Table of Contents
Troubleshooting
Related Manuals for Water Furnace 502W12
Summary of Contents for Water Furnace 502W12
- Page 1 502W12 High Temp Hydronic Geothermal Heat Pump • R-134a Refrigerant • 7 Ton Dual Capacity Installation Information Water Piping Connections Electrical Data Microprocessor Control Startup Procedures Preventive Maintenance IM2517WN 03/13...
-
Page 3: Table Of Contents
5 SERIES 502W12 INSTALLATION MANUAL Table of Contents Model Nomenclature ............4 General Installation Information . -
Page 4: Model Nomenclature
3 = IntelliStart NOTE: MUI = Medium User Interface All 5 Series 502W12 product is safety listed under UL1995 thru ETL and performance listed with AHRI in accordance with standard 13256-2. The 5 Series 502W12 is also Energy Star rated. -
Page 5: General Installation Information
5 SERIES 502W12 INSTALLATION MANUAL General Installation Information Safety Considerations Unit Location Installing and servicing air conditioning and heating Provide sufficient room to make water and electrical equipment can be hazardous due to system pressure and connections. If the unit is located in a confined space, electrical components. -
Page 6: Field Connected Water Piping
Load Flow Rate with the ability to measure water temperatures and The load flow on the 5 Series 502W12 should be 20 gpm pressures. The water lines should be routed so as not to (typically the rated flow). Refer to the table below. This interfere with access to the unit. -
Page 7: Open Loop Well Water Systems
5 SERIES 502W12 INSTALLATION MANUAL Field Connected Water Piping cont. Open Loop Well Water Systems Installation of an open loop system is not recommended unless water quality guidelines are met. Well Tank Earth Coupled Systems All supply and return water piping should be insulated to... -
Page 8: Typical Application Piping
5 SERIES 502W12 INSTALLATION MANUAL Typical Application Piping 30 PSI Pressure RELIEF VALVE Gauge Pressure Vent Reduction LOAD PUMP HYDRONIC LOAD Separator Back Flow Preventer / Expansion Pressure Pressure Relief Valve Tank Reduction Dielectric Unions STORAGE TANK WaterFurnace 5 Series 502W12 Hose Kit 1-1/2˝... -
Page 9: Water Quality
5 SERIES 502W12 INSTALLATION MANUAL Water Quality The following table outlines the water quality guidelines for unit General heat exchangers. If these conditions are exceeded, a secondary Reversible chiller systems may be successfully applied in a heat exchanger is required. Failure to supply a secondary heat wide range of commercial and industrial applications. -
Page 10: Dimensional Data
5 SERIES 502W12 INSTALLATION MANUAL Dimensional Data NHW084 - Top Waterline Configuration NHW084 - Back Waterline Configuration... -
Page 11: Physical Data
5 SERIES 502W12 INSTALLATION MANUAL Physical Data Model Compressor (2 each) Scroll Factory Charge R-134a, oz [kg] 76 [2.16] Load Water Connection FPT - in 1.25 Source Water Connection FPT - in 1.25 Weight - Operating, lb [kg] 420 [190]... -
Page 12: Wiring Schematics
5 SERIES 502W12 INSTALLATION MANUAL Wiring Schematics cont. 208-230/60/1 Compressor Compressor Current Switch ( Circuit A ) ( Circuit B ) Current Switch Blue Blue Black Black Black Black Black Black Tan (52B) Tan (52A) Unit Power Supply #2 Unit Power Supply #1... - Page 13 5 SERIES 502W12 INSTALLATION MANUAL Wiring Schematics cont. 208-230/60/1 cont. External Timer (delay on close) NOTE 10 Source Load Black (101) Black Pump Pump NOTE 1 208V Blue 230V Black/White Yellow Black (C) Black/White (26) Black (95) 24VAC COM Red (104)
- Page 14 5 SERIES 502W12 INSTALLATION MANUAL Wiring Schematics cont. 208-230/60/1 with IntelliStart Compressor ( Circuit A ) Compressor Current Switch Current Switch ( Circuit B ) Blue Black Blue Black Black Black Black Black Blue Blue Tan (52B) Tan (52A) Pink...
- Page 15 5 SERIES 502W12 INSTALLATION MANUAL Wiring Schematics cont. 208-230/60/1 with IntelliStart cont. External NOTE 10 Load Source Timer (delay on close) Pump Pump Black (101) Black NOTE 1 208V Blue 230V Black/White Yellow Black (C) Black/White (26) Black (95) 24VAC COM...
- Page 16 5 SERIES 502W12 INSTALLATION MANUAL Wiring Schematics cont. MUI Wiring Diagram Instructions : 5VDC DLI Card 1.) Disconnect all power sources to the unit 2.) Remove MUI from Back Plate 3.) Follow Wiring Instruction Below NOTE 7 4.) Reinstall MUI to Back Plate...
-
Page 17: Line Voltage
5 SERIES 502W12 INSTALLATION MANUAL Field Wiring and Control Setup Figure 2 - High Voltage Connections Line Voltage High Voltage Connections Connect power wiring as shown in Figure 2. 208 Volt Operation Switch red and blue transformer wires for 208V operation. -
Page 18: Control Features
5 SERIES 502W12 INSTALLATION MANUAL Field Wiring and Control Setup cont. Accessory Relay Setup °F or °C - Unit of Measure The accessory output set to “close” upon Y1 compressor call Degrees Fahrenheit is factory set, however degrees Celsius (compressor is delayed 90 sec. after Y1) but can be set to can be selected using the following procedure: “open”... - Page 19 5 SERIES 502W12 INSTALLATION MANUAL Control Features cont. Basic Freeze Detection Operation: “Comp1 or condition, the compressor is allowed to operate so that Comp2 Freeze” Alarm the refrigerant temperature may eventually be at the threshold of the freeze detection setpoint. NOTE: This This alarm can be triggered by one of two detection schemes.
