

0"

10.6

05"

12.1

04"

2.15

7"

2.00

0" 37.0

00"

24.7

36"

31.0

80"

51.0

00"

21.0

00"

HE

AT

RE

CO

VE

RY

CO

RE

AC

CE

SS

DO

OR

47.0

00"

8.00

0"

DE

FR

OS

T A

IRO

PE

NIN

G

EX

HA

US

TA

IRO

UT

DO

OR

AIR

OU

TD

OO

R

AIR

OP

EN

ING

RE

TU

RN

AIR

OP

EN

ING

RE

TU

RN

AIR

CO

ND

EN

SA

TE

DR

AIN

SU

PP

LYA

IR

3.62

5"2.

000"

14.0

00"

1.87

5"3.

750"

40.5

00"

8.00

0"

12.2

50"

8.00

0"

15.2

50"

B

A

2.00

0"Li

ne V

olta

ge In

A m

inim

um o

f 12.

00"

clea

ranc

e fr

om a

ny

obst

ruct

ion

is r

equi

red

for

pow

er h

ook-

up, l

ow

volta

ge r

emot

e co

nnec

tion,

and

con

trol

pan

el a

cces

s.

A m

inim

um o

f 21.

00"

clea

ranc

e fr

om a

ny o

bstr

uctio

nis

req

uire

d fo

r re

mov

al o

f hea

t rec

over

y co

res,

fans

, etc

.T

he a

cces

s do

or c

an b

e re

mov

ed fr

om c

abin

et w

ith o

nly

2.00

" of

cle

aran

ce.

Low

Vol

tage

Term

inal

Str

ips

8.00

0"

A B C DT

OTA

L95

.25

22.5

00"

AB

CD

TO

P

RIG

HT

SID

EF

RO

NT

NO

TE

S:

LEF

T S

IDE

PT

S

14 g

auge

wire

nut

Con

dens

ate

drai

n fit

ting

(2x)

A B3/

4" N

PT

CO

NN

EC

TIO

N T

AB

LE CO

NN

EC

TIO

N S

IZE

S

VK

0100

A

17

Appendix C

BALANCING DAMPERS POSITION

B6LC AND B12LC

Balancing Damper

Reverse Door Option

Exhaust Air

Fresh AirFrom Outdoors

Min. 8" (203 mm)

(Optional) Canvas Vibration Isolator

Gravity Backdraft Damper(for recirculationdefrost option only)

Min.12" (305 mm)Exhaust Airto Outdoors

Fresh Airto Building

B1600705

Balancing Damper(not supplied)

Canvas Vibration Isolator

Dry ContactsVJ0123A

18

Appendix D

DRAIN CONNECTIONS

B6LC AND B12LC

Min. 3”[76 mm]

Min. 1”[25 mm]

3/4” NPTcoupler

Water trap

Min. 4”[102 mm]

Min. 4”[102 mm]

Plastic hoseTo drainNOTES: 1. All hose, pipe and couplers to be supplied by others.2. Slope drain lines minimum 1/4” per foot.

Min. 1”[25 mm]

Min. 3”[76 mm]

Plastic drain fitting

To drain

Copper orplastic pipe

VO0002A

B1600705

Min. 3”[76 mm]

Min. 1”[25 mm]

3/4” NPTcoupler

Water trap

Min. 4”[102 mm]

Min. 4”[102 mm]

Plastic hoseTo drain

NOTES: 1. All hose, pipe and couplers to be supplied by others.2. Slope drain lines minimum 1/4” per foot.

Min. 1”[25 mm]

Min. 3”[76 mm]

Plastic drain fitting

To drain

Copper orplastic pipe

VO0001A

19

Appendix E

TERMINAL CONTROL DIAGRAMS

A low voltage remote control wiring interface is provided on the unit. The connections for the low voltage remote wiring are located on two terminals adjacent to the exhaust fan outlet (or adjacent to the supply fan outlet on the B1600705 unit). All field installed wiring must be low voltage class II.

REMOTE WALL CONTROL

Optional wall control requires a 4 wire LVT-24 gauge (or equivalent). This remote wall control runs on 12 VDC.

