Daikin FXKQ32AVM, Installation Manual

Page: 9 / 64

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Caution----------------
• Be sure to use the specified refrigerant during refrigerant
circulation and prevent the air from contaminating the
refrigerant.
• If refrigerant leaks during installation work, be sure to
ventilate the rooms.
(1 )Connect the piping.
• The outdoor unit have been charged with the refrigerant.
• Aim the refrigerant piping connector section at the center
of the flaring part. Turn 3-4 circles with your hands and
tighten with the specified tightening torque.
• To prevent the flaring part from cracking or leaking gas,
tighten with a torque wrench. (Refer to Figure 10)
• To prevent gas leakage, coat the refrigerant oil (ester or
ether oil) to the inner side of the flaring part.
(Refer to Figure11)
• Secure the flaring nut to the main unit. (To prevent the
flaring nut form aging and cracking)
• Refer to Table 1 for the flaring size and tightening torque.
[Tighten] [Coat oil]
Torque wrench
Wrench
Don't coat the refrigerant oil
to the external surface
Figure 11
Coat the refrigerant
oil to the internal
surface of the flaring
I �
���s--
Flaring
X
Note: Be sure to align the center of the refrigerant piping
connector part with the ones of the flaring part and flaring
nut.
Failure to do so may result in piping breakage or gas leakage.
Table 1
Pipe
Tightening torque
Flaring size
Flaring
diameter A (mm)
¢>6.4(1/4")
14.2-17.2N · m
8.7-9.1
(144-176kgf · cm)
<1>9.5(3/8")
32.7-39.9N · m
12.8-13.2
F-.,
(333-407kgf · cm)
'N
/I
R0.4-0.8
+I
�
49.5-60.3N · m
�
1JI/
<1>12.7(1/2")
(504-616kgf · cm)
16.2-16.6
¢>15.9(5/8"}
61.8-75.4N · m
19.3-19.7
(630-770kgf · cm)
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Caution---------------­
Screwing overtight will damage the flaring and result in
refrigerant leakage.
Please note that do not apply the oil to other parts excluding
the flaring nut. Appling the oil to resin part, etc. will result in
damage.
• If there is no torque wrench, refer to Table 2.
It is not recommended and only use in emergency.
It's necessary to use the torque wrench to install the units. If
you have to install the units but without the torque wrench,
then perform installation based on following approach.
After completing installation work, be sure to check for gas
leakage.
When tightening the flaring nut with a wrench, the tightening
torque will suddenly increase at certain position. In this case,
continue rotate the flaring nut to the following angles from
this position.
Table 2
Piping size Further tightening angle
Recommended tool arm
length
<1>6.4(1/4") 60 - 90 degrees 150mm around
<1>9.5(3/8")
60 - 90 degrees 200mm around
¢>12.7(1/2") 30 - 60 degrees 250mm around
<1>15.9(5/8") 30 - 60 degrees 300mm around
(2)After piping connection is finished, check if gas leaks.
(3)After checking that there is no gas leakage, insulate the
piping connector part properly with insulation material.
(Refer to Figure 12)
• When performing insulation, attach the included joint in­
sulation parts® and ®to the liquid side piping and gas
side piping. in addition, make the seams of the joint
insulation parts ®and ®face upward. (Pinch both
ends with the clamps@.)
• For the liquid side piping and gas side piping, wrap the
medium insulation material @and @to the joint
insulation parts® and® . (Flaring nut part)
Insulation of the liquid side piping
Piping insulation part Joint insulation part® (accessory)
(main unit side)
Clam s@
(accessories)
Flaring nut connector part Medium insulation material@
Seam facing upward
(accessory)
Wrap to the flaring
nut joint.
Liquid side piping
Insulation of the gas side piping
Piping insulation part
(main unit side)
Main unit
Clamps@
(accessories)
Joint insulation art@
( accessory)
Seam facing upward
Flaring nut connector part Medium
(accessory
in
�
ulation material @
Figure 12
Wrap to the flaring
nut joint.
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Caution---------------­
For piping connected locally, wrap the insulation material till
the piping connections. The naked piping may result in
condensation and burns
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