WFI EKW FX10 Installation Manual
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WFI EKW FX10 Installation Manual

Hydronic heat pumps
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FX10 50 hz hydronic heat PumPs
• R-410A RefRigeRAnt
• 6 thRu 17 kW
Installation Information
Water Piping Connections
Electrical
Startup Procedures
Troubleshooting
Preventive Maintenance
GIMEKWFX-E November 2008

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Summary of Contents for WFI EKW FX10

  • Page 1 FX10 50 hz hydronic heat PumPs • R-410A RefRigeRAnt • 6 thRu 17 kW Installation Information Water Piping Connections Electrical Startup Procedures Troubleshooting Preventive Maintenance GIMEKWFX-E November 2008...
  • Page 2 EKW FX10 INSTALLATION MANUAL Model Nomenclature EKW Series R-410A Hydronic Heat Pump (06 - 17 kW) 10-11 Family Vintage EKW = E Series 50 hz B = Current Hydronic Heat Pump Non-Standard Options Unit Capacity S = Standard 06 kW...

  • Page 3: Table Of Contents

    EKW FX10 INSTALLATION MANUAL Table of Contents 3.19. Low Pressure Switch (BI-3) ........19 General Installation Information..........4 3.20. Source Side Low Water Coil Accessories & Other Options ..........5 Temperature Limit Select (BI-4)........19 Potable Water Systems ............6-7 3.21. Source Side Low Water Coil Temperature Open Loop Systems ..............8...

  • Page 4: General Installation Information

    EKW FX10 INSTALLATION MANUAL General Installation Information Safety Considerations Before performing service or maintenance operations on the system, disconnect all WARning: power sources to unit. electrical shock could cause personal injury. Before applying power to the unit, make sure that all panels and screws are in place. Failure to do so could cause risk of electri- cal shock.

  • Page 5: Accessories & Other Options

    EKW FX10 INSTALLATION MANUAL Accessories and Other Options Desuperheater (Factory Installed, EKW08 to EKW17 only) An optional heat reclaiming desuperheater coil constructed of vented double-wall copper construction suitable for potable water is available. The coil is factory mounted inside the unit.

  • Page 6: Potable Water Systems

    EKW FX10 INSTALLATION MANUAL Potable Water Systems The EKW06 heating only model is designed to provide primary hot water generation. An optional factory-installed desuperheater coil may be provided with an EKW08, 12 or 17 to assist in the generation of domestic hot water.
  • Page 7 EKW FX10 INSTALLATION MANUAL Potable Water Systems Figure 5: Alternate Hot Water Installation EXPAN SION TANK IF REQUIRED COLD WATER OUT WATER IN FLOW CENTER P & T RELIEF TO FLOOR DRAIN DIP TUBE SOURCE LOAD BOILER DRAIN PT PORTS...

  • Page 8: Open Loop Systems

    EKW FX10 INSTALLATION MANUAL Open Loop—Well Water Systems Always maintain water pressure in the heat exchanger by placing water control valves at the outlet of the unit. Use a closed bladder type expansion tank to minimize mineral deposits. Ensure proper water flow through the unit by checking pressure drop across the heat exchanger and comparing it to the figures in the capacity data tables in the specification catalog.

  • Page 9: Earth Coupled Systems

    EKW FX10 INSTALLATION MANUAL Earth-Coupled Systems with Flow Center Once piping is completed between the unit, flow center and the earth loop, final purging and charging of the loop is needed. A flush cart (at least a 1.5 HP or 1.12 kW pump) is needed to achieve adequate flow velocity in the loop to purge air and dirt particles from the loop itself.

  • Page 10: Electrical

    EKW FX10 INSTALLATION MANUAL Electrical Compressor Unit Rated Voltage Total Unit Min Ckt Model Voltage Min/Max Fuse Ckt Brk 220-240/50/1 198/264 10.9 58.0 10.9 13.6 EKW06 380-420/50/3 342/462 26.0 220-240/50/1 198/264 15.4 82.0 15.4 19.3 EKW08 380-420/50/3 342/462 35.0 220-240/50/1 198/264 21.1...

  • Page 11: Dimensional Data, Physical Elements, Sound Data

    EKW FX10 INSTALLATION MANUAL DIMENSIONAL DATA Load Load Source Source Unit Desuperheater Desuperheater Liquid Liquid Liquid Liquid Model in [mm] in [mm] in [mm] In FPT in Out FPT in in FPT in out FPT in out FPT in in FPT in EKW06 25.5 [648]...

  • Page 12: Electrical

    EKW FX10 INSTALLATION MANUAL Electrical Be sure the available power is the same voltage and phase as that shown on the unit serial plate. Line and low voltage wiring must be done in accordance with local codes or the National Electric Code, whichever is applicable. Refer to the Unit Electrical Data on page 10 for wire and fuse or circuit breaker sizing information.