LOW VOLTAGE CONTROLS

All other terminals are dry contacts.Low Voltage terminal control consists of the following:

WALL CONTROL

4 wire LVT 24 gauge minimum

OCCUPIED (NIGHT SET BACK) TIMER/SENSOR

24 VAC, needs dry contact

LOW - COM - HIGH

Remote fan switching requires a single pole, double throw switch (SPDT)

FAN INTERLOCK RELAY OUTPUT (FF)

Dry contact closes on ventilation or defrost. Used to control external fan.

Two types of remote wall controls are available:

1. Slide Switch Wall Control with fan switch and dehumidistat control (for B6LC and 1B2LC units)

2. VT10W Wall Control with fan mode selection, dehumidistat control and high speed recirculation mode (for B1600705 unit).

The remote wall controls work with the microprocessor electronic control within the unit to control ventilation sequences. Each wall control has different features and require 4-wire connection to the unit as shown below.

Without the wall control, fans can be operated with a remote fan switch as shown in Appendix E-4.

NOTE:

When using a wall control, never use the the LOW, COMMON and HIGH terminals.

E-1: TERMINAL LABEL

WALL CONTROL

CLASS 2 VOLTAGE

Black

OCCUPIEDTIMER/SENSOR

F

F

LOW

COMMON

HIGH

Red

Green

Yellow

NOTE: Connections are all dry contacts except wall control and 24VAC power supply.

Use of 24VAC circuit requires isolating contacts (ex. thermostat) to preventinterconnection of Class 2 outputs.

VE0002A

E-2: WALL CONTROL CONNECTION

WallControl

JUM

PE

R

WALL CONTROL

CLASS 2 VOLTAGE

Black


F

F

LOW

COMMON

HIGH

Red

Green

Yellow



VE0006A

20

Appendix E (cont’d)

TERMINAL CONTROL DIAGRAMS

Occupancy control is achieved by connection to the terminal interface shown below. These terminals require a dry contact which could be provided by a number of types of controls such as a timer, light sensor, occupancy sensor, building management system, or other. The unit will not operate unless these contacts are

closed!!

The illustration below shows a factory installed jumper and programmable timer option (supplied by others).

Remote fan control can be achieved by connecting dry contact controls to the terminal interface at terminals labeled: LOW - COM - HIGH.

These controls could be the following: SPDT switch, dehumidistat, CO2 sensor, light sensor, timer, building management system, etc., supplied by others.

The illustration below represents a switch connected to the unit.

E-3: OCCUPIED TIMER/SENSOR CONNECTION

(NOT SOLD BY BROAN)

JUMPER(factory installed)

OCC. CONTROL(field installed)

NSB Timer

1

M

2 3 4 5

JUM

PE

R

CLASS 2 VOLTAGE


Use of 24VAC circuit requires isolating contacts (ex. thermostat) to prevent interconnection of Class 2 outputs.

WALL CONTROL

CLASS 2 VOLTAGE

Black


24 (-) VAC

F

F

LOW

COMMON

HIGH

Red

Green

Yellow

VE0314A


Use of 24VAC circuit requires isolating contacts (ex. thermostat) to prevent interconnection of Class 2 outputs.

24 (+) VAC

WALL CONTROLBlack


F

F

LOW

COMMON

HIGH

Red

Green

Yellow

E-4: REMOTE FAN CONTROL

JUM

PE

R

REMOTE

LOW HIGH

FAN SWITCH

WALL CONTROL

CLASS 2 VOLTAGE

Black


F

F

LOW

COMMON

HIGH

Red

Green

Yellow



VE0005A

Appendix F

CONTROL BOX ASSEMBLY B6LC AND B12LC

Control cover plate

Control box

Remote control access plate

Remote wiring terminal block

Unit cabinet

VE0001A

21

B6L

C a

nd

B160

0705

UN

ITS

Outd

oor

Air

-40°F

Outd

oor

Air

-22°F

Outd

oor

Air

-4°F

Outd

oor

Air

14°F

Outd

oor

Air

32°F

Des

ired

Air

Tem

pera

ture

Des

ired

Air

Tem

pera

ture

Des

ired

Air

Tem

pera

ture

Des

ired

Air

Tem

pera

ture

Des

ired

Air

Tem

pera

ture

Sup

ply

Air

(CF

M)

