Mitsubishi Electric CITY MULTI PUHY-P-TJMU-A Manuel D'installation page 9

A
Unit combination
Outdoor
model Unit 1 Unit 2
- -
P72
- -
P96
- -
P120
- -
P144
P168 P96
P72
P192 P120 P72
P216 P96
P120
P240 P120 P120
P264
P144 P120
P144
P288 P144
P120
P120
P312
P120
P120
P336
P144
P120
P360
*1 ø12.7 for over 90m [295 ft]
*2 ø12.7 for over 40m [131 ft]
*3 The pipe sizes listed in columns A1 to A3 in this table correspond to the sizes for the models listed in the unit 1, 2, and 3 columns. When the order of the models for
unit 1, 2, and 3 change, make sure to use the appropriate pipe size.
B, C, D
Total capacity of indoor units
~ 54
55 ~ 72
73 ~ 108
109 ~ 144
145 ~ 240
241 ~ 308
309 ~
a, b, c, d, e
Model number Liquid pipe
06, 08, 12, 15, 18 ø6.35 [1/4]
24, 27, 30, 36, 48, 54 ø9.52 [3/8]
72 ø9.52 [3/8]
96 ø9.52 [3/8]
Precautions for outdoor unit combinations
Refer to [Fig. 9.2.2] for the positioning of twinning pipes.
[Fig. 9.2.2]
<A> Make sure the pipes from the twinning pipe to the outdoor unit are sloped downwards (towards the twinning pipes).
A
F
<B> When the piping on the outdoor unit side (from the twinning pipe) exceeds 2 m [6 ft], ensure a trap (gas pipe only) within 2 m [6 ft].
Make sure the height of the trap is 200 mm [7-7/8 in] or more.
If there is no trap, oil can accumulate inside the pipe, causing a shortage of oil and may damage the compressor.
F
2 [ 6 ]
Caution:
• Do not install traps other than the ones between outdoor units described on a separate sheet to prevent oil backflow and compressor start-up failure.
• Do not install solenoid valves to prevent oil backflow and compressor start-up failure.
• Do not install a sight glass because it may show improper refrigerant flow.
If a sight glass is installed, inexperienced technicians that use the glass may overcharge the refrigerant.
A
Unit 3 Liquid pipe Gas pipe Liquid pipe
-
-
ø 9.52 [3/8] ø 19.05 [3/4]
- -
*1
ø 9.52 [3/8] ø22.2 [7/8]
- -
*2 ø 9.52 [3/8]
ø22.2 [7/8]
- -
ø12.7 [1/2] ø28.58 [1-1/8]
-
ø15.88 [5/8] ø28.58 [1-1/8] ø9.52 [3/8]
-
ø15.88 [5/8] ø28.58 [1-1/8] ø12.7 [1/2]
-
ø15.88 [5/8] ø28.58 [1-1/8] ø12.7 [1/2]
-
ø15.88 [5/8] ø28.58 [1-1/8] ø12.7 [1/2]
-
ø 19.05 [3/4] ø34.93 [1-3/8] ø12.7 [1/2]
- ø19.05 [3/4] ø34.93 [1-3/8] ø12.7 [1/2]
ø19.05 [3/4]
ø34.93 [1-3/8] ø12.7 [1/2]
P72
ø 19.05 [3/4]
P96 ø41.28 [1-5/8] ø12.7 [1/2]
ø 19.05 [3/4]
ø 12.7 [1/2]
P96 ø41.28 [1-5/8]
(Unit: mm [in])
Liquid pipe Gas pipe
ø9.52 [3/8] ø15.88 [5/8]
ø9.52 [3/8] ø19.05 [3/4]
ø9.52 [3/8] ø22.2 [7/8]
ø12.7 [1/2] ø28.58 [1-1/8]
ø15.88 [5/8] ø28.58 [1-1/8]
ø19.05 [3/4] ø34.93 [1-3/8]
ø19.05 [3/4] ø41.28 [1-5/8]
(Unit: mm [in])
Gas pipe
ø12.7 [1/2]
ø15.88 [5/8]
ø19.05 [3/4]
ø22.2 [7/8]
C
C
3 3
A1* A2*
Gas pipe Liquid pipe Gas pipe Liquid pipe
- -
-
- - -
- - -
- - -
ø22.2 [7/8] ø9.52 [3/8] ø19.05 [3/4]
ø22.2 [7/8] ø9.52 [3/8] ø19.05 [3/4]
ø22.2 [7/8] ø9.52 [3/8] ø22.2 [7/8]
ø22.2 [7/8] ø12.7 [1/2] ø22.2 [7/8]
ø28.58 [1-1/8] ø12.7 [1/2] ø22.2 [7/8]
ø28.58 [1-1/8] ø12.7 [1/2] ø28.58 [1-1/8]
ø12.7 [1/2] ø9.52 [3/8]
ø22.2 [7/8] ø22.2 [7/8]
ø22.2 [7/8] ø12.7 [1/2] ø22.2 [7/8]
ø9.52 [3/8]
ø 12.7 [1/2]
ø28.58 [1-1/8] ø22.2 [7/8] ø9.52 [3/8]
Downstream unit model total
~ 72
73 ~ 144
145 ~ 240
The 1st branch of P144 ~ P240
241 ~
The 1st branch of P264 ~ P360
4-Branch header 8-Branch header
(Downstream indoor (Downstream indoor
< =
unit model total 72) unit model total
CMY-Y104-G CMY-Y108-G
Outdoor model
P168 ~ P240
P264 ~ P288
P312 ~ P360
B
F
D
E
(Unit: mm [in])
3
A3* A4
Gas pipe Liquid pipe Gas pipe
- -
-
- - -
- - -
- - -
- -
-
- - -
- - -
- - -
- - -
- - -
ø19.05 [3/4] ø19.05 [3/4] ø34.93 [1-3/8]
ø22.2 [7/8] ø19.05 [3/4] ø34.93 [1-3/8]
ø19.05 [3/4] ø34.93 [1-3/8]
ø22.2 [7/8]
Joint
CMY-Y102S-G2
CMY-Y102L-G2
CMY-Y202-G2
CMY-Y302-G2
10-Branch header
(Downstream indoor
< = < =
144) unit model total 240)
CMY-Y1010-G
Outdoor Twinning Kit
CMY-Y100VBK2
CMY-Y200VBK2
CMY-Y300VBK2
C
(Unit: m [ft])
F
C
-
-
-
-
-
-
-
-
-
-
9