Hisense AVWT-408FHFSHA Installation Manual page 24

5.4.1 Stop Valve
<Gas Valve>
(1) Make sure that all the stop valves are closed completely;
(2) Connect the charging hose to the service port and release gas from the gas pipe;
(3) Cut off the end of the closing pipe (Φ1/4in.) and check that no gas exists inside the gas pipe;
(4) Remove the stop valve cover;
(5) Remove the closing pipe from the brazing portion by using a burner. Pay attention to the flame from the burner
not to burn the stop valve body.
Service Port
Low Pressure
Gas Valve
Gas Pipe
Details of Closing Pipe
Cut from here
Φ1/4in. Pipe
●
Ensure that there is no gas inside the pipe when removing the closing pipe. Otherwise, the pipe may be blown out and
it may lead to injuries.
● Protect the return oil pipe and sound-proof cover of the compressor with the metal plate when using a burner.
● Stop valve is detailed as below:
Cap Tightening torque: b N·m
Allen Wrench
Open/Close
spindle valve
O-ring
Spindle Valve
Counterclockwise......open
Clockwise......close
Tightening torque: c ft·lbs
(N·m)
●
Do not apply an excessively big force to the spindle valve at the end of opening, otherwise the stop valve will be
damaged.
●
At the test run, fully open the spindle. If not, the devices will be damaged.
Spindle
High Low
Pressure Gas Valve
Brazing Portion of
Closing Pipe
Check Joint for Service Port
Only the charge hose can be
connected Tightening
torque: a ft·lbs(N·m)
Refrigerant Pressure
Gas Valve
Torque a
Model
ft·lbs(N·m)
72~192
11.1(15)
Sound-Proof Cover
Metal Plate for Protection
CAUTION
Check Joint for Service Port
Only the charge hose can be
connected. Tightening
torque: 33.3ft·lbs(15 N·m)
Cap Tightening torque: e
ft·lbs(N·m)
O-ring
Allen Wrench
Open/Close
spindle valve
Spindle Valve
Counterclockwise......open
Clockwise......close
Tightening torque: d ft·lbs
(N·m)
Refrigerant Piping
Torque b
Torque c
ft·lbs(N·m)
ft·lbs(N·m)
40.5(55) 22.1(30)
CAUTION
16
Stop Valve
Burner
Fig. 5.2
Liquid Valve
Torque d
Model
ft·lbs(N·m)
72~96
5.2(7)
7.4(10)
120
144~192
9.6(13)
Refrigerant Pressure
Torque e
ft·lbs(N·m)
18.4(25)
22.1(30)
25.8(35)