Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 35

[ II Restrictions ]
2. An example of a system with one outdoor unit to which 2 or more LOSSNAY units are connected
(manual address setup for both indoor and outdoor units)
In the case of Y
In the case of R2
OC
51
TB7 TB3
M1M2 S M1M2
*1 BC and BS are found only in the R2 system.
Don'ts
1. M-NET remote controller and MA remote controller cannot
both be connected to the same group of indoor units.
2. No more than 2 MA remote controllers can be connected to
a group of indoor units.
3. A transmission booster must be connected to a system to
which more than 26 indoor units including one or more in-
door units of 72 model or above are connected.
Sample control wiring
L2
Group
OC
IC
51
01
TB3 TB5
TB7
M1M2
M1M2 S M1M2 S
L1 L2
*1 BC
52
TB02
Group
M1M2 S
IC
03
TB5
M1M2 S
M1M2 S
TB02
53
*1 BS
L3 L4
Group
IC
02
TB15 TB5 TB15
1 2 M1M2 S 1 2
A1 B2 A1 B2
MA MA
L12 L13
IC
04
TB15 TB5 TB15
1 2 M1M2 S 1 2
A1 B2
MA
Maximum allowable length
(1) Indoor/outdoor transmission line
Same as [4] 1.
(2) Transmission line for centralized control
No connection is required.
(3) MA remote controller wiring
Same as [4] 1.
- 26 -
Interlock operation with
the ventilation unit
LC
05
TB5
M1M2 S
*2 LC
06
TB5
M1M2 S