Mitsubishi Electric City Multi CMH-WM250V-A, Service Handbook

Page: 52 / 436

[2-7 Example System with an MA Remote Controller ]
BS_02_E
chapter 2 -
15
2
Rest
rict
io
ns
2-7-3 Grouped Operation of Units in Separate Refrigerant Circuits
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller can not
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) 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 performed only on one of the outdoor units.
5) Provide grounding to S terminal on the terminal block for
transmission line for centralized control (TB7) on only
one of the outdoor units.
6) A transmission booster is required in a system to which
more than 32 indoor units (26 units if one or more indoor
units of the 200 model or above is connected) are con-
nected.

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
2
[AWG16] or larger)
L11+L12 200m [656ft]
L21+L22 200m [656ft]
2) Transmission line for centralized control
L21+L31 200m [656ft]
3) MA remote controller wiring
Same as 2-7-1
4) Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or larger)
L12(L11)+L31+L22(L21) 1000 m [3280ft] (500 m
[1640ft])
*1
*1 If a given system includes one or more unit or remote
controller that does not support the maximum allow-
able cable distance of 1,000 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 1,000 m [3280 ft].
IC
TB5
S
TB15
1 2
01
IC
TB5
S
TB15
1 2
03
A B
MA
A B
MA
LC
TB5
S
07
IC
TB5
S 1 2
TB15
IC
TB5
S
TB15
1 2 1 2
04 02
IC
TB5 TB15
S
05
A B
MA
IC
TB5
S
TB15
1 2
06
A B
MA
Group
Group
Group
Group
M1 M2 M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2
m2
m3
m1
m4
Interlock operation with
the ventilation unit
L12
L22
L11
L21
OC
TB3
TB7
S
51
To be connected
HU
TB3
52
M1 M2 S M1 M2
M1 M2
OC
TB3
TB7
S
54
HU
TB3
55
M1 M2 S M1 M2
M1 M2
L31
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
SW5-1 OFF
Move the male connector
from CN41 to CN40.
To be left
unconnected
m5
0000004972.BOOK 15 ページ ２０１９年５月８日 水曜日 午後２時４８分