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Installation and Maintenance Manual IMM 1157

Group: Chiller

Part Number: 331373601

Effective: March 2012

Supercedes: November, 2011

Water-Cooled Screw Compressor Chillers

WGS 130AW to WGS 190AW, Packaged Water-Cooled Chiller

WGS 130AA to WGS 190AA, Chiller with Remote Condenser

120 to 200 Tons, 420 to 700 kW

R-134A, 60 Hz

2 WGS 130A to WGS 190A IMM 1157

Table of Contents

Introduction . ......................................3 General Description. .................................... 3 Nomenclature. .............................................. 3 Inspection . ................................................... 3

Installation . ........................................4 Vibration Isolators . ...................................... 6

Water Piping . ...................................10 Flow Switch. .............................................. 12 Glycol Solutions . ....................................... 13 Condenser Water Piping ............................ 14 Water Pressure Drop. ................................. 15

Refrigerant Piping. ..........................18 Unit with Remote Condenser..................... 18 Factory-Mounted Condenser ..................... 21

Dimensional Data . ...........................22 Physical Data. ...................................25

WGS-AW, Water-Cooled........................... 25 WGS-AA Remote Condenser .................... 26

Unit Configuration . .........................27 Components . .............................................. 27

Wiring. ..............................................28 BAS Interface . ........................................... 29 Remote Operator Interface Panel............... 29

Electrical Data................................. 30 Wiring Diagrams. .......................................38 Control Panel Layout .................................46

Sequence of Operation.................... 49 Start-Up and Shutdown. ................ 50

Pre Start-up . ...............................................50 Start-up .......................................................50 Weekend or Temporary Shutdown.............51 Start-up after Temporary Shutdown...........51 Extended Shutdown. ..................................51 Start-up after Extended Shutdown. ............51

System Maintenance ....................... 52 General. ......................................................52 Electrical Terminals . ..................................53 POE Lubrication . .......................................53 Sight Glass and Moisture Indicator . ..........54 Sump Heaters. ............................................54

Maintenance Schedule .................... 55 System Service................................. 56

Troubleshooting Chart . ..............................58 Warranty Statement ....................... 59

Unit controllers are LONMARK certified with an optional LONWORKS communications module.

© 2013 Daikin Applied . Illustrations and data cover the Daikin product at the time of publication and we reserve the right to make changes in design and construction at anytime without notice. Units with remote condensers (Models AA) are not included in the scope of AHRI certification. Unit controllers are LONMARK certified with an optional LONWORKS communications module. The following are trademarks or registered trademarks of their respective companies: BACnet from ASHRAE; LONMARK , LonTalk and LONWORKS and the LONMARK logo are managed, granted, and used by LONMARK International under a license granted by Echelon Corporation; Modbus from Schneider Electric; FanTrol, MicroTech II, Open Choices™, and SpeedTrol from Daikin .

Manufactured in an ISO Certified Facility

IMM 1157 WGS 130A to 190A 3

Introduction

General Description Daikin Type WGS water chillers are designed for indoor installations and are available with factory-mounted water-cooled condensers (Model WGS AW), or arranged for use with remote air-cooled or evaporative condensers (Model WGS AA). Each water-cooled unit is completely assembled and factory wired before evacuation, charging and testing. They consist of two semi-hermetic rotary screw compressors, a two-circuit shell-and-tube evaporator, two shell-and-tube water-cooled condensers (WGS-AW), and complete refrigerant piping.

Units manufactured for use with remote condensers (Models WGS-AA) have all refrigerant specialties factory-mounted and connection points for refrigerant discharge and liquid lines.

Liquid line components are manual liquid line shutoff valves, charging valves, filter-driers, liquid line solenoid valves, sight glass/moisture indicators, and electronic expansion valves.

The electrical control center includes a MicroTech II microprocessor control system and equipment protection and operating controls necessary for dependable, automatic operation.

The compressor circuits are equipped with individual compressor isolation circuit breakers on single point power connection options. A unit disconnect switch is available as an option over the standard power block.

Nomenclature

W G S 130 A W

Inspection When the equipment is received, carefully check all items against the bill of lading to be sure of a complete shipment. Carefully inspect all units for damage upon arrival. All shipping damage must be reported to the carrier and a claim must be filed with the carrier. Check the unit serial plate before unloading the unit to be sure that it agrees with the power supply available. Physical damage to unit after acceptance is not the responsibility of Daikin

Note: Unit shipping and operating weights are given in the physical data tables beginning on page 25.

Water-Cooled Condensing

Global

Rotary Screw Compressor

Nominal Capacity (Tons)

W = Water-Cooled Condenser A = Unit Less Condenser

Design Vintage

4 WGS 130A to 190A IMM1157

Installation

WARNING

Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations, and experienced with this type of equipment. Avoid contact with sharp edges. Personal injury can

result.

Start-up by Daikin Factory Service is included on all units sold for installation within the USA and Canada and must be performed by them to initiate the standard limited product warranty. Two-week prior notification of start-up is required. The contractor should obtain a copy of the Start-up Scheduled Request Form from the sales representative or from the nearest office of Daikin Service. Handling Every model WGS-AW water chiller with water-cooled condensers is shipped with a full refrigerant charge. For shipment, the charge is contained in the condensers and is isolated by the condenser liquid shutoff valves and the compressor discharge valves.

A nitrogen/helium holding charge is applied to remote condenser models to maintain a slight positive system pressure. After installation, the unit must be leak-tested, vacuumed, and charged with the operating charge of refrigerant. The operating charge is field-supplied and charged on remote condenser models.

WARNING

Escaping refrigerant can displace air and cause suffocation. Immediately evacuate and ventilate the equipment area. If the unit is damaged, follow Environmental Protection Agency (EPA) requirements. Do not expose sparks, arcing equipment,

open flame or other ignition source to the refrigerant.

Moving the Unit If optional factory-installed skids are not used, some means such as dollies or skids must be used to protect the unit from damage and to permit easy handling and moving. Figure 1, Lifting the Unit

Notes: 1. You must use lifting halo or "I" spreader equal to the dimensions shown.2. Each lifting cable alone must be strong enough to lift chiller.3. Perform all moving and handling with skids or dollies under the unit when possible, and do not remove

them until the unit is in the final location. (continued next page)

48.0(1219.2)

84.0(2133.6)

62.0(1574.8)

WGS 130-190 PACKAGE

108.0(2743.2)

LIFT ONLY WITH HOLESPROVIDED IN BASE

WGS LESS CONDENSER

62.0(1574.8)

48.0(1219.2)

Water-Cooled Chiller Remote Condenser Chiller

IMM 1157 WGS 130A to 190A 5

4. In moving, always apply pressure to the base on the skids only and not to the piping or other components. A long bar will help move the unit. Do not drop the unit at the end of the roll.

5. Do not attach slings to piping or equipment. Do not attempt to lift the unit by lifting points mounted on the compressors. They are for lifting only the compressor should one need to be removed from the unit. Move unit in the upright horizontal position at all times. Set unit down gently when lowering from the truck or rollers.

Table 1, Lifting Loads

AW, Package Units, lbs. (kg) AA, Less Condenser Units, lbs (kg) WGS Model RF RB LF LB

Shipping Weight

RF RB LF LB Shipping Weight

130A 2276

(1032) 1699 (770)

2213 (1003)

1651 (749)

7840 (3556) 1428 (647)

1444 (655)

1386 (629)

1402 (636)

5659 (2567)

140A 2276

(1032) 1699 (770)

2213 (1003)

1651 (749)

7840 (3556) 1428 (647)

1444 (655)

1386 (629)

1402 (636)

5659 (2567)

160A 2368

(1074) 1794 (813)

2300 (1042)

1742 (790)

8206 (3722) 1515 (687)

1543 (700)

1470 (667)

1496 (679)

6024 (2732)

170A 2471

(1096) 1813 (822)

2350 (1065)

1763 (799)

8345 (3785) 1515 (687)

1543 (700)

1470 (667)

1496 (679)

6024 (2732)

190A 2471

(1096) 1813 (822)

2350 (1065)

1763 (799)

8345 (3785) 1515 (687)

1543 (700)

1470 (667)

1496 (679)

6024 (2732)

NOTES: 1. RF=right front, RB=right back, LB=left back, LF=left front, when view from the control panel. See Figure 2 on page

6. 2. The optional sound enclosure adds 650 lbs (295 kg) to the lifting weight, evenly distributed.

Location WGS chillers are designed for indoor application and must be located in an area where the surrounding ambient temperature is 40°F to 122°F (4.4°C to 50°C).

Because of the NEMA 1 electrical control enclosures, do not expose the units to the weather. A plastic cover over the control box is supplied as temporary protection during shipment. A reasonably level and sufficiently strong floor is required for the water chiller. If necessary, provide additional structural members to transfer the weight of the unit to the nearest beams.

Note: Unit shipping and corner weights are given in Table 1. Operating weights are in the physical data tables beginning on page 25.

Space Requirements for Connections and Servicing The chilled water piping enters and leaves the unit from the right side when looking at the front of the unit (control panel end). Left-hand connections are available as an option. Condenser water connections are located at the rear of the unit, opposite the control panel. Provide clearance of at least 4 feet (1625 mm), or more if codes require in front of the panel. Three feet (1219 mm) clearance should be provided on all other sides and ends of the unit for general servicing. The National Electric Code (NEC) may require additional clearance in front of the control panel and should be consulted. On units equipped with a water-cooled condenser (Type WGS-AW), also provide clearance for cleaning or removal of condenser tubes on one end of the unit. The clearance for cleaning depends on the type of apparatus used, but can be as much as the length of the condenser (10 feet, 3050 mm). Tube replacement requires the tube length of condenser plus one to two feet of workspace. This space can often be provided through a doorway or other aperture.

Placing the Unit The small amount of vibration normally encountered with the water chiller makes this unit particularly desirable for basement or ground floor installations where the unit can be mounted directly to the floor. The floor construction should be such that the unit will not affect the building structure, or transmit noise and vibration into the structure.

6 WGS 130A to 190A IMM1157

Control Panel End

Condenser Connections

3

1

4

2

LF

RF

LB

FRB

Vibration Isolators It is recommended that isolators be used on all upper level installations or in areas where vibration transmission is a consideration.

Figure 2, Isolator Locations

Transfer the unit as indicated under “Moving the Unit.” on page 4. In all cases, set the unit in place and level with a spirit level. When spring-type isolators are required, install springs running under the main unit supports.

The unit should be set initially on shims or blocks at the listed spring free height. When all piping, wiring, flushing, charging, etc., is completed, the springs are adjusted upward to loosen the blocks or shims, which are then removed.

Use a rubber anti-skid pad under isolators if hold-down bolts are not used.

Installation of spring isolators requires flexible piping connections and at least three feet of flexible electrical conduit to avoid straining the piping and transmitting vibration and noise.

NOTE: All spring isolators have four, same color springs per housing.

Table 2, Weights & Vibration Isolators, Packaged Unit, w/o Sound Enclosure

ARRANGEMENT WGS-AW, WITH WATER-COOLED CONDENSERS, WITHOUT SOUND ENCLOSURE

CORNER WEIGHT LBS (KG)

SPRING-FLEX MOUNTINGS RUBBER-IN-SHEAR MOUNTINGS UNIT SIZE

OPR. WT.

Lbs. (kg) 1 2 3 4 1 2 3 4 1 2 3 4

RP-4 RP-4 RP-4 RP-4 130AW

8557 (3881)

1778 (806)

2556 (1159)

1732 (786)

2491 (1130)

1D-2040Black

1D-3600Green

1D-2040 Black

1D-3600 Green Brick Red Lime Brick Red Lime


8557 (3881)

1778 (806)

2556 (1159)

1732 (786)

2491 (1130)

1D-2040Black

1D-3600Green

1D-2040 Black



9314 (4225)

1910 (866)

2805 (1272)

1863 (845)

2736 (1241)

1D-2700Purple

1D-3600Green

1D-2700 Purple



9505 (4311)

1959 (889)

2852 (1294)

1911 (867)

2783 (1262)

1D-2700Purple

1D-3600Green

1D-2700 Purple



9505 (4309)

1959 (889)

2852 (1294)

1911 (867)

2783 (1262)

1D-2700Purple

1D-3600Green

1D-2700 Purple


NOTE: ID 2040, ID 2700 and ID 3600 have four same color springs per housing.

IMM 1157 WGS 130A to 190A 7

Table 3, Weights & Vibration Isolators, Packaged Unit, w/ Sound Enclosure

ARRANGEMENT WGS-AW, WITH WATER-COOLED CONDENSERS, WITH SOUND ENCLOSURE

CORNER WEIGHT LBS (KG)

SPRING-FLEX MOUNTINGS RUBBER-IN-SHEAR MOUNTINGS UNIT SIZE

OPR. WT. Lbs. (kg)

1 2 3 4 1 2 3 4 1 2 3 4


9205

4179

1928

875

2730

1239

1882

854

2665

1210

1D-2700

Purple

1D-3600

Green

1D-2700

Purple

1D-3600

Green Brick Red Lime Brick

Red Lime


9205

4179

1928

875

2730

1239

1882

854

2665

1210

1D-2700

Purple

1D-3600

Green

1D-2700

Purple

1D-3600

Green Brick Red Lime Brick

Red Lime


9962

4523

2060

935

2979

1352

2013

914

2910

1321

1D-2700

Purple

1D-3600

Green

1D-2700

Purple

1D-3600

Green Lime Charcoal Lime Charcoal


10153

4609

2109

957

3026

1374

2061

936

2957

1342

1D-2700

Purple

1D-3600

Green

1D-2700

Purple

1D-3600



10153

4609

2109

957

3026

1374

2061

936

2957

1342

1D-2700

Purple

1D-2700

Green

1D-2700

Purple

1D-2700


NOTE: ID 2700 and ID 3600 have four same-color springs per housing.

Table 4, Weights & Vibration Isolators, Remote Condenser, Without Sound Enclosure ARRANGEMENT WGS-AA, FOR REMOTE CONDENSER, WITHOUT SOUND ENCLOSURE (SEE NOTE)

CORNER WEIGHT LBS (KG) SPRING-FLEX MOUNTINGS RUBBER-IN-SHEAR MOUNTINGSUNIT SIZE

OPR. WT. LBS. (KG) 1 2 3 4 1 2 3 4 1 2 3 4

RP-4 RP-4 RP-4 RP-4 130AA

6265 (2842)

1572 (713)

1603 (727)

1530 (694)

1560 (708)

1D-2040Black

1D-2040Black

1D-2040Black

1D-2040Black Brick

Red Brick Red

Brick Red

Brick Red


6265 (2842)

1572 (713)

1603 (727)

1530 (694)

1560 (708)

1D-2040Black

1D-2040Black

1D-2040Black

1D-2040Black Brick

Red Brick Red

Brick RedBrick Red


7022 (3185)

1752 (794)

1800 (818)

1708 (775)

1758 (797)

1D-2040Black

1D-2040Black

1D-2040Black

1D-2040Black Brick

Red Brick Red

Brick RedBrick Red


7022 (3185)

1752 (794)

1800 (818)

1708 (775)

1758 (797)

1D-2040Black

1D-2040Black

1D-2040Black

1D-2040Black Brick

Red Brick Red

Brick RedBrick Red


7022 (3185)

1752 (794)

1800 (818)

1708 (775)

1758 (797)

1D-2040Black

1D-2040Black

1D-2040Black

1D-2040Black Brick

Red Brick Red

Brick RedBrick Red

NOTE: ID 2040 has four same-color springs per housing.

