WaterFurnace Versatec 300 Series Operation & Maintenance Manual
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WaterFurnace Versatec 300 Series Operation & Maintenance Manual

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OPERATION & MAINTENANCE
Versatec 300 (0.5-6 Ton)
60HZ
OMV3-0007W
All Versatec 300 Series models are safety listed under UL 60335-2-40 through ETL, and
performance listed with AHRI in accordance with ASHRAE/ANSI/AHRI/ISO Standard 13256-1.

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  • Page 1 OPERATION & MAINTENANCE Versatec 300 (0.5-6 Ton) 60HZ OMV3-0007W All Versatec 300 Series models are safety listed under UL 60335-2-40 through ETL, and performance listed with AHRI in accordance with ASHRAE/ANSI/AHRI/ISO Standard 13256-1.

  • Page 2: For The User

    Indicates a situation that could result in NOTICE equipment or property damage. WARNING: All WaterFurnace products are designed, tested, and manufactured to comply with the latest publicly released and available edition of UL 60335-2- 40 for electrical safety certification. All field electrical...

  • Page 3: Table Of Contents

    Table of Contents UNIT OVERVIEW Nomenclature ............... . .6 Physical Data .

  • Page 4: General Installation Information

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE General Installation Information NOTICE: Do not store or install units in corrosive environments No person carrying out work in relation to a REFRIGERATING or in locations subject to temperature or humidity extremes. SYSTEM which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of Corrosive conditions and high temperature or humidity can fire or explosion.

  • Page 5: Installation Space Requirements

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE General Installation Information Installation Space Requirements WARNING NOTE: Equipment with refrigerant charge less than 64 oz does Ventilated Area: ensure that the area is in the open or that it is adequately ventilated before breaking into the system of not require have a minimum floor area requirement and does not conducting any hot work.

  • Page 6: Nomenclature

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Nomenclature V3AV042BS0*N1CTLAANN010SSS 24-26 Brand Non-Standard Options V – WaterFurnace SSS – None Versatec Drain Pan Option Model 0 – Composite, No Secondary Connection 3 – 300 Series 1 – Composite, Secondary Connection 2 – Stainless Steel, No Secondary Connection Type 3 –...

  • Page 7: Physical Data

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Physical Data Single Speed Models Model Compressor (1 each) Rotary Scroll Factory Charge 26 [0.74] 22 [0.62] 24 [0.68] 28 [0.79] 30 [0.85] 30 [0.85] 32 [0.91] 46 [1.3] 48 [1.36] 52 [1.47] 62.8 [1.78] 62.8 [1.78] R454B, oz [kg] Vertical...

  • Page 8: Dimensional Data

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Dimensional Data - Vertical Standard filter rails for Field installed open return applications duct flange Deluxe filter rack for ductable return applications Air coil ACCESS PANEL 2' (61 cm) Alternate Service Access FRONT FRONT Top View - Right Return Top View - Left Return...
  • Page 9 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Dimensional Data Vertical cont. Electrical Knockouts Overall Cabinet Water Connections Vertical Models Loop 1/2" cond 1/2" cond 1" cond Filter Rack Width Depth Height* Condensate Water FPT Low Voltage Low Voltage Power Supply Width 19.2 19.2...
  • Page 10 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Dimensional Data Horizontal Standard filter rails Standard filter rails 1 in knockout Left Return 1/2 in knockout Right Return Front Front Right Return Air Front View 2' (61 cm) 2' (61 cm) Service Access Service Access 1/2 in knockout Condensate...
  • Page 11 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Dimensional Data Horizontal cont. Water Connections Electrical Knockouts Overall Cabinet Horizontal Loop Models 1/2" cond 1" cond Width Depth Height* Condensate Water FPT Low Voltage Power Supply 19.2 35.0 12.9 1/2" 006-012 48.8 88.9 32.8 12.2...

  • Page 12: Hanger Bracket Locations

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Hanger Bracket Locations Right Left Compressor Section Air Handler Section Air Handler Section Compressor Section 3/8” Vibration Isolator Threaded Rod (not supplied) Washer Hex Nuts (not supplied) Bolt and Lockwasher Weight Distribution Table Hanger Bracket Locations Hanger Kit Part Horizontal Weight Distribution...

