25
EN
KEN002VAC
v1• 11.11.2020
ELECTRICAL CONNECTIONS
CONNECTING THE PIPES
BLEEDING
REFRIGERANT PRESSURE INSPECTION
1. Remove the handle on the right side plate of outdoor unit.
2. Connect the power connection cord to the terminal board.
Wiring should fit that of indoor unit.
3. Fix the power connection cord with wire clamp.
4. Confirm if the wire has been fixed properly.
5. An efficient earth connection must be ensured.
6. Recover the handle.
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: in this case use the table.
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.
Air-returning Low-pressure Range of Refrigerant R290: 0.4-0.6
Mpa; Air-exhausting High-pressure Range: 1.5-2.0 Mpa;
Air-returning Low-pressure Range of Refrigerant R32: 0.8-1.2
Mpa; Air-exhausting High-pressure Range: 3.2-3.7 Mpa;
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.
wiring diagram on
the back of the
cover
screw
connection
pipes
flare nuts
gas tap
indoor unit
gas valve
liquid valve
tap
protection
caps
service
port unit
vacuum pump
service port