Sup

ply

Air

(L/s

)

55°F

68°F

73°F

55°F

68°F

73°F

55°F

68

°F73

°F55

°F68

°F73

°F55

°F68

°F73

°F

kWkW

kWkW

kWkW

kWkW

kWkW

kWkW

kWkW

kW

700

330

7.4

10.4

11.5

5.6

8.6

9.7

3.9

6.8

8.0

2.1

5.1

6.2

0.3

3.3

4.4

650

307

6.6

9.4

10.5

5.0

7.8

8.9

3.4

6.2

7.3

1.8

4.6

5.6

0.2

3.0

4.0

600

283

5.9

8.5

9.4

4.5

7.0

8.0

3.0

5.6

6.5

1.6

4.1

5.1

0.1

2.7

3.7

550

259

5.2

7.6

8.5

3.9

6.3

7.2

2.6

5.0

5.9

1.3

3.7

4.6

0.1

2.4

3.3

500

236

4.0

6.1

7.0

3.0

5.1

5.9

1.9

4.0

4.9

0.9

3.0

3.8

-1.

92.

7

450

212

3.0

4.9

5.6

2.1

4.0

4.8

1.3

3.2

3.9

0.4

2.3

3.1

-1.

52.

2

400

189

2.2

3.9

4.6

1.5

3.2

3.9

0.9

2.5

3.2

0.2

1.9

2.5

-1.

21.

8

Alth

ough

the

B6L

C, B

1600

705

and

B12

LC m

odel

s ha

ve g

ood

effic

ienc

ies,

the

supp

ly a

ir co

uld

be c

olde

r th

an th

e am

bien

t roo

m a

ir. It

is p

ossi

ble

to e

limin

ate

the

disc

omfo

rt a

ssoc

iate

d w

ith th

is te

mpe

ratu

re d

iffer

ence

by

inst

allin

g an

ele

ctric

duc

t hea

ter.

Thi

s w

ill te

mpe

r th

e ai

r be

fore

it is

dis

trib

uted

thro

ugho

ut th

e bu

ildin

g.T

he ta

bles

bel

ow g

ives

the

heat

ing

requ

irem

ents

at d

iffer

ent t

empe

ratu

res

and

airf

low

s.N

OT

E:

The

dat

a do

es n

ot r

efle

ct a

red

uctio

n in

effe

ctiv

enes

s du

e to

fros

ting.

B

ased

on

the

stan

dard

air

at:

1.2

Kg/

m3

and

Cp

= 1

.0 K

J/K

g°C

13

.35

lb/ft

3 an

d C

p =

.24

Btu

/lbm

°F

Appendix G

MAKE-UP HEAT REQUIREMENTS

B6LC AND B1600705

22

B12

LC

UN

ITO

utd

oor

Air

-40°F

O

utd

oor

Air

-22°F

Outd

oor

Air

-4°F

Outd

oor

Air

14°F

O

utd

oor

Air

32°F

Des

ired

Air

Tem

pera

ture

Des

ired

Air

Tem

pera

ture

Des

ired

Air

Tem

pera

ture

Des

ired

Air

Tem

pera

ture

Des

ired

Air

Tem

pera

ture

Sup

ply

Air

(CF

M)

Sup

ply

Air

(L/s

)

