System With A Connection Of System Controller To Indoor-Outdoor Transmission Line - Mitsubishi Electric HP120TNU-A Service Handbook

[2-7 Example System with an MA Remote Controller ]
2-7-5 System with a Connection of System Controller to Indoor-Outdoor
Transmission Line
(1) Sample control wiring
L11
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
OS
52
TB3
M1 M2
TB7
M1 M2 S
Not
Connect
L21
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
OS
56
TB3
M1 M2
TB7
M1 M2 S
Not
Connect
(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.
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.
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, 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 72 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.)
When the P72 and P96 models are not
included in the connected indoor units
When the P72 and P96 models are in-
cluded in the connected indoor units
The table above shows the number of transmission boosters that is
HWE18220_GB
CN41 CN40 Replace
SW5-1 OFF ON
Group
OC BC
51 53
TB3 TB02 TB5
M1 M2 M1 M2 S M1 M2
S
TB7
M1 M2 S
Connect
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
OC BC Group
55 57
TB3 TB02
TB5
M1 M2 M1 M2 S
M1 M2 S
TB7
M1 M2 S
Note1
Not
Connect
System controller
A B S
Number of transmission boost-
er (sold separately) required
1 unit 2 units
27 - 50 units -
21 - 39 units 40 - 50 units
Interlock operation with
the ventilation unit
L12
Group Group
IC IC
01 02
TB15 TB5 TB15 TB5
M1 M2
1 2 S 1 2 M1
A B A B
1 2 1 2
MA MA
L22
Group
IC IC
04 05
TB5 TB15
TB15 TB5
1 2 M1 M2 S 1 2
M1 M2 S
A B
1 2
MA
m3
Note1 LM adapters cannot be connected to the
indoor-outdoor transmission line.
required by the system with three BC controllers. For each BC 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
L11+L12 200m [656ft]
L21+L22 200m [656ft]
L25 200m [656ft]
2) Transmission line for centralized control
L31+L21 200m [656ft]
3) MA remote controller wiring
Same as 2-7-1
4) Maximum line distance via outdoor unit
2
(1.25mm [AWG16] or larger)
L25+L31+L12(L11) 1000 m [3280ft] (500 m [1640ft])
L12(L11)+L31+L22(L21)
*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].
LC
IC
03 07
TB15 TB5
M2 S 1 2 M1 M2 S
A B
1 2
MA
LC
IC
06 08
TB5
TB15
M1 M2 S
1 2
A B
1 2
MA
2
[AWG16] or larger)
*1
*1
1000 m [3280ft] (500 m [1640ft])
chapter 2 -
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