Precaution On Installation - ComfortStar BAR4 Service Manual

1 . P reca u tio n o n In s talla tio n
1.1 M easu re th e n ecessary len g th o f th e co n n ectin g p ip e, an d m ake it b y th e fo llo w in g
w ay
a. Connect the indoor unit at first, then the outdoor unit. Bend the tubing in proper way.
C A U T IO N S :
 Daub the surfaces of the flare pipe and the joint nuts with frozen oil, and wrench it for
3~4 rounds;
 Fasten the flare nuts;
 Be sure to use two wrenches simultaneously when you connect or disconnect the pipes.
b. The stop value of the outdoor unit should be closed absolutely (as original state). Every
time you connect it, first loosen the nuts at the part of stop value, then connect the flare
pipe immediately (in 5 minutes). If the nuts have been loosened for a long time, dusts and
other impurities may enter the pipe system and may cause malfunction later. So please
expel the air out of the pipe with refrigerant before connection.
c. Emptying the air after connecting the refrigerant pipe with the indoor unit and the outdoor
unit. Then fasten the nuts at the repair-points.
1.2 L o cate th e P ip e
a. Drill a hole in the wall (suitable just for the size of the wall conduit), then set on the fittings
such as the wall conduit and its cover.
b. Bind the connecting pipe and the cables together tightly with binding tapes. Do not let air
in, which will cause water leakage by condensation.
c. Pass the bound connecting pipe through the wall conduit from outside. Be careful of the
pipe allocation to do no damage to the tubing.
d. Insolate the pipeline from all piping systems.
e. Try to reduce the number of 90° laps.
1.3 C o n n e ct th e p ip es
Connecting Dimensions of Refrigerant Lines and Service Valves are shown as below
table:
Installation 2