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
Refrigerant Pipe
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
shall be able to withstand the pressure of
6.0 MPa.
3. The longer the
pipe, the lower the cooling effect and the heating effect.
8.10 Connection of
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
Flaring
Nuts
Spanner
Torque Spanner
Fittng Pipe
Liquid Valve Gas Valve
Valve Cap
Inner Hexagon Spanner
Screwdriver
One-Way
Valve
Valve
Stem
Fig.8.11
Fig.8.12
Item
Model
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
R FDM42PEV1K
RY FDYM42PEV1K
3/4
1/2
50
30
120g/m
R FDM48PEV K
1
RY FDYM48PEV1K
thickness
English
31
efrigerant
r
the Refrigerant Pipe
Size of the Refri-
(inch)
gerant Pipe
the
