Daikin RZQ20LCVAK, Руководство по установке

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English 18
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Precautions when tightening flare nuts
〉
•
Be sure to remove the flare nuts using two spanners. Then after the piping connection, tighten them using
a spanner and torque wrench.
•
Please refer to the Table 1 for the dimensions for processing flares.
• When connecting the flare nut, coat the flare inner surface with refrigerating machine oil and initially tighten
by hand 3 or 4 turns before tightening firmly.
• Please refer to the Table 1 for the tightening torque. (Too much tightening will end up in splitting of the flare.)
•
After all the piping has been connected, use nitrogen to perform a refrigerant leak check.
Table 1
Pipe size Tightening torque
A dimensions for
processing flares (mm)
Flare shape
φ
9.5
32.7 – 39.9 N·m 12.8 – 13.2
φ
15.9
61.8 – 75.4 N·m 19.3 – 19.7
Inter unit piping for the
Indoor and outdoor units
Compressor
Perform treatment such as caulking
Insulation
(field supply)
Insulation
(field supply)
Wind heat insulation material around
the piping section so it is not exposed
and then cover the insulation material
with vinyl tape.
Fig. 15
Connecting piping
connecting section
Flare nut
Flare nut
Spanner
Union tube joint
Torque
wrench
Coat the flare inner
surface only with
ether oil or ester oil.
A
45˚
2˚
R0.4-0.8
90˚
2˚
01_EN_3P281953-1B.fm Page 18 Tu esday, January 25, 2011 3:35 PM