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WSHP-DS-6
March 2000
Water Source
Heat Pump
Water-to-Water
Model WPWD
WSHP-DS-6
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Introduction The WPWD product is a heating In the heating mode, the water-to- and cooling hydronic fluid water-to- water unit efficiently extracts heat water heat pump capable of pro- from a water source (source side) ducing water temperature up to such as a well, lake, boiler/tower loop or closed ground loop heat-ex- 130 F or temperatures down to changer, then transfers the heat to 25 F. This extended operating another flow of water (load side). range offers great opportunities in The am
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Table of Contents Introduction 2 Features and Benefits 4 Model Number Description 7 General Data 8 Application Considerations 9 Electrical Data 18 Performance Data 19 Dimensional Data 25 Wiring Diagram 28 Accessory Options 30 Mechanical Specifications 31 3
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Features General and Benefits WPWD cabinet includes full length General channel stiffeners underneath the unit. The water source heat pump model WPWD (water-to-water) offers a Heat Exchanger range of capacities from 2 tons to 6 The water to refrigerant heat ex- tons. All units are housed in one changers are made of stainless standard compact cabinet. steel brazed plate. This design pro- Cabinet vides a larger amount of surface area for heat exchange between The cabinet, which allows ea
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Features Controls and Benefits 24 Volt Controls All electrical controls and safety de- 50 VA Transformer Lockout vices are factory wired, tested, and 24 VAC Contactor Relay mounted in the unit. The control package includes: Ground Compressor contactor 24 Volt transformer Lockout relay Compressor run capacitor (1- Compressor phase units only) Run Capacitor Reversing valve coil (For heat Low Voltage pump only) High Voltage 2 Amp Fuse Fuse (for desuperheater) 10 Pole Terminal (for use
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Features Heat and Recovery Benefits The unit employs a circulating pump Desuperheater Option to move water through a double wall The desuperheater option is a heat heat exchanger. It then returns the recovery system packaged within heated water to the water tank. This the water-to-water unit. This option water is heated by superheated re- captures heat energy from the heat frigerant discharge gas from the pump for considerable cost savings compressor. This heat energy can all year. Si
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Model Number Description 1 5 10 15 Digit 11: Freeze Protection Digits 1 & 2: Product Type (source side) WP = Trane Commercial Water 1 = Brazed Plate Heat Exchanger Source Heat Pump with 35 F (1.67 C) Freezestat 2 = Brazed Plate Heat Exchanger Digit 3: Product Configuration with 20 F (-6.67 C) Freezestat W = Water-to-Water Digit 4: Development Sequence D Digit 12: Freeze Protection (load side) 1 = Brazed Plate Heat Exchanger Digits 5-7: Unit Nominal Capacity with 35 F (1.67 C) Freezestat 024 = 24
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General Data Table G-1: Physical Data (English) Model: WPWD 024 036 042 048 060 072 Width of cabinet (in) 23 23 23 23 23 23 Width of cabinet and connections (in) 24.8 24.8 24.8 24.8 24.8 24.8 Unit Size Height (in) 24.3 24.3 24.3 24.3 24.3 24.3 Depth (in) 23.3 23.3 23.3 23.3 23.3 23.3 Compressor Type Scroll Scroll Scroll Scroll Scroll Scroll R-22 Refrigerant (lbs) 3.25 3.375 3.50 4.00 4.25 4.25 Approximate Weight With crate (lbs) 163 183 203 214 244 277 (lbs) Table G-2: Specifications (English)
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Application Considerations Closed Loop System Closed loop systems (both ground source and surface water) provide heat rejection and heat addition to maintain proper water source temperatures. Operating and maintenace cost are low because an auxillary fossil fuel boiler and cooling tower are not required to maintain the loop temperature. The technology has advanced to the point where many electric utilities and rural electric cooperatives are offering incentives for the installation of geothermal
