Mitsubishi Electric City Multi PURY-P72TNU-A-BS Manuel D'installation page 19

(2) The distance between the unit bottom and the pipe (H) must be 0.2 m (7-7/8 in) or below. In the figure on the right, because the distance is
more than 0.2 m (7-7/8 in), the oil accumulates in Unit 1 when Unit 2 is in operation and Unit 1 is stopped.
Unit 1 Unit 2
Ⓐ
Unit 1 Unit 2
Ⓐ
H
H ≤ 0.2 m (7-7/8 in)
(3) The vertical separation between units (H) must be 0.1 m (3-15/16 in) or below. In the figure on the right, because the distance is more than
0.1 m (3-15/16 in), the oil accumulates in Unit 1 when Unit 2 is in operation and Unit 1 is stopped.
Unit 2
Unit 1 Unit 1
Ⓐ
H
H ≤ 0.1 m (3-15/16 in)
(4) The vertical separation between units (H) must be 0.1 m (3-15/16 in) or below. In the figure on the right, because the distance is more than
0.1 m (3-15/16 in), the oil accumulates in Unit 2 when Unit 1 is in operation and Unit 2 is stopped.
Unit 1 Unit 1
Unit 2
H
Ⓐ
H ≤ 0.1 m (3-15/16 in)
・Make sure that the inclination tolerance of the Twinning Kit is ±15˚ to the ground to avoid unit damage.
Ⓐ
・Restriction on installing the 2-Branch Joint Pipe CMY-R201/202/203/204/205S-G on the high-pressure piping, low-pressure piping, and liquid
piping.
To main BC controller
- - Regarding the 2-Branch Joint Pipe 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
WT09106X03
Unit 1
Ⓐ
H
H > 0.2 m (7-7/8 in)
Unit 1
Ⓐ
Unit 1
Ⓐ
H
Ⓐ Twinning Kit
To sub BC controller
C
A
B
To sub BC controller
Ⓐ
Unit 2
Unit 2
H
H > 0.1 m (3-15/16 in)
Unit 2
H > 0.1 m (3-15/16 in)
Ⓑ
Ⓐ
Ⓒ
≤ 2 m (6 ft)
GB-17