10
NACM/EACM
ROOM AIR CONDITIONER - SPLIT WALL-MOUNTED TYPE
AIR PURGING AND TEST OPERATION
TIGHTENING CONNECTION
Align pipes to be connected.
Sufficiently tighten the flare nut with fingers, and then tighten
it with a spanner and torque wrench as shown.
Excessive torque can break nut depending on installation
conditions.
CONNECT THE CABLE TO THE OUTDOOR UNIT
1
2
3
4
5
Remove the electrical control board cover from the outdoor
unit by loosening the screw.
Connect the connective cables to the terminals as identified
with their respective matched numbers on the terminal block
of indoor and outdoor units.
Secure the cable onto the control board with the cord clamp.
To prevent the ingress of water, form a loop of the connective
cable as illustrated in the installation diagram of indoor and
outdoor units.
Insulate unused cords (conductors) with PVC-tape. Process
them so they do not touch any electrical or metal parts.
Connective pipe length will affect the capacity and energy
efficiency of the unit. The nominal efficiency is tested basing on the
pipe length of 7.5m (25ft).
Air purging
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:
1
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.
CAUTION
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.
NOTE
Cover
Screw
Terminal block of outdoor unit
To indoor unit
To indoor unit
Terminal block of outdoor unit
To indoor unit
Model < 12000 Btu/h
Model 12000 Btu/h