  • Page 13: Small Ekw Setup/Operation

    EKW FX10 INSTALLATION MANUAL Small EKW Setup/Operation features: • Single compressor • Reversible • Setpoint or aquastat operation • Single or duplexed load operation • Stage-able in setpoint mode • Extra(unused) IO is made available for optional use. • Fault detection and compressor shutdown •...
  • Page 14 EKW FX10 INSTALLATION MANUAL Fault alarms the following alarms may be seen on the Medium user interface (Mui): • Load Flow [The flow switch on the load side is open concurrent with a compressor call] • Low Press [Low Suction Pressure Alarm] • Src Lo Temp [Formerly Src Freeze alarm] •...

  • Page 15: Application Overview

    EKW FX10 INSTALLATION MANUAL 1. application overview The application is created for an FX10 Universal Controller with no expansion board. The application is designed to operate WaterFurnace E Series water–water heat pumps in either of three modes: Aqua-stat, S-Plan, or Setpoint.

  • Page 16: Sequence Of Operation

    EKW FX10 INSTALLATION MANUAL 3. Sequence of Operation 3.1. Power Fail restart When the controller is first powered up, the outputs will be disabled for a random start delay time (See Section 3.2). The delay is provided to prevent simultaneous starting of multiple heat pumps. Once the timer expires, the controller will operate normally.

  • Page 17: Cooling Cycle

    EKW FX10 INSTALLATION MANUAL 3.7.2. S-Plan Mode This mode allows externally selectable separate operation of domestic hot water or comfort conditioning. If only the Y1/System Enable input (BI-7) is enabled, the heat pump will only operate for the domestic hot water load. If the S-Plan Select Enable/POI (BI-10) is enabled and the Y1/System Enable input (BI-7) is not enabled, the reversing valve will be positioned for heating and the heat pump will only operate for the comfort heating.

  • Page 18: Emergency Shutdown

    EKW FX10 INSTALLATION MANUAL 3.8.2. S-Plan Mode This mode allows externally selectable separate operation of domestic hot water or comfort conditioning. If only the Y1/System Enable input (BI-7) is enabled, the heat pump will not enter cooling mode. If the S-Plan Select Enable (BI-10) is enabled and the Y1/System Enable input (BI-7) is not enabled, the reversing valve will be positioned for cooling.

  • Page 19: Entering Source Water Temp (Ai-3)

    EKW FX10 INSTALLATION MANUAL 3.12. Leaving Load Water temperature (Ai-2) The leaving load water temperature sensor will measure the leaving water temperature on the load side of the heat pump. A field selectable option is available to select compressor operation in response to the leaving load water temperature and setpoint relationship.

  • Page 20: Y1/System Enable Command (Bi-7)

    EKW FX10 INSTALLATION MANUAL 3.22. Spare (Bi-6) This input is mapped to the network variable nvoBI-6 to allow network status monitoring of additional devices. 3.23. Y1/System enable Command (Bi-7) 3.23.1. Aqua-stat Mode The Y1/System Enable command input shall be used to wire a 24 VAC “Y1” input from an aqua-stat and will control the operation of the compressor output (BO-2).

  • Page 21: Load Flow Proving Switch (Bi-12)

    EKW FX10 INSTALLATION MANUAL 3.28. Load flow Proving Switch (Bi-12) The load flow proving switch shall be a normally open flow switch that will close when the water flow through the load side heat exchanger reaches an acceptable level. The load flow proving switch must be closed 15 seconds prior to enabling the compressor output (BO-2).

  • Page 22: Accessory Output 1/Source Pump Control (Bo-7)

    EKW FX10 INSTALLATION MANUAL 4.8. Accessory Output 2/Load Pump Control (BO-8) Accessory Output 2 will be energized 60 seconds prior to the compressor output (BO-2) being energized. This period is adjustable via the Medium User Interface and by the facility management system. When the compressor output (BO-2) is turned off accessory output 2 will be continue to operate for a period that is also adjustable via the Medium User Interface and by the facility management system.

  • Page 23: Unit Startup

    EKW FX10 INSTALLATION MANUAL Unit Startup Before Powering Unit Check the following: • High voltage wiring is correct and matches the nameplate. • Fuses, breakers and wire size are correct. • Piping is completed and water system has been cleaned and flushed.

  • Page 24: Ari/Iso/Bs En Ratings

    EKW FX10 INSTALLATION MANUAL ARI/ISO/BS EN Ratings ARi/iSO 13256-2 english (iP) units Ground Loop Heat Pump Cooling Heating Load Liquid Source Liquid Unit Model Flow (gpm) Flow (gpm) ELT 50°F EST 80°F ELT 104°F EST 32°F Capacity Btuh EER Btuh/W Capacity Btuh...