55°F

68°F

73°F

55°F

68°F

73°F

55°F

68°F

73°F

55°F

68°F

73°F

55°F

68°F

73°F

kWkW

kWkW

kWkW

kWkW

kWkW

kWkW

kWkW

kW

1250

590

14.6

19.9

21.9

11.2

16.5

18.5

7.8

13.1

15.2

4.4

9.7

11.8

1.0

6.3

8.4

1200

566

13.5

18.6

20.6

10.4

15.5

17.4

7.2

12.3

14.3

4.0

9.1

11.1

0.8

5.9

7.9

1150

542

12.6

17.4

19.3

9.6

14.5

16.4

6.6

11.5

13.4

3.6

8.5

10.4

0.7

5.5

7.4

1100

519

11.2

15.9

17.7

8.5

13.2

15.0

5.8

10.5

12.3

3.1

7.7

9.6

0.4

5.0

6.8

1050

495

10.7

15.2

16.9

8.1

12.6

14.3

5.5

10.0

11.7

2.9

7.4

9.1

0.4

4.8

6.5

1000

472

9.9

14.1

15.7

7.4

11.7

13.3

5.0

9.3

10.9

2.6

6.9

8.5

0.2

4.4

6.1

900

425

8.5

12.4

13.8

6.4

10.2

11.7

4.3

8.1

9.6

2.2

6.0

7.5

0.1

3.9

5.4

800

377

7.0

10.4

11.7

5.2

8.6

9.9

3.4

6.8

8.2

1.7

5.0

6.4

-3.

34.

6

700

330

5.1

8.1

9.3

3.7

6.7

7.9

2.3

5.3

6.5

0.9

3.9

5.1

-2.

53.

7

Alth

ough

the

B6L

C, B

1600

705

and

B12

LC m

odel

s ha

ve g

ood

effic

ienc

ies,

the

supp

ly a

ir co

uld

be c

olde

r th

an th

e am

bien

t roo

m a

ir. It

is p

ossi

ble

to e

limin

ate

the

disc

omfo

rt a

ssoc

iate

d w

ith th

is te

mpe

ratu

re d

iffer

ence

by

inst

allin

g an

ele

ctric

duc

t hea

ter.

Thi

s w

ill te

mpe

r th

e ai

r be

fore

it is

dis

trib

uted

thro

ugho

ut th

e bu

ildin

g.T

he ta

bles

bel

ow g

ives

the

heat

ing

requ

irem

ents

at d

iffer

ent t

empe

ratu

res

and

airf

low

s.N

OT

E:

The

dat

a do

es n

ot r

efle

ct a

red

uctio

n in

effe

ctiv

enes

s du

e to

fros

ting.

B

ased

on

the

stan

dard

air

at:

1.2

Kg/

m3

and

Cp

= 1

.0 K

J/K

g°C

13

.35

lb/ft

3 an

d C

p =

.24

Btu

/lbm

°F

Appendix G

MAKE-UP HEAT REQUIREMENTS

B12LC

23

Appendix H

WIRING DIAGRAMS

G

NOTE A: THE MEDIUM SPEED WIRES MAY OPTIONNALLY

REPLACE THE LOW SPEED (RED) WIRES

RUNNING FROM RELAY LOW SPEED.