Table 5, Weights & Vibration Isolators, Remote Condenser, With Sound Enclosure ARRANGEMENT WGS-AA, FOR REMOTE CONDENSER, WITH SOUND ENCLOSURE (SEE NOTE)

CORNER WGT LBS (KG)

SPRING-FLEX MOUNTINGS RUBBER-IN-SHEAR

MOUNTINGS UNIT SIZE

OPR. WT. LBS. (KG)

1 2 3 4 1 2 3 4 1 2 3 4 RP-4 RP-4 RP-4 RP-4

130AA 6913 3139

1722 782

1777 807

1680 763

1734787

1D-2040 Black

1D-2040Black

1D-2040Black

1D-2040Black Brick

Red Brick Red

Brick Red

Brick Red


6913 3139

1722 782

1777 807

1680 763

1734787

1D-2040 Black

1D-2040Black

1D-2040Black

1D-2040Black Brick

Red Brick Red

Brick Red

Brick Red


7666 3480

1902 864

1974 896

1858 844

1932877

1D-2040 Black

1D-2040Black

1D-2040Black

1D-2040Black Brick

Red Brick Red

Brick Red

Brick Red


7666 3480

1902 864

1974 896

1858 844

1932877

1D-2040 Black

1D-2040Black

1D-2040Black

1D-2040Black Brick

Red Brick Red

Brick Red

Brick Red

RP-4 RP-4 RP-4 RP-4 190AA 7666

3480 1902 864

1974 896

1858 844

1932877

1D-2040 Black

1D-2040Black

1D-2040Black

1D-2040Black

Brick Red

Brick Red

Brick Red

Brick Red

NOTE: ID 2040 has four same color springs per housing.

8 WGS 130A to 190A IMM1157

Table 6, Isolator Kit Part Numbers Model AW, w/o

Sound Enclosure WGS 130AW WGS 140AW WGS 160AW WGS 170AW WGS 190AW

Spring Part Number 332320601 332320601 332320602 332320602 332320602

R-I-S Part Number 332325601 332325601 332325601 332325601 332325601

Model AW, w Sound

Enclosure WGS 130AW WGS 140AW WGS 160AW WGS 170AW WGS 190AW


R-I-S Part Number 332325601 332325601 332325602 33232562 332325602

Model AA, w/o

Sound Enclosure WGS 130AA WGS 140AA WGS 160AA WGS 170AA WGS 190AA


R-I-S Part Number 332325603 332325603 332325603 332325603 332325603

Model AA, w/ Sound Enclosure

WGS 130AA WGS 140AA WGS 160AA WGS 170AA WGS 190AA


R-I-S Part Number 332325603 332325603 332325603 332325603 332325603

NOTE: Model AW = packaged, water-cooled, Model AA = remote condenser, air-cooled

Figure 3, CP-4, Spring Flex Mounting Figure 4, RP-4, R-I-S Mounting

NOTES:

MOUNT MATERIAL TO BE DURULENE RUBBER.1.

MOLDED STEEL AND ELASTOMER MOUNT FOR2.OUTDOOR SERVICE CONDITIONS.

3. RP-4 MOUNT VERSION WITH STUD IN PLACE.ALL DIMENSIONS ARE IN DECIMAL INCHES

DRAWING NUMBER 3314814

1.13 ± .25APPROX.

1.63

.38

DURULENEMATERIAL

RAISED GRIP RIBS

3.00

3.75

5.00

6.25

3.87.56 TYP.

4.63

R.28TYP.

R.250 TYP.

R.750 TYP.RECESSEDGRIP RIBS

ø .500-13NC-2B

R4

R4

VM

&C

VM

&C

IMM 1157 WGS 130A to 190A 9

Figure 5, WGS-AA, Remote Condenser Configuration

Discharge Connections

Liquid Return Connections

10 WGS 130A to 190A IMM1157

Water Piping

Vessel Drains at Start-up Evaporators are drained of water in the factory and shipped with an open ball valve in the drain hole. The drain is located on the bottom of the vessel. Be sure to close the valve prior to filling the vessel with fluid.

Condensers: Units are drained of water in the factory and are shipped with condenser drain plugs in the heads removed and stored in a bag in the control panel. Be sure to replace plugs prior to filling the vessel with fluid.

General Due to the variety of piping practices, follow the recommendations of local authorities for code compliance. They can supply the installer with the proper building and safety codes required for a proper installation.

The piping should be designed with a minimum number of bends and changes in elevation to keep system cost down and performance up. Other piping design considerations include:

1. All piping should be installed and supported to prevent the chiller connections from bearing any strain or weight of the system piping.

2. Vibration eliminators to reduce vibration and noise transmission to the building.

3. Shutoff valves to isolate the unit from the piping system during unit servicing.

4. Manual or automatic air vent valves at the high points of the system. Drains should be placed at the lowest points in the system.

5. Some means of maintaining adequate system water pressure (e.g., expansion tank or regulating valve).

6. Temperature and pressure indicators located within 3 feet (0.9 meters) of the inlet and outlet of the vessels to aid in unit servicing.

7. A strainer or some means of removing foreign matter from the water before it enters the pump. It should be placed far enough upstream to prevent cavitation at the pump inlet (consult pump manufacturer for recommendations). A strainer can prolong pump life and help maintain system performance.

Important Note A cleanable 20-mesh strainer must also be placed in the water line just prior to the inlet of the evaporator. This will aid in preventing foreign material from entering the unit and decreasing the performance of the evaporator.

8. If the unit is used as a replacement chiller on a previously existing piping system, flush the system thoroughly prior to unit installation. Regular water analysis and chemical water treatment on the evaporator and condenser are recommended immediately upon equipment start-up.

9. In the event glycol is added to the water system as an afterthought for freeze protection, recognize that the refrigerant suction pressure will be lower, cooling performance will be less, and water side pressure drop will be higher. If the percentage of glycol is large, or if propylene glycol is used instead of ethylene glycol, the added pressure drop and loss of performance could be substantial. Reset the freezestat and low leaving water alarm temperatures. The freezestat is factory set to default at 32°F (0°C). Reset the freezestat setting to approximately 8° to 10°F (4.4° to 5.5°C) below the leaving chilled water setpoint temperature. See the section titled “Glycol Solutions” on page 13 for additional information concerning the use of glycol.

10. Make a preliminary leak check of the water piping before filling the system.

IMM 1157 WGS 130A to 190A 11

! WARNING

This unit contains POE lubricants that must not come into contact with any surface or material that might be harmed by POE, including certain polymers (e.g. PVC/CPVC and polycarbonate piping).

Note: A water flow switch or pressure differential switch must be mounted in the evaporator outlet water line to signal that there is water flow before the unit will start.

Figure 6, Typical Field Evaporator Water Piping

Vent

Drain

GateValve

WaterStrainer

VibrationEliminatorValved

PressureGauge

In

OutProtect All Field Piping

Against Freezing

Flow

VibrationEliminator

FlowSwitch

BalancingValve

GateValve

Flow

NOTE: Water piping must be supported independently from the unit.

System Water Volume All chilled water systems need adequate time to recognize a load change, respond to that load change and stabilize, without undesirable short cycling of the compressors or loss of control. In air conditioning systems, the potential for short cycling usually exists when the building load falls below the minimum chiller plant capacity or on close-coupled systems with very small water volumes.

Some of the things the designer should consider when looking at water volume are the minimum cooling load, the minimum chiller plant capacity during the low load period and the desired cycle time for the compressors.

Assuming that there are no sudden load changes and that the chiller plant has reasonable turndown, a rule of thumb of “gallons of water volume equal to two to three times the chilled water gpm flow rate” is often used.

A properly designed storage tank should be added if the system components do not provide sufficient water volume.

Variable Chilled Water Flow Reducing chilled water flow in proportion to load can reduce total system power consumption. Certain restrictions apply to the amount and rate of flow change. The rate of flow change should be a maximum of 10 percent of the change, per minute. Do not reduce flow lower than the minimum flows listed in the pressure drop data on page 16.

Chilled Water Piping The system water piping must be flushed thoroughly prior to making connections to the unit evaporator. A 1.0 mm (16 to 20 mesh) strainer must be installed in the return water line before the inlet to the chiller. Lay out the water piping so the chilled water circulating pump discharges into the evaporator inlet.

12 WGS 130A to 190A IMM1157

The return water line must be piped to the evaporator inlet connection and the supply water line must be piped to the evaporator outlet connection. If the evaporator water is piped in the reverse direction, a substantial decrease in capacity and efficiency of the unit will be experienced.

A flow switch must be installed in the horizontal piping of the supply (evaporator outlet) water line to prove water flow before starting the unit.

Provide drain connections at all low points in the system to permit complete drainage. Air vents should be located at the high points in the system to purge air out of the system. The evaporator is equipped with vent and drain connections.

Install pressure gauges in the inlet and outlet water lines to the evaporator. Pressure drop through the evaporator can be measured to determine water flow from the flow/pressure drop curves on page 16. Vibration eliminators are recommended in both the supply and return water lines.

Insulate chilled water piping to reduce heat loss and prevent condensation. Perform complete unit and system leak tests prior to insulating the water piping. Insulation with a vapor barrier is recommended. If the vessel is insulated, the vent and drain connections must extend beyond the proposed insulation thickness for accessibility.

Flow Switch Field Installed A water flow switch must be mounted in the leaving evaporator and condenser water line to prove adequate water flow before the unit can start. This will protect against slugging the compressors on start-up. It also serves to shut down the unit in the event that water flow is interrupted to guard against evaporator freeze-up.

A flow switch is available from Daikin under part number 01750330. It is a “paddle” type switch and adaptable to any pipe size from 1 in. (25 mm) to 6 in. (152 mm) nominal. Certain flow rates are required to open the switch and are listed in Table 7. Switch terminals Y and R should be made to panel terminals 60 and 67 (chilled water) and 60 and 76 (condenser water). There is also a set of normally closed contacts on the switch that could be used for an indicator light or an alarm to indicate when a “no flow” condition exists. 1. Apply pipe sealing compound to only the threads of the switch and screw unit into the

1-in. (25-mm) reducing tee. The flow arrow must be pointed in the correct direction.

2. Piping should provide a straight length before and after the flow switch of at least fivetimes the pipe diameter without any valves, elbows, or other flow restricting elements.

3. Trim the flow switch paddle if needed, to fit the pipe diameter. Make sure the paddledoes not hang up in the pipe.

! CAUTION

Make sure the arrow on the side of the switch is pointed in the direction of flow. Connect the flow switch according to the wiring diagram (see wiring diagram inside control box door). Incorrect installation will cause improper operation and possible evaporator damage.

IMM 1157 WGS 130A to 190A 13

Table 7, Flow Switch Flow Rates inch 1 1/4 1 1/2 2 2 1/2 3 4 5 6 8 Pipe Size

(NOTE !) mm 32 (2) 38 (2) 51 63 (3) 76 102 (4) 127 (4) 153 (4) 204 (5) gpm 5.8 7.5 13.7 18.0 27.5 65.0 125.0 190.0 205.0 Flow Lpm 1.3 1.7 3.1 4.1 6.2 14.8 28.4 43.2 46.6 gpm 3.7 5.0 9.5 12.5 19.0 50.0 101.0 158.0 170.0

Min. Adjst. No

Flow Lpm 0.8 1.1 2.2 2.8 4.3 11.4 22.9 35.9 38.6 gpm 13.3 19.2 29.0 34.5 53.0 128.0 245.0 375.0 415.0 Flow Lpm 3.0 4.4 6.6 7.8 12.0 29.1 55.6 85.2 94.3 gpm 12.5 18.0 27.0 32.0 50.0 122.0 235.0 360.0 400.0

Max. Adjst. No

Flow Lpm 2.8 4.1 6.1 7.3 11.4 27.7 53.4 81.8 90.8

NOTES: 1. A segmented 3-inch paddle (1, 2, and 3 inches) is furnished mounted, plus a 6-inch paddle loose. 2. Flow rates for a 2-inch paddle trimmed to fit the pipe. 3. Flow rates for a 3-inch paddle trimmed to fit the pipe. 4. Flow rates for a 3-inch paddle. 5. Flow rates for a 6-inch paddle

Optional Factory-Mounted The chiller may be equipped with the optional factory-mounted flow switch. The 24 Vac powered flow sensors are a solid state alternative to mechanical switches for sensing the acceptable flow rate of water. The flow sensors are extremely reliable with no moving parts that can become stuck or break in the flow process. These compact units are constructed of corrosion-resistant materials and 316 stainless steel parts and are factory-installed directly through a ¼ inch NPT into the flow. No field adjustments are required. The flow sensors operate on the calorimetric principle. The sensors use the cooling effect of a flowing fluid to provide reliable flow rate detection of liquids over a very wide flow range. The amount of thermal energy that is removed from the tip determines the local flow rate and when it exceeds a setpoint it changes the output-state.

Glycol Solutions When using a glycol solution, the chiller capacity, flow rate, evaporator pressure drop, and chiller power input can be calculated using the following formulas. Refer to Table 8 for ethylene glycol and Table 9 for propylene glycol. Capacity, Capacity is reduced compared to that of plain water. To find the reduced value, multiply the chiller’s capacity when using water by the capacity correction factor C to find the chiller’s capacity when using glycol. Flow, Multiply the water flow by the G correction factor to determine the glycol flow required to give the same Delta-T as water.

To determine evaporator gpm (or T) knowing T (or gpm) and capacity:

TablesFromGCorrectionFlowxT

CapacityGlycolxGPMGlycol

24

For Metric Applications -- Determine evaporator lps (or T) knowing T (or lps) and kW:

TablesfromGCorrectionFlowxTx

kWLpsGlycol

18.4

Pressure Drop, To determine glycol pressure drop through the cooler, enter the water pressure drop graph on page 16 at the actual glycol flow. Multiply the water pressure drop found there by correction factor P to obtain corrected glycol pressure drop. Power, To determine glycol system kW, multiply the water system kW by factor K.

14 WGS 130A to 190A IMM1157

Test coolant with a clean, accurate, glycol solution hydrometer (similar to that found in service stations) to determine the freezing point. Obtain percent glycol from the freezing point found in Table 8. On glycol applications the supplier normally recommends that a minimum of 25% solution by weight be used for protection against corrosion or the use of additional inhibitors.

Note: The effect of glycol in the condenser is negligible. As glycol increases in temperature, its characteristics have a tendency to mirror those of water. Therefore, for selection purposes, there is no derate in capacity for glycol in the condenser.

Table 8, Ethylene Glycol Freeze Point % Ethylene

Glycol °F °C C Capacity K Power G Flow P Pressure Drop

10 26 -3.3 0.996 0.999 1.035 1.096 20 18 -7.8 0.986 0.998 1.060 1.219 30 7 -13.9 0.978 0.996 1.092 1.352 40 -7 -21.7 0.966 0.993 1.131 1.530 50 -28 -33.3 0.955 0.991 1.182 1.751

Table 9, Propylene Glycol Freeze Point % Percent

Glycol °F °C C Capacity K Power G Flow P Pressure Drop

10 26 -3 0.987 0.992 1.010 1.068 20 19 -7 0.975 0.985 1.028 1.147 30 9 -13 0.962 0.978 1.050 1.248 40 -5 -21 0.946 0.971 1.078 1.366 50 -27 -33 0.929 0.965 1.116 1.481

! CAUTION

Do not use automotive grade antifreeze. Industrial grade glycols must be used. Automotive antifreeze contains inhibitors, which cause plating on copper tubes. The type and handling of glycol used must be consistent with local codes.

Condenser Water Piping Arrange the condenser water so the water enters the condensers’ bottom connections or the single bottom manifold connection if the optional manifold has been ordered. The condenser water will discharge from the top condenser connections or the single top connection of the optional manifold. Failing to arrange the condenser water as stated above will negatively affect the capacity and efficiency.

Install pressure gauges in the inlet and outlet water lines to the condenser. Pressure drop through the condenser should be measured to determine flow on the pressure drop/flow curves on page 17. Vibration eliminators are recommended in both the supply and return water lines.

Water-cooled condensers can be piped for use with cooling towers or well water. Cooling tower applications should be made with consideration of freeze protection and scaling problems. Contact the cooling tower manufacturer for equipment characteristics and limitations for the specific application.

Head pressure control must be provided if the entering condenser water can fall below the curve values on page Error! Bookmark not defined.. The MicroTech II unit controller can provide this function, using entering condenser water as the control point. The control will work with or without the optional condenser manifolds. The water sensors are factory-installed.

