20
Installation and Maintenance
Service Manual
2) Allowable pipe length and drop height among indoor and outdoor units
If the total refrigerant pipe length (liquid pipe) is smaller than that listed in the table below, no additional refrigerant will be charged.
Allowable Length and Height Fall of the Refrigerant Pipe
Allowable Value
CHML-U
36
RK4
75m
25m
15m
15m
15m
15m
7.5m
7.5m
25m
75m
CHML-U
42
RK5
Fitting pipe
Total length(actual length) of
fitting pipe
length of farthest fitting pipe(ft)
Outdoor unit
at upper
Outdoor unit
at lower
Height difference between
indoor units(ft)
Height difference
between outdoor
unit and indoor
unit
b
a
e
d
c
L4
L3
L2
L5
L1
Outdoor unit
Height di
fference between indoor unit and outdoor unit H1
Height di
fference between
indoo
r units H
2
Indoor unit
Indoor unit
Equivalent length of the farthest fitting pipe L
x
Model
CHML-U
36
RK4
CHML-U
42
RK5
Total Liquid Pipe
Lenght(a+b+c+d+e)
40
40
Fig.6