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8.9 Selection of Connecting Pipe
Item
Model
Size of Fitting
Pipe (inch)
Max.
Pipe
Length
(m)
Max. Height
Difference between
Indoor Unit and
Outdoor Unit (m)
Amount of Additional
Refrigerant to be Filled
(For Extra Length of
Pipe)
Gas
Pipe
Liquid
Pipe
RFDM24PEV1K
RYFDYM24PEV1K
5/8
3/8
30
15
60g/m
RFDM30PEV1K
RYFDYM30PEV1K
R FDM36PEV1K
RY FDYM36PEV1K
3/4
1/2
50
30
120g/m
R FDM42PEV1K
RY FDYM42PEV1K
R FDM48PEV1K
RY FDYM48PEV1K
Note:
The standard pipe length is 5m. When the length (L) of the connecting pipe is less than or equals 7m,
1.
there is no need to add refrigerant. If the connecting pipe is longer than 5m, it is required to add refriger-
ant. In the above table, the amounts of refrigerant to be added for the models are listed for each addi-
tional meter of pipe length.
The pipe thickness shall be 0.5-1.0 mm and the pipe thickness shall be able to withstand the pressure
2.
of 6.0 MPa.
The longer the connecting pipe, the lower the cooling effect and the heating effect.
3.
8.10 Connection of Pipeline
Align the fl ared end of the copper pipe with the center of the thread joint. Manually tighten the fl ared end
1.
nut.
Use torque spanner to tighten the fl ared end nut until the spanner clatters (Fig.8.12).
2.
Fitting Pipe for
Indoor Unit
Flaring
Nuts
Spanner
Torque Spanner
Fittng Pipe
Liquid Valve Gas Valve
Valve Cap
Inner Hexagon Spanner
Screwdriver
One-Way
Valve
Valve
Stem
8.11
Fig.
8.12
Fig.
01_EN_EM09A058A.indd 31
01_EN_EM09A058A.indd 31
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5/13/2010 11:43:35 AM