Mitsubishi Electric CITY MULTI PUMY-P48NKMU4 Data Book page 57

11. PIPING DESIGN
Branch box Method
Connection Examples
(Connecting to 8 Indoor Units)
Total piping length
Farthest piping length (L)
Permissible
length Piping length between outdoor unit and branch boxes
(One-way)
Farthest piping length after branch box (I)
Total piping length between branch boxes and indoor units
In indoor/outdoor section (H)
Permissible
height
di erence
(One-way)
Number of bends
Branch box should be placed within the level between the outdoor unit and indoor units.
Select Each Section of Refrigerant
Piping
to Branch box (A, B, C)
to Indoor Unit (a to h)
Select the size from the table to the
right.
Additional refrigerant charge
M-P0891A
A
B
H H
h
h
Model
Each
Piping
Indoor unit series
M series or
P series
Indoor units which connected are all of A-COIL type (PAA-A).
To
When connecting a PAA-series unit(s). set additional constraints on the amount of additional
refrigerant as follow.
Number of connecting PAA-A A
A
Outdoor unit
B Branching joint
C Branch box
Indoor unit
D
L
A
B
C
C C
h h
a b c f
d e g
D D
D D D
D
D
A
A
A
(In the case of that outdoor unit is set higher than indoor unit)
(In the case of that outdoor unit is set lower than indoor unit)
)
Liquid Line
Gas Line
Liquid Line
Gas Line
Model number A
ed gas piping diagram size shall be increased by one size.
S-Series
l
h
D
) B )
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