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11
CAUTION
This product is a dedicated model for refrigerant R410A or R32. At installation, make sure to
observe the following precaution.
•
For flare connection, use dedicated pipe cutter and flaring tools according to the refrigerant
used.
•
Apply ester oil or ether oil to the inside of the flare section before connecting.
•
Use the flare nuts provided with the unit. Do not use a class 1 flare nut.
Otherwise the refrigerant may leak.
•
To prevent dust, moisture or other foreign matters from getting into the tube, either pinch the
tube end or cover the end 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.
•
The outdoor unit is charged with refrigerant.
•
Be sure to use both a spanner and a torque wrench together as shown
in the drawing, when connecting or disconnecting pipes to/from the
unit.
(Refer to Fig. 14)
•
Refer to “Table 2” for the dimensions for flaring.
•
When connecting the flare nut, apply ester oil or ether oil to the inside
of flared section, and turn the nut spin 3-4 times by hand before screw-
ing in.
(Refer to Fig. 15)
CAUTION
•
Be careful not to damage the flare section.
•
Over tightening may damage the flare and cause a refrigerant
leakage.
Table 2
•
Refer to “Table 2” to determine the proper tightening torque.
CAUTION
Be sure to insulate any field piping all the way to the piping connection inside the unit.
Any exposed piping may cause condensation or burns if touched.
Pipe size (mm)
Tightening torque (N·m) Flare dimensions A (mm)
Flare
φ
9.5 (3/8”)
32.7-39.9
12.8 – 13.2
φ
15.9 (5/8”)
61.8-75.4
19.3 – 19.7
Torque wrench
Spanner
Piping union
Flare nut
Fig. 14
Fig. 15
Apply ester or ether oil
to this face.
R0.4-0.8
A
90
0
±
2
0
45
0
±2
0
4PEN468968-1C.book Page 11 Friday, March 24, 2017 1:30 PM