Table of Contents
[2-10 Restrictions on Refrigerant Pipes ]
2-10 Restrictions on Refrigerant Pipes
2-10-1
Restrictions on Refrigerant Pipe Length
(1) System that requires 16 BC controller ports or fewer
troller>
Outdoor unit
H
H'
h1
Length
Total pipe length
Total pipe length from the outdoor unit to
the farthest indoor unit
Between outdoor unit and BC controller
Between BC controller and indoor unit
Height
difference Between indoor
and outdoor units
Between indoor unit and BC controller
Between indoor units
*1. When the total piping length between the BC controller and indoor units (P250 model excluded) exceeds 40 m [131
ft], observe the restrictions on the vertical separation and piping length below.
*2. When the capacity of the connected indoor units is P200 or above, use the figures in the parentheses as a reference.
1) To connect the P100 through P140 models of indoor units, use an optional junction pipe kit (Model: CMY-R160-J1) and merge
the two ports before connecting them. (In that case, set DIP SW4-6 on the BC controller to ON.)
It is also possible to connect the P100 through P140 models of units to a port, although the cooling performance will somewhat
decrease. (In that case, set DIP SW4-6 on the BC controller to OFF.)
(The factory setting for DIP SW4-6 is OFF. )
2) Do not connect the P200 or P250 models of indoor units and other models of indoor units at the same port.
3) Group the indoor units together that connected to the same port if multiple indoor units are connected to the same port on BC
controller. Also share one thermo-stat such as on remote controller so that they turn on/off at the same time.
HWE1314A
A
BC controller
Reducer (P15 - P50 models)
(Supplied with the BC Controller)
a
Junction pipe
(CMY-R160-J1)
Indoor
(P15 - P80 models)
Operation
Outdoor unit above
indoor unit
Outdoor unit below
indoor unit
*Use a main BC controller when connecting the outdoor units of
P400, EP400 models or above.
Branch joint
(CMY-Y102S-G2)
B
b
c
Indoor
Indoor
Maximum of 3 units per port
(P100 - P250 models)
Total capacity of P80 or below
Pipe sections
A+B+a+b+c+d
Refer to the restrictions on the total piping
A+B+d
A
B+d
H
H'
h1
h2
- 53 -
Indoor
d
h2
Allowable length of pipes
length.
165 [541] or less
(Equivalent length 190 [623] 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
Unit: m [ft]
GB
Chapters
Table of Contents
Troubleshooting
