cecotec ENERGYSILENCE 12000 AIR CLIMA Manuel D'instructions page 36

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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
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
68 ENERGYSILENCE 12000 AIR CLIMA
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
5. Piping
6. Gasket
7. Indoor
8. Outdoor
Wind insulating covering around the joints of the indoor unit and fix it with insulating tape.
Fix the exceeding part of the signal cable to the piping or to the outdoor unit.
Fix the piping to the wall (after having coated it with insulating tape) using clamps or any other
fixing element.
Seal the hole in the wall through which the piping is passed so that no air or water can fill.
Indoor unit test
Do the On/Off and fan operate normally?
Does the mode operate normally?
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ENERGYSILENCE 12000 AIR CLIMA 69