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46
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)
200 m
(656') and
below
[220 m
(722') and
below]
Installing only with
Y-joint
a+b+c+d+e+f+g+p ≤
200 m(220 m)/656'(722')
Equivalent
length Y-joint:
0.5 m (1.64'),
Distribution
header: 1 m
(3.28')
Installing with Y-joint
and distribution
header
a+b+h ≤
200 m(220 m)/656'(722'),
a+i+k ≤
200 m(220 m)/656'(722')
Installing only with
distribution header
a+i ≤
200 m(220 m)/656'(722')
Total length
of pipe (m)
1000 m
(3281') or
less
Installing only with
Y-joint
a+b+c+d+e+f+g+h+i+
j+k+l+m+n+p ≤ 1000 m
Installing with Y-joint
and distribution
header
a+b+c+d+e+f+g+h+i+j+k
≤ 1000 m (3281')
Installing only with
distribution header
a+b+c+d+e+f+g+h+i ≤
1000 m (3281')
Outdoor unit
~ Outdoor
unit (Module
installation)
Pipe length
10 m (33')
or less
x ≤ 10 m (33'), y ≤ 10 m (33'), z ≤ 10 m (33')
Equivalent
length
13 m (43')
or less
x ≤ 13 m (43'), y ≤ 13 m (43'), z ≤ 13 m (43')
Maximum
allowable
height
difference of
pipe
Outdoor unit ~
Indoor unit
110/110 m(361'/361')
Note 2)
H1 ≤ 110/110 m(361'/361')
Indoor unit ~
Indoor unit
50 m (164')
H2 ≤ 50 m (164')
But, when AM
✴✴✴
HNQDC
✴
is installed, H2 is 15 m(49') or less.
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