Mitsubishi Electric CITY MULTI PURY-P-YNW-A2 Installation Manual page 23

・Restriction on installing the low-pressure pipe joint between outdoor units and sub BC
(for P-J type, P-JA type, P-KA type, and P-KB type)
To outdoor unit
- Regarding the low-pressure pipe joint between outdoor units and sub BC, A and B must be installed horizontally,
and C must be installed upward higher than the horizontal plane of A and B.
・Restriction on installing the 2-Branch Joint Pipe between main BC and sub BC on the high-pressure piping, low-
pressure piping, and liquid piping.
To main BC controller
- Regarding the 2-Branch Joint Pipe between main BC and sub BC on the high-pressure/low-pressure/liquid
piping, A and B must be installed horizontally, and C must be installed upward higher than the horizontal plane of
A and B.
・If the length of the pipe between the branching point and the outdoor unit exceeds 2 m (6 ft), provide a trap within 2
m (6 ft) from the branching point.
The trap must be at least 200 mm (7-7/8 in) in height. (high-pressure pipe only) If there is no trap, oil can
accumulate inside the pipe, causing a shortage of oil and may damage the compressor.
* Small dots in the figures indicate branching points.
2 m (6 ft)
Ⓐ To a BC controller
Ⓑ Trap (high-pressure pipe only)
High-pressure pipe
Ⓒ
WT09973X01
To sub BC controller
C
A
B
To sub BC controller
C
A
B
Ⓐ
To main BC controller
To sub BC controller
Ⓑ
Ⓐ
Ⓒ
≤ 2 m (6 ft)
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