-
Page 20: Sequence Of Operation
5 SERIES 502W12 INSTALLATION MANUAL Control Features cont. is open continuously for (30) seconds the compressor Compressor 2 Alarm Output (DO-6) output for that circuit will be disabled. The compressor The compressor 2 alarm output will be enabled when stage... -
Page 21: Inputs And Outputs Configuration
5 SERIES 502W12 INSTALLATION MANUAL Inputs and Outputs Confi guration DUAL STAGE WW Input Name Input Output Name Output Entering Load Water Temperature AI 1 Compressor 1 Leaving Load Water Temperature 1 AI 2 Compressor 2 Source Heating Freeze Detection 1... - Page 22 5 SERIES 502W12 INSTALLATION MANUAL Unit Display and Interface cont. MUI Menu Navigation Welcome Info Temp Stat Outputs Settings Maint Alarm_History Temp Info Stat Outputs Settings Outputs Status Dual Stage Temperatures Settings Unit Status Auto Comp1 Status Water-to-Water Enter Load 77.2°F...
- Page 23 5 SERIES 502W12 INSTALLATION MANUAL Unit Display and Interface cont. Source Flow – Source Flow Switch is Not Closed Menu and Menu Contents • The source flow switch must be closed prior to either Alarm compressor starting and must remain closed for the •...
-
Page 24: Reference Calculations
5 SERIES 502W12 INSTALLATION MANUAL Reference Calculations Heating Calculations: Cooling Calculations: LWT = EWT - LWT = EWT + gpm x 500* gpm x 500* NOTE: * When using water. Use 485 for 15% methanol/water or Environol solution. Legend ABBREVIATIONS AND DEFINITIONS: = coefficient of performance (HC/kW x 3.413) -
Page 25: Operating Parameters
5 SERIES 502W12 INSTALLATION MANUAL Operating Parameters Heating Mode Entering Load Temp Entering Source Temp Suction Pressure Discharge Pressure Superheat Subcooling (°F) (°F) (psig) (psig) (°F) (°F) 10-20 60-75 8-10 6-10 20-30 65-80 9-11 8-12 30-40 70-85 10-14 10-14 40-50... -
Page 26: Thermistor Resistance
5 SERIES 502W12 INSTALLATION MANUAL Thermistor Resistance Compressor Resistance Model Start Winding Run Winding Thermistor Temperature Resistance in Ohms 1.33 ohms 0.38 ohms °F °C NOTE: Tolerance = +/- 7% 2/14/12 1035 1074 1113 1153 1195 1237 1279 1323 1368... -
Page 27: Heating/Cooling Cycle Analysis
5 SERIES 502W12 INSTALLATION MANUAL Heating Cycle Analysis ______PSI = ______SAT°F ______°F Braze Plate Suction Compressor Discharge ______°F Liquid Line ______PSI = ______SAT°F Braze Plate ______°F Unit Amp Draw ____________ Entering Source Water ________°F Line Voltage _________ Entering Water Pressure Drop _____ PSI Loop:______ Open ______ Closed Leaving Source Water ________°F... -
Page 28: Startup And Troubleshooting Form
5 SERIES 502W12 INSTALLATION MANUAL Startup and Troubleshooting Form Company Name: _________________________________ Company Phone No: ______________________________ Technician Name: ________________________________ Date: __________________________________________ Model No: ______________________________________ Serial No:_______________________________________ Owner’s Name: __________________________________ Open or Closed Loop: _____________________________ Installation Address: ______________________________ Installation Date: _________________________________... -
Page 29: Troubleshooting
5 SERIES 502W12 INSTALLATION MANUAL Troubleshooting Should a major problem develop, refer to the following The internal winding of the compressor motor may information for possible causes and corrective steps. be grounded to the compressor shell. If so, replace the compressor. -
Page 30: Service Parts List
5 SERIES 502W12 INSTALLATION MANUAL Service Parts List Part Description NHW084 Compressor 34P632-01 Compressor Sound Jacket 92P504A05 Thermal Expansion Valve 33P618-01 TXVs per circuit Filter Drier 36P500B02 Reversing Valve with Coil 33P526-05 Brazed Plate Heat Exchanger 62P581-01 Heat Exchanger Support Bracket... -
Page 31: Revision Guide
5 SERIES 502W12 INSTALLATION MANUAL Revision Guide Pages: Description: Date: Updated Field Wiring and Control Setup 25 Feb 2013 Updated Sequence of Operation 25 Feb 2013 Added Revision Guide 25 Feb 2013... - Page 32 Manufactured by WaterFurnace International, Inc. 9000 Conservation Way Fort Wayne, IN 46809 www.waterfurnace.com Product: 5 Series 502W12 Type: High Temp Hydronic Geothermal Heat Pump Size: 7 Ton Document: Installation Manual ©2013 WaterFurnace International, Inc., 9000 Conservation Way, Fort Wayne, IN 46809-9794. WaterFurnace has a policy...