Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 76

[ II Restrictions ]
(3) System that requires more than 16 BC controller ports or with multiple BC controllers <Heat source unit P144 model
or above>
1
Heat source unit
Heat source unit
h4
F
H H'
Reducer (P06 - P18 models)
(Supplied with the BC Controller)
h1
Operation
Length Total pipe length
Total pipe length from the heat
source unit to the farthest in-
door unit
Between heat source unit and
BC controller
Between BC controller and in-
door unit
Between heat source units
Height
differ-
Between indoor
ence
and heat source
units
Between indoor unit and BC
controller
Between indoor units
Between the BC controller
(main or sub) and the sub BC
controller
Between heat source units
*1. When the overall pipe length between the BC controller and the farthest indoor unit exceeds 40m [131ft], observe
the restrictions in the figure titled "Restrictions on pipe length" below (except the P96 model).
*2. When the capacity of the connected indoor units is P72 or above, use the figures in the parentheses as a reference.
HWE15150
Heat source unit Twinning kit
2
CMY-Q100CBK2 : P144-P240
CMY-Q200CBK : P288-P336
On the low-pressure side, the twinning kit connects to the pipes on site inside the heat source unit.
When different capacity units are combined, connect the kit to the larger capacity heat source unit.
G
A
BC controller (main)
a Junction pipe
b
(CMY-R160C-J)
Indoor Indoor
(P06 - P54 models) (P72 or P96 model)
F+G+A+B+C+D+E+a+b+c+d+e
Heat source
unit above
indoor unit
Heat source
unit below
indoor unit
Twinning kit
(CMY-Y202S-G2)
(CMY-Y102LS-G2)
(CMY-Y102SS-G2)
D
C
Twinning kit
(CMY-Y102SS-G2)
E
B
c d
Indoor Indoor
Maximum of 3 units per port
Total capacity of P54 or below
Pipe sections
Refer to the restrictions on the total pip-
+f ing length in the graph on the next page.
F(G)+A+C+E+f
(Equivalent length 190 [623] or less)
F(G)+A
B+d or C+D+e
or C+E+f
F+G
H
H'
h1
h2
h3
h4
- 67 -
Indoor
e
h1
BC controller (sub)
h3
BC controller (sub)
h2
f
h1
Indoor
Unit: m [ft]
Allowable length of pipes
165 [541] or less
110 [360] or less
*1
40 [131] or less
5 [16] or less
50 [164] or less
40 [131] or less
*2
15 [49](10[32]) or less
*2
15 [49](10[32]) or less
15 [49] or less
0.1 [0.3] or less
GB