  • Page 13: Electrical Data

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Electrical Data Variable Speed ECM Single Speed Models Voltage ● ● ● ● ● ● ● ● ● ● ● ● 208-230/60/1 ● ● ● ● ● ● ● ● 265/60/1 ● ● ●...
  • Page 14 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Electrical Data cont. Variable Speed ECM Motor Blower Total Compressor Rated Voltage Model Motor Unit Circ Fuse/ Voltage Min/Max HACR Breaker 208-230/60/1 187/253 27.0 10/15 265/60/1 238/292 22.0 10/15 208-230/60/1 187/253 27.0 10/15 265/60/1 238/292 32.0...
  • Page 15 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Electrical Data cont. 5 Speed ECM Motor Blower Total Compressor Motor Unit Circ Fuse/ Model Rated Voltage Voltage Min/Max HACR Breaker 208-230/60/1 187/253 10.8 33.0 11.8 13.7 265/60/1 238/292 37.0 10.3 12.0 208-230/60/1 187/253 14.3 10.2...
  • Page 16 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Electrical Data cont. Variable Speed ECM Motor Compressor Blower Total Rated Voltage Fuse/ Model Motor Unit Circ Voltage Min/Max HACR Breaker 115/60/1 104/127 29.0 208-230/60/1 187/253 15.0 10/15 115/60/1 104/127 12.5 50.0 11.8 208-230/60/1 187/253 21.0...

  • Page 17: Blower Performance Data

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Blower Performance Data Standard PSC Motor Blower Blower Motor Airflow (cfm) at External Static Pressure (in. wg) Model Size 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 1.00 6 x 8 1/10...
  • Page 18 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Blower Performance Data cont. 5- Speed ECM Motor Airfl ow (cfm) at External Static Pressure (in. wg) Motor Blower Motor Model Motor Spd Size 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70...
  • Page 19 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Blower Performance Data cont. Variable speed ECM blower motors have 12 selectable speeds and are factory set for optimum performance. When applicable, the speed settings may also be adjusted through the Building Automation System (BAS). CAUTION: Disconnect all power before performing this operation.
  • Page 20 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Blower Performance Data - 5 Speed ECM Constant Torque Motors The 5-speed ECM is a ‘Constant Torque’ ECM motor and Signal Connection - 1/4 in. quick connects - Common to C, delivers air flow similar to a PSC but operates as efficiently 24VAC to Taps #1-5.
  • Page 21 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Blower Performance Data cont. Setting Blower Speed - Variable Speed ECM Variable Speed ECM Setup with an AID Tool cont. Selecting YES will enter variable The ABC board’s Yellow Config LED will flash the current ECM SPEED INFO speed ECM speed setup, while variable speed ECM blower speed selections for low, med,...

  • Page 22: Antifreeze Corrections

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Antifreeze Corrections Catalog performance can be corrected for antifreeze use. Please use the following table and note the example given. Antifreeze Cooling Heating Antifreeze Type Pressure Drop % by wt Capacity Capacity EWT - degF [DegC] 90 [32.2] 30 [-1.1] 30 [-1.1]...

  • Page 23: Correction Factor Tables

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Correction Factor Tables Cooling Capacity Corrections Sensible Cooling Capacity Multipliers - Entering DB °F Entering Total Power Heat of Air WB °F Clg Cap Input Rejection 80.6 0.898 0.723 0.866 1.048 1.185 0.985 0.913 0.912 0.632...

  • Page 24: Water Quality

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Water Quality It is the responsibility of the system designer and installing Water Treatment contractor to ensure that acceptable water quality is present Do not use untreated or improperly treated water. Equipment and that all applicable codes have been met in these damage may occur.

  • Page 25: Operating Limits

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Operating Limits Cooling Heating Operating Limits (°F) (°C) (°F) (°C) Air Limits Min. Ambient Air Rated Ambient Air 26.7 21.1 Max. Ambient Air 37.8 29.4 Min. Entering Air 10.0 NOTE: Minimum/maximum limits are only for start-up conditions, and Rated Entering Air db/wb 80.6/66.2 27/19 20.0...

  • Page 26: Operating Parameters

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Operating Parameters Cooling Entering Water Water Flow Suction Discharge Water Temp Air Temp Drop Temp °F gpm/ton Superheat Subcooling Pressure psig Pressure psig Rise °F °F DB 100-115 170-190 17 - 26 10 - 14 18 - 22 18 - 22 95-110...

  • Page 27: Pressure Drop

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Pressure Drop Pressure Drop (psi) Pressure Model Valve Drop (psi) 30°F 50°F 70°F 90°F 110°F 0.09 10.1 0.16 1/2" 10.4 0.23 10.6 0.32 0.09 10.1 0.16 1/2" 10.4 0.23 10.6 0.32 0.09 10.2 0.19 3/4"...

