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Installation
Owner
Diagnostics
Water-to-Water
Water-Source Heat Pump
Models WPWD, GSWD and EXWA
Models
“A” and later Design Sequence
WPWD EXWA
024-072 – 60 HZ 240 – 60 HZ
GSWD
024-072 – 60 HZ
WSHP-SVX02A-EN
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Notice NOTICE: Warnings and Cautions appear at appropriate sections throughout this manual. Read these carefully. WARNING -Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION -Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices. CAUTION -Indicates a situation that may result in equipment or property-damage-only accidents.
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Contents Installation/Startup/Commissioning 4 Pre-installation Checklist 4 5 General Information 6 Dimensions/Weights 10 Installation Instructions 19 Electrical Requirements 20 Pre-Startup Checklist 21 Startup/Commissioning 21 Sequence of Operation 22 Operating Pressures 30 24 Startup Checklist & Log 25 Maintenance 26 Warranty Information 28 Troubleshooting Checklist 29 Unit Wiring WSHP-SVX02A-EN 3
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Pre-installation Checklist WARNING Fiberglass Wool! Product contains fiberglass wool. Disturbing the insulation in this product during installation, maintenance or repair will expose you to airborne particles of glass wool fibers and ceramic fibers known to the state of California to cause cancer through inhalation. Glass wool fibers may also cause respiratory, skin or eye irritation. Jobsite Inspection Always perform the following checks before accepting a unit: 1. Verify that the nameplat
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General Information Unit Nameplate ton through 6-ton equipment, and at (which may be available for field use). The unit nameplate is located at the the power block for the 20-ton equip- See page 17 for diagnostic informa- front of the unit. It includes the unit ment. tion. model number, serial number, electri- Desuperheater All low voltage wiring is made at the cal characteristics, refrigerant charge, (Option for 2-ton through 6-ton units) unit’s low voltage terminal board. and other pertinen
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Dimensions/Weights/ Clearance Table 1: Unit weights Shipping Shipping WARNING Size Weight Weight with pallet (lb) w/o pallet (lb) Improper Unit Lift! Test lift unit approximately 24 inches to verify proper 024 163 153 center of gravity lift point. To avoid dropping of unit, 036 183 173 reposition lifting point if unit is not level. Failure to properly lift unit could result in death or serious injury 042 203 193 or possible equipment or property-only damage. 048 214 204 060 244 234 072 27
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Dimensions WPWD/GSWD 024-036 WSHP-SVX02A-EN 7
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Dimensions WPWD/GSWD 042-072 8 WSHP-SVX02A-EN
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Dimensions EXWA 240 WSHP-SVX02A-EN 9
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Installation General Installation Checks WARNING The checklist below is a summary of Hazardous the steps required to successfully in- stall a unit. This checklist is intended to Voltage! acquaint the installing personnel with Disconnect all electric power, procedures required in the installation including remote disconnects process. It does not replace the de- before servicing. Follow proper lockout/tagout procedures to tailed instructions called out in the ap- ensure the power can not
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Installation Water Connection WARNING Connect the source-side and load-side Improper Unit Lift! water-in/water-out from the water-to- Test lift unit approximately 24 water heat pump to the source system inches to verify proper center of and the load system. gravity lift point. To avoid Note: The source for a water-to-water dropping of unit, reposition lifting point if unit is not level. Failure to heat pump is typically a boiler/cooling properly lift unit could result in tower or geoth
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Installation Cleaning and Flushing bled off. Note: Vents should be open when the the Water Loop (3) With the air vented and the water pumps and supplementary heat sys- After the piping system is complete, circulating, the entire system tem are shut down. the flexible hose connectors should be should be checked for leaks with re- doubled back to complete the water pairs made as required. Figure 4: Flushing water loop circuit external to the unit (avoiding (4) Operate the supplementary trash set
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Installation Supply/Return Pipe Connections (3) The water lines should be routed to the Loop Pump Kit not to interfere with access to the unit. (1) Connect the supply and return hos- The use of a short length of high pres- es to the water-inlet (from supply) and sure hose with the swivel fitting may water-outlet (to return) of the unit. The simplify the connections and prevent rubber gaskets for the water-in and vibration. Pressure/Temperature (P/T) water-out connections are located in port
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Installation Water Heater Hook-up (option) Figure 8: Water heater kit Instructions for connection from the desuperheater (option) water-in/out to the domestic hot water heater may be found in WSHPC-IN-4 or 72-9006-02. This water heater kit (Figure 8) ships in all units with the desuperheater op- tion. The kit is zip tied to the compres- sor base; and consists of piping connections and shut-off valve. For units containing the desuperheat- er option, the desuperheater pump fuse is located w
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Installation Filling the Loop Pump Kit System Once the loop, pump module and unit are fully connected, the system will need to be filled with water or water/ antifreeze solution. See Page 14 for an- tifreeze/water mixture by volume. Fill both sides of the outside portion of the loop first via the pump module. The hose kit and unit should be filled last after purging of the ground loop is complete. To fill the outside loop; (1) attach a water hose to the 1-inch FPT brass valve ports loca
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Installation Power Wiring Field Installed Power Wiring The high voltage connection is made Power wiring to the equipment must at the 1TB1 terminal block for the 20- conform to National and Local Electric ton equipment, and at 1K1 for the 2- Codes (NEC) by a professional electri- ton through 6-ton equipment. The ter- cian. minal block or contactor is located in- side the unit control box. Refer to the customer connection diagram that is WARNING shipped with the unit for specific ter- mination
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Installation Low Voltage Wiring Controls Using 24 VAC Before installing any wire, refer to the electrical access locations on the unit submittals located on pages 7 through 9. Ensure that the AC control wiring be- tween the controls and the unit’s ter- mination point does not exceed three (3) ohms/conductor for the length of the run. Note: Resistance in excess of 3-ohms per conductor may cause component failure due to insufficient AC voltage supply. Figure 9: Low voltage connection Chec
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Installation Changing Freezestat or Low Pres- (2) A unit with a 20°F freezestat is go- the old low pressure cutout to the new sure Cutout Switches ing to be put on an open well system low pressure cutout. (WPWD/GSWD models ONLY) or a closed loop system with NO anti- Identifying the Low Pressure Cutouts Each unit has two factory installed low freeze solution. By definition, the unit The 7 psig low pressure cutout is used pressure cutout switches and one must have a 35°F freezestat installed w
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Electrical Requirements Table E-1: Electrical performance WPWD/EXWA Model/MBH VOLTS-AC/HZ/PH Min. Max Compressor LRA No. Without Desup With Desup Util. Util. Each of MCA Max Desup MCA Max Volt Volt RLA Comp Fuse RLA Fuse WPWD024 208-230/60/1 197 253 11.4 56.0 1 14.3 25 0.4 14.7 25 220-240/50/1 198 264 9.6 47.0 1 12.0 20 0.4 12.4 20 265/60/1 239 292 9.6 47.0 1 12.0 20 0.4 12.4 20 WPWD036 208-230/60/1 197 253 15.0 73.0 1 18.8 30 0.4 19.2 30 208-230/60/3 197 253 10.7 63.0 1 13.4 20 0.4 13.8 20 220-
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Pre-Start Checklist Pre-Start-up Checklist Before energizing the unit, the following system devices must be checked: ____ Is the high voltage power supply correct and in accordance with the nameplate ratings? ____ Is the field wiring and circuit protection the correct size? ____ Is the low voltage control circuit wiring correct per the unit wiring diagram? ____ Is the piping system clean/complete and correct? (A recommendation of all system flushing of debris from the water- to-refrigerant h