1000

1001

1002

1003

1004

1005

1006

1007

1008

1009

1010

1011

1012

1013

1020

1021

1022

1023

1024

1025

1026

1027

1028

1029

1030

1031

1032

1033

MAINPOWERPJ1001

GL1004

2 2

1 1

W

BK

to 1002, 1021NEUT

to 1020, 2016120 VAC

NOTE A

BL

2 2 2 2

3 3 3 3

1 1 1 1

4 4 4 4

R

W/R

BK/YPJ1007

PJ1007A

HIGHCOMLOW

MEDGND

GN

MOT1008EXHAUSTBLOWER

HIGHSPEED

LOWSPEED

8 6

8 6

CR1026

from 1022EXHAUST

CR1024

NOTE A

BL

2 2 2 2

3 3 3 3

R

1 1 1 1

4 4 4 4BK/Y

PJ1001APJ1001B

W

to 2017INTAKE

LOW SPEED4 2

CR1024

from 1013NEUT

DEFROSTCOM NCCR1029

HIGH SPEED4 2

CR1026CAP10015 μF

HIGHCOMLOW

MEDGND

GN

MOT1002SUPPLYBLOWER

from 2008INTERLOCK

from 2007REMOTE FAN

BL

BL

Y

R

GN

BK

from 200312 VDC

from 2003TRANSMIT

from 2005RECEIVE

from 2007LOGIC GND SN1030

DEFROSTTHERMISTOR

10K OHMS

BK

BK

1

2

1

2

N/O

N/C

COM

J4

J2

1

2

3

4

5

6

7

8

9B

G

R

Y

OL

OC

I

BK/R

W/BL

O

W/Y

R

W/R

WBK

from 1012120 VAC

CONTROLBOARD

UCB1021

F

F

from 1013NEUT

to 1008, 2014EXHAUST

CR1024

0 1

CR1026

0 1

CR1029

to 2013CORE DAMPER

LOW SPEEDNO 1003, 1009NC

HIGH SPEEDNO 1001, 1007NC

DEFROSTNONC 1002

BKBK/RBK/YBLBNGNO

RWW/BLW/RW/YY

BLACKBLACK/REDBLACK/YELLOWBLUEBROWNGREENORANGE

REDWHITEWHITE/BLUEWHITE/REDWHITE/YELLOWYELLOW

COLOR CODE

FIELD WIRING (USE COPPER CONDUCTORS ONLY)UNIT ASSEMBLY (NOT ON CONTROL PANEL)

BK

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

TB2002 TB2002ABK

BK

BK

W

R

W/R

GN

GN

GN

BK/R

BL

BL

YPJ2003 PJ2003

PJ2003

PJ2003

PJ2003

PJ2003

R2004

PJ2013 PJ2013A

PJ2016 PJ2016A

1 1 1 1

1 1 1 1

2 2 2 2

2 2 2 2

1 1

3 32 2

4 4

6 6

5 5

3.9 K

ACT2016INTAKEACTUATOR

2

1

ACT2013COREACTUATOR

2

1

from 1002INTAKE

from 1012120 VAC

from 1022EXHAUST

from 1030CORE DAMPER

to 1021INTERLOCK

to 1022REMOTE FAN

to 1028RECEIVE

to 1029LOGIC GND

to 1027TRANSMIT

to 102612 VDC

BLACK

RED

OCC.

UNOCC.

REM FAN

INTERLOC

GREEN

YELLOW

LOW

COM

HIGH

TAGSCR1029CR1024CR1026UCB1021

QTY.1

2

1

DESCRIPTIONRELAY SPDT 120 VAC 1 HP 30 A @ 120 VAC

RELAY DPST 120 VAC 1 HP 30 A @ 120 VAC

PC BOARD

CONTROL BOX BOM

JUMPER SETTINGSFOR CONTROL BOARD

JU1JU1JU1JU1JU1JU1JU1

ABCDEFG

OFFOFFOFFONONONON VE0362A

J3

J1

B6LC & B12LC - Exhaust Defrost - Normal Low Speed

BK

BKBN

BN

CAP10075 μF

BK

BKBN

BN

BL

BL

BK/Y

W W

R R

BL BL

BK

BK

BK

BK

BK/Y BK

W/R W

R R

BL BL

EXT.BK

W

24

Appendix H (cont’d)

WIRING DIAGRAMS

from 2008INTERLOCK

from 2007REMOTE FAN

BL

BL

Y

R

GN

BK

from 200312 VDC

from 2003TRANSMIT

from 2005RECEIVE

from 2007LOGIC GND

1

2

N/O

N/C

COM

J4

J2

1

2

3

4

5

6

7

8

9B

G

R

Y

OL

OC

I

BK/R

W/BL

O

W/Y

R

W/R

WBK

from 1012120 VAC

CONTROLBOARD

UCB1021

F

F

from 1013NEUT

to 1008EXHAUST

CR1024

0 1

CR1026

0 1

CR1029

to 2022DEFROST SIGNAL

LOW SPEEDNO 1003, 1009NC

HIGH SPEEDNO 1001, 1007NC

DEFROSTNONC 1008

J3

J1

to 2032LOW LOCKOUT

4 4PJ1027

to 2025ADDER COMMON

3 3

PJ1027

PJ1024

2 2

PJ10241 1R

from 2031LOW LOCKOUT

G

NOTE A: THE MEDIUM SPEED WIRES MAY OPTIONNALLY

REPLACE THE LOW SPEED (RED) WIRES

RUNNING FROM RELAY LOW SPEED.

