Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 57

[ II Restrictions ]
11. A system with multiple BC controller connections (with a system controller connected to the centralized control line)
<PQRY>
(1) Sample control wiring
L11
Leave the male
Move the male connector
connector on from CN41 to CN40
CN41 as it is.
SW5-1 OFF ON
SW5-1 OFF ON
OS1 OC
52 51
TB3 TB3
M1M2 M1M2
TB7 TB7
S S
M1M2 M1M2
To be left
unconnected
To be connected
L21
Leave the male Leave the male
connector on connector on
CN41 as it is. CN41 as it is.
SW5-1 OFF ON SW5-1 OFF ON
OS1 OC
BC
55 54
TB3 TB3
M1M2 M1M2
TB7 TB7
M1M2 S M1M2 S
To be left
To be left
unconnected
unconnected
System
controller
A B S
(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 heat source units with each other.
4) Replacement of male power jumper connector (CN41) must be per-
formed only on one of the heat source units.
5) Short-circuit the S (shield) terminal of the terminal block for the cen-
tral control unit (TB7) and the ground terminal (
source unit whose power jumper was moved from CN41 to CN40.
6) 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 heat source unit.)
When the P72 and P96 models are not in-
cluded in the connected indoor units
When the P72 or P96 model is included in
the connected indoor units
The table above shows the number of transmission boost-
ers that is required by the system with three BC controllers.
For each BC controller that is subtracted from the above-
mentioned system, two additional indoor units can be con-
nected.
Refer to the DATABOOK for further information about how
many booster units are required for a given system.
7) When a power supply unit is connected to the transmission
line for centralized control, leave the power jumper connec-
tor on CN41 as it is (factory setting).
HWE15150
Group Group
BC
IC IC
2 1 1 2
01 02
53
TB02 TB5 TB15 TB5 TB15 TB5
M1M2 S
M1M2 S 1 2 M1M2 S 1 2 M1M2
m2
A1 B2
MA
m3
Group Group
IC IC IC
3 2 1 1 2
03 05 06
56
TB02 TB5 TB15 TB5 TB15 TB5
M1M2 S M1M2 S 1 2 M1M2 S 1 2 M1M2 S
m1
A1 B2
A1 B2
MA MA
Note1
*1 When only the LM adapter is connected, leave SW5-1 to OFF (as it is).
*2 LM adapters require the power supply capacity of single-phase AC 208 - 230V.
) on the heat
Number of transmission
booster (sold separately)
required
1 unit 2 units
27 - 50
-
units
21 - 39 40 - 50
units units
L12
Group
BS
IC IC IC
2 2 1 1
04 07 08
57 57
TB15 TB02 TB5 TB15 TB5 TB15
S
S 1 2 M1M2 M1M2 S 1 2 M1M2 S 1 2
A1 B2 A1 B2
MA MA
L22
Group
BS
IC IC
3 1 1
09 10
59
TB15
TB02 TB5 TB15 TB5 TB15
1 2
M1M2 S M1M2 S 1 2 M1M2 S 1 2
A1 B2
MA
Numbers in the square indicate port numbers.
Connection to BC controllers
Interlock operation with the ventilation unit
(3) Maximum allowable length
1) Indoor-heat source transmission line
Maximum distance (1.25mm
L11+L12 200m [656ft]
L21+L22 200m [656ft]
2) Transmission line for centralized control
L31+L32(L21)
3) MA remote controller wiring
Maximum overall line length
2
(0.3 to 1.25mm
m1 200m [656ft]
m2+m3 200m [656ft]
4) Maximum line distance via heat source unit
2
(1.25mm [AWG16] or larger)
L32+L31+L12(L11)
L32+L22(L21)
L12(L11)+L31+L22(L21)
- 48 -
Group
BS
IC IC
2
2 1 1 2
11 12
61
TB02 TB5 TB15 TB5 TB15
M1M2 S M1M2 S 1 2 M1M2 S 1 2
A1 B2
MA
LC
1
14
TB5
M1M2 S
2
[AWG16] or larger)
200m [656ft]
[AWG22 to 16])
500m [1640ft]
500m [1640ft]
500m[1640ft]
LC
13
TB5
M1M2 S
GB