Tesla TT68X71 - Инструкция по эксплуатации - Страница 53

53

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