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CENTRAL HEATING Chofu Commissioning Manual

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Chofu
Commissioning Guide

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Summary of Contents for CENTRAL HEATING Chofu

  • Page 1 Chofu Commissioning Guide...

  • Page 2: Table Of Contents

    Commissioning Guide This document must be read in association with the Chofu Installation Manual provided with the unit. It is essential the manual is read and followed to ensure the installation is as per manufacturer’s criteria. The purpose of this document is to assist with the commissioning of the heat pump parameters and the connection of third party controls.

  • Page 3: Pre-Commissioning

    Pre-Commissioning Pre-Commissioning Checks Prior to Filling with water A: Ensure the heat pump is installed in accordance with the installation manual. B: Ensure the power is isolated to the unit. C: Remove the side cover of the unit to expose the water pump, compressor and electrical enclosure. D: Check the pre-charge of the expansion vessel is set to 1 bar.

  • Page 4: Heat Pump Controller

    Heat Pump Controller (connection) The Chofu heat pump controller must be installed to manage the heat pump operation. The controller is not rated for outdoor use, installation indoors in a dry place is recommended; i.e. garage or service cupboard. Terminal #1 and #2.

  • Page 5: Room Thermostat Connection

    Room Thermostat Connection (remote contact) Connect room thermostat wiring to terminals #20, #21 via the normally open contacts of the room thermostat. The thermostat requires volt free contacts to open/close terminals #20, #21. If the thermostat features a switched live output for on/off, an external relay with volt free contacts will need to be used.

  • Page 6: Heat Pump Controller Settings

    Heat Pump Controller Settings The heat pump controller must be installed to manage and configure control parameters. For install level For Install parameters hold down the 3 buttons together for 3 seconds. The parameter number (4 digits) will be displayed, and the value of the parameter.

  • Page 7: System Configuration

    System Configuration The following is a list of common configurations that are typically used. If you require something specific to your installation please contact us for a tailored list of parameters. System A: Heat pump switched On/Off by room thermostat(s) Heating Only System B: Heat pump switched On/Off by room thermostat(s) Heating + DHW System C: Heat pump switched On/Off by room thermostat(s) Heating &...

  • Page 8: System B: Heat Pump Switched On/Off By Room Thermostat(S) + Dhw, Heating Only

    System B: Heat Pump Switched On/Off by Room Thermostat(s) Heating + DHW Value Parameter Description Default Set To Flow temperature set point for heating 2101 35 to 45 underfloor (depending on floor covering) description 60 – radiators 0 = DHW is unavailable 3101 1 = DHW is available, and priority DHW over space heating 3111...

  • Page 9: System C: Heat Pump Switched On/Off By Room Thermostat(S) Heating & Cooling

    System C: Heat Pump Switched On/Off by Room Thermostat(s) Heating & Cooling Value Parameter Description Default Set To Flow temperature set point for heating 2101 35 to 45 underfloor (depending on floor covering) description 60 – radiators Cooling, enable outgoing water set point* 2120 0 = Fixed set point 1 = Climatic curve enabled...

  • Page 10: System D: Heat Pump Switched On/Off By Room Thermostat(S) + Dhw, Heating & Cooling

    System C: Heat Pump Switched On/Off by Room Thermostat(s) Heating & Cooling continued Value Parameter Description Default Set To Maximum outgoing temperature hysteresis corresponding 4412 to 100% relative humidity*** Terminal 17-18: Humidity sensor 5117 0 = Disable 1 = Enable Terminal 20-21: On/Off remote contact or EHS Alarm input 0 = Disable (Remote controller only) 5120...
  • Page 11 System D: Heat Pump Switched On/Off by Room Thermostat(s) Heating & Cooling + DHW Value Parameter Description Default Set To Flow temperature set point for heating 2101 35 to 45 underfloor (depending on floor covering) description 60 – radiators Cooling, enable outgoing water set point* 2120 0 = Fixed set point 1 = Climatic curve enabled...
  • Page 12 System D: Heat Pump Switched On/Off by Room Thermostat(s) Heating & Cooling + DHW continued Value Parameter Description Default Set To Compensation of room humidity*** 4410 0 = Disable 1 = Enable Room relative humidity value to start increasing 4411 Outgoing water temperature set point*** Maximum outgoing temperature hysteresis corresponding 4412...

  • Page 13: System Operational Checks

    System Operational Checks Once the heat pump is set up, it is a very good idea to check that everything works as intended and that the heat pump starts and stops when it should in response to the controls used, and there is a good flow rate at the manifolds and radiators get hot.

  • Page 14: Resetting Errors

    The procedure to reset the error display differs between error codes and there are 3 ways to reset: Auto, Power Off, and Manual. See “List of Errors codes” in the Chofu installation manual for the procedure to reset each error code.
  • Page 15 Experts The combination of our skills, products, experience and people, make us New Zealand’s experts in the central heating industry. We take pride in supplying the right heating system or products for our customers’ specific functionality and budget requirements so that at the end of every project, both our customers and their clients are delighted—and warm.

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