31
A Series Inverter Modular Air-cooled Chiller (Heat Pump)
6.7 Jumpers
When it is required to replace the main board, be sure the main board can match with the applicable
jumpers.
Model Code Jumper no. Matched compressor
LSQWRF35VM/NhA-M 4202021913 QXFS-H80zN345H
LSQWRF60VM/NhA-M 4202021915 QXFS-H80zN345H
LSQWRF130VM/NhA-M 4202021916
16
QXFS-H80zN345K
7 Commissioning and maintenance
The unit shall be maintained periodically by the skilled servicemen from Gree or a designed
person under our professional guide to guarantee the unit operates reliably in a long term.
7.1 Check before startup
Please nish the following steps before staring the system.
(1) Before connecting to electricity, you need to make sure that the insulation resistance between the
wiring terminal and ground complies with the local codes and regulations and check if the motor
meets the insulation requirement with a resistance meter.
(2) Check if all connections are in good condition and clean.
(3) Close the main power switch.
(4) Check if the voltage between terminals keeps balance within deviation of 2%.
(5) Be sure the power supply line is capable of carrying the rated current on the nameplate.
(6) Be sure all valves of water and refrigerant pipeline are placed properly.
(7) Reset all hand reset control elements.
(8) Be sure all sensors are placed installed properly.
7.2 Requirements on water quality and cleaning
Be sure to open the water pump after the water system has been ushed times and the water quality
has met the requirements and meanwhile be sure the water flow rate and pressure are within the
allowable range.
The industrial water generates little scale when used as the refrigeration medium while the well or
river water will generate much more scale and sands which would reduce the ow rate of the evaporate
and cause freezing. Therefore, the well or river water must be firstly treated with the water softening
equipment and analyze the PH, heat conductivity, Cl ion, and S ion before use.
Be sure to open the water pump after the water system has been ushed times and the water quality
has met the requirements and meanwhile be sure the water flow rate and pressure are within the
allowable range.
The industrial water generates little scale when used as the refrigeration medium while the well or
river water will generate much more scale and sands which would reduce the ow rate of the evaporate
and cause freezing. Therefore, the well or river water must be firstly treated with the water softening
equipment and analyze the pH, Electrical conductivity, Cl ion, and S ion before use.
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