Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 61

[ II Restrictions ]
2. A system in which a system controller is connected to the centralized control transmission line <PQRY>
(1) Sample control wiring
L11
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
OS
52
TB3
M1M2
TB7
M1M2 S
To be left
unconnected
L21
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
OS
56
TB3
M1M2
TB7
M1M2 S
To be left
unconnected
(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 3 ME 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) Replace the power jumper connector of the control board
from CN41 to CN40 on only one of the heat source units.
5) Provide an electrical path to ground for the S terminal on the
terminal block for centralized control on only one of the heat
source units.
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 par-
allel. (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 included in the connected
indoor units
When the P72 or P96 model is in-
cluded in the connected indoor
units
HWE15150
Move the male connector
from CN41 to CN40.
SW5-1 OFF ON
Group
OC BC
51 53
TB3 TB02
M1M2 S
M1M2
TB7
M1 M2S
To be connected
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
Group
OC BC
55 57
TB3 TB02
M1M2 S
M1M2
TB7
To be left
M1M2 S
unconnected
Note1
System controller
A B S
*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.
Number of transmission booster
(sold separately) required
1 unit 2 units 3 units
15 - 34 35 - 50
-
units units
11 - 26 27 - 42 43 - 50
units units units
Interlock operation with the ventilation unit
L12
Group
IC IC
01 02
TB5 TB15 TB5 TB15
M1M2 S 1 2 M1M2 S 1 2
A1 B2 A1 B2
101 102
RC RC
L22
Group
IC IC
04 05
TB5 TB5 TB15
TB15
M1M2 S 1 2 M1M2 S 1 2
A1 B2 A1 B2
154 104
RC RC
The left table shows the number of transmission boosters
that is required by the system with three BC controllers. For
each BC controller that is subtracted from the above-men-
tioned system, two additional indoor units can be connected.
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).
(3) Maximum allowable length
1) Indoor-heat source transmission line
Same as [5] 8.
2) Transmission line for centralized control
Same as [5] 9.
3) ME remote controller wiring
Maximum overall line length
2
(0.3 to 1.25mm [AWG22 to 16])
m1 10m [32ft]
m2+m3 10m [32ft]
If the standard-supplied cable must be extended, use a
cable with a diameter of 1.25mm
of the cable that exceeds 10m [32ft] must be included in
the maximum indoor-heat source transmission line dis-
tance described in (1).
When connected to the terminal block on the Simple re-
mote controller, use cables that meet the following cable
size specifications: 0.75 - 1.25 mm
4) Maximum line distance via heat source unit
2
(1.25 mm [AWG16] or large)
Same as [5] 9.
- 52 -
Group
LC
IC
03 07
TB5 TB15 TB5
M1M2 S 1 2 M1M2 S
A1 B2
103
RC
LC
IC
06 08
TB5 TB15 TB5
M1M2 S 1 2 M1M2 S
A1 B2
106
RC
2
[AWG16]. The section
2
[AWG18-16].
GB