IMM 1157 WGS 130A to 190A 15

The controller setpoints have to be adjusted for water control and certain output connections made to the tower components. See the operating manual OM WGS and the field wiring diagram in this manual for further details.

Condenser Water Sensors Packaged WGS chillers are supplied with one ECWT sensor and one LCWT sensor. The option the unit is ordered with will determine the sensor location requirements. Listed below are the two possibilities.

WGS Ordered Without the Condenser Manifold: If the unit is ordered without the condenser manifold option, the entering and leaving water sensors will have to be field-installed in their respective condenser water piping, at a common location. Since each WGS is supplied with an independent condenser vessel per refrigerant circuit, the water temperature sensors must be installed in a location prior to the water piping split on the entering water side and after the piping is rejoined on the leaving water side. The sensors ship with the chiller, temporarily attached to the condenser vessel. The sensors will be landed on the control panel end and provided with additional lead length for field installation.

WGS Ordered With the Condenser Manifold: If the unit is ordered with the condenser manifold option, both sensors will be factory-installed in the manifolds.

Water Pressure Drop The vessel flow rates must fall between the minimum and maximum values shown on the appropriate evaporator and condenser curves. Flow rates below the minimum values shown will result in laminar flow that will reduce efficiency, cause erratic operation of the electronic expansion valve and could cause low temperature cutoffs. On the other hand, flow rates exceeding the maximum values shown can cause erosion in the evaporator and condenser.

Measure the chilled water pressure drop through the evaporator at field-installed pressure taps. It is important not to include valves or strainers in these readings.

16 WGS 130A to 190A IMM1157

Figure 7, Evaporator Pressure Drop WGS 130 – WGS 190

WGS 160, 170, 190

WGS 130, 140

Minimum Flow Nominal Flow Maximum Flow

Flow Rate Pressure Drop Flow Rate Pressure Drop Flow Rate Pressure Drop WGS Model

gpm L/s Ft. kPa gpm L/s Ft. kPa gpm L/s Ft. kPa

130AW/AA 195 12.3 5.8 17.4 312 19.7 13.5 40.4 520 32.9 33.9 101.1

140AW/AA 211 13.4 6.7 20.0 338 21.4 15.6 46.6 563 35.6 39.0 116.5

160AW/AA 235 14.9 4.6 13.8 376 23.8 10.8 32.3 627 39.7 27.3 81.6

170AW/AA 254 16.1 5.3 15.9 407 25.8 12.5 37.3 678 42.9 31.6 94.2

190AW/AA 273 17.3 6.1 18.1 437 27.7 14.2 42.5 728 46.1 35.9 107.2

Note: Minimum, nominal, and maximum flows are at a 16F, 10F, and 6F chilled water temperature range respectively and at ARI tons.

IMM 1157 WGS 130A to 190A 17

Figure 8, Condenser Pressure Drop WGS 130 – WGS 190

WGS 130, 140, 160with Manifold

WGS 130, 140, 160without Manifold

WGS 170, 190with Manifold

WGS 170, 190without Manifold

Pressure Drop Without Optional Condenser Manifold




130AW 304 19.2 4.1 12.2 390 24.7 6.5 19.3 650 41.1 16.0 47.9

140AW 304 19.2 4.1 12.2 422 26.7 7.4 22.2 704 44.5 18.5 55.1

160AW 304 19.2 4.1 12.2 470 29.8 9.0 26.9 784 49.6 22.4 66.8

170AW 372 23.5 4.3 12.8 509 32.2 7.9 23.7 848 53.7 19.8 59.1

190AW 372 23.5 4.3 12.8 546 34.6 9.0 26.9 911 57.6 22.5 67.1

Pressure Drop With Optional Condenser Manifold




130AW 304 19.2 4.7 14.0 390 24.7 7.4 22.0 650 41.1 18.5 55.1

140AW 304 19.2 4.7 14.0 422 26.7 8.5 25.3 704 44.5 21.3 63.5

160AW 304 19.2 4.7 14.0 470 29.8 10.3 30.7 784 49.6 25.8 77.1

170AW 372 23.5 5.3 15.8 509 32.2 9.4 28.1 848 53.7 23.8 71.1

190AW 372 23.5 5.3 15.8 546 34.6 10.7 32.0 911 57.6 27.1 80.9

18 WGS 130A to 190A IMM1157

Refrigerant Piping

Unit with Remote Condenser General For remote condenser application (WGS-AA), the chillers are shipped with a nitrogen/helium holding charge of 20 psi is used to pressurize the system with a slight positive pressure to prevent contaminants from entering the unit. This holding charge should not be mistaken as a refrigerant charge, and can not be used as part of the final total refrigerant charge. After installation, the unit should be pressurized and tested for leaks, vacuumed and charged with the correct refrigerant operating charge, taking into consideration the length of refrigerant piping. The operating charge is field-supplied and charged for remote condenser models. It is important that the unit be kept tightly closed until the remote condenser is installed and piped to the unit. It is the contractor’s responsibility to install the interconnection piping, leak-test the entire system, evacuate the system, and supply the system refrigerant charge. The system should be held under vacuum until it is charged under supervision of the Daikin authorized service technician who will supervise unit commissioning. The unit operating charge (less piping and condenser) can be found on page 26.

! IMPORTANT NOTE !

Service Form SF99006 and an isometric sketch of the Remote Piping Layout showing pipe size, location of fittings, measured lengths and elevations MUST BE SUBMITTED TO Daikin Technical Response Center and reviewed before order entry. Daikin Factory Service will not perform startup without reviewed Service Form SF99006 and

drawing. Installation must match reviewed drawing.

All field piping, wiring and procedures must comply with design guidelines set forth in the product literature, and be performed in accordance with ASHRAE, EPA, local codes and industry standards and per included sizing tables. Any product failure caused, or contributed to, by failure to comply with appropriate design guidelines will not be covered by

manufacturer’s warranty.

Daikin Technical Response: Fax: 763-509-7666; Phone : 540-248-9201; e-mail: [email protected]

The following notes apply to all size units:

Maximum linear line length shall not exceed 75 feet. Maximum Total Equivalent Length (TEL) shall not exceed 180 feet. The condenser shall not be located more than 15 feet above the indoor unit. The condenser shall not be located more than 20 feet below the indoor unit. No underground piping.

It is important that the unit piping be properly supported with sound and vibration isolation between tubing and hanger, and that the discharge lines be looped at the condenser and trapped at the compressor to prevent refrigerant and oil from draining into the compressors. Looping the discharge line also provides greater line flexibility.

The discharge gas valves, liquid line solenoids, filter-driers, moisture indicators, and thermostatic expansion valves are all factory-mounted as standard equipment with the water chiller.

After the equipment is properly installed, leak tested, and evacuated, it can be charged with R-134a and started under Daikin service supervision. Total operating charge will depend on the air-cooled condenser used and volume of the refrigerant piping.

Note: On the arrangement WGS-AA units (units with remote condensers), the installer must record the refrigerant charge by stamping the total charge and the charge per circuit on the serial plate in the appropriate blocks provided for this purpose.

mailto:[email protected]�

IMM 1157 WGS 130A to 190A 19

The following discussion is intended for use as a general guide to the piping of air-cooled and evaporative condensers.

Use the tables shown in this manual for sizing the discharge and liquid lines. Discharge lines must be designed to handle oil properly and to protect the compressor from damage that can result from condensing liquid refrigerant in the line during shutdown. Careful consideration must be given for sizing each section of piping so that gas velocities are sufficient at all operating conditions to carry oil. If the velocity in a vertical discharge riser is too low, considerable oil can collect in the riser and the horizontal header, causing the compressor to lose its oil and result in damage due to lack of lubrication. When the compressor load is increased, the oil that had collected during reduced loads can be carried as a slug through the system and back to the compressor, where a sudden increase of oil concentration can cause liquid slugging and damage to the compressor.

Any horizontal run of discharge piping should be pitched away from the compressor approximately 1/8-inch per foot (10.4 mm per m) or more. This is necessary to move, by gravity, any oil lying in the header.

Any discharge line coming into a horizontal discharge header should rise above the centerline of the discharge header. This is necessary to prevent liquid refrigerant from draining from the condenser when the compressor is not operating. If the compressors are lower than the condenser, or refrigerant migration is possible, a check valve should be installed at the condenser.

A check/relief valve may be necessary in the liquid line at the condenser for applications where the liquid line is higher than the condensing unit or where refrigerant migration is an issue. The liquid line should be insulated when it is routed where the ambient exposure is higher than the condenser’s ambient temperature. A relief device may also be required in the discharge line piping.

Figure 9 illustrates a typical piping arrangement involving a remote air-cooled condenser located at a higher elevation than the compressor. This arrangement is commonly encountered when the air-cooled condenser is on a roof and the compressor is on grade level or in a basement equipment room.

Notice in Figure 9 that the discharge line is looped at the bottom and top of the vertical run. This is done to prevent oil and condensed refrigerant from flowing back into the compressor and causing damage. The highest point in the discharge line should always be above the highest point in the condenser coil. Include a purging vent at this point to extract non-condensables from the system. This method should also be employed if the air-cooled condenser is located on the same level as the compressor.

Head Pressure Control The MicroTech II circuit controllers are capable of controlling the fans of remote air-cooled condensers connected to each of the unit’s two refrigerant circuits. Control is based on condensing temperature and uses a combination of fan variable frequency drive (VFD) and fan cycling.

Recommended Refrigerant Pipe Sizes NOTES: 1. Pressure drop is in equivalent degrees F. 2. On WGS 140 and 170, the # 1 circuit is always the smallest and is closest to the control panel.

Horizontal or Downflow Discharge Line Sizes

Recommended Discharge Line Size, inch, O.D.

Up to Up to Up to Up to Up to Unit, Circuit

Nominal

Circuit

Tons

Conn.

Size

At Unit 50 Equiv.Ft 75 Equiv.Ft 100 Equiv.Ft. 125 Equiv.Ft. 150 Equiv.Ft.

WGS 130, Both Line Size 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

WGS 140, Cir #1 65 2 5/8

Press Drop, F 0.55 0.82 1.10 1.37 1.64

WGS 140, Cir #2

WGS 160, Both

WGS 170, Cir #1

80 2 5/8 Line Size

Press Drop, F2 5/8

0.80

2 5/8

1.21

2 5/8

1.61

2 5/8

2.01

3 1/8

1.04

WGS 170, Cir #2 Line Size 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8

WGS 190, Both 95 2 5/8

Press Drop, F 1.08 1.62 2.16 1.17 1.40

20 WGS 130A to 190A IMM1157

Recommended Vertical Upflow Discharge Line Sizes

Recommended Discharge Line Size, inch,

O.D.

Up to Up to Up to Unit, Circuit

Nominal

Circuit

Tons

Connection

Size, O.D.

at WGS Unit 50 Equiv. Ft 75 Equiv. Ft 100 Equiv. Ft.

WGS 130, Both Line Size 2 1/8 2 1/8 2 1/8

WGS 140, Cir #1 65 2 5/8

Press Drop, F 1.52 2.28 3.03

WGS 140, Cir #2

WGS 160, Both

WGS 170, Cir #1

80 2 5/8 Line Size

Press Drop, F

2 5/8

0.80

2 5/8

0.99

2 5/8

1.32

WGS 170, Cir #2 Line Size 2 5/8 2 5/8 2 5/8

WGS 190, Both 95 2 5/8

Press Drop, F 0.94 1.41 1.88

Recommended Liquid Line Size

Recommended Liquid Line Size, inch O.D.

Up to Up to Up to Up to Up to Unit, Circuit

Nominal

Circuit

Tons

Conn.

Size,

at Unit 50 Equiv.Ft 75 Equiv.Ft 100 Equiv.Ft. 125 Equiv.Ft. 150 Equiv.Ft.

WGS 130, Both Line Size 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8

WGS 140, Cir #1 65 1 3/8

Press Drop, F 0.76 1.14 1.52 1.89 2.27

WGS 140, Cir #2

WGS 160, Both

WGS 170, Cir #1

80 1 3/8 Line Size

Press Drop, F1 3/8

1.11

1 3/8

1.67

1 3/8

2.23

1 3/8

2.78

1 3/8

3.34

WGS 170, Cir #2 Line Size 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8

WGS190, Both 95 1 3/8

Press Drop, F 1.50 2.25 1.33 1.66 1.99

Figure 9, Condenser Above Compressor (One of Two Circuits Shown)

Condenser

Relief Valve

Check Valve (Preferred)

Pressure Tap

Discharge Line

Loop

P i t c h

To Evaporator

Maximum linear line length shall not exceed 75 ft.

Maximum Total Equivalent Length (TEL) shall not exceed 180 ft.

The condenser shall not be located more than 15 ft above the indoor unit.

The condenser shall not be located more than 20 ft below the indoor unit.

IMM 1157 WGS 130A to 190A 21

Factory-Mounted Condenser Units with the standard factory-mounted, water-cooled condensers are provided with complete refrigerant piping and full operating refrigerant charge at the factory.

There is a possibility on water-cooled units utilizing low temperature pond or river water as a condensing medium that if the water valves leak, the condenser and liquid line refrigerant temperature could drop below the equipment room temperature on the “off” cycle. This problem arises only during periods when cold water continues to circulate through the condenser and the unit remains off due to satisfied cooling load.

If this condition occurs:

1. Cycle the condenser pump off with the unit.

2. Check the liquid line solenoid valve for proper operation.

Relief Valve Piping The ANSI/ASHRAE Standard 15, Safety Standard for Refrigeration Systems, specifies that pressure relief valves on vessels containing Group 1 refrigerant (R-134a) “shall discharge to the atmosphere at a location not less than 15 feet (4.6 meters) above the adjoining ground level and not less than 20 feet (6.1 meters) from any window, ventilation opening or exit in any building.” The piping must be provided with a rain cap at the outside terminating point and with a drain at the low point on the vent piping to prevent water buildup on the atmospheric side of the relief valve. In addition, a flexible pipe section should be installed in the line to eliminate any piping stress on the relief valve(s).

The size of the discharge pipe from the pressure relief valve should not be less than the size of the pressure relief outlet. When two or more valves are piped together, the common header and piping to the atmosphere should not be less than the sum of the area of each of the lines connected to the header.

The locations of the unit relief valves are shown on the piping schematic drawing on page 27. There are six valves on the water-cooled units, one for each circuit on the compressor oil separator (54 lb. air/min., 350 psi), suction line (17.3 lb. air/min., 200 psi), and condenser (54 lb. air/min., 350 psi). Remote condenser models have four valves.

NOTE: Provide fittings to permit vent piping to be easily disconnected for inspection or replacement of the relief valve.

Figure 10, Relief Valve Piping

22 WGS 130A to 190A IMM1157

Dimensional Data

WGS-AW Water-Cooled

Figure 11, WGS 130AW through WGS 190AW Packaged Chiller

Without Optional Condenser Water Manifolds

330643201D010BWGS 130-190 Packaged

120.0" (3048.0)RECOMMENDED

CLEARANCE FOR

CONDENSERTUBE

SERVICING

114.8 (2915.9)

31.8(807.7)

169.9 (4315.5)

16.2(411.5)

4.0 IN. (101.6)SCH 40 PIPEVICTAULIC GROOVED.INLET AND OUTLET

WATER IN

WATER OUT

WATER OUT WATER IN

0 .88 (22.4) MOUNTING HOLES TYP. 4

VENT

DRAIN

RELIEF VALVES 1 PER CIRCUIT

RELIEFVALVES(ONE HIDDEN)

RELIEF VALVE

RELIEF VALVE

CIRC. #1 CIRC. #2

34.0(863.6)

“A”

CONTROL PANEL

EVAPORATOR

CONDENSER

FIELD POWERKNOCKOUTS

FIELD CONTROLKNOCKOUTS

20.5(520.7)

29.0(736.6)

8.3(210.8)

13.8(350.5)

LIFTING BRACKETS

REMOVABLE

LIFTING BRACKETS

REMOVABLE

“B”

“C”

“D”

“X”

“Y”

“Z”

11.75 (298.4)

14.75 (374.6)

Notes: 1. Unit water connection handing is oriented facing the control panel. 2. Unit shown with standard right-hand evaporator connections. Left-hand available as option. 3. Condenser connections available only as shown.

