'17 • KX-T-264
◦
Use
phosphorus deoxidized copper alloy seamless pipe (C1220T specified in JIS H
3300) for
refrigeration pipe installation.
In addition, make sure there is no damage both inside and outside of the pipe, and no harmful substances such as
sulfur, oxide, dust or contaminant stuck on the pipes.
In the case of are connection,
Please check there is no burr or scratches on the are surface. Please check D
dimension after matching.
◦
When fastening the flare nut, align the refrigeration pipe with the center of flare nut, screw the nut
for 3-4 times by hand and then tighten it by spanner with the specified torque mentioned in the
table above. Make sure to hold the pipe in the indoor unit securely by a spanner when tightening
the nut in order to avoid unexpected stress on the copper pipe.
◦
After they are checked for a gas leak, cover the insulation and tighten both ends firmly with the
band.
◦
Please reinforce the insulation of refrigerant pipes in use under high humidity condition
R410A
Conventional tool
6.35 0.8 8.7～9.1 14～18
9.52 0.8 12.8～13.2 34～32
12.7 0.8 16.2～16.6 49～61
15.88 1 19.3～19.7 68～82
19.05 1.2 23.6～24.0 100～120
Flare O.D.
Ｄ
mm
Flare nut
tightening
torque
Ｎ･m
0.7～1.3
Min. pipe
wall thickness
mm
Protruding dimension for flare, mm
Rigid（Clitch type）
Temperature of piping between EEV-SET and indoor unit will be lower than the other liquid piping.
We highly recommend to use piping insulation with thickness of 20mm or more.
CAUTION
Refrigerating oil should not be applied to the threads of union or external surface of flare. It is because, even if the same
tightening torque is applied, the oil is likely to decrease the slide friction force on the threads and increase, in turn, the
axial component force so that it could crack the flare by the stress corrosion.
Refrigerating machine oil may be applied to the internal surface of flare only.
③
Electrical wiring
1. The original expansion valve inside the indoor unit should be fully opened.
A) In case power source is turned off.
Turn ON the power source in indoor unit.
The expansion valve of indoor unit is fully opened automatically with original control of indoor unit.
Please go the step 2.
B) In case power supply is turned ON. ( Expansion valve is under operation.)
1) Turn OFF the power source of indoor unit.
2) After turn OFF of power source, please disconnect the Superlink line (AB signal line).
3) Turn ON the power source again. The expansion valve is to be fully opened in about 60 seconds.
The indoor unit opens automatically from the fully closed position to the fully open position after closing the
expansion valve when the power is rst turned on.
Please do not turn OFF the power source, or operate indoor unit by remote controll during this 60 sec.
4) Re-connect the Superlink line (A-B signal line).
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