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SINCLAIR
Four-way valve
3.2 Disassembly of Key Components
3.2.1 Disassembly of Key Components of the Outdoor Unit
(1) Disassembly of Compressor
Procedure
1. Remove the power cord of the
compressor.
2. Unscrew the compressor.
3. Remove the gas suction and
gas discharge pipes.
4. Remove the compressor.
5. Place the repaired or new
compressor on the supporting
structure.
6. Install fixed bolts for the
compressor.
7. Connect the air intake and air
exhaust pipes.
8. Install the power cord of the
compressor.
9.
Vacuumize
and
pressure for the system to
ensure tightness.
10. Re-perfuse refrigerant.
NOTE: Before disassembling the compressor, ensure that there is no refrigerant in the pipeline system and power is cut
off.
AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
The four-way valve changes flow direction of refrigerant during
defrosting of the circular water heater. In the defrosting mode, the
compressed refrigerant enters the evaporator for heat exchange and
defrosting after its flow direction is changed by the four-way valve. Then
it flows into the tube heat changer through the expansion valve. After
that, it is sucked by the compressor to enter the next cycle.
Disassembly of Compressor
● Unscrew the power cord using a screwdriver.
● Remove the power cord.
Note: When removing the power cord, make marks for cable color and the
corresponding terminal to avoid incorrect connection when the cable is connected
again.
● Unscrew the compressor using a screwdriver. Remove the pad first if the
compressor is equipped with a pad.
● Heat up the gas suction and gas discharge pipes with the fired heater before
removing them.
● Nitrogen must be charged for protection during welding. Nitrogen pressure: 0.5±0.1
bar (gauge pressure)
Note: Surrounding materials must be protected against being burnt by high
temperature during heat up.
● 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.
● 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.
● Screw on the fixed bolts at bottom corners of the compressor using the spanner.
● 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
bar (gauge pressure)
Note: Surrounding materials must be protected against being burnt by high
temperature during heat up.
● Install the power cord to the fixed bolt in the sequence as that for disassembly.
● Screw on the fixed bolts of the power cord using a screwdriver.
keep
● 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.
Description
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