Dimensions

Inches (mm)

Evaporator

Victualic

Inches (mm)

Center of Gravity

Inches (mm)

Additions for Sound

Enclosure

Inches (mm)

WGS

Models

“A” “B” “C” “D” “X” “Y” “Z” Length Width Height

WGS 130AW-

140AW

74.6

(1894.8)

29.3

(744.2)

95.0

(2413.0)

6.0

(152.4)

83.9

(2131.1)

35.8

(909.3)

16.8

(426.7)

4.0

(101.6)

2.5

(63.5)

3.0

(76.2)

WGS 160AW-

190AW

76.6

(1945.6)

30.4

(772.2)

92.9

(2359.6)

8.0

(203.2)

84.0

(2133.6)

36.0

(914.4)

16.8

(426.7)

4.0

(101.6)

2.5

(63.5)

5.0

(127.0)

IMM 1157 WGS 130A to 190A 23

WGS-AW, Water-Cooled with Optional Condenser Manifolds

Figure 12 WGS 130AW through 190AW with Optional Condenser Manifolds

330643601D010BWGS 130-190 w/Manifold

114.8 (2915.9)

“C”

31.8(807.7)

“B”

35.0 (889.0)

32.0 (812.8)

“X”

169.9 (4315.5)

16.2(411.5)

4.0 IN. (101.6)SCH 40 PIPEVICTAULIC GROOVED.INLET AND OUTLET

WATER IN

WATER OUT

WATER OUT WATER IN

0 .88 (22.4) MOUNTING HOLES TYP. 4

VENT

DRAIN

RELIEF VALVES 1 PER CIRCUIT

RELIEFVALVES(ONE HIDDEN)

RELIEF VALVE RELIEF VALVE

CIRC. #1 CIRC. #2

“Y”

“Z”

34.0(863.6)

“A”

CONTROL PANEL

EVAPORATOR

CONDENSER



20.5(520.7)

29.0(736.6)0

8.3(210.8)

13.8(350.5)

REMOVABLE LIFTING

BRACKETS

REMOVABLE LIFTING

BRACKETS

“D”

Notes: 1. Unit water connection handing is oriented facing the control panel. 2. Unit shown with standard right-hand evaporator connections. Left-hand available as option. 3. Condenser connections available only as shown.

Dimensions

Inches (mm)

Evaporator

Victualic

Inches (mm)

Center of Gravity

Inches (mm)

Additions for Sound

Enclosure

Inches (mm)

WGS

Models

“A” “B” “C” “D” “X” “Y” “Z” Length Width Height

WGS 130AW-

140AW

74.6

(1894.8)

29.3

(744.2)

95.0

(2413.0)

6.0

(152.4)

83.9

(2131.1)

35.8

(909.3)

16.8

(426.7)

4.0

(101.6)

2.5

(63.5)

3.0

(76.2)

WGS 160AW-

190AW

76.6

(1945.6)

30.4

(772.2)

92.9

(2359.6)

8.0

(203.2)

84.0

(2133.6)

36.0

(914.4)

16.8

(426.7)

4.0

(101.6)

2.5

(63.5)

5.0

(127.0)

24 WGS 130A to 190A IMM1157

WGS-AA Remote Condenser

Figure 13, Dimensions, WGS 130AA through WGS 190AA Remote Condenser

330643401D010BWGS 130-190 Less Condenser

179.3 (4554.2)

“C”

12.0(304.8)

155.3 (3944.6)

6.00 SCH 40 PIPEfor WGS 130-140

8.00 SCH 40 PIPEFOR WGS 160-190

VICTAULIC GROOVEDINLET AND OUTLET

WATER INWATER OUT

18.0(457.2)

“B”

“X”

0 .88 MOUNTINGHOLES 4 PLACES

LIFTING HOLES4 PLACES

CIRC. #2

VENT

DRAIN

RELIEF VALVES(ONE HIDDEN)

RELIEF VALVERELIEF VALVE

“Z”

“Y”

34.0 (863.6)

“A”

CONTROLPANEL



19.3(490.2)

32.0 (812.8)

“F”

“E”“D”

77.8 (1976.1)85.6 (2174.2)

EVAPORATOR

0 2.625" DISCHARGE #2FIELD CONNECTION

0 2.625" DISCHARGE #1FIELD CONNECTION

0 1.375" LIQUID #1FIELD CONNECTION

0 1.375" LIQUID #2FIELD CONNECTION

CIRC. #1

REARVIEW

FRONTVIEW

Notes: 1. Unit water connection handing is oriented facing the control panel. 2. Unit shown has right hand evaporator water connections.

Dimensions Inches (mm)

Center of Gravity Inches (mm)

Additions for Sound Enclosure

Inches (mm) WGS

Models “A” “B” “C” “D” “E” “F” “X” “Y” “Z” Length Width Height

WGS 130-

140AW

60.8 (1544.3)

38.1 (967.7)

95.0 (2413.0)

33.1 (840.7)

26.1 (662.9)

19.7 (500.4)

92.3 (2344.4)

32.3 (820.4)

16.8 (426.7)

4.0 (101.6)

2.5 (63.5)

3.0 (76.2)

WGS 160-

190AW

62.8 (1595.1)

39.6 (1005.8)

92.9 (2359.7)

32.7 (830.6)

25.7 (652.8)

21.7 (551.2)

92.5 (2349.5)

32.5 (825.5)

16.7 (424.2)

4.0 (101.6)

2.5 (63.5)

5.0 (127.0)

IMM 1157 WGS 130A to 190A 25

Physical Data

WGS-AW, Water-Cooled

Table 10, WGS-130AW - WGS-190AW WGS UNIT SIZE 130AW 140AW 160AW 170AW 190AW

Unit capacity @ ARI conditions tons, (kW) (1)

130.0 (457.1) 140.7 (494.7) 156.7 (551.0) 169.6 (596.3) 182.1 (640.3)

No. Circuits 2 2 2 2 2

COMPRESSORS, Frame 3

Nominal Horsepower 65 65 65 80 80 80 80 95 95 95 Number (2) 1 1 1 1 1 1 1 1 1 1 % Minimum Capacity (Modulated) 15 13/17 15 14/16 15 Oil Charge per Compressor oz., (l) 256 (7.6) 256 (7.6) 256 (7.6) 256 (7.6) 256 (7.6)

CONDENSER

Number 2 2 2 2 2 No. Refrigerant Circuits 1 1 1 1 1 Diameter, in., (mm) 12 (305) 12 (305) 12 (305) 12 (305) 12 (305) Tube Length, in., (mm) 120 (3048) 120 (3048) 120 (3048) 120 (3048) 120 (3048)

Design W.P. psig, (kPa): Refrigerant Side 350 (2413) 350 (2413) 350 (2413) 350 (2413) 350 (2413)

Water Side 150 (1034) 150 (1034) 150 (1034) 150 (1034) 150 (1034)

No. of Passes 2 2 2 2 2 Pump-Out Capacity per Circuit, lb., (kg) (3)

330 (150) 330 (150) 330 (150) 296 (134) 296 (134)

Connections: Water In & Out, in, (mm) victaulic 4.0 (101) 4.0 (101) 4.0 (101) 4.0 (101) 4.0 (101) Relief Valve, In., (mm) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7) Purge Valve, Flare In., (mm) .625 (15.9) .625 (15.9) .625 (15.9) .625 (15.9) .625 (15.9) Vent & Drain, in. (mm) FPT 0.5 (12.7) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7) Liquid Subcooling Integral Integral Integral Integral Integral

EVAPORATOR

Number 1 1 1 1 1 No. Refrigerant Circuits 2 2 2 2 2 Water Volume, gallons, (l) 68 (257) 68 (257) 115 (435) 115 (435) 115 (435) Refrig. Side D.W.P., psig, (kPa) 354 (2441) 354 (2441) 354 (2441) 354 (2441) 354 (2441) Water Side D.W.P., psig, (kPa) 152 (1048) 152 (1048) 152 (1048) 152 (1048) 152 (1048) Water Connections: Inlet & Outlet, in., (mm) victaulic 6.0 (152) 6.0 (152) 8.0 (203) 8.0 (203) 8.0 (203) Drain & Vent (NPT INT.) 0.5 0.5 0.5 0.5 0.5

UNIT DIMENSIONS (4)

Length In., (mm) 169.9 (4315.5) 169.9 (4315.5) 169.9 (4315.5) 169.9 (4315.5) 169.9 (4315.5) Width In., (mm) 34 (864) 34 (864) 34 (864) 34 (864) 34 (864) Height In., (mm) 74 (1880) 74 (1880) 75.5 (1918) 75.5 (1918) 75.5 (1918)

UNIT WEIGHTS (5)

Operating Weight, lb., (kg) 8557 (3881) 8557 (3881) 9314 (4225) 9505 (4311) 9505 (4311) Shipping Weight, lb., (kg) 7840 (3556) 7840 (3556) 8206 (3722) 8345 (3785) 8345 (3785) Operating Charge per Circuit, R-134a, lb., (kg)

127 (58) 127 (58) 128 (58) 124 (56) 124 (56)

Notes: 1. Certified in accordance with ARI Standard 550/590-98. 2. All units have one compressor per circuit. 3. 80% full R-134a at 90°F (32°C) per refrigerant circuit. 4. Dimensions are without the optional sound enclosure. See dimension drawings for enclosure dimensions. 5. The optional sound enclosure adds 650 lbs (295 kg) to the shipping and operating weights.

26 WGS 130A to 190A IMM1157

WGS-AA Remote Condenser Table 11, WGS-130AA - WGS-190AA

WGS UNIT SIZE 130AA 140AA 160AA 170AA 190AA

Unit capacity @ 44F LWT, 125F SDT, tons, (kW) 116.0 (407.9) 125.9 (442.7) 136.1 (478.5) 148.0 (520.4) 160.1 (562.9)

No. Circuits 2 2 2 2 2

COMPRESSORS, FRAME 3

Nominal Horsepower 65 65 65 80 80 80 80 95 95 95 Number (2) 1 1 1 1 1 1 1 1 1 1 % Minimum Capacity (Modulated) 15 13/17 15 14/16 15 Oil Charge per Compressor oz., (l) 256 (7.6) 256 (7.6) 256 (7.6) 256 (7.6) 256 (7.6)

CONDENSER (Remote)

EVAPORATOR

Number 1 1 1 1 1 No. Refrigerant Circuits 2 2 2 2 2 Water Volume, gallons, (l) 68 (257) 68 (257) 115 (435) 115 (435) 115 (435) Refrig. Side D.W.P., psig, (kPa) 354 (2441) 354 (2441) 354 (2441) 354 (2441) 354 (2441) Water Side D.W.P., psig, (kPa) 152 (1048) 152 (1048) 152 (1048) 152 (1048) 152 (1048) Water Connections: Inlet & Outlet, in., (mm) victaulic 6.0 (152) 6.0 (152) 8.0 (203) 8.0 (203) 8.0 (203) Drain & Vent (NPT INT.) 0.5 0.5 0.5 0.5 0.5

UNIT DIMENSIONS (3)

Length In., (mm) 179.3 (4554.2) 179.3 (4554.2) 179.3 (4554.2) 179.3 (4554.2) 179.3 (4554.2) Width In., (mm) 34 (864) 34 (864) 34 (864) 34 (864) 34 (864) Height In., (mm) 60 (1524) 60 (1524) 61.8 (1570) 61.8 (1570) 61.8 (1570)

UNIT WEIGHTS (4)

Operating Weight, lb., (kg) 6265 (2841) 6265 (2841) 7022 (3185) 7022 (3185) 7022 (3185) Shipping Weight, lb., (kg) 5659 (2567) 5659 (2567) 6024 (2732) 6024 (2732) 6024 (2732) Operating Charge per Circuit, lb., (kg) R-134a

35 (15.9) 35 (15.9) 36 (16.5) 36 (16.5) 36 (16.5)

Notes: 1. Certified in accordance with ARI Standard 550/590-98. 2. Dimensions are without the optional sound enclosure. See dimension drawings for enclosure dimensions. 3. The optional sound enclosure adds 650 lbs (295 kg) to the shipping and operating weights.

IMM 1157 WGS 130A to 190A 27

Unit Configuration

The chiller unit has two refrigerant circuits, each with a single semi-hermetic rotary screw compressor, a shared two-circuited shell-and-tube evaporator, a water-cooled condenser, interconnecting refrigerant piping and refrigerant specialties. A single two-section control panel contains the control and starting equipment.

Figure 14, Schematic Piping Diagram (One of Two Circuits)

DX EVAPORATOR

WATER COOLED CONDENSERWATER OUT

FIELD DISCHARGE CONNECTION.

FIELD LIQUID CONNECTION.

PACKAGE UNIT ONLY

DISCHARGE TUBING

SUCTION TUBING

LIQUIDTUBING

LESS CONDENSER UNIT ONLY

330643901 -C010AWGS REFRIGERANT PIPING

LIQUID SHUT-OFF VALVE

LIQUID FILTER DRYER

WATER OUT WATER IN

PRESSURE RELIEF VALVE CHARGING VALVE

WATER IN

ELECTRONIC EXPANSION

VALVE

LIQUID SIGHT GLASS

SCHRADER VALVE (LESS CONDENSER ONLY)

SUCTION SHUT-OFFVALVE (OPTIONAL)

CHARGING VALVE

PRESSURE RELIEF VALVE

SCHRADER VALVE

SCHRADER VALVE

SCHRADER VALVE

PRESSURE RELIEF VALVE

SCREW COMPRESSOR

DISCHARGE SHUT-OFF AND CHECK VALVE

Components

Table 12, Major Components

Compressor Size Frame 3200

Condenser Size Unit Size

System #1 System #2

Evaporator Size

System #1 System #2

130A Small Small EV40271212 C1210-101 C1210-101

140A Small Medium EV40271212 C1210-101 C1210-101

160A Medium Medium EV50271313 C1210-101 C1210-101

170A Medium Large EV50271313 C1210-121 C1210-121

190A Large Large EV50271313 C1210-121 C1210-121

28 WGS 130A to 190A IMM1157

Wiring

Field Wiring, Power The WGS “A” vintage chillers are built standard with:

Multi-point (2) power supply to a terminal block per circuit with no compressor isolation circuit breakers.

Optional power connections include:

Multi-point power connection to a non-fused disconnect switches with through-the-door handle mounted in the control box in lieu of the power block

Multi-point power connection to high interrupt rated disconnect switches with through-the-door handle

Multi-point power connection to high interrupt disconnect switches with through-the-door handle in a high short circuit current rated panel

Single point power connection to a terminal block with individual compressor isolation circuit breakers per circuit

Single point power connection to high interrupt circuit breakers with through-the-door handles and with individual compressor isolation circuit breakers per circuit

Single point power connection to a high interrupt rated disconnect switch in a high short circuit current rated panel and with individual compressor isolation circuit breakers per circuit.

A factory installed control circuit transformer is standard. Optionally, a field-installed control power source can be wired to the unit.

Circuit breakers for backup compressor short circuit protection are standard on all units.

Wiring and conduit selections must comply with the National Electrical Code and/or local requirements.

An open fuse indicates a short, ground, or overload. Before replacing a fuse or restarting a compressor, the trouble must be found and corrected. Tables in the Electrical Data section (page 30) give specific information on recommended wire sizes.

NOTE: Use only copper conductors in main terminal block. Terminations are sized for copper only.

Field Wiring, Control A factory-mounted control transformer is provided to supply the correct control circuit voltage.

The transformer power leads are connected to the power block PB1 or disconnect switch DS1.

Interlock Wiring, Condenser Pump Starter or Air-Cooled Condenser Fan Starter The MicroTech II controller can interlock a condenser pump starter, and tower fans, and control a tower bypass valve on water-cooled units. Up to six air-cooled condenser fan contactors per circuit can be controlled by the MicroTech II unit controller on remote condenser applications. Pressure switches supplied with the condenser can also control condenser fan operation. Coil voltage must be 115 volts with a maximum of 20 VA.

