System That Requires More Than 16 Bc Controller Ports - Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook

[ II Restrictions ]
(2) System that requires more than 16 BC controller ports or with multiple BC controllers <Heat source unit P120 model
or below>
Heat source unit
H H'
Reducer (P06 - P18 models)
(Supplied with the BC Controller)
h1
(P06 - P54 models)
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
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
*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.
HWE09080
A
BC controller (main)
C
Branch joint
(CMY-Y102S-G2)
B
Junction pipe
a
b
(CMY-R160-J)
Indoor Indoor
(P72 or P96 model)
Maximum of 3 units per port
Total capacity of P54 or below
Pipe sections
A+B+C+D+E+a+b+c+d+e+f
B+d or C+D+e
Heat source
unit above
indoor unit
Heat source
unit below
indoor unit
- 64 -
Branch joint
(CMY-Y202-G2)
(CMY-Y102L-G2)
(CMY-Y102S-G2)
BC controller (sub)
D
BC controller (sub)
E
d
c
Indoor Indoor
Refer to the restrictions on the total pip-
ing length in the graphon the next page.
A+C+E+f
(Equivalent length 190 [623] or less)
A
or C+E+f
H
H'
h1
h2
h3
Indoor
e
h1
h3
h2
f h1
Indoor
Unit: m [ft]
Allowable length of pipes
165 [541] or less
110 [360] or less
*1
40 [131] 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
GB