Mitsubishi Electric PQHY-P120THMU-A, Service Handbook

Page: 71 / 414

[
II
Restrictions ]
- 62 - HWE09080 GB
(1) System that requires 16 BC controller ports or fewer <System with only the main BC controller or standard BC con-
troller> <PQRY>
Unit: m [ft]
Operation Pipe sections Allowable length of pipes
Length Total pipe length A+B+a+b+c+d Refer to the restrictions on the total piping
length in the graph on the next page.
Total pipe length from the heat source
unit to the farthest indoor unit A+B+d 165 [541] or less
(Equivalent length 190 [623] or less)
Between heat source unit and BC con-
troller A 110 [360] or less
Between BC controller and indoor unit B+d 40 [131] or less
*1
*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).
Height
difference
Between indoor
and heat source
units
Heat source unit
above indoor unit H 50 [164] or less
Heat source unit
below indoor unit H' 40 [131] or less
Between indoor unit and BC controller h1 15[49](10[32]) or less
*2
*2. When the capacity of the connected indoor units is P72 or above, use the figures in the parentheses as a reference.
Between indoor units h2 15[49](10[32]) or less
*2
a
b
H H'
h1
A
h2
Heat source unit
BC controller
Reducer (P06 - P18 models)
(Supplied with the BC Controller)
B
d
c
Junction pipe
(CMY-R160-J)
*Use a main BC controller when connecting the heat source units of
P144 model or above.
Branch joint
(CMY-Y102S-G2)
Indoor Indoor Indoor
Indoor
(P06 - P54 models) (P72 or P96 model)
Maximum of 3 units per port
Total capacity of P54 or below