Single Refrigerant System With Two Or More Lossnay Units - Mitsubishi Electric HP120TNU-A Service Handbook

[2-7 Example System with an MA Remote Controller ]
2-7-2

Single Refrigerant System with Two or More LOSSNAY Units

(1) Sample control wiring
L1
Leave the male Leave the male
connector on connector on
CN41 as it is. CN41 as it is.
SW5-1 OFF
SW5-1 OFF
OS
52
TB3 TB7
M1 M2
M1 M2 M1 M2 S
(2) Cautions
1) ME 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) When the number of the connected indoor units is as shown in
the table below, one or more transmission boosters (sold sepa-
rately) 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.)
When the P72 and P96 models are
not included in the connected indoor
units
When the P72 and P96 models are
included in the connected indoor
units
The table above shows the number of transmission boost-
HWE18220_GB
L3
L2
OC BC
51 53
TB02
TB3 TB7
M1 M2 S M1 M2 S
M1 M2 S
TB02
57
BS
* If the BC address overlaps any of the addresses that are assigned to either the OC, OS, or BS, use a different, unused address.
OC, OS, and BS addresses (lowest indoor unit address in the group plus +50) have higher priority than the BS address.
Number of transmission booster
(sold separately) required
1 unit 2 units
27 - 50 units -
21 - 39 units 40 - 50 units
Interlock operation with the ventilation unit
L4
Group Group
IC
01
TB5 TB15 TB5
M1M2 M1M2
S 1 2 S
A1 B2
MA
L12
Group
IC IC
03 04
TB5 TB15 TB5
M1M2 S 1 2 M1M2 S
A1 B2
MA
m3
IC IC
07 08
TB5 TB15 TB5
M1M2 M1M2
S 1 2 S
A1 B2
MA
ers that is required by the system with three BC controllers.
For each BC 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
Same as 2-7-1
2) Transmission line for centralized control
No connection is required.
3) MA remote controller wiring
Same as 2-7-1
L5
LC
IC
02 05
TB15 TB5
M1M2
1 2 S
A1 B2
MA
L13
LC
06
TB15 TB5
1 2 M1M2 S
TB15
1 2
A1 B2
MA
chapter 2 -
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