Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 72

[ II Restrictions ]
(1) System that requires 16 BC controller ports or fewer <System with only the main BC controller or standard BC con-
troller> <PQRY>
Heat source unit
H H'
h1
Operation
Length Total pipe length
Total pipe length from the heat source
unit to the farthest indoor unit
Between heat source unit and BC con-
troller
Between BC controller and indoor unit
Height
difference Between indoor
and heat source
units
Between indoor unit and BC controller
Between indoor 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
A
BC controller
Reducer (P06 - P18 models)
(Supplied with the BC Controller)
a
Junction pipe
(CMY-R160C-J)
Indoor
(P06 - P54 models)
Heat source unit
above indoor unit
Heat source unit
below indoor unit
*Use a main BC controller when connecting the heat source units of
P144 model or above.
Twinning kit
(CMY-Y102SS-G2)
B
b
c
Indoor Indoor
Maximum of 3 units per port
(P72 or P96 model)
Total capacity of P54 or below
Pipe sections
A+B+a+b+c+d Refer to the restrictions on the total piping
length in the graph on the next page.
A+B+d
(Equivalent length 190 [623] or less)
A
B+d
H
H'
h1
h2
- 63 -
Indoor
d
h2
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
GB