Gree GRS-Cm18PdRe/NhA-M Owner's Manual
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Gree GRS-Cm18PdRe/NhA-M Owner's Manual

Gree GRS-Cm18PdRe/NhA-M Owner's Manual

Air-to-water heat pump
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Owner's Manual
Original Instructions
Air-to-water Heat Pump
Model：
GRS-Cm18PdRe/NhA-M

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Summary of Contents for Gree GRS-Cm18PdRe/NhA-M

  • Page 1 Owner's Manual Original Instructions Air-to-water Heat Pump Model： GRS-Cm18PdRe/NhA-M...
  • Page 2 (6) The final right to interpret for this instruction manual belongs to Gree Electric Appliances Inc. of Zhuhai.

  • Page 3: Table Of Contents

    Contents 1 Safety Notices (Please be sure to abide) ..............1 2 Diagram of the Operating Principle ................8 3 Operating Principle of the Unit ..................9 4 Nomenclature ........................ 10 5 Installation Example ..................... 10 6 Appearance ........................11 7 Installation Guideline of Monobloc Unit ..............

  • Page 4: Safety Notices (Please Be Sure To Abide)

    Air-to-water Heat Pump 1 Safety Notices (Please be sure to abide) WARNING : If not abide strictly, it may cause severe damage to the unit or the people. NOTE: If not abide strictly, it may cause slight or medium damage to the unit or the people. This sign indicates that the operation must be prohibited.
  • Page 5 Air-to-water Heat Pump WARNING Once abnormality likeburning Don't operate the unit with wet Before installation, please see smell occurs, please cut off the hand. if the voltage of local place power supply immediately and accords with that then contact with service nameplate of unit and capacity center.
  • Page 6 Air-to-water Heat Pump WARNING Earthing: the unit must be Never insert foreign Don't attempt to repair the unit earthed reliably! The earthing matter into outdoor unit to by yourself. wire should connect with avoid damage. And never special device of buildings. insert your hands into the air outlet of outdoor unit.
  • Page 7 Air-to-water Heat Pump WARNING Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. Should repair be necessary, contact your nearest authorized service center. Any repairs carried out by unqualified personnel may be dangerous. The appliance shall be stored in a room without continuous operating ignition sources.
  • Page 8 Air-to-water Heat Pump NOTE ozonosphere. The influence upon the greenhouse effect is also lower. R32 has got very good thermodynamic features which lead to a really high energy efficiency. The units therefore need a less filling. Before installation, please check if the adopted power is accordance with that listed on nameplate, and check the safety of power.
  • Page 9 Air-to-water Heat Pump Maximum and minimum water operating pressures Maximum water operating Item Minimum water operating pressures pressures Cooling Heating 0.05MPa 0.25MPa Hot water Maximum and minimum entering water pressures. Maximum entering water Item Minimum entering water pressures pressures Cooling Heating 0.05MPa 0.25MPa...
  • Page 10 Air-to-water Heat Pump NOTE inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised.

  • Page 11: Diagram Of The Operating Principle

    Air-to-water Heat Pump 2 Diagram of the Operating Principle NOTE: In actual engineering, terminals heating/cooling device are selected by the user.

  • Page 12: Operating Principle Of The Unit

    Air-to-water Heat Pump 3 Operating Principle of the Unit The DC inverter air source heat pump system comprises the ODU, water tank, and user terminals. Operation functions: (1) Hot water; (2) Heating; (3) Cooling; (4) Hot water+ Heating; (5) Heating+ water heating; (6) Mute function;...

  • Page 13: Nomenclature

    Refer to QJ/GD23.00.004 Model Line-Up Capacity Model Name Power supply Heating1, kW Heating2, kW GRS-Cm18PdRe/NhA-M 18.1 16.1 380-415V 3N~ 50Hz NOTES: (1) 1Capacities and power inputs are based on the following conditions: Indoor Water Temperature 30°C/35°C, Outdoor Air Temperature 7°C DB/6°C WB (2) 2Capacities and power inputs are based on the following conditions: Indoor Water Temperature 23°C/18°C, Outdoor Air Temperature 35°C DB/24°C WB...

  • Page 14: Appearance

    (ON): Live signal (Heating/Cooling system) from the main board to the 3-way valve.  (OFF): Live signal (Water tank loop) from the main board to the 3-way valve.  (N): Neutral signal from the main board to the 3-way valve.  6 Appearance GRS-Cm18PdRe/NhA-M...

