Part 2 Commissioning Process; Necessity Of Vrf Engineering Commissioning; Required Files And Tools For Engineering Debugging; Required Tools For Engineering Commissioning - Gree Ultra Heat GMV Multi VRF Heat Pump Series Service Manual

Ultra Heat GMV VRF Technical Service Manual

PART 2 COMMISSIONING PROCESS

NOTICE！
① It is forbidden to directly connect the compressor with power supply and forcibly power it on
during commissioning and maintenance.
② Engineering commissioning operations must be performed on the Ultra Heat GMV serial unit.
Otherwise, the unit cannot properly run.
③ Before commissioning is completed, the main board of ODU displays "A0" and that of IDU
displays ―A0‖.
④ A module must be set to master module and only one can be set during commissioning.
⑤ An IDU must be set to master IDU and only one can be set during commissioning for heat pump;
And for heat recovery VRF, there is no need to set master IDU.
⑥ Other functions can use the factory settings if there are not special engineering requirements.

1 NECESSITY OF VRF ENGINEERING COMMISSIONING

Different form ordinary air conditioning units, the VRF system raises high design requirements and
easily incurs operation-affected factors such as impurities and water during engineering installation. Due
to the requirements on engineering design/installation complexity and high-precise system control,
commissioning is mandatory after engineering installation. Only a qualified unit can be delivered for use.

2 REQUIRED FILES AND TOOLS FOR ENGINEERING DEBUGGING

2.1 Required Tools for Engineering Commissioning

Inner hexagon spanner
Shifting spanner
Cross screwdriver
Straight screwdriver
Electronic balance
System high and low pressure gauges for corresponding
Wind-speed transmitter
The Ultra Heat GMV provides two commissioning methods. One is to perform commissioning by
pressing buttons on the main board of ODU. The other is to perform commissioning on a PC through
professional software. Parameters of the ODU and IDU can be simultaneously displayed with the second
method. (For details about these methods, refer to respective instructions.)

2.2 Commissioning Files

The following commissioning files are required to record installation and commissioning of units:
pre-commissioning scheme determination meeting minutes, commissioning personnel record tables,
commissioning system appearance check record tables, commissioning data record tables, and
Vacuum pump
refrigerants
Digital thermometer
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COMMISSIONING OPERATION
Noise meter
Clamp meter
Digital multimeter
Electricity meter
Timer
Step ladder
...