Daikin FVQ71BV, Руководство по установке, Страница: 9 / 24

English 7
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.
• The outdoor unit is charged with refrigerant.
• Use copper alloy seamless pipes (ISO 1337).
• 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. 1)
• Refer to “Table 1” for the dimensions of flare nut spaces.
• When connecting the flare nut, coat the flare section (both
inside and outside) with ester oil or ether oil, rotate three or four
times first, then screw in.
(Refer to Fig. 2)
NOTE
• Use the flare nut included with the unit main body.
CAUTION
Do not let oil get on the screw holders on the dressing board.
Oil can weaken the screw holders.
Table 1
• Refer to “Table 1” to determine the proper tightening torque.
CAUTION
Overtightening may damage the flare and cause a refrigerant leakage.
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to install the unit without a torque wrench, you may
follow the installation method mentioned below.
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
suddenly increases. From that position, further tighten the flare nut the angle shown below:
Pipe size Tightening torque Flare dimensions A (mm) Flare
φ
9.5 (3/8”) 32.7 - 39.9 N·m 12.8 - 13.2
φ
15.9 (5/8”) 61.8 - 75.4 N·m 19.3 - 19.7
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
Fig. 2
Ester oil or ether oil
Torque wrench
Flare nut
Piping union
Spanner
Fig. 1
A
45˚
Ⳳ
2˚
R0.4-0.8
90˚
Ⳳ
0.5˚
01_EN_3PA60136-8Y.fm Page 7 Saturday, December 22, 2007 1:04 PM