English
8
•
When connecting the flare nut, apply ester oil
or ether oil to the flare section (both inside and out-
side), and spin 3-4 times before screwing in.
(Refer to Fig. 10 )
Table 2
•
Refer to “Table 2” to determine the proper tightening torque.
For reference
If a torque wrench is not available, use the following method as a rule of thumb.
After the work is finished, make sure to check that there is no gas leak.
When you keep on tightening the flare nut with a spanner, there is a point where the tightening torque sud-
denly increases. From that position, further tighten the flare nut the angle shown below:
Table 3
•
After piping work is done, check all the pipe connections to ensure no nitrogen or other gases are leaking.
•
After checking for gas leaks in the pipe connections, insulate them as shown in Fig. 11 and 12.
(Install so that no pipes are exposed, as this may cause leaking.)
Pipe size
Further tightening angle
Recommended arm length of tool
φ
9.5 (3/8”)
60 to 90 degrees
Approx. 200mm
φ
15.9 (5/8”)
30 to 60 degrees
Approx. 300mm
φ
19.1 (3/4”)
20 to 35 degrees
Approx. 450mm
Coat here with ester or ether oil.
Fig. 10
Type of refrigerant
Applicable model
Flare dimensions A (mm)
R22, R407C
FAY-FJV1
FAYP-BV1
R410A
FAQ
Pipe size Tightening torque
R0.4-0.8
A
90
˚±
0.5
˚
45
˚±
2˚
32.7-39.9 N • m
61.8-75.4 N • m
97.2-118.8 N • m
φ
9.5(3/8”)
φ
15.9(5/8”)
φ
19.1(3/4”)
Flare
12.6 – 13.0
19.0 – 19.4
23.3 – 23.7
12.8 – 13.2
19.3 – 19.7
Liquid pipe
Fig. 11
2) 3) Wrap fitting with
provided insulation
Seal ends with vinyl tape.
(procure in the field.)
Gas pipe
Start wrapping tape here.
Use provided insulation tape.
Fig. 12
01_EN_3P184443-2.fm Page 8 Monday, July 3, 2006 3:14 PM