  • Page 28: Aurora 'Base' Control

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System Aurora ‘Base’ Control Field Selectable Options via Hardware DIP Switch (SW1) – Test/Configuration Button (See SW1 Operation Table) Test Mode The control is placed in the test mode by holding the push button switch SW1 for 2 - 5 seconds.

  • Page 29: Safety Features

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Cycle with Blower - The accessory relay will cycle with Lockout – when locked out, the blower will operate the blower output. continuously in “G” speed, and PSC blower motor output will remain on.

  • Page 30: Operation Description

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Cooling Operation Over/Under Voltage Shutdown - An over/under voltage condition exists when the control voltage is outside the range In all cooling operations, the reversing valve directly tracks the of 18 VAC to 30 VAC.
  • Page 31 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Aurora ‘Base’ Control LED Displays Aurora Interface and Diagnostics (AID) Tool These three LEDs display the status, configuration, and The Aurora Interface fault codes for the control. These can also be read in plain and Diagnostics (AID) English via the Aurora AID Tool.
  • Page 32 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Aurora UPC Controller ZS Series Sensors The Aurora Unitary Protocol Converter (UPC) is designed to The Aurora UPC is implemented with the Aurora Base add-on to any Aurora based heat pump control. The Aurora Controller (ABC) heat pump control into our latest water Unitary Protocol Convertor (UPC) is designed to allow water source heat pumps.
  • Page 33 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Modbus BACnet Rnet Aurora UPC Features Aurora UPC Optional Features • Rugged enclosure made of GE C2950 Cycoloy plastic • AID Tool for Aurora ABC configuration • Built-in surge transient protection circuitry and troubleshooting.
  • Page 34 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Port 1a is used to communicate to the Building Automation System (BAS). This port’s settings are 24Vac configured through the onboard dip switches. Port 2 is used to Dip switches for communicate to configuring the the Aurora Base...
  • Page 35 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Leaving Air Temperature (LAT) Sensor – This 10 kOhm Dirty Filter Switch – This optional field installed switch NTC sensor is factory installed on all UPC equipped is connected to confirm dirty filter operation. The heat pumps.
  • Page 36 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Aurora Base or Advanced Control Configuration and Status Codes Status LED (LED3, Green) Description of Operation Fault LED, Green Normal Mode Control is Non-functional Test Mode Slow Flash Lockout Active Fast Flash Dehumidification Mode Flash Code 2...
  • Page 37 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Aurora Advanced Control Configuration and Options (Future Availability on Select Models/Configurations) Accessory Relay2 – A second, configurable, accessory relay on the AXB is provided that can be cycled with the compressor 1 or 2 , blower, or the Dehumidifier (DH) input.
  • Page 38 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. Performance Monitoring (optional sensor kit) - The Aurora Advanced Control Optional Sensor Kits optional Performance Monitoring Kit includes: three (Availability on Select Models/Configurations) temperature sensors, entering and leaving water, Energy Monitoring (Standard Sensor Kit on leaving air temperature and a water flow rate sensor.
  • Page 39 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. This is done using (2) 18 AWG twisted pair unshielded ZS Series RNet Sensor Overview cables for a total of 4 wires connected to the Rnet port. The ZS Series line of intelligent zone sensors provides the The sensor gets its power from the UPC controller and function and flexibility you need to manage the conditions connecting multiple sensors to one UPC will allow for space...
  • Page 40 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Aurora Control System cont. RNet Sensor Physical and Electrical Data Sensing Element Range Accuracy Temperature (on non-Humidity models) -4° to 122° F (-20° C to 50° C) ±0.35° F (0.2° C) Temperature (on Humidity models) 50°...

  • Page 41: Refrigerant Circuit Guideline

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Refrigerant Circuit Guideline Head Suction Compressor Air Temp. Water Temp. Symptom Superheat Subcooling Pressure Pressure Amp Draw Differential Differential Under Charged System (Possible Leak) High Over Charged System High High High Normal High Normal/Low Normal Low Air Flow Heating...

  • Page 42: System Cleaning And Flushing

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE System Cleaning and Flushing Refill the system with clean water. Test the system water Cleaning and Flushing for acidity and treat as required to leave the water slightly Prior to start up of any heat pump, the water circulating alkaline (pH 7.5 to 8.5).

  • Page 43: Open Loop Ground Water Systems

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Open Loop Ground Water Systems Typical open loop piping is shown below. Always maintain Discharge water from the unit is not contaminated in any water pressure in the heat exchanger by placing water manner and can be disposed of in various ways, depending control valves at the outlet of the unit to prevent mineral on local codes, i.e.

