Check Before Commissioning - Gree A Series Service Manual

A Series Modular-type Air-cooled (Heat Pump) Chiller
6.3.3

Check before Commissioning

6.3.3.1 Completeness Check to the Main Unit
Is the surface of the unit in good condition?
Is there leak at any pipe connector?
Is any part damaged?
6.3.3.2 Check to Installation of the Unit
Does the installation location, installation foundation and maintenance space comply with
corresponding requirements?
6.3.3.3 Check to the Water System
(1)Is the water flow direction in the condenser and evaporator correct?
(2)Are the chilled water pipes clean? Is there any foreign matter trapped in the joints? Is the
water quality satisfactory?
(3)Is the insulation of the chilled water pipes in good condition?
(4)Are the manometer and thermometer connected correctly (Is the manometer at a right an-
gle with the water pipe, and is the thermometer's probe inserted into the water pump)? Do
the initial values of the manometer and thermometer comply with requirements before
commissioning?
(5)Is the leaving water flow switch installed correctly? Is this flow switch correctly wired to
the electric control cabinet?
(6)Start the chilled water pump through the contactor and see: does the chilled water pump
run in the correct direction (-clockwise)? If not, check the wiring of the water pump.
(7)Run the chilled water pump and see: is the water pressure stable? do the reading values
of water pressure change slightly? Is the running ampere in the rated range? If not, figure
out and eliminate the causes.
(8)Does the water makeup device of the expansion water tank work well? Does the auto-
matic exhaust valve work well? For the hand exhaust valve, open it to exhaust air inside
the system.
6.3.3.4 Check to Work Load
(1)Are the air handling units connected correctly?
(2)Do all diffusers work smoothly?
(3)Are the tightness and insulation of the conditioned space in good condition?
(4)Does the required load match with the capacity of the unit?
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