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38
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'11 • KX-T-166
6.3 Method for connecting the accessory pipe
Method for connecting the accessory pipe
Be sure to use the accessory pipe to connect the operation valve on the
gas side with the field pipe.
Table
1
Parts used for the connecting pipe assembly
Table
2
Length and specification of straight pipe (Procured in the field)
1 Referring to Table 1 and Table 2 , prepare the straight pipe and the elbow in the field, which are
used in the construction examples A-D applicable to the connecting direction.
2 Firstly, use the accessory pipe to assemble the connecting pipe assembly outside the outdoor unit.
As shown in the figures of construction examples A〜D applicable to the connecting direction
(chain double dashed line), braze the accessory pipe and the parts prepared in the above 1 .
●Orient the accessory pipe according to the dimensions as shown in
of Fig. 1.
3 After assembly of the connecting pipe, connect it to the operation valve on the gas side inside the
outdoor unit.
Tighten the flare nut with appropriate torque.
4 After connection of the connecting pipe assembly to the operation valve on the gas side, braze the
connecting pipe assembly and the field pipe.
5 After the brazing, insulate using the attached heat insulating material and band as shown by Fig. 2.
If no nitrogen gas is supplled, a large amount of impurity (oxidized film) will be generated,
which may clog the capillary tube and the expansion valve, resulting in fatal malfunction.
Be sure to use pipes of 1/2H material, and wall thickness above 1mm. (Pressure resistance of O-type
pipe is not enough)
Select and use the pipes, which are procured in the field,
according to the specification that corresponds to the
outdoor unit capacity as described in the installation manual.
Be sure to braze while supplying nitrogen gas.
About brazing
Name
Accessory pipe
Heat insulating material
Band
Straight pipe
1
Straight pipe
2
Elbow
A
Downward
B
Forward
C
Rightward
D
Backward
No.
1
2
3
4
5
6
Quantity
1
1
2
1
1 or 0
1 or 0
Remark
Accessory
Accessory
Accessory
Procured at the field
Procured at the field (Not required for downward direction)
Procured at the field (Not required for downward direction)
Straight pipe
1
Straight pipe
2
Straight pipe 1
Straight pipe 2
270 mm or over
—
70〜120mm
125mm or over
70〜120mm
125mm or over
70〜120mm
515mm or over
224
280
ø19.05-ø25.4
ø22.22-ø28.58
PSB012D917G
k
ø19.05
100~120N·m
Accessory pipe
Accessory pipe
Accessory pipe
Accessory pipe
Internal face of base
Operation valve connecting
position at gas side
Band
Proper torque
(Accessory)
(Accessory)
Pipe specification
Heat insulating material
Internal face of base
(Procured in the field,
125 mm or more)
Straight pipe
2
(Procured in the field,
125 mm or more)
Straight pipe 2
(Procured in the field,
515 mm or more)
Elbow,
procured in the field
Elbow,
procured in the field
Elbow,
procured in the field
Braze the refrigerant pipe here.
Braze the refrigerant pipe here.
Braze the refrigerant
pipe here.
Braze the refrigerant
pipe here.
Connection example of refrigerant pipe - B
(Forward connection)
Connection example of refrigerant pipe - D
(Backward connection)
Connection example of refrigerant pipe - C
(Rightward connection)
Connection example of refrigerant pipe - A
(Downward connection)
Heat insulating method
(Fig. 2)
Accessory pipe x 1 pc
Heat insulating
material x 1 pc
Band x 2 pcs
Heat insulating material is attached to the accessory pipe with
band. When installing the heat insulating material, cut the band
and retrieve it.
Two pieces of fig. 2 band for installation are found in a bag.
40
67
(Procured in the field,
70 - 120 mm)
Straight pipe
1
(Procured in the field,
70 - 120 mm)
Straight pipe 1
(Procured in the field,
70 - 120 mm)
Straight pipe 1
(Procured in the field,
270 mm or more)
Accessory pipe position
(Fig. 1)
