Mitsubishi Electric CMB-WM108V-AA Service Handbook page 52

[ II Restrictions ]
-3- Grouped Operation of Units in Separate Refrigerant Circuits
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller cannot both be con-
nected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected to a group
of indoor units.
When a PAR-CT01MA series, PAR-4"x"MA series, or PAR-3"x"MA
series ("X" represents 0 or later) is connected to a group, no other
MA remote controllers can be connected to the same group.
3) Do not connect the terminal blocks (TB5) on the indoor units that are
connected to different outdoor units with each other.
4) Replacement of male power jumper connector (CN41) must be per-
formed only on one of the outdoor units (not required if power to the
transmission line for centralized control is supplied from a controller
with a power supply function, such as GB-50ADA).
5) Provide grounding to S terminal on the terminal block for transmis-
sion line for centralized control (TB7) on only one of the outdoor
units.
6) When the number of the connected indoor units is as shown in the
table below, one or more transmission boosters (sold separately)
are required.
To connect two transmission boosters, connect them in parallel.
(Observe the maximum number of connectable indoor units that are
listed in the specifications for each outdoor unit.)
Number of transmission booster (sold separately) required
1 unit
25 - 50 units
HWE1708A
Move the male connector
from CN41 to CN40.
SW5-1 OFF
OC HB
51 53
TB3 TB02
M1 M2
M1 M2 S
TB7
M1 M2 S
To be connected
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
OC HB
55 57
TB3 TB02
M1 M2 M1 M2 S
TB7
M1 M2 S
To be left
unconnected
2 units
–
Grouped Operation of Units in Separate Refrigerant Circuits
L12
Group Group
IC IC
01 03
TB5 TB15 TB5 TB15
M1 M2 S M1 M2 S
1 2
A1 B2 A1 B2
MA
L22
Group
IC IC
02 04
TB5 TB5
TB15
M1 M2 S S
1 2 M1 M2
The left table shows the number of transmission boost-
ers that is required by the system with four HBC control-
lers. For each HBC controller added or subtracted,
subtract or add two indoor units.
Refer to the DATABOOK for further information about
how many booster units are required for a given system.
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
L12 200m [656ft]
L22 200m [656ft]
*If the power-supply distance exceeds the distance limit
of 200 meters, a transmission booster (PAC-SF46EPA-
G) is required.
2) Transmission line for centralized control
L31 200m [656ft]
3) MA remote controller wiring
Same as [7] -1-
4) Maximum line distance via outdoor unit
(1.25mm
L12+L31+L22 1000 m [3280ft] (500 m [1640ft])
*1 If a given system includes one or more unit or remote
controller that does not support the maximum allow-
able cable distance of 1000 m [3280 ft], the maximum
allowable cable distance in the system will be 500 m
[1640 ft]. Refer to the latest catalog for information on
which units and remote controllers support the maxi-
mum allowable cable distance of 1000 m [3280 ft].
- 43 - 43
Interlock operation with
the ventilation unit
Group
IC
06
TB5 TB15 TB5
M1 M2 S M1 M2
1 2 1 2
A1 B2
MA MA
IC
05
TB15 TB5 TB15
M1 M2 S
1 2 1 2
A1 B2
MA
m5
2
[AWG16] or larger)
2
[AWG16] or larger)
LC
07
S
*1
GB