  • Page 44: Legend And Notes

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Reference Calculations Heating Calculations: Cooling Calculations: LWT = EWT - LWT = EWT + gpm x 500 gpm x 500 LAT = EAT + LAT(DB) = EAT(DB) - cfm x 1.08 cfm x 1.08 LC = TC - SC TH = HC + HWC S/T =...

  • Page 45: Compressor And Thermistor Resistance

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Compressor and Thermistor Resistance Compressor Resistance Chart 208-230/60/1 265/60/1 Model 208-230/60/3 460/60/3 Start Start 2.96 3.35 2.95 3.02 2.48 3.17 2.56 3.08 3.29 2.56 3.08 2.15 2.28 1.93 2.16 1.81 2.21 1.93 2.16  1.068 1.749 ...

  • Page 46: Heat Of Extraction/Rejection Data

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Heat of Extraction/Rejection Data Heat of Extraction/Rejection Model Heat Of Extraction (HE) Heat of Rejection (HR) 30°F 50°F 70°F 90°F 30°F 50°F 70°F 90°F 110°F 10.2 13.5 10.1 13.3 10.1 13.2 10.0 11.9 11.1 10.1 10.2...

  • Page 47: Control Board Troubleshooting Flow Charts

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE CONTROL BOARD FLOW CHARTS...

  • Page 48: Compressor Will Not Start

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts Use the following flow charts to aid in troubleshooting the control board. Compressor Will Not Start Without AID Tool Compressor will not start Count the number of Is LED3 (green) lit Is LED1 (red) flashes and compare to or flashing?
  • Page 49 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. Notes: 1. When measuring 24VAC actual value may be between 18 and 30VAC. Put control into test Check 24VAC Check 24VAC Check for correct Check Compressor mode, and wait 1 between CC and across contactor voltage on T1 and...
  • Page 50 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. Compressor Will Not Start With AID Tool Compressor will not start Check current fault. Connect the AID Is the control in Correct fault and try to Tool Lockout? restart.
  • Page 51 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. Notes: 1. When measuring 24VAC actual value may be between 18 and 30VAC. Check 24VAC Check 24VAC Check for correct Check Compressor In “System between CC and across contactor voltage on T1 and wiring, winding...
  • Page 52 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. ECM Blower Will Not Start Without AID Tool Blower will not start Check for correct voltage Remove P1 and place a Put control into test Is LED3 (green) Lit between orange and jumper between R and mode and wait 1...
  • Page 53 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. Notes: 1. When measuring 24VAC actual value may be between 18 and 30VAC. There is a problem Does the blower with the thermostat or start thermostat wiring Check 24VAC Is the DC voltage on P13-1 Is the low volt ECM...
  • Page 54 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. ECM Blower Will Not Start With AID Tool Blower will not start Check for correct voltage Connect AID Tool. Put control in test Is LED3 (green) Lit between orange and Remove P1 and put a mode and wait 1...
  • Page 55 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. Notes: 1. When measuring 24VAC actual value may be between 18 and 30VAC. Put control into test Check 24VAC Check 24VAC Check for correct Check Compressor mode, and wait 1 between CC and across contactor voltage on T1 and...
  • Page 56 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. Loop Pump Will Not Start Variable Speed Pump Loop Pump will not start Check pump wiring to Is AXB LED1 Is AXB LED1 AXB. Check (Green) Flashing flashing fast? communication wiring from ABC to AXB.
  • Page 57 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. Notes: 1. When measuring 24VAC actual value may be between 18 and 30VAC. 2. When measuring 240VAC actual value may be between 190 and 250 VAC. Check 240 VAC Did the loop pump Is voltage on VS PMP Check for 240 VAC...
  • Page 58 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. Loop Pump Will Not Start Non Variable Speed Pump Loop Pump will not start Check pump wiring to Is AXB LED1 Is AXB LED1 AXB. Check (Green) Flashing flashing fast? communication wiring from ABC to AXB.
  • Page 59 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Troubleshooting Flow Charts cont. Notes: 1. When measuring 24VAC actual value may be between 18 and 30VAC. 2. When measuring 240VAC actual value may be between 190 and 250 VAC. Check for 240 VAC Check 240 VAC Did the loop pump Check for 240 VAC...

  • Page 60: Communicating Thermostat Troubleshooting Guide

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Communicating Thermostat Troubleshooting Guide TPCC32U01*, TPCM32U03A* and TPCM32U04A* Thermostat not (*GSR, GSM, E, YRK) communicating Wire non- Are you using a communicating 8 Is this a variable communicating wire thermostat speed unit? thermostat? to P1 terminal on the ABC board Configure Aurora System Screen...
  • Page 61 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Communicating Thermostat Troubleshooting Guide cont. Are all Remove what is applicable not needed or add devices present what is needed. Is Issue resolved on Configure the thermostat Aurora System communicating? screen TPCM32U03A*/TPCM32U04A* Thermostat P7 on ABC Board Green Plug Is the thermostat...