1000

1001

1002

1003

1004

1005

1006

1007

1008

1009

1010

1011

1012

1013

1020

1021

1022

1023

1024

1025

1026

1027

1028

1029

1030

1031

1032

1033

MAINPOWERPJ1001

GL1004

2 2

1 1

W

BK

to 1002, 1021NEUT

to 1020120 VAC

NOTE ABL

2 2 2 2

3 3 3 3

1 1 1 1

4 4 4 4

R

W/R

BK/Y PJ1007 PJ1007A

HIGHCOMLOW

MEDGND

MOT1008EXHAUSTBLOWER

HIGH SPEED

LOWSPEED

8 6

8 6

CR1026

from 1022EXHAUST

CR1024

NOTE A

BL

2 2 2 2

3 3 3 3

R

1 1 1 1

4 4 4 4BK/Y PJ1001A PJ1001B

W

LOW SPEED4 2

CR1024

from 1013NEUT

HIGH SPEED4 2

CR1026

HIGHCOMLOW

MEDGND

GN

MOT1002SUPPLYBLOWER

BK

to 2029SUPPLY ON

PJ1027

CR1029COM NCDEFROST

5 5

PJ1027 BKto 2026ADDER 120 VAC

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

TB2002 TB2002ABK

BK

R

GN

GN

GN

BL

BL

YPJ2003 PJ2003

PJ2003

PJ2003

PJ2003

PJ2003

R2004

1 1

3 32 2

4 4

6 6

5 5

3.9 K

to 1021INTERLOCK

to 1022REMOTE FAN

to 1028RECEIVE

to 1029LOGIC GND

to 1027TRANSMIT

to 102612 VDC

BLACK

RED

OCC.

UNOCC.

REM FAN

INTERLOC

GREEN

YELLOW

LOW

COM

HIGH

2020

2021

2022

2023

2024

2025

2026

2027

2028

2029

2030

2031

2032

2033

from 1030DEFROST SIGNAL

PJ20263 3

1 1

4 4

5 5

2 2

1 1

2 2

from 1027ADDER COMMON

from 1011ADDER 120 VAC

from 1000SUPPLY ON

from 1024LOW LOCKOUT

to 1023LOW LOCKOUT

PJ2031

BK/R

W/BL

BK

BK/Y

R

R

R

W

W

BL

BL

W

R

O

CR2022

TB2023

FU2026

CR2028

CR2028

CR2022

CR2022

ACT2031

UNOCCUPIEDHIGH

UNOCCUPIEDHIGH

0.25

XF202540 VA

CONTROLSTRANSFORMER

H1H2 X2

X1

COM NCDEFROST 2

COM NODEFROST 2

CR2028

7 85 3

6 2

2

1

3

G

R

C

UNOCCUPIEDHIGHNO 2028NC 2031

NOTE: REVERSE DOOR ACCESS, SWAP WIRES ON TERMINALS 2 AND 3.

DEFROST 2NO 2033NC 2032

RECIRC DAMPER BOX

FIELD WIRING (USE COPPER CONDUCTORS ONLY)UNIT ASSEMBLY (NOT ON CONTROL PANEL)

BKBK/RBK/YBLBNGNGN/Y

ORWW/BLW/RW/YY

BLACKBLACK/REDBLACK/YELLOWBLUEBROWNGREENGREEN/YELLOW

ORANGEREDWHITEWHITE/BLUEWHITE/REDWHITE/YELLOWYELLOW

COLOR CODE

VE0364A

2 2

B6LC & B12LC - Recirculation Defrost - Normal Low Speed

BK

W

EXT.

BK/Y

BK/Y BK

W W

BK R R

BL BL

GN/Y

GN

GN/Y

CAP10015 μF

BK

BKBN

BN

CAP10075 μF

BK

BKBN

BN

SN1030

DEFROSTTHERMISTOR

10K OHMS

BK

BK

1

2BL

BL BK/R

W/BL

6 6

W

R

R

W/BL

BK

BK BK/Y BK

W/R W

BK

BK

R R

BL BL

R

R R

W/Y

BK

BK

BK/R

W/BL

BK/Y

BK

W/BL

W/BL

25



ABCDEFG

OFFOFFOFFONONONON

TAGSCR1029CR2022CR1024CR1026CR2028FU2026UCB1021XF2025

QTY.