An evaporator and condenser (water-cooled units only) flow switch is necessary on all units. It is also advisable to wire a chilled water pump interlock in series with the flow switch for additional evaporator freeze protection.

IMM 1157 WGS 130A to 190A 29

Ambient Air Sensor Units with a remote air-cooled condenser will have an outdoor air sensor furnished with the unit inside the control panel and wired to the correct terminals. It must be installed outdoors in a location that will give the true outdoor temperature that the condenser coils will see. Splicing of the sensor lead may be required. The sensor must be installed for the unit to operate.

BAS Interface Connection to the chiller for all building automation systems (BAS) protocols is at the unit controller. An optional interface module, depending on the protocol being used, may have been factory-installed in the unit controller (or it can be field installed).

Protocols Supported Table 13, Standard Protocol Data

Protocol Physical Layer Data Rate Controller Other

BACnet/IP or BACnet/Ethernet

Ethernet 10 Base-T 10 Megabits/sec MicroTech II Reference ED 15062

BACnet MSTP RS-485 9600, 19200 or 38400 bits/sec MicroTech II Reference ED 15062

LONWORKS FTT-10A 78kbits/sec MicroTech II Reference ED 15062

Modbus RTU RS-485 or RS-232 9600 or 19200

bits/sec MicroTech II Reference ED 15063

The interface kits on the MicroTech II controller are as follows:

BACnet Kit P/N 350147404: BACnet/IP, BACnet MS/TP, or BACnet Ethernet LONWORKS

Units equipped with a pCo2 (with DIP switches) for CP1 require Kit P/N350147401.

Units equipped with a pCo3 (no DIP switches) for CP1 require Kit P/N 350147409. Modbus: Modbus RTU

Optional Open Choices™ BAS interfaces. The locations and interconnection requirements for the various standard protocols are found in their respective installation manuals.

Modbus IM 743-2 LONWORKS IM 735-2 BACnet IM 736-2

Referenced documents may be obtained from the local Daikin sales office, from the local Daikin Service office, or from the Daikin Technical Response Center, located in Staunton, Virginia (540-248-0711).

These documents can also be found on www.DaikinApplied.com under Product Information > (chiller type) > Control Integration.

The following are trademarks or registered trademarks of their respective companies: BACnet from the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., LonTalk, LONMARK and LONWORKS from Echelon Corporation, and Modbus and Modbus RTU from Schneider Electric.

Remote Operator Interface Panel The box containing the optional remote interface panel will have installation instructions, IOM MT II Remote, shipped with it. The manual is also available for downloading from www.DaikinApplied.com .

http://www.daikinmcquay.com/�

30 WGS 130A to 190A IMM1157

Electrical Data

Table 14, Electrical Data, Water-cooled, Single-Point Connection

POWER SUPPLY FIELD WIRE

FIELD FUSE SIZE or BREAKER SIZE WGS

UNIT SIZE

VOLTS

MINIMUM CIRCUIT

AMPACITY (MCA) QTY

MIN. WIRE GAUGE

RECOM- MENDED

MAXIMUM

208 n/a n/a n/a n/a n/a 230 n/a n/a n/a n/a n/a 380 243 3 250 300 350 460 201 3 4/0 225 250

130AW

575 162 3 2/0 200 225 208 n/a n/a n/a n/a n/a 230 n/a n/a n/a n/a n/a 380 253 3 250 300 350 460 209 3 4/0 250 300

140AW


160AW


170AW

575 182 3 3/0 225 250 208 n/a n/a n/a n/a n/a 230 n/a n/a n/a n/a n/a 380 288 3 350 350 400 460 237 3 250 300 300

190AW

575 189 3 3/0 225 250 Notes 1. Table based on 75°C field wire. 2. Complete notes are on page 40.

IMM 1157 WGS 130A to 190A 31

Table 15, Electrical Data, Water-cooled, Multiple-Point Connection

ELECTRICAL CIRCUIT 1 (COMP 1) ELECTRICAL CIRCUIT 2 (COMP 2)

FIELD FUSING FIELD FUSING POWER SUPPLY FIELD WIRE

POWER SUPPLYFIELD WIRE

WGS UNIT SIZE

VOLTS MINIMUM CIRCUIT

AMPS (MCA) QTY

MIN. WIRE GAUGE

REC FUSESIZE

MAX FUSE SIZE

MINIMUMCIRCUIT

AMPS (MCA) QTY

MIN.WIREGAUGE

REC FUSE SIZE

MAX FUSE SIZE

208 247 3 250 300 400 247 3 250 300 400

230 223 3 4/0 300 400 223 3 4/0 300 400

380 135 3 1/0 175 225 135 3 1/0 175 225

460 112 3 2 150 200 112 3 2 150 200

130AW

575 90 3 3 110 150 90 3 3 110 150

208 247 3 250 300 400 267 3 300 350 450

230 223 3 4/0 300 400 240 3 250 300 400

380 135 3 1/0 175 225 145 3 1/0 175 250

460 112 3 2 150 200 120 3 1 150 200

140AW

575 90 3 3 110 150 97 3 3 125 150

208 267 3 300 350 450 267 3 300 350 450

230 240 3 250 300 400 240 3 250 300 400

380 145 3 1/0 175 250 145 3 1/0 175 250

460 120 3 1 150 200 120 3 1 150 200

160AW

575 97 3 3 125 150 97 3 3 125 150

208 267 3 300 350 450 292 3 350 350 500

230 240 3 250 300 400 263 3 300 350 450

380 145 3 1/0 175 250 160 3 2/0 200 250

460 120 3 1 150 200 132 3 1/0 175 225

170AW

575 97 3 3 125 150 105 3 2 150 175

208 292 3 350 350 500 292 3 350 350 500

230 263 3 300 350 450 263 3 300 350 450

380 160 3 2/0 200 250 160 3 2/0 200 250

460 132 3 1/0 175 225 132 3 1/0 175 225

190AW

575 105 3 2 150 175 105 3 2 150 175

NOTES: 1. Table based on 75°C field wire. 2. Complete notes are on page 40. 3. 3/0 wire is required for the disconnect switch option, 2/0 may be used for power block connection.

32 WGS 130A to 190A IMM1157

Table 16, Electrical Data, Remote Condenser, Single-Point Connection POWER SUPPLY

FIELD WIRE FIELD FUSE SIZE or

BREAKER SIZE WGS UNIT SIZE

VOLTS

MINIMUM CIRCUIT

AMPACITY (MCA) QTY

MIN. WIRE GAUGE

RECOM- MENDED

MAXIMUM

208 n/a n/a n/a n/a n/a 230 n/a n/a n/a n/a n/a 380 n/a n/a n/a n/a n/a 460 252 3 250 MCM 300 350

130AA

575 192 3 3/0 AWG 225 250 208 n/a n/a n/a n/a n/a 230 n/a n/a n/a n/a n/a 380 n/a n/a n/a n/a n/a 460 265 3 300 MCM 300 350

140AA


160AA


170AA

575 236 3 250 MCM 300 300 208 n/a n/a n/a n/a n/a 230 n/a n/a n/a n/a n/a 380 n/a n/a n/a n/a n/a 460 318 3 (2) 250 MCM 400 450

190AA

575 255 3 250 MCM 300 350 Notes 1. Table based on 75°C field wire. 2. Complete notes are on page 40.

IMM 1157 WGS 130A to 190A 33

Table 17, Electrical Data, Remote Condenser, Multiple-Point Connection

ELECTRICAL CIRCUIT 1 (COMP 1) ELECTRICAL CIRCUIT 2 (COMP 2)

POWER SUPPLY FIELD FUSING POWER SUPPLY FIELD FUSING

FIELD WIRE FIELD WIRE

WGS UNIT SIZE

VOLTS MINIMUM CIRCUIT

AMPS (MCA) QTY

MIN.WIREGAUGE

REC. FUSE SIZE

MAX FUSESIZE

MINIMUMCIRCUIT

AMPS (MCA) QTY

MIN. WIREGAUGE

REC. FUSE SIZE

MAX FUSE SIZE

208 290 3 350 350 500 290 3 350 350 500

230 263 3 300 350 450 263 3 300 350 450

380 160 3 2/0 200 250 160 3 2/0 200 250

460 140 3 1/0 175 250 140 3 1/0 175 250

130AA

575 107 3 2 150 175 107 3 2 150 175

208 290 3 350 350 500 334 3 400 450 600

230 263 3 300 350 450 300 3 350 400 500

380 160 3 2/0 200 250 182 3 3/0 225 300

460 140 3 1/0 175 250 153 3 2/0 200 250

140AA

575 107 3 2 150 175 118 3 1 150 200

208 334 3 2-250 450 600 334 3 2-250 450 600

230 300 3 350 400 500 300 3 350 400 500

380 182 3 3/0 225 300 182 3 3/0 225 300

460 153 3 2/0 200 250 153 3 2/0 200 250

160AA

575 118 3 1 150 200 118 3 1 150 200

208 334 3 2-250 450 600 390 6 2-250 500 700

230 300 3 350 400 500 353 3 2-250 450 600

380 182 3 3/0 225 300 223 3 4/0 300 400

460 153 3 2/0 200 250 177 3 3/0 225 300

170AA

575 118 3 1 150 200 142 3 1/0 175 250

208 390 6 2-250 500 700 390 6 2-250 500 700

230 353 3 2-250 450 600 353 3 2-250 450 600

380 223 3 4/0 300 400 223 3 4/0 300 400

460 177 3 3/0 225 300 177 3 3/0 225 300

190AA

575 142 3 1/0 175 250 142 3 1/0 175 250

NOTES: 1. Table based on 75°C field wire. 2. Complete notes are on page 40. 3. 3/0 wire is required for the disconnect switch option, 2/0 may be used for power block connection.

34 WGS 130A to 190A IMM1157

Table 18, Water-cooled, Compressor Amp Draw

RATED LOAD AMPS WGS UNIT SIZE

VOLTS CIRCUIT #1 CIRCUIT #2

208 197 197 230 178 178 380 108 108 460 89 89

130AW

575 72 72 208 197 213 230 178 192 380 108 116 460 89 96

140AW

575 72 77 208 213 213 230 192 192 380 116 116 460 96 96

160AW

575 77 77 208 213 233 230 192 210 380 116 128 460 96 105

170AW

575 77 84 208 233 233 230 210 210 380 128 128 460 105 105

190AW

575 84 84

Table 19, Remote Condenser, Compressor Amp Draw

RATED LOAD AMPS WGS UNIT SIZE

VOLTSCIRCUIT #1 CIRCUIT #2

208 232 232 230 210 210 380 128 128 460 112 112

130AA

575 85 85 208 232 267 230 210 240 380 128 145 460 112 122

140AA

575 85 94 208 267 267 230 240 240 380 145 145 460 122 122

160AA

575 94 94 208 267 312 230 240 282 380 145 178 460 122 141

170AA

575 94 113 208 312 312 230 282 282 380 178 178 460 141 141

190AA

575 113 113

IMM 1157 WGS 130A to 190A 35

Table 20, Water-cooled, Field Wiring Information with Single-Point Power

WIRING TO STANDARD UNIT POWER BLOCK WIRING TO OPTIONAL NONFUSED

DISCONNECT SWITCH IN UNIT WGS UNIT SIZE

VOLTS TERMINAL SIZE

AMPS

CONNECTOR LUG RANGE PER PHASE

(COPPER WIRE ONLY)

SIZE AMPS


(COPPER WIRE ONLY) 208 n/a n/a n/a n/a 230 n/a n/a n/a n/a 380 400 #6-350 400 3/0-500 460 400 #6-350 250 #6-350

130AW

575 400 #6-350 250 #6-350 208 n/a n/a n/a n/a 230 n/a n/a n/a n/a 380 400 #6-350 400 3/0-500 460 400 #6-350 250 #6-350

140AW


160AW


170AW


190AW

575 400 #6-350 250 #6-350

Table 21, Remote Condenser, Field Wiring Information with Single-Point Power

WIRING TO STANDARD UNIT POWER BLOCK WIRING TO OPTIONAL NONFUSED

DISCONNECT SWITCH IN UNIT WGS UNIT SIZE

VOLTS TERMINAL SIZE

AMPS


(COPPER WIRE ONLY)

SIZE AMPS


(COPPER WIRE ONLY) 208 n/a n/a n/a n/a

230 n/a n/a n/a n/a 380 n/a n/a n/a n/a

460 400 #6-350 400 3/0-500

130AA

575 400 #6-350 250 #6-350

208 n/a n/a n/a n/a


460 400 #6-350 400 3/0-500

140AA

575 400 #6-350 250 #6-350

208 n/a n/a n/a n/a


460 400 #6-350 400 3/0-500

160AA

575 400 #6-350 250 #6-350

208 n/a n/a n/a n/a


460 400 #6-350 400 3/0-500

170AA

575 400 #6-350 250 #6-350

208 n/a n/a n/a n/a


460 400 #6-350 400 3/0-500

190AA

575 400 #6-350 400 3/0-500

36 WGS 130A to 190A IMM1157

Table 22, Water-cooled, Field Wiring to Multiple-Point Power Block WIRING TO UNIT POWER BLOCK

TERMINAL SIZE (AMPS) CONNECTOR WIRE RANGE PER

PHASE (COPPER WIRE ONLY)

WGS UNIT SIZE

VOLTS

CKT 1 CKT 2 CKT 1 CKT 2

208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

460 400 400 #6-350 #6-350

130AW

575 400 400 #6-350 #6-350

208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

460 400 400 #6-350 #6-350

140AW

575 400 400 #6-350 #6-350

208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

460 400 400 #6-350 #6-350

160AW

575 400 400 #6-350 #6-350

208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

460 400 400 #6-350 #6-350

170AW

575 400 400 #6-350 #6-350

208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

190AW

460 400 400 #6-350 #6-350 575 400 400 #6-350 #6-350

Table 23, Remote Condenser, Field Wiring to Multiple-Point Power Block WIRING TO UNIT POWER BLOCK

TERMINAL SIZE (AMPS) CONNECTOR WIRE RANGE PER

PHASE (COPPER WIRE ONLY)

WGS UNIT SIZE

VOLTS


208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

460 400 400 #6-350 #6-350

130AA

575 400 400 #6-350 #6-350

208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

460 400 400 #6-350 #6-350

140AA

575 400 400 #6-350 #6-350

208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

460 400 400 #6-350 #6-350

160AA

575 400 400 #6-350 #6-350

208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

460 400 400 #6-350 #6-350

170AA

575 400 400 #6-350 #6-350

208 400 400 #6-350 #6-350

230 400 400 #6-350 #6-350 380 400 400 #6-350 #6-350

460 400 400 #6-350 #6-350

190AA

575 400 400 #6-350 #6-350

IMM 1157 WGS 130A to 190A 37

Table 24, Water-cooled , Field Wiring to Multiple-Point Disconnect Switc WIRING TO UNIT DISCONNECT SWITCH

TERMINAL SIZE (AMPS)

CONNECTOR WIRE RANGE PER PHASE (COPPER WIRE ONLY)

WGS UNIT SIZE

VOLTS


208 250 250 #6-350 #6-350 230 250 250 #6-350 #6-350 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

130AW

575 250 250 #6-350 #6-350 208 250 400 #6-350 3/0-500 230 250 250 #6-350 #6-350 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

140AW

575 250 250 #6-350 #6-350 208 400 400 3/0-500 3/0-500 230 250 250 #6-350 #6-350 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

160AW

575 250 250 #6-350 #6-350 208 400 400 3/0-500 3/0-500 230 250 400 #6-350 3/0-500 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

170AW

575 250 250 #6-350 #6-350 208 400 400 3/0-500 3/0-500 230 400 400 3/0-500 3/0-500 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

190AW

575 250 250 #6-350 #6-350

Table 25, Remote Condenser, Field Wiring to Multiple-Point Disconnect Switch WIRING TO UNIT DISCONNECT SWITCH

TERMINAL SIZE (AMPS)

CONNECTOR WIRE RANGE PER PHASE (COPPER WIRE ONLY)

WGS UNIT SIZE

VOLTS


208 400 400 3/0-500 3/0-500 230 400 400 3/0-500 3/0-500 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

130AA

575 250 250 #6-350 #6-350 208 400 400 3/0-500 3/0-500 230 400 400 3/0-500 3/0-500 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

140AA

575 250 250 #6-350 #6-350 208 400 400 3/0-500 3/0-500 230 400 400 3/0-500 3/0-500 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

160AA

575 250 250 #6-350 #6-350 208 400 400 3/0-500 3/0-500 230 400 400 3/0-500 3/0-500 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

170AA

575 250 250 #6-350 #6-350 208 400 400 3/0-500 3/0-500 230 400 400 3/0-500 3/0-500 380 250 250 #6-350 #6-350 460 250 250 #6-350 #6-350

190AA

575 250 250 #6-350 #6-350

38 WGS 130A to 190A IMM1157

Wiring Diagrams

Figure 15, WGS 130AW – 190AW Field Wiring Diagram

DWG. 330588201 REV. 0B

TO COMPRESSOR(S)

DISCONNECT(BY OTHERS)

3 PHASE

POWER

SUPPLY

GND LUG

UNIT MAINTERMINAL BLOCK

FUSED CONTROLCIRCUIT TRANSFORMER

120 VAC

NOTE: ALL FIELD WIRING TO BEINSTALLED AS NEC CLASS 1WIRING SYSTEM WITH CONDUCTORRATED 600 VOLTS

TB1(115 VAC)

TB1-2

1

82

2EVAP. PUMP RELAY #1

(BY OTHERS)120 VAC 1.0 AMP MAX

N

120 VAC

81

75

24 VAC

ALARM BELL RELAY

FACTORY SUPPLIED ALARMFIELD WIRED

ALARM BELLOPTION

TB1(24 VAC OR 30 VDC)

72

IF REMOTE STOP CONTROLIS USED, REMOVE LEAD 897FROM TERM. 40 TO 53.