  • Page 62: Control Board Signals

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Signals To Check for 24VAC between R and C a signal and the contactor is not pulled in, check voltage across the contactor coil. If you have voltage across the contractor coil, replace the contactor.
  • Page 63 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Signals cont. To Check Operation of the Accessory Relay Put gauges on the unit to monitor high/low pressure. Place a jumper between “R” and “CC” as shown. This will bypass the safety circuit and the compressor will run whether the board is calling for it or not.
  • Page 64 WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Control Board Signals cont. To Check the Condensate Sensor To Check the ECM Blower Motor Enable Signal 24 VAC VOLTS VOLTS OHMS With the AID Tool go to the “Thermostat Inputs” Menu under “Diagnostics”...

  • Page 65: Jumping The Control Board

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Jumping the Control Board Stage 1 Heating Stage 2 Heating With the AID Tool go to the “Thermostat Inputs” Menu under With the AID Tool go to the “Thermostat Inputs” Menu under “Diagnostics” and over-ride the “Y1” input to ON. If an AID Tool “Diagnostics”...

  • Page 66: Emergency Heat

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Jumping the Control Board cont. Emergency Heat Stage 1 Cooling With the AID Tool go to the “Thermostat Inputs” Menu under With the AID Tool go to the “Thermostat Inputs” Menu under “Diagnostics” and over-ride the “W” input to ON. If an AID Tool “Diagnostics”...

  • Page 67: Reheat Mode

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Jumping the Control Board cont. Reheat Mode With the AID Tool go to the “Thermostat Inputs” Menu under “Diagnostics” and over-ride the “DH” input to ON. If an AID Tool is not available remove the P1 connector to disconnect the thermostat from the board.

  • Page 68: Preventative Maintenance

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Preventative Maintenance Water Coil Maintenance 1. Keep all air out of the water. An open loop system should be checked to ensure that the well head is not allowing air to infiltrate the water line. Lines should always be airtight. 2.

  • Page 69: Troubleshooting

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Troubleshooting Should a major problem develop, refer to the following information for possible causes and corrective steps. If compressor won’t run: The fuse may be open or the circuit breaker is tripped. Check electrical circuits and motor windings for shorts or grounds.

  • Page 70: Troubleshooting Checklist

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Troubleshooting Checklist Company Name: _________________________________ Company Phone No: ______________________________ Technician Name: ________________________________ Date: __________________________________________ Model No: ______________________________________ Serial No:_______________________________________ Owner’s Name: __________________________________ Open or Closed Loop: _____________________________ Installation Address: ______________________________ Installation Date: _________________________________ Check One ❑...

  • Page 71: Startup/Troubleshooting Form

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE DEALER: PHONE #: DATE: PROBLEM: MODEL #: Startup/Troubleshooting Form SERIAL #: COOLING CYCLE ANALYSIS SAT °F °F Unit Amp Draw: Loop: Open Closed Line Voltage: °F °F COIL SUCTION COMPRESSOR REVERSING COAX COAX EXPANSION VALVE LOAD...

  • Page 72: Decommissioning

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Decommissioning Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refriger- ants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of recovered refrigerant.

  • Page 73: Refrigerant Recovery

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Refrigerant Recovery When removing refrigerant from a system, either for servicing The recovered refrigerant shall be processed according to or decommissioning, it is recommended good practice that all local legislation in the correct recovery cylinder, and the refrigerants are removed safely.

  • Page 74: Charging Procedures

    WATER SOURCE/GEOTHERMAL HEAT PUMP OPERATION AND MAINTENANCE Charging procedures In addition to conventional charging procedures, the following requirements shall be followed. • Ensure that contamination of different refrigerants does not occur when using charging equipment. • Hoses or lines shall be as short as possible to minimise the amount of refrigerant contained in them.

  • Page 75: Revision Guide

    Revision Guide Pages: Description: Date: 14 Feb 2024 Document Creation...
  • Page 76 Commercial 0.5-6 Ton Document: Operation & Maintenance OMV3-0007W 08/24 ©2024 WaterFurnace International, Inc., 9000 Conservation Way, Fort Wayne, IN 46809-9794. WaterFurnace has a policy of continual product research and development and reserves the right to change design and specifi cations without notice.

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