cecotec ENERGYSILENCE 12000 AIR CLIMA CONNECTED Manual De Instrucciones página 40

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2. Flare nuts
3. Liquid tap
4. Gas tap
5. Indoor unit
6. Gas valve
7. Service port nut
8. Liquid valve
9. Tap
10. Protection caps
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.
Refrigerant pressure inspection
Fig. 22.
1. Service port
2. Vacuum pump
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
normal ranges to a large extent.
Bleeding
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.
Fig. 23.
3-way valve diagram
1. Connect to indoor unit
2. Open position
76 ENERGYSILENCE 12000 AIR CLIMA CONNECTED
3. Spindle
4. Needle valve
5. Service port cap
6. Valve core
7. Connect to outdoor unit
Fig. 24.
1. Indoor unit
2. Refrigerant flow direction
3. 2-way valve
4. (6) Open ¼ turn
5. (7) Turn to fully open the valve
6. Valve cap
7. (1) Turn
8. (8) Tighten
9. 3-way valve
10. (7) Turn to fully open the valve
11. (1) Turn
12. (8) Tighten
13. Service port nut
14. (2) Turn
15. (8) Tighten
(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 after 10 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.
Operation test
Fig. 25.
1. Pipe clamps
2. Piping
3. Insulating covering
4. Insulating tape
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ENERGYSILENCE 12000 AIR CLIMA CONNECTED 77