Installation manual

[ II Restrictions ]
- 51 -
HWE10050 GB
(3) System that requires more than 16 BC controller ports or with multiple BC controllers <System with two outdoor
units>
1) A system that requires more than 16 BC controller ports requires two or three BC controllers (main and sub), and three pipes
will be used between the main and the sub BC controllers.
2) When connecting two sub BC controllers, observe the maximum allowable length in the table above.
3) When connecting two sub BC controllers, install them in parallel.
4) 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.)
5) Do not connect the P200 or P250 models of indoor units and other models of indoor units at the same port.
6) All the units that are connected to the same ports can only be operated in the same operation mode (cooling/heating).
h1
h3
h1
h2
f
D
E
e
Outdoor Twinning kit (High/Low press.)
CMY-R100VBK: Outdoor unit P400(-A1) - P650/EP400 - EP600(-A)
CMY-R200VBK: Outdoor unit P700 - P800(-A)
CMY-R100XLVBK: Outdoor unit P800(-A1)/EP600(-A1) - EP700
CMY-R200XLVBK: Outdoor unit P850 - P900
On the low-pressure side, the twinning kit connects to the pipes on site inside the outdoor unit.
When different capacity units are combined, connect the kit to the larger capacity outdoor unit.
a
C
b
B
cd
A
G
F
h4
Outdoor unit 1
Outdoor unit 2
HH'
h1
BC controller (main)
Indoor Indoor Indoor Indoor
Indoor
Indoor
BC controller (sub)
BC controller (sub)
Branch joint
(CMY-Y202-G2)
(CMY-Y102L-G2)
(CMY-Y102S-G2)
Branch joint
( CMY-Y102S-G2)
(P15 - P80 models) (P100 - P250 models)
Maximum of 3 units per port
Total capacity of P80 or below
Reducer (P15 - P50 models)
(Supplied with the BC Controller)
Junction pipe
(CMY-R160-J1)
Unit: m [ft]
Operation Pipe sections Allowable length of pipes
Length Total pipe length F+G+A+B+C+D+E+a+b+
c+d+e+f
Refer to the restrictions on the total pip-
ing length.(page 52)
Total pipe length from the outdoor unit to
the farthest indoor unit
F(G)+A+C+E+f 165 [541] or less
(Equivalent length 190 [623] or less)
Between outdoor unit and BC controller F(G)+A 110 [360] or less
Between BC controller and indoor unit B+d or C+D+e
or C+E+f
40 [131] or less
*1
Between indoor units F+G 5 [16] or less
Height
differ-
ence
Between indoor
and outdoor
units
Outdoor unit above
indoor unit
H 50 [164] or less
Outdoor unit below in-
door unit
H' 40 [131] or less
Between indoor unit and BC controller h1 15 [49](10[32]) or less
*2
Between indoor units h2 15 [49](10[32]) or less
*2
Between the BC controller (main or sub)
and the sub BC controller
h3 15 [49] or less
Between outdoor units h4 0.1 [0.3] or less
*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 on the next page.
*2. When the capacity of the connected indoor units is P200 or above, use the figures in the parentheses as a reference.