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Installation instructions
4. Piping Connection
(1) Confirm that the valve is closed.
(2) Connect the indoor unit and the outdoor unit with
field-supplied refrigerant piping. Suspend the refrigerant
piping at certain points and prevent the refrigerant piping
from touching the weak part of the building such as wall,
ceiling, etc. (If touched, abnormal sound may occur due
to the vibration of the piping. Pay special attention in case
of short piping length.)
(3) Tightening the flare nut use two spanners like figure right.
(4) Apply the refrigerant oil (field-supply) thinly at the seat
surface of the flare nut and pipe before connecting and
tightening.
(5) Outdoor refrigerant piping should be connected with stop
valves.
(6) After finishing connecting the refrigerant pipes, keep it
warm with the insulation material like figure right after
air-tight test.
· For outdoor unit side, surely insulate every piping including
valves.
· Cover piping joints with pipe cover.
· Using piping tape, apply taping starting from the entry
of outdoor unit. Fix the end of piping tape with adhesive
tape.
- Fix the end of piping tape with adhesive tape.
- When piping has to be arranged through above ceiling,
closet or area where temperature and humidity are high,
wind additional commercially sold insulation for prevention
of condensation.
If the diameter of connection pipe does not match the port size of outdoor unit, select proper different-
diameter joints in the accessory according to the following table.
Figure
Change pipe diameter from 3/8 inch
(9.52mm) to 1/2 inch (12.7mm)
！
Purpose
Pipe Size
Clamp(field-supplied) Insulation (field-supplied)
CAUTION
危
险
Outdoor unit
Connect pipes using different-diameter joint
14
W
Double Spanner
ork
Torque
Tightening Torque for Flare Nut
Refrigerant pipe
(field-supplied)
(
Piping insulation procedure
Different-diameter joint
Indoor unit
Insulation
field-supplied
)
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