50
Refrigerant pipe installation
Allowable length of the refrigerant pipe and the installation examples
H/P
Classification
Single Installation
Module installation
Installing only with
Y-joint
Branch joint
Outdoor unit
Indoor unit
Branch joint
Outdoor unit
Indoor unit
Installing with
Y-joint and
distribution header
Branch joint
Distribution header
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Distribution header
Branch joint
Installing only with
distribution header
Outdoor unit
Indoor unit
Distribution header
Outdoor unit
Indoor unit
Distribution header
Classification
Example
Remarks
Maximum
allowable
length of
pipe
Outdoor unit ~
Indoor unit
Actual length
(Equivalent
length)
200m (656')
and below
[220m (722')
and below]
Installing only with
Y-joint
a+b+c+d+e+f+g+p ≤
200m(220m)/656'(722')
Equivalent length
Y-joint: 0.5m (1.64'),
Distribution header:
1m (3.28')
Installing with
Y-joint and
distribution header
a+b+h ≤
200m(220m)/656'(722'),
a+i+k ≤
200m(220m)/656'(722')
Installing only with
distribution header
a+i ≤
200m(220m)/656'(722')
Total length
of pipe (m)
1000m
(3281') 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 (3281')
Installing only with
distribution header
a+b+c+d+e+f+g+h+i ≤
1000m (3281')
Outdoor unit
~ Outdoor
unit (Module
installation)
Pipe length
10m (33') or
less
r ≤ 10m (33'), s ≤ 10m (33'), t ≤ 10m (33')
Equivalent
length
13m (43') or
less
r ≤ 13m (43'), s ≤ 13m (43'), t ≤ 13m (43')