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Application Considerations Open Loop System Where an existing or proposed well can provide an ample supply of suitable quality water, ground water systems may be very efficient. (See Figure 7) Operation and benefits are similar to those for closed loop systems. There are however several considerations that should be addressed prior to installation. An acceptable way to discharge the significant volume of used water from the heat pump should be defined. It may be necessary to install a recha
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Application Source Side Considerations vs. Load Side source side heat exchanger to the Source vs. Load load side heat exchanger. The model WPWD water-to-water The “load side” heat exchanger system contains two water to refrig- takes the place of a DX (direct ex- erant heat exchangers. The two pansion) air coil. It provides treated heat exchangers enable the system fluid (hot or cold) to a mechanical to be divided into a source and load device. These mechanical devices separation. includ
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Application Closed Loop Considerations Geothermal Hydronic Ice Melting Via a Water-to-Water Unit Geothermal Space Temperature Heating / Cooling Refrigeration Equipment (Closed) Ground Loop Heat Exchanger Cold climates may take an even Geothermal Typical Benefits greater advantage of the heat Integrated System Annual energy savings means rejected by the stores refrigeration The Trane ground source heat lower operational costs equipment and space conditioning pump is highly efficient in service
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Application Fresh Air Considerations Ventilation Water-Out Fresh Air Ventilation (source) with Water-to-Water Units Water-Out Water-In (load) (source) Water-In Exhaust (load) Air Fresh Air Geothermal Space Heating and Cooling (Closed) Ground Loop Heat Exchanger Water-to-Water and Fresh Air Ventilation Geothermal energy systems take the makeup air unit hydronic coil to advantage of the fact that heat the makeup air to maintain subsurface earth temperatures are building requirements. This co
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Application Fresh Air Considerations Ventilation Mechanical EXHAUST OUTSIDE AIR AIR HOT WATER COIL AIR HANDLER AIR HANDLER EXP TANK AUTOMATIC AIR VENT HAND PUMP WPWD DRAIN VA PRESSURE WPWD RELIEF VA WPWD WPWD BALL VA SUPPLY RETURN 14 EXHAUST AIR FROM TOILET RMS EXHAUST AIR TO HEAT PUMPS
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Application Central Considerations Pumping System 6 7 1 5 2 4 3 Figure 10: Central pumping system installation minal devices with 45 F or General Central Pump 120 F fluid. Application A central pumping system involves The sound attenuation pad should be slightly oversized for a single pump design usually locat- Ball valves should be installed unit. This field supplied product ed within a basement or mechanical in the supply and return lines is recommended for sound for unit isolatio
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Application Well Water Considerations Systems 7 6 5 9 8 1 3 2 4 Figure 11: Well water installation The sound attenuation pad Well Water General should be slightly oversized for Application the unit. This field supplied A well water application involves an product is recommended for Ball valves should be installed open loop water supply. The water sound absorption of unit. in the supply and return lines is drawn from an open well or pond The low voltage control con- for unit iso
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Application Distributed Considerations Pumping System 8 7 6 1 5 2 4 3 Figure 12: Distibuted pumping installation The sound attenuation pad General Earth Coupled should be slightly oversized for Application the unit. This field supplied A distributed pumping system con- product is recommended for tains either a single or dual pump Ball valves should be installed sound absorption of unit. module connected directly to the in the supply and return lines The low voltage control con- fo
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Electrical Data Table E-1: Electrical Data 024 036 042 048 060 072 Model: WPWD Voltage 208-230/60hz/1phase Compressor RLA 11.4 15 18.4 20.4 28 32.1 Compressor LRA 56 73 95 109 169 169 Minimum Circuit Ampacity 16 21 25.8 28.6 39 45 Max Fuse Size 25 30 40 45 60 70 Aux Pump Amps 2.5 2.5 2.5 2.5 2.5 2.5 Desuperheater Min Cir Ampacity 14.3 18.8 23 25.5 35 40.1 Desuperheater Pump RLA 0.4 0.4 0.4 0.4 0.4 0.4 Voltage 208-230/60hz/3phase Compressor RLA - 10.7 11.4 13.9 20 19.3 Compressor LRA - 63 77 88
