Tesla TT26X71-0932IA, User Manual

Page: 22 / 270

22
ENG
Connecting the pipes
Bleeding
Bleeding
Refrigerant Pressure Inspection
Screw the flare nuts to the outdoor unit coupling with the
same tightening procedures described for the indoor
unit. To avoid leakage, pay attention to the following
points:
1. Tighten the flare nuts using two wrenches. Pay
attention not to damage the pipes.
2. If the tightening torque is not sufficient , there
will probably be some leakage. With excessive
tightening torque there will also be some leakage, as
the flange could be damaged.
3. The surest system consists in tightening the
connection by using a fix wrench and a torque
wrench.
Air and humidity left inside the refrigerant circuit
can cause compressor malfunction. After having
connected the indoor and outdoor units, bleed the
air and humidity from the refrigerant circuit by using
a vacuum pump.
The air and humidity left inside the refrigerant circulat- ion can cause compressor malfunction. After having
connected the indoor and outdoor units, bleed the air and humidity from the refrigerant circulation using a vacuum
pump.
1. Unscrew and remove the caps from the 2 - way and 3-way valves.
2. Unscrew and remove the cap from the service port.
3. Connect the vacuum pump hose to the service port.
4. Operate the vacuum pump for 10 - 15 minutes until an absolute vacuum of 10 mm Hg has been reached.
5. With the vacuum pump still in operation , close the low - pressure knob on the vacuum pump coupling. Stop
the vacuum pump.
6. Open the 2 - way valve by 1/4 turn and then close it after10 seconds. Check all the joints for leaks using liquid
soap or an electronic leak device.
7. Turn the body of the 2-way and 3-way valves. Disconnect the vacuum pump hose.
8. Replace and tighten all the caps on the valves.
Air-returning Low-pressure Range of Refrigerant R290:
0.4-0.6Mpa; Air-exhausting High-pressure Range: 1.5-
2.0Mpa;
Air-returning Low-pressure Range of Refrigerant R32:
0.8-1.2Mpa; Air-exhausting High-pressure Range: 3.2-
3.7Mpa;
It means that the refrigerating system or refrigerant of an
air conditioner is abnormal if the air-exhausting and air-
returning pressure ranges of the detected compressor
exceed the nor mal ranges to a large extent.
connection pipes
flare nuts
liquid tap
gas tap
gas valve
liquid valve
tap
protection caps
service port nut
indoor unit
vacuum pump service port