2

2

1111

DESCRIPTION

RELAY SPDT 120 VAC 1 HP 30 A @ 120 VAC

RELAY DPST 120 VAC 1 HP 30 A @ 120 VAC

RELAY DPDT 24 VAC 1/2 HP 15 A @ 120 VACFUSE 0.25 A AND FUSE HOLDER MINI

PC BOARD

TRANSFORMER

CONTROL BOX BOM

UNIT CONTROL BOX ADDER CONTROL BOX

VE0365A

B6LC & B12LC - Recirculation Defrost - Normal Low Speed (cont’d)


WIRING DIAGRAMS

NOTE: Written numbers on CR2028 relay may differ from the ones shown, but the relay orientation must be the same as illustrated.

26


WIRING DIAGRAMS

B1600705 - Recirculation Defrost

1000

1001

1002

1003

1004

1005

1006

1007

1008

1009

1010

1011

1012

1020

1021

1022

1023

1024

1025

1026

1027

1028

1029

1030

1031

1032

SPLITTER BLOCKTB1001

2 2

3 3

R1 1

BK/Y

PJ1001

GN

MOT1008EXHAUSTBLOWERHIGH

COMLOW

GND

W/Y

USE COPPERCONDUCTORSONLY

L1 L1LINE

SID

E LOA

D S

IDE

N

GD

N

GD

4 4

2 2

3 3

1 1

4 4

from 1024LOW SPEED

from 1025SUPPLY LOW

from 1026HIGH SPEED

from 1024LOW SPEED

from 1021EXHAUST COM

from 1026HIGH SPEED

PJ1007A R

W/BL

BK/Y

GN/Y

DEFROST 19 1

CR1029

DEFROST 112 4

CR1029

from 2008INTERLOCK

from 2007REMOTE FAN

BL

BL

Y

R

GN

BK

from 200312 VDC

from 2003TRANSMIT

from 2005RECEIVE

from 2007LOGIC GND

1

2

N/O

N/C

COM

J4

J2

1

2

3

4

5

6

7

8

9B

G

R

Y

OL

OC

I

BK/R

W/Y

R

W

W/BLBK

from 1001120 VAC

CONTROLBOARD

UCB1021

F

Ffrom 1002NEUT

to 1008EXHAUST COM

CR1029

DEFROST 1NONC 1008, 1009

J3 J1

to 1001, 1007LOW SPEED

to 1002SUPPLY COM

BK/Yto 1003, 1009HIGH SPEED

W/R

13 14

CR1030

DEFROST 2NO 2023NC 2024

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2020

2021

2022

2023

2024

2025

2026

2027

2028

2029

2030

TB2002 TB2002ABK

BK

R

GN

GN

BL

BL

Y

R20043.9 K

to 1021INTERLOCK

to 1022REMOTE FAN

to 1028RECEIVE

to 1029LOGIC GND

to 1027TRANSMIT

to 102612 VDC

BLACK

RED

OCC.

UNOCC.

REM FAN

INTERLOC

GREEN

YELLOW

LOW

COM

HIGH

GN

BK

PJ2023A

2 2

ACT2023SUPPLY DAMPER

2

1from 1002

NEUT

from 1001120 VAC

33 3

1 1

FU20230.5

XF202440 VA

TRANSFORMERCONTROLS

H1H2 X2

X1

BL O

BK/R

W/R

CR10309 5

DEFROST 2CR1030

9 1DEFROST 2

VE0368A

FIELD WIRINGUNIT ASSEMBLY (NOT ON CONTROL PANEL)

