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8.8 Testing of Drainage System
(1) After the electrical installation is completed, conduct the testing of the drainage system.
(2) During the test, check if the water correctly flows through the pipelines. Carefully check the joints to
ensure that there is no leakage. If the unit is to be installed in a new house, carry out testing before deco-
rating the ceiling.
8.9 Selection of
the
Refrigerant Pipe
Item
Model
R24PEV1K+FDM24PEV1K
RY24PEV1K+FDYM24PEV1K
R30PEV1K+FDM30PEV1K
RY30PEV1K+FDYM30PEV1K
R36PEY1K+ FDM36PEV1K
RY36PEY1K+ FDYM36PEV1K
R42PEY1K+ FDM42PEV1K
RY42PEY1K+ FDYM42PEV1K
R48PEY1K+ FDM48PEV K
RY48PEY1K+ FDYM48PEV1K
Note:
1. The standard pipe length is 5m. When the length (L) of the refrigerant pipe is less than or equals 5m,
there is no need to add refrigerant. If the pipe is longer than 5m, it is required to add refrigerant.
In the above table, the amounts of refrigerant to be added for the models are listed for each additional
meter of pipe length.
2. The pipe thickness shall be 0.5-1.0 mm and the pipe
6.0 MPa.
3. The longer the
r
efrigerant
8.10 Connection of
the Refrigerant Pipe
1. Align the flared end of the copper pipe with the center of the thread joint. Manually tighten the fl ared end
nut.
2. Use torque spanner to tighten the flared end nut until the spanner clatters (Fig.8.12).
Fitting Pipe for
Indoor Unit
Spanner
English
Size of the Refri-
gerant Pipe
(inch)
Gas
Liquid
Pipe
Pipe
5/8
3/8
3/4
1/2
1
pipe, the lower the cooling effect and the heating effect.
Flaring
Fittng Pipe
Nuts
Torque Spanner
Fig.8.11
Max.
Max. Height
Pipe
Difference between
Length
Indoor Unit and
(m)
Outdoor Unit (m)
30
15
50
30
thickness
shall be able to withstand the pressure of
Liquid Valve Gas Valve
Inner Hexagon Spanner
Screwdriver
Fig.8.12
Amount of Additional
Refrigerant to be Filled
(For Extra Length of
Pipe)
60g/m
120g/m
One-Way
Valve
Valve Cap
Valve
Stem
31
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