  • Page 15: Installation Guideline Of Monobloc Unit

    (4) Install at a well-ventilated place, so that the machine can absorb and discharge sufficient air. (5) Do not install at a place where flammable or explosive goods exist or a place subject to severe dust, salty fog and polluted air. 7.2.2 Outline dimension of monobloc unit GRS-Cm18PdRe/NhA-M Unit: mm...
  • Page 16 Air-to-water Heat Pump 7.2.3 Space requirements for installation Unit: mm NOTE: In confederation of space restriction, for the left-handed figure, except the outlet side, distance between the unit and the nearest barrier at other three sides are allowed to be no less than 500mm; for the right-handed figure, distance between the inlet side and the nearest barrier is allowed to be no less than 500mm.
  • Page 17 Air-to-water Heat Pump 7.2.6 Safety operation of flammable refrigerant (1) Qualification requirement for installation and maintenance man7 Installation of Hydraulic Unit All the work men who are engaging in the refrigeration system should bear the valid certification awarded by the authoritative organization and the qualification for dealing with the refrigeration system recognized by this industry.

  • Page 18: Optional Electric Heater

    Air-to-water Heat Pump (5) Filling the refrigerant Use the refrigerant filling appliances specialized for R32. Make sure that different kinds of refrigerant won’t contaminate with each other. The refrigerant tank should be kept upright at the time of filling refrigerant. Stick the label on the system after filling is finished (or haven’t finished).
  • Page 19 Air-to-water Heat Pump NOTES: (1) Discharge is allowed unless the unit has been stopped. (Cut off the power and repower it 1 minutes later) (2) Protective measures should be taken during discharging to avoid frost bites. (3) When discharging is finished, if vacuuming cannot be done immediately, remove the hose to avoid air or foreign matters entering the unit.

  • Page 20: Installation Of Insulated Water Tank

    Air-to-water Heat Pump NOTE: When vacuuming is finished, pressure inside the unit should be kept lower than 80Pa for at least 30 minutes to make sure there is no leak. Either charging valve 1 or charging valve 2 can be used for vacuuming.

  • Page 21: Model Selection Of Water Pump

    Model Circulating water resistance(kPa) Circulating water resistance(m) GRS-Cm18PdRe/NhA-M NOTICE: The required water pump parameter is the rated value, not the max .value, when selecting model for water pump, please pay attention to the nominal flow and lift of water pump on the nameplate.

  • Page 22: Installation Measure

    Air-to-water Heat Pump 10.3 Installation measure Standing water tank must be installed vertically with the bottom on the ground, never suspended. Installation place must be firm enough and the water tank should be fixed on the wall with bolts to avoid vibration, as shown in the following figure.

  • Page 23: Connection Of Waterway System

    Air-to-water Heat Pump (5) The appliance is intended to be permanently connected to the water mains and not connected by a hose-set. (6) The type of the pressure-relief device is A3J, and this device shall be installed with threaded connection. (7) The replenishing water pressure in water tank shall be beyond 0.2MPa and below 0.7MPa.

  • Page 24: Requirements On Water Quality

    Power Wire Model V, Ph, Hz GRS-Cm18PdRe/NhA-M 380-415V 3N~ 50Hz NOTES: Leakage Switch is necessary for additional installation. If circuit breakers with leakage protection are in use, action response time must be less than 0.1 second, leakage circuit must be 30mA.

  • Page 25: Wring Diagram

    (7) The specifications of the breaker listed in the table above are applied to the breaker with the working temperature at 40℃. If the working condition changes, they should be modified according to the related national standard. 11 Wring Diagram 11.1 Control Board GRS-Cm18PdRe/NhA-M...

  • Page 26: Electric Wiring

    Air-to-water Heat Pump 11.2 Electric Wiring 11.2.1 Wiring principle Refer to Section 9.6. 11.2.2 Electric wiring The wiring diagram stuck to the unit always prevails.

  • Page 27: Commissioning

    Air-to-water Heat Pump GRS-Cm18PdRe/NhA-M 12 Commissioning 12.1 Check before startup For safety of users and unit, the unit must be started up for check before debugging. The procedures are as below: The following items shall be performed by qualified repair persons.

  • Page 28: Test Run

    Air-to-water Heat Pump Pre-check √ Is the water tank installed stably and are supports secure when the water tank is full? □ Is heat insulating measures for the water tank, outlet/inlet pipes and water replenishing pipe proper? □ Are the nilometer of water tank, water temperature indicator, controller, manometer, pressure relief valve □...

  • Page 29: Daily Operation And Maintenance

    Air-to-water Heat Pump The following procedure should be executed by experience and qualified maintenance men. Start up the pretest procedure Check whether the phase sequence of the main power supply is correct. If not, correct the phase sequence firstly. Recheck the phase sequence before start-up to avoid reverse rotation of the compressor which may damage the unit. Apply the universal electric meter to measure the insulation resistance between each outdoor phase and earth as well as between phases.

  • Page 30: Recovery

    Therefore, once the water tank has been installed, the water tank must be set to “With”, otherwise GREE will not be responsible for this abnormal operation.

  • Page 31: Decommissioning

    Air-to-water Heat Pump The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition.

  • Page 32: Notice Before Seasonal Use

    Air-to-water Heat Pump 13.3 Safety consideration Checking for presence of refrigerant The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially toxic or flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e.

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