
69
10. Installation
Refrigerant pipe installation
Classification
Example
Remarks
Maximum
allowable
length of
pipe
Outdoor unit ~
Indoor unit
Actual
length
(Equivalent
length)
200m
and
below
(220m
and
below)
Installing only with
Y-joint
a+b+c+d+e+f+g+p ≤
200m(220m)
Equivalent
length
Y-joint: 0.5 m,
Distribution
header: 1 m
Installing with Y-joint
and distribution header
a+b+h ≤ 200m (220m),
a+i+k ≤ 200m (220m)
Installing only with
distribution header
a+i ≤ 200m (220m)
Total
length of
pipe (m)
1,000
m or
less
Installing only with
Y-joint
a+b+c+d+e+f+g+h+i+
j+k+l+m+n+p ≤ 1000m
-
Installing with Y-joint
and distribution header
a+b+c+d+e+f+g+h+i+j+k
≤ 1000m
-
Installing only with
distribution header
a+b+c+d+e+f+g+h+i
≤ 1000m
-
Outdoor unit
~ Outdoor
unit (Module
installation)
Pipe length 10 m or
less
x ≤ 10 m, y ≤ 10 m, z ≤ 10 m
Equivalent
length
13 m or
less
x ≤ 13 m, y ≤ 13 m, z ≤ 13 m
Maximum
allowable
height
difference
of pipe
Outdoor unit ~
Indoor unit
110/110m
Note 2)
H1 ≤ 110/110m
Indoor unit ~
Indoor unit
50m or less
H2 ≤ 50m
But, when AM
✴✴✴✴
NQDEH
✴✴✴
/ AM
✴✴✴
JNVDKH
✴✴✴
is installed, H2 is 15 m or less.
Maximum
allowable
length after
branch joint
First branch
joint ~
Farthest
Indoor unit
Pipe
length
45 m or
less
Installing only with
Y-joint
b+c+d+e+f+g+p ≤ 45 m
-
Installing with Y-joint
and distribution header
i+k ≤ 45 m
Installing only with
distribution header
i ≤ 45 m
45 m~
90 m
Note 1)
Required conditions must be satisfied
-