89760

66

AUTO

ON

OFF

MANUAL

60

68

AUTO

ON

OFF

MANUAL

REMOTE STOPSWITCH

(BY OTHERS)

ICE MODESWITCH

(BY OTHERS)

TIMECLOCK

71

4-20MA FOREVAP. WATER RESET

(BY OTHERS)

4-20MA FORDEMAND LIMIT(BY OTHERS)

-

-

GND

FU4 FU5

FU7

CHWR

ABR

85



N

120 VACCHWR

86

2COND. PUMP RELAY #1


N

120 VAC

CWR

87

2N

120 VAC

CWR

88

2TOWER FAN #1(BY OTHERS)

120 VAC 1.0 AMP MAX

N120 VAC

M11

89

2N

120 VACM12

78

77N

80

79

0-10VDC

COND. PUMP RELAY #2(BY OTHERS)

120 VAC 1.0 AMP MAX

TOWER FAN #2(BY OTHERS)

120 VAC 1.0 AMP MAX

(BY OTHERS)

60

76

NOR. OPEN PUMP AUX.CONTACTS (OPTIONAL)

COND. FLOWSWITCH

(BY OTHERS)

60

67


EVAP. FLOWSWITCH

(BY OTHERS)

70

70

COOLING TOWER BYPASS(BY OTHERS)

N

0-10VDC

+

+

2

ALARM BELLRELAY

ALARM BELL OPTION

BELL

1 2

COM NO

*MANDATORY IF FACTORY FLOW SWITCH OPTION IS NOT SELECTED

*MANDATORY IF FACTORY FLOW SWITCH OPTION IS NOT SELECTED

IMM 1157 WGS 130A to 190A 39

Figure 16, WGS 130AA – 190AA Field Wiring Diagram (Remote Condenser)

DWG. 330588101 REV. 0C

TO COMPRESSOR(S)

DISCONNECT(BY OTHERS)

3 PHASE

POWER

SUPPLY

GND LUG

UNIT MAINTERMINAL BLOCK

FUSED CONTROLCIRCUIT TRANSFORMER

120 VACNOTE: ALL FIELD WIRING TO BEINSTALLED AS NEC CLASS 1WIRING SYSTEM WITH CONDUCTORRATED 600 VOLTS

TB1(115 VAC)

TB1-2

1

82



N

120 VAC

81

75

24 VAC

TB1(24 VAC)

72

IF REMOTE STOP CONTROLIS USED, REMOVE LEAD 897FROM TERM. 40 TO 53.

89760

66

AUTO

ON

OFF

MANUAL

60

68

AUTO

ON

OFF

MANUAL

REMOTE STOPSWITCH

(BY OTHERS)

ICE MODESWITCH

(BY OTHERS)

TIMECLOCK

71

4-20MA FOREVAP. WATER RESET

(BY OTHERS)

4-20MA FORDEMAND LIMIT(BY OTHERS)

-

-

GND

FU4 FU5

FU7

CHWR

85



N

120 VACCHWR

60

67


EVAP. FLOWSWITCH

(BY OTHERS)

70

70

+

+

ALARM BELL RELAY

FACTORY SUPPLIED ALARMFIELD WIRED

ALARM BELLOPTION ABR

NO1

2N

120 VAC

NO2

2N

120 VAC

NO3

2N

120 VAC

NO4

2N

120 VAC

M14

NO5

2N

NO6

2N

M11

M12

M13

120 VAC

120 VAC

M15

M16

(LOCATED ONCIRCUIT

CONTROLLER)

J13

C

C

CIRCUIT #1

J12

(LOCATED ONCIRCUIT

CONTROLLER)

CONDENSER FANCONTACTOR COIL #1






TB692

98144

145

146

14598

93

148

14598

94

150

14598

95

152

14598

96

154

14598

97

NO1

2N

120 VAC

NO2

2N

120 VAC

NO3

2N

120 VAC

NO4

2N

120 VAC

M24

NO5

2N

NO6

2N

M21

M22

M23

120 VAC

120 VAC

M25

M26

(LOCATED ONCIRCUIT

CONTROLLER)

J13

C

C

CIRCUIT #2

J12

(LOCATED ONCIRCUIT

CONTROLLER)







TB792

98244

245

246

24598

93

248

24598

94

250

24598

95

252

24598

96

254

24598

97

2

ALARM BELLRELAY

ALARM BELL OPTION

BELL

1 2

COM NO

*MANDATORY IF FACTORY FLOW SWITCH OPTION IS NOT SELECTED.

See notes on page 40.

40 WGS 130A to 190A IMM1157

Notes for “Electrical Data Single/Multiple Point” Power: 1. Wire sizing amps is 10 amps if a separate 115V power supply is used.

2. Unit wire size ampacity is equal to 125% of the largest compressor motor, plus 100% ofthe RLA of all other loads in the circuit, including the control transformer.

3. Recommended power lead wire sizes for 3 conductors per conduit are based on 100%conductor ampacity in accordance with NEC. Voltage drop has not been included.Therefore, power leads should be kept short. All terminal block connections must bemade with copper (type THW) wire.

4. The recommended power lead wire sizes are based on an ambient temperature of 86°F(30°C). Ampacity correction factors must be applied for other ambient temperatures.Refer to the National Electrical Code Handbook.

5. The recommended fuse size or HACR circuit breaker size is equal to 150% of thelargest compressor motor RLA plus 100% of the remaining compressor RLA.

6. The maximum fuse size or HACR circuit breaker size is equal to 225% of the largestcompressor motor RLA plus 100% of the remaining compressor RLA.

7. Must be electrically grounded according to national and local electrical codes.

Power Limitations: 1. Voltage within 10 percent of nameplate rating.

2. Voltage unbalance not to exceed 2% with a resultant current unbalance of 6 to 10 timesthe voltage unbalance per NEMA MG-1, 1998 Standard. This is an importantrequirement and must be adhered to.

Notes for “Electrical Data” 1. Requires a disconnect switch per circuit to supply electrical power to the unit. If field

supplied, this power supply must either be fused or use an HACR type circuit breaker.

2. Use copper wiring to unit power block or optional non-fused disconnect switch.

3. All field wire size values given in table apply to 75°C rated wire per NEC.

Notes for Wiring Diagram Remote Condenser Units On remote condenser units, head pressure control by cycling fans can be accomplished several ways. The MicroTech II controller in the unit can be used. It senses discharge pressure and will stage up to 6 condenser fans when wired in accordance with Figure 16 on page 39. If the condenser has more than 6 fans, 2 can be operated on a step. For example, a condenser with 10 fans would have 2 fans on steps #1 through #4 and one fan each on steps #5 and #6. Condensers with less than 6 fans would use the appropriate MicroTech II steps beginning with #1.

Wire so that the first-on, last-off fan stage has one fan on it.

The Daikin ACD condensers have unit-mounted and wired single fan motor VFD combined with fan cycling by pressure switches for the balance of the fans available as an option. They can be used for staging fans instead of the WGS MicroTech II controller.

See Ambient Air Sensor note on page 29.

Circuit Breakers The circuit breaker used in the High Short Circuit panel option may have a higher trip rating than the unit Maximum Overload Protection (MOP) value shown on the unit nameplate. The circuit breaker is installed as a service disconnect switch and does not function as branch circuit protection, mainly that the protection device must be installed at the point of origin of the power wiring. The breaker (disconnect switch) is oversized to avoid nuisance trips at high ambient temperature conditions.

IMM 1157 WGS 130A to 190A 41

Figure 17, Schematic Diagram Legend

Designation Description Standard

Location Designation Description

Standard

Location

ABR Alarm Bell Relay Field Mounted M12 Tower Fan 1 Field Mounted

BB Bias Block Outer Panel PB1 / 2 Power Block Inner Panel

CB1 / 2 Circuit Breaker Inner Panel REC 115V Outlet (Optional) Outer Panel

CB11 / 211 Circuit Controller

Output Breaker Output Panel RS1 Remote Stop Switch Field Mounted

CB12 / 22 Circuit Controller

Compr. Heater Output Panel S1 System Shut-Off Switch Outer Panel

CHW1 Chilled Water Flow

Switch Field Mounted S01 Suction Pressure Compressor

CHWR Chilled Water Relay Field Mounted S02 Discharge Pressure Compressor

CWR Cond. Water Relay Field Mounted S03 Liquid Pressure Liquid Line

CWI Cond. Water Flow

Switch Field Mounted S04 Suction Temperature Compressor

Cir. Contr. 1 /

2 Circuit Controller Outer Panel S05 Discharge Temperature Compressor

Compr 1 / 2 Compressors Behind Control

Box S06 Liquid Temperature Liquid Line

DS ½ Disconnect Switch Inner Panel S07 Outside Ambient

Temperature

Behind Control

Box

FU4 T1 Primary Fuse Inner Panel S08 Leaving Water Sensor Leaving Water

Nozzle

FU5 T1 Primary Fuse Inner Panel S09 Entering Water

Temperature

Entering Water

Nozzle

FU6 T1 Secondary Fuse Inner Panel S10 Demand Limit Reset Field Mounted

FU7 T1 Secondary Fuse Inner Panel S11 Leaving Water Reset Field Mounted

F3 115v Outlet Fuse

(Optional)

Cir. #2 Outer

Panel CS Circuit System Switch Outer Panel

GRD Ground Inner Panel Load/Unload Load/Unload Solenoid Compressor

Htr-Compr Compressor Heater Compressor T1 Control Transformer Inner Panel

MHP High Pressure Switch Compressor T2 Unit Contr. 24V

Transformer Outer Panel

MHPR Mechanical High

Pressure Relay Outer Panel T13 / T23

Circuit Contr. 24V


MS1 Mode Switch Field Mounted T14 / T24 Comp. Load/Unload 24V


SSS ½ Comp. Solid State

Starter Inner Panel T15 / T25

EXV Driver 24V


MJ Mechanical Jumper Control Box TB1 – TB2 Terminal Blocks Outer Panel

M11 Tower Fan 2 Field Mounted WJ Wire Jumper Control Box

42 WGS 130A to 190A IMM1157

Figure 18, WGS 130 - 190, Circuit Controller Schematic Wiring Diagram

IDC1

1

1

3

3

(SEE LINE 693)TO T15

J1

J2

122

121

MJ

J3

EVAP PRESS TRANSDUCER (S01)

CONDENSER PRESS TRANSDUCER (S02)

SHIELD

40

40

CIRCUIT SWITCH

J5

ID1

ID2

ID3

ID4

ID5

ID6

ID7

ID8

128CS

127

DIG

ITA

L O

UT

PU

TS

A+

GND

B-J11

J12

C1

NO1

NO2

NO3

C1

J13

C4

NO4

NO5

NO6

C4

WJ

123

J14

C7

C7

NO8

C8

NC8

J15

NO7

GOG

B4BC4

B5BC5

COMPRESSORSSS CONTACT

J4

J6

B6

B7

B8

GND

J3

J5

J4

J2

J1RED

WHTBLK

REDWHTBLK

0-5 VDC

0-5 VDC

MJ

20120

T13120V

24V

114 113

137

138

BLKRED

25

26DC GROUND

21 VDC1

2

SLIDE LOADINDICATOR

SUCTION TEMP. (S04)

DISCHARGE TEMP. (S05)BLKRED

VG

VGD

Y3

Y4

Y1

Y2

124

125

126EXV DRIVER(SEE DETAIL 1)

ID9

ID10

ID11

ID12

IDC9

J7

129

131

21WHT

DPS

C 1

BLKDIFFERENTIAL PRESSURE SWITCH

GRNPE

130MECHANICAL HIGH PRESSURE FAULT

132

133

134

244-20MA3

SLIDE LOAD

INDICATOR

135

136

3

1

OLS220

GREENPE

J16

C9

NO9

NO10

NO11

C9

J17

NO12

NC12

NO13

C13

NC13

J18

C12

PE

120

OHMS

MJ

116

1

5

2

6

ID13H

ID13

IDC13

ID14

ID14H

J8

(LOWER LEVEL)

CONTROLLER

40

882

883

BIAS 5

BIAS 6

BLKCONDENSER LEAVING WATER TEMP. (S12)

RED

NOTES: 1) * - REPRESENTS CIRCUIT

2) ONE HUNDRED SERIES FOR CIRCUIT #13) TWO HUNDRED SERIES FOR CIRCUIT #2

MJ

22

139 (SEE LINE 687)

OIL SEP. HEATER

0-10VDC

MHPR

2 4

GND

A+

B-

D3 SA-

SB+

SCOM

SHLD

165

TB1-7

164STARTER FAULT

TB1-6

FLT

BLACK

WHITE

GREEN

DETAIL 2 - THERMISTOR CARD

1 2

MOTORGUARDISTOR

J3-1

170 171J3-2

LP*

REMOTE EVAP. ONLY.

IN SERIES WITH 170

188

IMM 1157 WGS 130A to 190A 43

Schematic Wiring Diagram (Continued)

-601

-602

-603

-604

-605

-606

-607

-608

-609

-610

-611

-612

-613

-614

-615

-616

-617

-618

-619

-620

-621

-622

-623

-624

-625

-626

-627

-628

-629

-630

-631

-632

-633

-634

-635

-636

-637

-638

-639

-640

-641

-642

-643

-644

-645

-646

-647

-648

-649

-650-651

-652

-653

-654

-655

-656

-657

-658

-659

-660

-661

-662

-663

-664

-665

-666

-667

-668

-669

-670

-671

-672

-673

-674

-675

-676

-677

-678

-679

-680

-681

-682

-683

-684

-685

-686

-687

-688

-689

-690

-691

-692

-693

-694

-695

-696

-697

-698

-699

-700

TB1

1

1

2

2

3

4

20

20

21

22

24

25

TERMINAL BLOCKAND LEAD NUMBERS

LINENO.

