Mitsubishi Electric PUHY-P200 Service Handbook page 38

2. Header branching system
Total piping length
Length Farthest piping length (L)
Farthest piping length after first branch (
Height
Indoor – Outdoor
difference
Indoor – Indoor
3. Mixed line and header branching system
Outdoor unit
A
First branch
(Branch joint)
Total piping length
Length Farthest piping length (L)
Farthest piping length after first branch (
Indoor – Outdoor
Height
difference
Indoor – Indoor
Outdoor unit
Note: The branch piping can not be branched again after header branching.
A
First branch
a
c
b
Indoor Indoor
Indoor Indoor Indoor
1 2
3
Item
Upper outdoor unit
Lower outdoor unit
C
c
B
Indoor
3
a
Branch joint
Indoor
1
Item
Upper outdoor unit
Lower outdoor unit
L
Cap
e
d f
4 5
Indoor
6
Piping section
A + a + b + c + d + e + f
A + f
) f
H
H'
h
A
Note: The total model names downstream in the table below
represent that viewed from A-point in the above figure.
Branch header
e Cap
d
Indoor Indoor
4 5
L
b
Indoor
2
Piping section
A + B + C + a + b + c + d + e
A + B + b
) B + b
H
H'
h
- 36 -
Allowable value
Less than 300m
Less than 150m
Less than 40m
Less than 50m
Less than 40m
Less than 15m
To downstream unit
Note: The branch piping can not be branched
again after header branching.
Allowable value
Less than 300m
Less than 150m
Less than 40m
Less than 50m
Less than 40m
Less than 15m