Piping connection - indoor unit
a. Connecting the indoor unit tubing to the connection piping:
Align the centres of the pipes and sufficiently tighten the flare
nut with your hands first.
indoor unit tubing
flare nut
piping
torque
wrench
spanner (fixed)
flare nut
piping
indoor unit piping
Then tighten the flare nut with spanner and torque wrench
referring to the following:
Outer diameter (mm) Torque (N.m)
6.35 (1/4”)
15-16
9.52 (3/8”)
31-32
12.70 (1/2”)
40-41
15.88 (5/8”)
45-46
caution
Excessive torque can break the nut depending on installation
conditions.
b. Wrap the insulation material around the connecting portion:
Cover the indoor unit pipe and the connection pipe with the
heat insulation material. Bind them together with vinyl tape so
that there is no gap.
insulating material
Isolate the suction pipe from the liquid pipe.
heat insulation
suction line pipe liquid line pipe
Wrap the insulated pipes with vinyl tape in the rear section for
pipe housing. Fasten the power cable to the pipes with vinyl
tape.
connection pipe
vinyl tape (wide)
wrap with vinyl tape
indoor unit pipe
vinyl tape (narrow)
pipe
connection
cable
Wrap the piping, drain hose and power cable tightly with vinyl
tape so that they can fit into the rear piping housing section.
wrap with vinyl
tape (wide)
vinyl tape (narrow)
pipe
drain hose
connection
power cable
Indoor unit installation
Kelvinator Air Conditioning Installation instructions 17
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