BLACK

WHITE

GROUND

(p LAN) TO OTHER CIRCUIT CONTROLLERS AND UNIT CONTROLLER

(RESISTOR USED ONLY AT END OF DAISY CHAIN)

1

184

3

105T1

115V

103 NB2

180

CB11

18141

MHPR

0 1

1831 2

MHP

SSS RUN

187

162

1601

5

2

6

T14

120V

24V

161

163

(SEE LINE 690)

1

21

2

GRNPE

LOAD SOLENOID

1

21

GRNPE

2 50

UNLOAD SOLENOID

SV

SV

SCHEM. 330588401 REV. 0B

191

185

PUMPDOWN

DETAIL 1EXV

DRIVER

ANALOG OUTPUT J4-Y3 126

TB1-40 139

+

-PID

GREEN

WHITE

RED

BLACK

+

-

195

196117TO: TB1-2

116TO: TB1-1T15120V

1 5

2 6

24V AC

24V AC

EXV

MOTOR

1

HEATER

2

HTR-OIL SEP.

PUMPDOWN

(TERMINATE AT EACH CONTROLLER)

182

K1

102 101

26

40

40

50

105, 114, 116, 160

180

101, 113, 117,183

177

161, 187

181, MHP-1

182, 184, MHP-2

122, 124

127, BLK, 130, 2-OIL

WHT, 129

3-OIL, 135

1-SLIDE, 137

2-SLIDE, 138

123, 125

40 132, 134, RED

RED, 1-OIL, 136, 139

3-SLIDE, 133

163, 2-LOAD, 2-UNLOAD, 190

27

28

186

192

27

28

172, 1-LOAD

173, 1-UNLOADMJ

185

172

173

PE

PE

PE

PE

GRN - OIL

GRN - DPS

GRN - LOAD

GRN - UNLOAD

197

117(SEE LINE 694)

175

CB12

176

150

152

154

M*1

M*2

M*3

144

146

148

M*4

M*5

M*6REMOTE COND.

2

9892

93

94

95

96

97

92

93

95

94

91

96 152

150

148

146

144

171

30177

FU7

2 1

30 176, 177

90 170

97 154

INT

SV50

19018949

49 188, 189

44 WGS 130A to 190A IMM1157

Figure 19, WGS 130 - 190, Unit Controller Schematic Wiring Diagram

J15

J14

J11

J1

J2

812

801

MJ

J3

BLKRED

804

OUTSIDE AIR TEMP or COND. ENTERING WATER TEMP. (S07)

EVAP. LEAVING WATER TEMP (S08)

EVAP. ENTERING WATER TEMP (S09)

BLK

RED

BLK

RED

75

4-20MADEMAND LIMIT (S10)

UNIT SWITCH

J4

J5

ID1

ID2

ID3

ID4

ID5

ID6

ID7

ID8

808

809

810

811

807

897

RS1

REMOTE SWITCH

EVAP. FLOW SWITCHCHWI

MODE SWITCH

DIG

ITA

L O

UT

PU

TS

CONTROLLER

A+

GND

B-

813

J12

C1

NO1

NO2

NO3

C1

J13

C4

NO4

NO5

NO6

C4

802

C7

C7

NO8

C8

NC8

NO7

GO

G

B1

B2

B3

GND

+VDC

B4

BC4

B5

BC5

EVAP. WATER TEMP. RESET (S11)

PE

4-20MA

SHIELDPE

SHIELDPE

815CWI

COND. FLOW SWITCH

NOTE: J2-B1 OUTSIDE AIR TEMP. IS FOR TGS UNITS ONLY AND CONDENSER ENTERING WATER TEMP. IS FOR WGS UNITS ONLY.

Y4

Y3

Y2

Y1

VG0

VG

S1

884

885

COOLING TOWER BYPASS

COOLING TOWER VFD

887

889

(0-10VDC)

(0-10VDC)

886

888

MJ71

72

70

70

73

77

79

78

80

805806

814

60

60

67

66

68

76

MS1

60

60

67

76

BLU

BLU

WHT

WHT

BRN

BRN

75

75

IDC1800

FACTORY

INSTALLED

FLOW

SWITCHES

IMM 1157 WGS 130A to 190A 45

WGS 130 - 190, Unit Controller Schematic Wiring Diagram (Continued)

-301

-302

-303

-304

-305

-306

-307

-308

-309

-310

-311

-312

-313

-314

-315

-316

-317

-318

-319

-320

-321

-322

-323

-324

-325

-326

-327

-328

-329

-330

-331

-332

-333

-334

-335

-336

-337

-338

-339

-340

-341

-342

-343

-344

-345

-346

-347

-348

-349

-350

-351

-352

-353

-354

-355

-356

-357

-358

-359

-360

-361

-362

-363

-364

-365

BLACK

WHITE

GROUND

(p LAN) TO CIRCUIT CONTROL BOXES

(TERMINATE AT EACH CONTROLLER)

LOAD 2LOAD 1

LINE 21

5

2

624V

T2

120V821LINE 1820

1

822

829

823

824

SEE LINE 301

120V

120V

WJ

LINENO.

CONTACTLOCATION

TERMINAL BLOCKAND LEAD NUMBERS

85

82

81

1

UNIT ALARM

EVAPORATOR PUMP 1

EVAPORATOR PUMP 2

COND. PUMP 1

83060

2

SEE LINE 307

SEE

LINE 306

G

-

+

5

BIAS

BLOCK

880

881

882

883

TO UNIT CONTROLLER B-

TO UNIT CONTROLLER A+

TO CIRCUIT CONTROLLER J4

TO CIRCUIT CONTROLLER J4

86825

120VCWR

COND. PUMP 2 87826

120VCWR

TOWER FAN 1 88827

120VM11

TOWER FAN 2 89828

120VM12

CHWR

CHWR

ABR

SCHEM. 330588301 REV. 0B

TB1

NOTE:

TB1-75 THRU

TB1-89 ARE

FIELD

WIRING

TERMINALS.

820, 822, 8901

2

60

60

60

75

75

75

821, 891

801, 807, 884

800, 885

802, 886

813, 888

897, 830

812

2

2

2

75

897, 809

810

811

806

804

805

814

815

886

887

888

889

829

823

824

825

826

827

828

66

67

68

70

71

72

73

76

77

78

79

80

81

82

85

86

87

88

89

60

60

75

70

2

G

WB

115V OUTLET

890FU12

1 2

891PE

REC

MJ

MJ

83

84

46 WGS 130A to 190A IMM1157

Control Panel Layout

Figure 20, Outer (Microprocessor) Panel

NOTES: 1. Transformers T2 through T25 are class 100, 120V to 12V. 2. Switches for MHPR 11 and 12 (Mechanical High Pressure Switches) are located on the compressors. 3. Mechanical High Pressure Switches Open at 310 psi, Close at 250 psi

T2, Unit Controller

T13, Circ#1 Controller

T14, Circ#1 Load Solenoid

T15, Circ#1 EXV Power

T25, Circ#2 EXV Power

T24, Circ#2 Load Solenoid

T23, Circ#2 Controller

Unit Controller

MHPR11 &12, Mechanical High Pressure Relay

Circ#1 Controller

Circuit Breaker & Switch Panel

Circ#1 & 2 EXV Drivers

External Disconnect Handle

Circ#2 Controller

TB3, Circ#2 Controller Terminal Board

TB2Circ#1 Controller Terminal Board

TB1 Unit Controller Terminal Board

IMM 1157 WGS 130A to 190A 47

Figure 21, Inner (Power) Panel

Circ#1 Solid State Starter

Circ#2 Solid State Starter

SSS1 Bypass Contactor

SSS2 Bypass Contactor

Secondary Fuses

Circ#1 Circuit Breaker

Circ#2 Circuit Breaker

Unit Disconnect Switch W/ External Handle

External Disconnect Handle

T1, Supply Voltage to 120V Transformer

Primary Fuses

Outside (Microprocessor) Panel

48 WGS 130A to 190A IMM1157

Figure 22, Circuit Breaker/Fuse Panel

Figure 23, Inner and Outer Panel Diagrams

CB11

CB22

FU7

UNITCONTROLLER

CIRCUIT CONTROLLER#1

TB1

EXV.DRIVER

#2

CONVERTER BOARD

T13T2 T14 T15 T23 T24 T25

CIRCUIT CONTROLLER#2

MODBUS CARD

EXV.DRIVER

#1

S1

SP

CS1CS2

CB12

SP

CB21

SP

F3

TB11 TB21

OUTER PANEL INNER PANEL

SSS #1 SSS #2

BYPASSCONTACTOR

D3CONTR.

BRD.

THERM-ISTORCARD

CT3

CT2

CT1

BYPASSCONTACTOR

D3CONTR.

BRD.

THERM-ISTORCARD

CT3

CT2

CT1

FU6

T1

CB1

CB2

DS1 GND

FU4

FU5

SINGLEPOINT

OR

CIR. #1

DSHANDLE

(MULTI-

POINT)

CIR. #2

DSHANDLE

(MULTI-

POINT)

MHPR1

MHPR2

RECOPTION

(DS1 DS2MULTIPOINT

POWER)

330589001 REV. 00 - Legend

S1 Main Unit On-Off Switch

Open Location

CS1, Circuit#1 On-Off Switch

CS2, Circuit#2 On-Off Switch

CB11 Circ#1 Circuit Breaker

CB12, Circ#1 Sump Heater

Open Location

CB21, Circ#2 Circuit

CB22, Circ#2 Sump Heater

Open Locations

Location for Optional 115V Receptacle

IMM 1157 WGS 130A to 190A 49

Sequence of Operation Compressor Heaters With the control power on, 120V power is applied through the control circuit Fuse FU7 to the compressor oil separator heater(HTR-OIL SEP).

Startup/Compressor Staging During cool mode the following must be true to start a circuit operating. The evaporator and condenser pump outputs must be energized and flow must be established for a period of time defined by the evaporator recirculate setpoint. Established flow will be detected by evaporator and condenser water flow switches. The water temperature leaving the evaporator must be greater than the Active Leaving Water Temperature setpoint, plus the Startup Delta-T, before a circuit will start. The first circuit to start is determined by sequence number. The lowest sequence numbered circuit will start first. If all sequence numbers are the same (default), then the circuit with the fewest number of starts will start first. During operation the slides for load and unload will be pulsed such that the active leaving water temperature setpoint is maintained. The second circuit start will occur once the first circuit has loaded to 75% slide capacity or is in Capacity Limit and the water temperature leaving the evaporator is greater than the active leaving water temperature Setpoint plus Stage Delta-T. The circuits will load or unload simultaneously through a continuous capacity control to maintain the evaporator leaving water temperature. If all sequence numbers are the same, the circuit with the most run hours will be shutdown first. The circuit with the most run hours will stop when the water temperature leaving the evaporator is less than the Active Leaving Water Temperature Setpoint minus Stage Delta-T. The last remaining circuit will shutdown when the water temperature leaving the evaporator is greater than the Active Leaving Water Temperature Setpoint minus the Stop Delta-T.

Automatic Pumpdown The WGS has separate refrigerant circuits so the refrigerant charge is stored in the condenser when the circuit is off. Pumpdown to the condenser helps keep refrigerant from migrating to the compressor. It also helps establish a pressure differential on start for oil flow. In a normal shutdown, each circuit will close its expansion valve, causing the evaporator pressure to reach a low-pressure setpoint. Once this setpoint is reached, or a specified amount of time has elapsed, the running circuit will be shut down.

Chilled Water and Condenser Water Pumps The chiller’s MicroTech II controller has a total of four pump outputs, two for the evaporator and two for the condenser. There is a manual setting in the software for the user to select either pump output 1 or 2. It is recommended that the chiller’s outputs control the water pumps, as this will offer the most protection for the unit.

Cooling Tower Control The MicroTech II controller can control the cooling tower fans and/or a tower bypass valve. This provides a simple and direct method to control the unit’s discharge pressure. Programming directions and the sequence of operation can be found in the MicroTech II manual. Some means of discharge pressure control must be installed if the condenser water temperature can fall below the values shown on page Error! Bookmark not defined..

Condenser Fan Control The MicroTech II controller can be programmed to cycle on and off condenser fans based on the discharge pressure. Details are in the MicroTech II manual.

50 WGS 130A to 190A IMM1157

Start-Up and Shutdown

Pre Start-up 1. Flush and clean the chilled-water system. Proper water treatment is required to prevent

corrosion and organic growth.

2. With the main disconnect open, check all electrical connections in control panel andstarter to be sure they are tight and provide good electrical contact. Althoughconnections are tightened at the factory, they can loosen enough in shipment to cause amalfunction.

3. Check and inspect all water piping. Make sure flow direction is correct and piping ismade to correct connection on evaporator and condenser.

4. Open all water flow valves to the condenser and evaporator.

5. Flush the cooling tower and system piping to be sure the system is clean. Startevaporator pump and manually start condenser pump and cooling tower. Check allpiping for leaks. Vent the air from the evaporator and condenser water circuit, as well asfrom the entire water system. The cooler circuit should contain clean, treated, non-corrosive water.

6. Check to see that the evaporator water temperature sensor is securely installed.

7. Make sure the unit control switch S1 is open (off) and the circuit switches CS1 and CS2are open. Place the main power disconnect switch to “on.” This will energize thecompressor sump heaters. Wait a minimum of 12 hours before starting the unit.

8. Measure the water pressure drop across the evaporator and condenser, and check thatwater flow is correct (on pages 16 and 17) per the design flow rates.

9. Check the actual line voltage to the unit to make sure it is the same as called for on thecompressor nameplate, within + 10%, and that phase voltage unbalance does not exceed2%. Verify that adequate power supply and capacity is available to handle load.

10. Make sure all wiring and fuses are of the proper size. Also make sure that all interlock wiring is completed per Daikin diagrams.

11. Verify that all mechanical and electrical inspections by code authorities have beencompleted.

12. Make sure all auxiliary load and control equipment is operative and that an adequatecooling load is available for initial start-up.

Start-up 1. Open the compressor discharge shutoff valves until backseated. Always replace valve

seal caps.

2. Open the two manual liquid line shutoff valves (king valves).

3. Verify that the compressor sump heaters have operated for at least 12 hours prior tostart-up. Crankcase should be warm to the touch.

4. Check that the MicroTech II controller is set to the desired chilled water temperature.

5. Start the system auxiliary equipment for the installation by turning on the time clock,ambient thermostat and/or remote on/off switch and water pumps.

6. Switch on the unit circuit breakers.

7. Set circuit switches CS1 and CS2 to ON for normal operation.

8. Start the system by setting the unit system switch S1 to ON.

9. After running the unit for a short time, check the oil level in each compressor, rotationof condenser fans (if any), and check for flashing in the refrigerant sight glass.

IMM 1157 WGS 130A to 190A 51

Weekend or Temporary Shutdown Move circuit switches CS1 and CS2 to the off pumpdown position. After the compressors have shut off, turn off the chilled water pump if not on automatic control from the chiller controller or building automation system (BAS). With the unit in this condition, it will not restart until these switches are turned back on.

Power to the unit (disconnect closed) so that the sump heaters will remain energized.

Start-up after Temporary Shutdown 1. Start the water pumps. 2. Check compressor sump heaters. Compressors should be warm to the touch. 3. With the unit switch S1 in the “ON” position, move the circuit switches CS1 and CS2 to

the ON position. 4. Observe the unit operation for a short time, noting unusual sounds or possible cycling of

compressors.

Extended Shutdown 1. Close the manual liquid line shutoff valves. 2. After the compressors have shut down, turn off the water pumps. 3. Turn off all power to the unit. 4. Move the unit control switch S1 to the “OFF” position. 5. Close the discharge shutoff valves. 6. Tag all opened disconnect switches to warn against start-up before opening the

compressor suction and discharge valves. 7. Drain all water from the unit evaporator, condenser and chilled water piping if the unit

is to be shut down during the winter and exposed to below-freezing temperatures. Do not leave the vessels or piping open to the atmosphere over the shutdown period to help prevent excessive corrosion.

