English 11
CAUTION
• Use a pipe cutter and flare suitable for the type of refrigerant.
• Apply ester oil or ether oil around the flare section before connecting.
• To prevent dust, moisture or other foreign matter from infiltrating the tube, either pinch the end or cover
it with tape.
• Do not allow anything other than the designated refrigerant to get mixed into the refrigerant circuit, such
as air, etc. If any refrigerant gas leaks while working on the unit, ventilate the room thoroughly right away.
• Do not mix air or other gas with the specified refrigerant in the refrig-
eration cycle.
• Ventilate the room if refrigerant gas leaks during the work.
• The outdoor unit is charged with refrigerant.
• Be sure to use both a spanner and torque wrench together, as shown in the
drawing, when connecting or disconnecting pipes to/from the unit.
(Refer to Fig. 14)
• Refer to “Table 3” for the dimensions of flare nut spaces.
• When connecting the flare nut, apply ester oil or ether oil to the flare
section (inside), and spin 3-4 times before screwing in.
(Refer to Fig. 15)
• Keep all the screw mounting resin parts (e.g., piping presser
plates) away from oil.
If oil adheres, the strength of the screw mounting resin parts may
drop.
CAUTION
Over-tightening the flare nut may break it and/or cause the
refrigerant to leak.
NOTE
• Use the flare nut included with the unit main body.
Ta bl e 3
• Refer to “Table 3” to determine the proper tightening torque.
Pipe size Tightening torque Flare dimensions A (in.) Flare shape
φ 1/4
10.4 – 12.7lbf·ft. 0.342 – 0.358
φ 3/8
24.1 – 29.4lbf·ft. 0.504 – 0.520
φ 1/2
36.5 – 44.5lbf·ft. 0.638 – 0.654
φ 5/8
45.6 – 55.6lbf·ft. 0.760 – 0.776
To rque wrench
Spanner
Pipe union
Flare nut
Fig. 14
&IG
#OATHEREWITHESTERORETHEROIL
A
45
0
±
2
0
R0.016-0.031
90
0
±
2
0
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