  • Page 25: Capacity Data

    EKW FX10 INSTALLATION MANUAL Capacity Data heating Capacity Data EKW06 Load Flow Source Flow - .19 L/s Source Flow - .38 L/s Source Flow - .57 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 8.27 22.4...
  • Page 26 EKW FX10 INSTALLATION MANUAL Capacity Data heating Capacity Data continued... EKW06 Load Flow Source Flow - .19 L/s Source Flow - .38 L/s Source Flow - .57 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 6.89...
  • Page 27 EKW FX10 INSTALLATION MANUAL Capacity Data Cooling Capacity Data EKW06 Load Flow Source Flow - .19 L/s Source Flow - .38 L/s Source Flow - .57 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.19 10.34...
  • Page 28 EKW FX10 INSTALLATION MANUAL Capacity Data Cooling Capacity Data continued... EKW06 Load Flow Source Flow - .19 L/s Source Flow - .38 L/s Source Flow - .57 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.19...
  • Page 29 EKW FX10 INSTALLATION MANUAL Capacity Data heating Capacity Data EKW08 Load Flow Source Flow - .25 L/s Source Flow - .50 L/s Source Flow - .76 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.25 4.82...
  • Page 30 EKW FX10 INSTALLATION MANUAL Capacity Data heating Capacity Data continued... EKW08 Load Flow Source Flow - .25 L/s Source Flow - .50 L/s Source Flow - .76 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.25...
  • Page 31 EKW FX10 INSTALLATION MANUAL Capacity Data Cooling Capacity Data EKW08 Load Flow Source Flow - .25 L/s Source Flow - .50 L/s Source Flow - .76 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 10.0 0.50...
  • Page 32 EKW FX10 INSTALLATION MANUAL Capacity Data Cooling Capacity Data continued... EKW08 Load Flow Source Flow - .25 L/s Source Flow - .50 L/s Source Flow - .76 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.25...
  • Page 33 EKW FX10 INSTALLATION MANUAL Capacity Data heating Capacity Data EKW12 Load Flow Source Flow - .35 L/s Source Flow - .69 L/s Source Flow - 1.04 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.35 4.83...
  • Page 34 EKW FX10 INSTALLATION MANUAL Capacity Data heating Capacity Data continued..EKW12 Load Flow Source Flow - .35 L/s Source Flow - .69 L/s Source Flow - 1.04 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.35...
  • Page 35 EKW FX10 INSTALLATION MANUAL Capacity Data Cooling Capacity Data EKW12 Load Source Flow - .35 L/s Source Flow - .69 L/s Source Flow - 1.04 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 10.0 0.69 20.70...
  • Page 36 EKW FX10 INSTALLATION MANUAL Capacity Data Cooling Capacity Data continued... EKW12 Load Source Flow - .35 L/s Source Flow - .69 L/s Source Flow - 1.04 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.25 5.52...
  • Page 37 EKW FX10 INSTALLATION MANUAL Capacity Data heating Capacity Data EKW17 Load Flow Source Flow - .4 L/s Source Flow - .9 L/s Source Flow - 1.3 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 10.0 0.88...
  • Page 38 EKW FX10 INSTALLATION MANUAL Capacity Data heating Capacity Data continued... EKW17 Load Flow Source Flow - .4 L/s Source Flow - .9 L/s Source Flow - 1.3 L/s Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.44...
  • Page 39 EKW FX10 INSTALLATION MANUAL Capacity Data Cooling Capacity Data EKW17 Load Source Flow - .4 L/s Source Flow - .9 L/s Source Flow - 1.3 L/s Source Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 10.0 0.88...
  • Page 40 EKW FX10 INSTALLATION MANUAL Capacity Data Cooling Capacity Data continued... EKW17 Load Source Flow - .4 L/s Source Flow - .9 L/s Source Flow - 1.3 L/s Source Flow Power Power Power ºC ºC ºC ºC ºC ºC ºC ºC 0.44...

  • Page 41: Source Flow Rates (L/S)

    EKW FX10 INSTALLATION MANUAL Source Flow Rates (L/s) minimum minimum maximum model open Loop Flow rate closed Loop Flow rate Flow 0.188 0.377 0.754 ekW06 0.251 0.503 1.006 ekW08 0.346 0.691 1.382 ekW12 0.440 0.880 1.760 ekW17 Pressure Drop (kPa)

  • Page 42: Troubleshooting

    EKW FX10 INSTALLATION MANUAL Troubleshooting Should a major problem develop, refer to the following information for possible causes and corrective steps: Compressor Won’t Run: The fuse may be blown or the circuit breaker is open. Check electrical circuits and motor windings for shorts or grounds.

  • Page 43: Preventive Maintenance

    EKW FX10 INSTALLATION MANUAL Preventive Maintenance Keep all air out of the water lines. 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.

  • Page 44: Disposal/Recycling Section

    EKW FX10 INSTALLATION MANUAL Disposal/Recycling Section WaterFurnace International is dedicated to protecting the environment by manufacturing high-efficiency, low-impact products and implementing green practices companywide. As a part of this initiative, WaterFurnace encourages contractors to dispose/recycle all products that have reached the end of their useful life in an environmentally responsible manner.
  • Page 45 Product: EKW FX10 Series Type: Hydronic Heat Pumps Size: 6 thru 17 kW WFI has a policy of continuous product research and development and reserves the right to change design Document Type: Installation Manual and specifications without notice. Part Number: GIMEKWFX-E ©2008 WFI.

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