Gree GRS-1.5/D150ANbA-K, Service Manual

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GREE AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
59
3.2 Disassembly of Key Components
3.2.1 Disassembly of Key Components of the Outdoor Unit
(1) Disassembly of Compressor
Disassembly of Compressor
Procedure Description
1. Remove the power cable of
the compressor.
● Unscrew the power cable using a screwdriver.
● Remove the power cable.
Note: When removing the power cable, make marks for cable color and
the corresponding terminal to avoid incorrect connection when the cable
is connected again.
2. Unscrew the compressor.
● Unscrew the compressor using a screwdriver. Remove the pad first if
the compressor is equipped with a pad.
3. Remove the air intake and
air exhaust pipes.
● Heat up the air intake and air exhaust pipes with the fired heater before
removing them.
● Nitrogen must be charged for protection during welding. Nitrogen
pressure: 0.5±0.1 kgf/cm
2
(relative pressure)
Note: Surrounding materials must be protected against being burnt by
high temperature during heat up.
4. Remove the compressor.
● Remove the fixed bolts at bottom corners of the compressor using the
spanner.
● Remove the compressor from the supporting structure.
Note: The compressor must be handled horizontally or vertically without
inversion.
5. Place the repaired or new
compressor on the supporting
structure.
● Place the repaired or new compressor on the supporting structure in the
same direction as that before removal.
● Screw on the fixed bolts at bottom corners of the compressor using the
spanner.
Note: The compressor must be handled horizontally or vertically without
inversion.
6. Install fixed bolts for the
compressor.
● Screw on the fixed bolts at bottom corners of the compressor using the
spanner.
7. Connect the air intake and
air exhaust pipes.
● Connect the air intake and air exhaust pipes to the system by welding
after heating them with the fired heater.
● Nitrogen must be charged for protection during welding. Nitrogen
pressure: 0.5±0.1 kgf/cm
2
(relative pressure)
Note: Surrounding materials must be protected against being burnt by
high temperature during heat up.
8. Install the power cable of
the compressor.
● Install the power cable to the fixed bolt in the sequence as that for
disassembly.
● Screw on the fixed bolts of the power cable using a screwdriver.
9. Vacuumize and keep
pressure for the system to
ensure tightness.
● Connect the pump to vacuumize the system, then keep pressure for the
system to ensure leak or not.
10. Re-perfuse refrigerant.
● Connect the perfusion nozzle (arrowed) on the air return pipe of the
compressor to the refrigerant.
● Perfuse refrigerant to the system.
Note: Refrigerant must be perfused based on the unit standard as the
refrigerant volume has great effect on cooling performance of the unit.
Note: Before disassembling the compressor, ensure that there is no refrigerant in the pipeline system and
power is cut off.