8
AIR PURGING AND TEST OPERATION
4
5
1. Remove the electrical control board cover from the outdoor unit by loosening the screw.
2. Connect the connective cables to the terminals as identified with their respective matched numbers
on the terminal block of indoor and outdoor units.
3. Secure the cable onto the control board with the cord clamp.
4. To prevent the ingress of water, form a loop of the connective cable as illustrated in the installation
diagram of indoor and outdoor units.
5. Insulate unused cords (conductors) with PVC-tape. Process them so they do not touch any electrical
or metal parts.
Cover
Screw
Terminal block of outdoor unit
Liquid side:
6.35mm
R22: (Pipe length-5)x30g/m
R410A: (Pipe length-5)x20g/m
Liquid side:
9.52mm:
R22: (Pipe length-5)x60g/m
R410A: (Pipe length-5)x40g/m
Connective pipe length
Less than 7.5m
More than 7.5m
Air purging method
Use vacuum pump
Additional amount of refrigerant to be charged
Open the valve stem until it hits against
the stopper. Do not try to open it further.
Securely tighten the valve stem cap with
a spanner or the like.
Valve stem cap tightening torque. See
Tightening torque table.
Flare nut
Stopper
Cap
Valve body
Valve stem
Use vacuum pump
For the R410A refrigerant model, make sure the refrigerant added into air conditioner is liquid
form in any cases.
When relocating the unit to another place, using vacuum pump to perform evacuation.
The indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated
to remove any noncondensables and moisture from the system.
Check that each tube(both liquid and gas side tubes) between the indoor and outdoor units have
been properly connected and all wiring for the test run has been completed.
Pipe length and refrigerant amount:
Outdoor
unit
Indoor
unit
Refrigerant
Packed valve
Flare nut
Gas side
Liquid side
A
C
D
B
1. Air purging
CONNECT THE CABLE TO THE OUTDOOR UNIT
CAUTION
To indoor unit
To power supply
1(L) 2(N) S L N