Start-up after Extended Shutdown 1. Inspect all equipment to see that it is in satisfactory operating condition. 2. Remove all debris that has collected on the surface of the condenser coils (remote

condenser models) or check the cooling tower, if present. 3. Open the compressor discharge valves until backseated. Always replace valve seal caps. 4. Open the manual liquid line shutoff valves. 5. Check circuit breakers. They must be in the “OFF” position. 6. Check to see that the circuit switches CS1 and CS2 and the unit control switch S1 are in

the “OFF” position. 7. Close the main power disconnect switch. The circuit disconnects switches should be off. 8. Allow the sump heaters to operate for at least 12 hours prior to start-up. 9. Start the chilled water pump and purge the water piping as well as the evaporator in the

unit. 10. Start the system auxiliary equipment for the installation by turning on the time clock,

ambient thermostat and/or remote on/off switch. 11. Check that the MicroTech II controller is set to the desired chilled water temperature. 12. Switch the unit circuit breakers to “ON.” 13. Start the system by setting the system switch S1 and the circuit switches to “ON”.

! CAUTION

52 WGS 130A to 190A IMM1157

Most relays and terminals in the control center are powered when S1 is closed and the control circuit disconnect is on. Therefore, do not close S1 until ready for start-up or serious equipment damage can occur.

14. After running the unit for a short time, check the oil level in the compressor oil sight

glass and check the liquid line sight glass for bubbles.

System Maintenance

General To provide smooth operation at peak capacity and to avoid damage to package components, set and follow a program of periodic inspections. The following items are intended as a guide to be used during inspection and must be combined with sound refrigeration and electrical practices to help provide trouble-free performance.

The liquid line sight glass/moisture indicator on all circuits must be checked to be sure that the glass is full and clear and that the moisture indicator indicates a dry condition. If the indicator shows that a wet condition exists or if bubbles show in the glass, even with a full refrigerant charge, the filter-drier element must be changed.

Water supplies in some areas can foul the water-cooled condenser to the point where cleaning is necessary. The fouled condenser will be indicated by an abnormally high condenser approach temperature (saturated discharge temperature minus leaving condenser water temperature) and can result in nuisance trip-outs. To clean the condenser, mechanical cleaning or a chemical descaling solution should be used according to the manufacturer’s directions.

Systems with remote air-cooled condensers require periodic cleaning of the finned surface of the condenser coil. Cleaning can be accomplished by using a cold water spray, brushing, vacuuming, or high-pressure air. Do not use tools that could damage the coil tubes or fins.

The compressor oil level must be checked periodically to be sure that the level is near the center of the oil sight glass located on the compressor (see Figure 24). Low oil level can cause inadequate lubrication and if oil must be added, use oils referred to in the following “Compressor Lubrication” section.

A pressure tap has been provided on the liquid line downstream of the filter-drier and solenoid valve but before the expansion valve. An accurate subcooled liquid pressure and temperature can be taken here. The pressure read here could also provide an indication of excessive pressure drop through the filter-drier and solenoid valve due to a clogging filter-drier. Note: A normal pressure drop through the solenoid valve is approximately 3 psig (20.7 kPa) at full load conditions.

! CAUTION

A blown fuse or tripped protector indicates a short ground or overload. Correct the problem before replacing fuses or restarting compressor. The control panel must be serviced by a trained and qualified technician. Improper service can damage equipment.

IMM 1157 WGS 130A to 190A 53

! CAUTION

The panel is always energized, even when the system switch is off. Pull the main unit disconnect to de-energize the panel and crankcase heaters. Failure to do so can result in severe personal injury or death. If motor or compressor damage is suspected, do not restart until qualified service personnel have checked the unit.

Electrical Terminals ! DANGER

To avoid severe injury or death from electric shock, turn off all power and lockout and tag-out electric source before continuing with the following service. Note unit might be powered from multiple sources.

POE Lubrication ! WARNING

This unit contains POE lubricants that must be handled carefully and the proper protective equipment (gloves, eye protection, etc.) must be used when handling POE lubricant. POE must not come into contact with any surface or material that might be harmed by POE, including certain polymers (e.g. PVC/CPVC and polycarbonate piping).

No routine lubrication is required on WGS units.

Compressor oil must be ICI RL68HB, Daikin Part Number 735030446 in a 1-gallon container. This is synthetic polyolester oil with anti-wear additives and is highly hygroscopic. Care must be taken to minimize exposure of the oil to air when charging oil into the system.

Figure 24, Compressor Oil Filter

The Lub Control measures the pressure drop across the lubricant filter and shuts off the compressor if the differential pressure becomes too high. It is reset through the circuit controller. Change oil when pressure drop exceeds 15 psig.

Compressor Oil Filter

Oil Level Sight Glass

Lub Control

54 WGS 130A to 190A IMM1157

Sight Glass and Moisture Indicator The refrigerant sight glasses should be observed periodically. A monthly observation should be adequate. A clear glass of liquid indicates that there is adequate refrigerant charge in the system to provide proper feed through the expansion valve. The sight glass should be clear when the ambient temperature is above 75F (23C) and all fans on a circuit are running, when air cooled.

Bubbling refrigerant in the sight glass may occur at other conditions and may indicate that the system is short of refrigerant charge. Refrigerant gas flashing in the sight glass could also indicate an excessive pressure drop in the line, possibly due to a clogged filter-drier or a restriction elsewhere in the system. An element inside the sight glass indicates what moisture condition corresponds to a given element color. If the sight glass does not indicate a dry condition after about 12 hours of operation, the unit should be pumped down and the filter-driers changed.

If the system is suspected of being short of refrigerant, a qualified service technician with EPA certification should be contacted to thoroughly check out the unit and add refrigerant if necessary.

Sump Heaters The compressors are equipped with sump lubricant heaters. The function of the heater is to keep the temperature in the crankcase high enough to prevent refrigerant from migrating to the crankcase and condensing in the lubricant during the off-cycle. When a system is to be started up initially, the power to the heaters should be turned on for at least 12 hours before the compressors are started. The sump should be up to about 80°F (26.7°C) before the system is started up (warm to the touch), to minimize lubrication problems or liquid slugging of compressor on start-up.

If the crankcase is cool (below 80°F) (26.7°C) and the oil level in the sight glass is full to top, allow more time for oil to warm before starting the compressor.

The crankcase heaters are on whenever power is supplied to the unit and the compressor is not running.

IMM 1157 WGS 130A to 190A 55

Maintenance Schedule

I. Compressor A. Performance Evaluation (Log & Analysis) * O B. Motor Meg. Windings X

Ampere Balance (within 10%) X

Terminal Check (tight connections, porcelain clean) X

Motor Cooling (check temperature) X

C. Lubrication System Oil Level O X

Oil Appearance (clear color, quantity) O

Oil change if indicated by oil analysis X

II. Controls A. Operating Controls Check Settings and Operation X

B. Protective Controls Test Operation of: Alarm Relay X Pump Interlocks X High and Low Pressure Cutouts X III. Condenser B. Test Water Quality X C. Clean Condenser Tubes (or as required) X D. Eddy current Test - Tube Wall Thickness X E. Seasonal Protection X IV. Evaporator B. Test Water Quality X C. Clean Evaporator Tubes (or as required) X D. Eddy current Test - Tube Wall thickness (or as required) X E. Seasonal Protection X V. Expansion Valves A. Performance Evaluation (Superheat Control) X VI. Compressor - Chiller Unit A. Performance Evaluation O B. Leak Test: Compressor Fittings and Terminal X Piping Fittings X Vessel Relief Valves X C. Vibration Isolation Test X D. General Appearance: Paint X Insulation X

VII. Starter(s) A. Examine Contactors (hardware and operation) X B. Verify Overload Setting and Trip X C. Test Electrical Connections X

Key: O = Performed by in-house personnel X = Performed by service personnel

56 WGS 130A to 190A IMM1157

System Service

! DANGER

Service on this equipment must be performed by trained, experienced technicians. Causes for repeated tripping of equipment protection controls must be investigated and corrected. Disconnect all power (there may be multiple sources) before doing any service inside the unit or severe personal injury or death can occur.

NOTE: Anyone servicing this equipment must comply with the requirements set forth by the EPA concerning refrigerant reclamation and venting.

Filter-Driers

Figure 25, FIlter-Drier Assembly

There is a filter-drier assembly for each circuit located in the liquid line. The cartridges should be changed when the pressure drop across them exceeds the values shown in Table 26 below, when measured at the Schrader fittings before and after the housing. To change the filter:

1. Shut off the circuit. This will close the expansion valve.

2. Shut off the condenser liquid shutoff valve, isolating the filter-drier.

3. Remove any remaining refrigerant from one of the Schrader valves using approved EPA procedures.

4. Remove the housing cover, after checking that there is no positive pressure in the filter-drier.

5. Replace the filters, reinstall the cover, evacuate, and open the liquid line valve.

Table 26, Liquid Line Filter-Drier Pressure Drop PERCENT CIRCUIT MAXIMUM RECOMMENDED PRESSURE

100% 7 (48.3)

75% 5 (34.5)

50% 3 (20.7)

25% 3 (20.7)

Evaporator

Condenser

Schrader Fitting

Schrader Fitting

Sensor

ExpansionValve

Filter-Drier

SightGlass

Liquid LineValve

ExpansionValve

IMM 1157 WGS 130A to 190A 57

Electronic Expansion Valve The electronic expansion valve is located in the liquid line entering the evaporator.

The expansion valve meters the amount of refrigerant entering the evaporator to match the cooling load. It does this by maintaining constant condenser subcooling. (Subcooling is the difference between the actual refrigerant temperature of the liquid as it leaves the condenser and the saturation temperature corresponding to the condenser pressure.) All WGS chillers are factory set at 20F subcooling at 100% slide position and 10F (12.2C) subcooling at minimum slide position. These settings can be offset by discharge superheat.

When the control panel is first powered, the microprocessor will automatically step the valve to the fully closed (shut) position and the indicator light on the EXV will show closed position. The valve can also be heard closing as it goes through the steps. The valve will take approximately 30 seconds to go from a full open position to a full closed position.

The position of the valve can be viewed at any time by using the MicroTech II controller keypad through the View Refrigerant menus. There are 6386 steps between closed and full open. There is also a sight glass on the EXV to observe valve movement.

If the problem can be traced to the power element only, it can be unscrewed from the valve body without removing the valve, but only after pumping the unit down.

Evaporator The evaporator is a shell-and-tube unit. Normally no service work is required on the evaporator.

Water-cooled Condenser The condensers are of the shell-and-tube type with water flowing through the tubes and refrigerant in the shell. External finned copper tubes are rolled into steel tube sheets. Integral subcoolers are incorporated on all units. All condensers are equipped with 350 psig (2413 kPa) relief valves. Normal tube cleaning procedures can be followed.

58 WGS 130A to 190A IMM1157

Troubleshooting Chart PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS

Compressor Will Not Run

1. Main switch, circuit breakers open. 2. Fuse blown. 3. Thermal overloads tripped or fuses

blown. 4. Defective contactor or coil. 5. System shut down by equipment

protection devices. 6. No cooling required. 7. Liquid line solenoid will not open. 8. Motor electrical trouble. 9. Loose wiring.

1. Close switch 2. Check electrical circuits and motor

winding for shorts or grounds. Investigate for possible overloading. Replace fuse or reset breakers after fault is corrected.

3. Overloads are auto reset. Check unit closely when unit comes back on line.

4. Repair or replace. 5. Determine type and cause of shutdown

and correct it before resetting protection switch.

6. None. Wait until unit calls for cooling. 7. Repair or replace coil. 8. Check motor for opens, short circuit, or

burnout. 9. Check all wire junctions. Tighten all

terminal screws.

Compressor Noisy or Vibrating

1. Flooding of refrigerant into compressor. 2. Improper piping support on suction or

liquid line. 3. Worn compressor.

1. Check superheat setting of expansion valve.

2. Relocate, add or remove hangers. 3. Replace.

High Discharge Pressure

1. Condenser water insufficient or temperature too high.

2. Fouled condenser tubes (water-cooled condenser). Clogged spray nozzles (evaporative condenser). Dirty tube and fin surface (air cooled condenser).

3. Noncondensables in system. 4. System overcharge with refrigerant. 5. Discharge shutoff valve partially closed. 6. Condenser undersized (air-cooled). 7. High ambient conditions (air-cooled).

1. Readjust temperature control or water regulating valve. Investigate ways to increase water supply.

2. Clean.

3. EPA purge the noncondensables. 4. Remove excess refrigerant. 5. Open valve. 6. Check condenser rating tables against

the operation. 7. Check condenser rating tables against

the operation.

Low Discharge Pressure

1. Faulty condenser temp. regulation. 2. Insufficient refrigerant in system. 3. Low suction pressure. 4. Condenser too large. 5. Low ambient conditions (air-cooled)

1. Check condenser control operation. 2. Check for leaks. Repair and add charge. 3. See corrective steps for low suction

pressure below. 4. Check condenser rating table against the

operation. 5. Check condenser rating tables against

the operation.

High Suction Pressure

1. Excessive load. 2. Expansion valve overfeeding.

1. Reduce load or add additional equipment.

2. Check remote bulb. Regulate superheat.

Low Suction Pressure

1. Lack of refrigerant. 2. Evaporator dirty. 3. Clogged liquid line filter-drier. 4. Expansion valve malfunctioning. 5. Condensing temperature too low. 6. Compressor will not unload. 7. Insufficient water flow.

1. Check for leaks. Repair and add charge. 2. Clean chemically. 3. Replace cartridge(s). 4. Check and reset for proper superheat.

Replace if necessary. 5. Check means for regulating condensing

temperature. 6. See corrective steps for failure of

compressor to unload. 7. Adjust flow.

Little or No Oil Pressure

1. Clogged suction oil strainer. 2. Excessive liquid in crankcase. 3. Low oil level. 4. Flooding of refrigerant into crankcase.

1. Clean. 2. Check sump heater. Reset expansion

valve for higher superheat. Check liquid line solenoid valve operation.

3. Add oil. 4. Adjust expansion valve.

IMM 1157 WGS 130A to 190A 59

PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS

Compressor Loses Oil

1. Lack of refrigerant.

2. Velocity in risers too low (A-C only).3. Oil trapped in line.

1. Check for leaks and repair. Addrefrigerant.

2. Check riser sizes.3. Check pitch of lines and refrigerant

velocities.

Motor Overload Relays or Circuit Breakers Open

1. Low voltage during high load conditions.

2. Defective or grounded wiring in motor orpower circuits.

3. Loose power wiring.4. High condensing temperature.

5. Power line fault causing unbalancedvoltage.

6. High ambient temperature around theoverload relay

1. Check supply voltage for excessive linedrop.

2. Replace compressor-motor.

3. Check all connections and tighten.4. See corrective steps for high discharge

pressure.5. Check Supply voltage. Notify power

company. Do not start until fault iscorrected.

6. Provide ventilation to reduce heat.

Compressor Thermal Switch Open

1. Operating beyond design conditions.

2. Discharge valve partially shut.

1. Add facilities so that conditions are withinallowable limits.

2. Open valve.

Freeze Protection Opens

1. Thermostat set too low.2. Low water flow.3. Low suction pressure.

1. Reset to 42°F (6°C) or above.2. Adjust flow.3. See “Low Suction Pressure.”

Warranty Statement

Limited Warranty

Daikin International’s written Limited Product Warranty and any other expressly purchased Extended Warranty are the only warranties applicable. Consult your local Daikin Representative for warranty details. Refer to Form 933-430285Y. To find your local Daikin Representative, go to www.DaikinApplied.com .

60 WGS 130A to 190A IMM1157

(800) 432-1342 www.DaikinApplied.com IMM 1157 (3/12)

Daikin Training and Development

Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com and click on training, or call 540-248-9646 to speak to the Training Department.

Warranty

All Daikin equipment is sold pursuant to Daikin’s Standard Terms and Conditions of Sale and Limited Product Warranty. Consult your local Daikin Representative for warranty details. Refer to form 933-430285Y. To find your local representative, go to www.DaikinApplied.com

This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.DaikinApplied.com .

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