BKBK/RBK/YBLBN/WGNGN/Y

ORWW/BLW/RW/YY

BLACKBLACK/REDBLACK/YELLOWBLUEBROWN/WHITEGREENGREEN/YELLOW

ORANGEREDWHITEWHITE/BLUEWHITE/REDWHITE/YELLOWYELLOW

COLOR CODE

CAP10015 μF

LOWCOMHIGH

GND

MOT1002SUPPLYBLOWER

BK

BKBN/W

BN

CAP10075 μF

BK

BKBN/W

BN

R

W

BK

GN/Y

R

W/BL

BK/Y

GN

2 2

3 3

1 1

4 4

W/BL

R

BK/Y

GN

GN

13 14

SN1030

DEFROSTTHERMISTOR

10K OHMS

BK

BK

1

2BL

BL

BK BK

W BKBK/R

W/R

OBL

BL

PJ1007

GN

W

BK

to 1022, 2024NEUT

to 1020, 2023120 VAC

27


WIRING DIAGRAMS

B1600705 - Recirculation Defrost (cont’d)



ABCDEFG

ONOFFOFFONONONON

TAGSCR1029CR1030

FU2023

UCB1021XF2024R2004SN1030TB1001

QTY.

2

1

11111

DESCRIPTIONRELAY DPDT 120 VAC 1/2 HP

15 A @ 120 VACFUSE 0.5 A AND FUSE HOLDER

FLUSH MOUNT

PC BOARD

TRANSFORMER

RESISTOR 3.9KTHERMISTOR 10K OHMS

SPLITTER BLOCK

CONTROL BOX BOM

VE0369A

159

13

48

12

14

159

13

48

12

14

Appendix I

TROUBLESHOOTING

SYMPTOMS POSSIBLE CAUSES SOLUTIONS

Inside air is too dry Over ventilation - speed setting too highDehumidistat setting is too low

Adjust speed settingSet dehumidistat control in a higher position (if applicable)

Persistent condensation on windows, walls, ceilings, etc.

Improper adjustment of dehumidistat controlImproper ventilation rateWindow frame is too cold or leaky

Adjust dehumidistat control knob to a lower settingInstall a dehumidistat (option)Repair window frame

Unit stops functioning Electrical supply interrupted Check the unit circuit breaker

Air from supply diffusers too cold Imbalance of supply and exhaust air

Outdoor temperature very cold

Check filters and cores for blockageCheck balance of airflowsInstall electric duct heater if necessary

Unit makes annoying noise Blower wheel out of alignment Remove the motor/blower assembly and adjust blower wheel

Core freezing up Imbalance of supply and exhaust air

Defrost damper not functioning

Check filters and cores for blockageCheck balance of airflowsCheck for operation of both defrost damper actuators

For technical assistance and warranty information,please call your local supplier.

NOTE: Written numbers on CR1029 and CR1030 relays may differ from the ones shown, but the orientation of the relays must be the same as illustrated.

28

Appendix I

TROUBLESHOOTING

SYMPTOMS POSSIBLE CAUSES SOLUTIONS

Inside air is too dry Over ventilation - speed setting too highDehumidistat setting is too low

Adjust speed settingSet dehumidistat control in a higher position (if applicable)

Persistent condensation on windows, walls, ceilings, etc.

Improper adjustment of dehumidistat controlImproper ventilation rateWindow frame is too cold or leaky

Adjust dehumidistat control knob to a lower settingInstall a dehumidistat (option)Repair window frame

Unit stops functioning Electrical supply interrupted Check the unit circuit breaker

Air from supply diffusers too cold Imbalance of supply and exhaust air

Outdoor temperature very cold

Check filters and cores for blockageCheck balance of airflowsInstall electric duct heater if necessary

Unit makes annoying noise Blower wheel out of alignment Remove the motor/blower assembly and adjust blower wheel

Core freezing up Imbalance of supply and exhaust air

Defrost damper not functioning

Check filters and cores for blockageCheck balance of airflowsCheck for operation of both defrost damper actuators

For technical assistance and warranty information,please call your local supplier.

Documents

Light Commercial Heat Recovery Ventilators and Energy ... · near or in blowers, dampers, heat exchangers, etc. Once installation is complete, check all modes of operation to ensure