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Installation Manual
EN-29
EN-30
Selection of refrigerant piping
No.
Piping parts
Name
Selection of pipe size
Remarks
(1)
Outdoor unit
È
1st branching
section
Main pipe
Size of main pipe
Same as connecting
pipe size of the outdoor
unit.
(2)
Branching section
È
Branching section
Branching
pipe
Pipe size between branching sections
Pipe size differs based
on the total capacity
code value of indoor
units at the downstream
side. If the total value
exceeds the capacity
code of the outdoor unit,
apply the capacity code
of the outdoor unit. (See
Table 1 and 2.)
(5)
(2)
(4)
(1)
(3)
(3)
(3)
(3)
(2)
(4)
(3)
(3)
Outdoor unit
Liquid pipe
Gas pipe
Main pipe
1st branching
section
Branching
pipe
Branching
header
Indoor
unit
Indoor
unit
Branching
pipe
Y-shaped
branching joint
Outdoor unit capacity type
Gas pipe
Liquid pipe
0406 type
15.88
9.52
0506 type
15.88
9.52
Total capacity codes of
indoor units at down stream
side
Gas pipe
Liquid pipe
Equivalent to
HP
Equivalent to
capacity
Below 2.4
Below 6.6
12.70
9.52
2.4 to below
6.4
6.6 to below
18.0
15.88
9.52
6.4 or more
18.0 or more
19.05
9.52
(3)
Branching section
È
Indoor unit
Indoor unit
connecting
pipe
Connecting pipe size of indoor unit
(4)
Branching section
Y-shaped
branching
joint
Selection of branching section (Y-shaped branching joint)
(5)
Branching section
Branching
header
Selection of branching section (Branching header)
Capacity rank
Gas pipe
Liquid pipe
005 to 012 type
9.52
6.35
014 to 018 type
12.70
6.35
020 to 056 type
15.88
9.52
Model name
Y-shape branch joint
RBM-BY55E
Model name
Branching header
For 4 branches RBM-HY1043E
For 8 branches RBM-HY1083E
1FAN_IM_DHV0100301-00_EN.book Page 15 Saturday, November 4, 2017 2:39 PM