PMGB0406B rev.1
47
20.2 Piping Connection Work
(2) Perform the
À
aring work as shown below.
(3) Use the
À
are nut shipped with the unit.
(4) Verify that there are no scratches, burrs stuck to internal surfaces, or surface deformations at the
À
ared
opening.
(5) Before tightening the
À
are nut, apply the refrigerant oil (
¿
eld-supplied) in a thin layer over the
À
ared part.
(Do not apply the oil on other areas.) Tighten the
À
are nut for the liquid pipe to the speci
¿
ed torque with
two spanners. Then, tighten the
À
are nut for the gas piping in the same way. After tightening, check that
no refrigerant leakage occurs.
NOTE:
Refrigerant oil is
¿
eld-supplied.
[ Ethereal Oil FVC50K, FVC68D (Idemitsu Kousan Co. Ltd.) ]
Figure 20. Piping Connections
Figure 21. Flare Dimensions
Liquid Pipe Line
Expansion Valve Box
of DX-Kit
Outdoor Unit
Air Handler
Gas Pipe Line
Make sure to attach
the reducer(accessory)
on the gas pipe
connection
Control Box
of DX-Kit
Direction of
Refrigerant Flow
in Cooling Mode
Indoor Unit
Liquid Pipe Line
Expansion Valve Box
of DX-Kit
Outdoor Unit
Air Handler
Gas Pipe Line
Make sure to attach
the reducer(accessory)
on the gas pipe
connection
Control Box
of DX-Kit
Direction of
Refrigerant Flow
in Cooling Mode
Indoor Unit
Liquid Pipe Line
Expansion Valve Box
of DX-Kit
Outdoor Unit
Air Handler
Gas Pipe Line
Make sure to attach
the reducer(accessory)
on the gas pipe
connection
Control Box
of DX-Kit
Direction of
Refrigerant Flow
in Cooling Mode
Indoor Unit
Unit: inch (mm)
0.4 ~ 0.8R
φ
0.52 to -0.02
φ
3/8 (9.52)
90
o
+ 2
o
45
o
+ 2
o
(13.2 to -0.4)
(1) Example of piping connections is shown below. Make sure to attach the reducer (accessory) to the gas
pipe connection of the air handler. Check the reducer size for the corresponding air handler in Table 12.
(Ins)DX-Kit̲4e-rev1.indd 47
(Ins)DX-Kit̲4e-rev1.indd 47
2016/11/25 15:32:54
2016/11/25 15:32:54
