Mitsubishi Electric CMB-WM108V-AA Service Handbook page 56

[ II Restrictions ]
-5- System with a Connection of System Controller to Indoor-Outdoor Transmission Line
(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) A maximum of three system controllers can be connected to the in-
door-outdoor transmission line. (AE-200, AE-50, EW-50, AT-50B,
AG-150A, GB-50ADA, or G(B)-50A are not connectable.)
7) When the total number of indoor units exceeds 20 (12 if one or more
indoor units of the 200 model or above is connected), it may not be
possible to connect a system controller to the indoor-outdoor trans-
mission line.
8) 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
CN41 CN40 Replace
SW5-1 OFF ON
OC HB
51 53
TB3 TB02
M1 M2
M1 M2 S
TB7
M1 M2 S
Connect
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
OC HB
55 57
TB3 TB02
M1 M2 M1 M2 S
TB7
M1 M2 S
Not Note1
Connect
System controller
A B S
2 units
–
System with a Connection of System Controller to Indoor-Outdoor Transmission Line
L12
Group Group
IC IC
01 02
TB5 TB15 TB5 TB15
M1 M2 M1 M2
S 1 2 S 1 2
A B A B
1 2 1 2
MA MA
L22
Group
IC IC
04 05
TB5 TB5 TB15
TB15
M1 M2 S 1 2 M1 M2 S 1 2
A B
1 2
MA
m3
Note1 LM adapters cannot be connected to the
indoor-outdoor transmission line.
The left table shows the number of transmission boosters that is re-
quired by the system with four HBC controllers. For each HBC con-
troller 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]
L25 200m [656ft]
*If the power-supply distance exceeds the distance limit of 200 me-
ters, 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
L25+L31+L12
L12+L31+L22
*1 If a given system includes one or more unit or remote controller
that does not support the maximum allowable 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 in-
formation on which units and remote controllers support the max-
imum allowable cable distance of 1000 m [3280 ft].
- 47 - 47
Interlock operation with
the ventilation unit
Group
LC
IC
03 07
TB5 TB15 TB5
M1 M2 S 1 2 M1 M2 S
A B
1 2
MA
Group
LC
IC
06 08
TB5
TB5 TB15
M1 M2 S
M1 M2 S 1 2
A B
1 2
MA
2
[AWG16] or larger)
2
[AWG16] or larger)
1000 m [3280ft] (500 m [1640ft])
1000 m [3280ft] (500 m [1640ft])
*1
*1
GB