20
●
Notice for piping end
When installing pipe through the wall,
secure a cap at the end of the pipe.
Correct
Incorrect
Wall hole
Wall hole
Attach a cap or vinyl tape
Do not place the pipe directly on the ground
Correct
Incorrect
Attach a cap or vinyl tape
Attach a cap
or vinyl bag
with rubber band
Correct
Incorrect
Rain water
can enter
●
Piping connection construction precautions
(1) Connect the indoor unit and the outdoor unit with a refrigerant pipe.
Pay attention to the pipeline do not touch the ceiling and other
weakness places. (Otherwise, the you will hear sound of piping
vibration).
Apply refrigerant oil
(2) Apply a layer of refrigerant oil gently to the inner surface of the
piping flaring area before performing flare piping connection.
Use specified torque value with a double wrench operation, to
tighten the flare nut.
First tighten the flare nut for liquid pipe, and then tighten the flare
nut for gas pipe.
After the job is completed, check for leakages.
NOTE:
Refrigeration oil should be supplied on-site. [Model: FV68H].
(3) If the temperature and relative humidity inside the ceiling are more than 27°C / 80%, apply a
layer of insulation pipe (about 10 mm in thickness) to the outer surface of the original insulation
pipe. The insulation pipe attached to the refrigerant pipe to prevent the formation of condensed
water on the surface of the refrigerant pipe. (Refrigerant pipe only).
(4) Apply a pressure of 4.15MPa to test the air tightness of the refrigerant pipe.
(5) Cover the refrigerant pipe junction, reducing pipe connection and all the outer surface of the
refrigerant piping with the insulation tube, and then pack the insulation tube with teflon tape.
● Use double wrench while tightening the flare nut.
Use two wrenches as shown.
Do not apply the two wrenches
work here. Refrigerant leakage
shall occur.
Tightening Work for Stop Valve (liquid)
WARNING
!
Do not apply excessive force when tightening flare nut. Otherwise, the flare connection may
break and cause refrigerant to leak. Please follow the specified torque requirements.
