Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 69

[ II Restrictions ]
(2) Between BC controller and indoor unit (Parts a, b, c, d, and e)
Operation
Refrigerant pipe Liquid
size pipe
Gas
pipe
Connection to Liquid
outdoor unit pipe
(Flare connec-
Gas
tion for all mod-
pipe
els)
(3) Between main BC controller and sub BC controller (Part C)
Operation
Refrigerant pipe Liquid pipe
size
High-pres-
(Brazed connec-
sure gas
tion for all mod-
pipe
els)
Low-pres-
sure gas
pipe
Select the proper size pipes for the main BC controller based on the total capacity of the indoor units that are connected
to both of the sub BC controllers, and for the sub BC controller, on the total capacity of the indoor units that are con-
nected to each sub BC controller.
(Note) Use the piping that is specified in Section "[3] Piping Materials" under "Read Before Servicing".
06,08,12,15,18 24,27,30,36,48
ø6.35 [1/4"]
ø12.7 [1/2"] ø15.88 [5/8"]
ø6.35 [1/4"]
ø12.7 [1/2"] ø15.88 [5/8"]
-P72
ø9.52 [3/8"]
ø15.88 [5/8"]
ø19.05 [3/4"]
- 60 -
Indoor unit
72
ø9.52 [3/8"]
ø19.05 [3/4"]
ø9.52 [3/8"]
ø19.05 [3/4"]
Indoor unit
P73-P108
ø19.05 [3/4"]
ø22.2 [7/8"] ø28.58 [1-1/8"]
Unit: mm [in]
96
ø22.2 [7/8"]
ø22.2 [7/8"]
Unit: mm [in]
P109-P126
ø12.7 [1/2"]