54
Refrigerant pipe installation
Allowable length of the refrigerant pipe and the installation examples
C/O
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')
Maximum
allowable
height
difference of
pipe
Outdoor unit ~
Indoor unit
110/110m (361'/361')
Note 2)
H1 ≤ 110/110m(361’/361’)
Indoor unit ~
Indoor unit
50m(164’) or less H2 ≤ 50m(164’)
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