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5
REFRIGERANT PIPING
No.
Piping parts
Name
Outdoor unit
Outdoor unit
↓
connecting pipe
T-shape
branching joint
‚
Between T-shape
Main connecting
branching joints
piping between of
outdoor units
‡
Balance pipe
ƒ
T-shape joint of
Main piping
header unit
↓
1st branching
section
„
Branching section
Branching pipe
↓
Branching section
…
Branching section
Indoor unit
↓
connecting pipe
Indoor unit
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Selection of pipe size
1) Connecting pipe outdoor unit
Model
MMY-MAP0501H
MMY-MAP0601H
MMY-MAP0801H
MMY-MAP1001H
MMY-MAP1201H
2) Pipe size for connecting piping between outdoor units
Total capacity codes of outdoor
units at downstream side
Equivalent
Equivalent
to capacity
to HP
Below 38.4
Below 14
38.4 to below 61.5
14 to below 22
61.5 to below 73.0
22 to below 26
73.0 to below 96.0
26 to below 36
Above 101.0
Above 36
3) Size of main piping
Total capacity codes of all outdoor units
Equivalent
Equivalent
to capacity
Below 16.0
Below 6
16.0 to below 22.4
6 to below 8
22.4 to below 33.5
8 to below 12
33.5 to below 38.4
12 to below 14
38.4 to below 61.5
14 to below 22
61.5 to below 73.0
22 to below 26
73.0 to below 101.0
26 to below 36
101.0 to below 118.0
36 to below 46
Above 118.0
Above 46
∗ Max. equivalent length of main pipe is below 70m.
4) Pipe size between branching sections
Total capacity codes of indoor units
at downstream side
Equivalent
Equivalent
to capacity
Below 7.5
7.5 to below 18.0
2.8 to below 6.4
18.0 to below 34.0
6.4 to below 12.2
34.0 to below 56.5
12.2 to below 20.2
∗
56.5 to below 70.5
20.2 to below 25.2
1
70.5 to below 98.5
25.2 to below 35.2
98.5 to below 118.5
35.2 to below 42.2
Above 118.5
Above 42.2
∗1: If exceeding the main pipe size, decide the size same to
main pipe size.
5) Connecting pipe size of indoor unit
Capacity rank
007 to 012 type (15m or less)
007 to 012 type (15m or more)
015 to 018 type
024 to 048 type
056 type
072 type
096 type
13
Gas side
Liquid side
Ø15.9
Ø9.5
Ø19.1
Ø9.5
Ø22.2
Ø12.7
Ø22.2
Ø12.7
Ø28.6
Ø12.7
‡
Gas
Liquid
Balance
side
side
pipe
Ø28.6
Ø12.7
Ø28.6
Ø15.9
Ø9.5
Ø34.9
Ø15.9
Ø34.9
Ø19.1
Ø41.3
Ø22.2
Gas side
Liquid side
to HP
Ø15.9
Ø9.5
Ø19.1
Ø9.5
Ø22.2
Ø12.7
Ø28.6
Ø12.7
Ø28.6
Ø15.9
Ø34.9
Ø15.9
Ø34.9
Ø19.1
Ø41.3
Ø22.2
Ø41.3∗
Ø22.2
Gas side
Liquid side
to HP
Below 2.8
Ø12.7
Ø9.5
Ø15.9
Ø9.5
Ø22.2
Ø12.7
Ø28.6
Ø15.9
Ø34.9
Ø15.9
Ø34.9
Ø19.1
Ø41.3
Ø22.2
Ø41.3
Ø22.2
Gas side
Liquid side
Ø9.5
Ø6.4
Ø12.7
Ø6.4
Ø12.7
Ø6.4
Ø15.9
Ø9.5
Ø15.9
Ø9.5
Ø19.1
Ø12.7
Ø22.2
Ø12.7
Remarks
Same to connecting pipe
size of outdoor unit
Pipe size differs based on
total capacity code value of
outdoor units at
downstream side.
(See Table 2.)
Pipe size differs based on
capacity code of outdoor
unit.
(See Table 2.)
Pipe size differs based on
total capacity code value of
indoor units at downstream
side.
If the total value exceeds
the capacity code of the
outdoor unit, apply capacity
code of the outdoor unit.
(See Table 1.2.)
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