Specifications

WR2-SERIES SYSTEM DESIGN (June 2010)
WR2SD-13
WR2-SERIES
SYSTEM DESIGN
2. M-NET CONTROL
Heat source unit
Heat source unit
Heat source unit
Heat source unit
MA remote controller
Group Group
Indoor unit
M-NET transmission lines
(transmission lines
for central controller)
M-NET transmission lines
(transmission lines
for central controller)
ME remote controller
MA remote controller
ME remote controller
Group Group
Group Group
Group Group
Indoor unit
Indoor unit
Indoor unit
Replacement of
CN41 with CN40
Use CN41
as it is.
TB7
TB3
TB3
Replacement of
CN41 with CN40
Use CN41
as it is.
System controller
(excluding LMAP02-E)
System
controller
M-NET transmission lines
(Indoor-Heat source transmission lines)
TB7
TB3
System
controller
TB7
TB7
TB3
Maximum 3 System controllers can be connected to TB3.
Maximum 3 System controllers can be connected to TB7.
M-NET transmission lines
(Indoor-Heat source transmission lines)
The power to System controller (excluding LMAP03-U) is supplied via M-NET transmission line. M-NET transmission line
at TB7 side is called Central control transmission line while one at TB3 side is called Indoor-Heat source transmission
line. There are 3 ways to supply power to the System controller .
A) Connecting to TB3 of the
Heat source unit and receiving power from the Heat source unit.
B) Connecting to TB7 of the
Heat source unit and receiving power from the Heat source unit.
C) Connecting to TB7 of the
Heat source unit but receiving power from power supply unit PAC-SC51KUA.
Maximum 3 System controllers can be connected to TB3.
If there is more than 1
Heat source unit, it is necessary to
replace power supply switch connector CN41 with CN40
on one
Heat source unit.
Maximum 3 System controllers can be connected to TB7
and receiving power from the
Heat source unit.
It is necessary to replace power supply switch connector
CN41 with CN40 on one
Heat source
unit.
Fig. 2-3-3-A
Fig. 2-3-3-B
2-3-3-A. When connecting to TB3 of the
Heat source
unit and receiving power from the
Heat source
unit.
2-3-3-B. When connecting to TB7 of the
Heat source unit and receiving power from the Heat source unit.
2-3-3. Ensuring proper power supply to System controller
PAC-SC51KUA
M-NET transmission lines
(transmission lines
for central controller)
MA remote controller
ME remote controller
Group Group
Group Group
Indoor unit
Indoor unit
TB3
Heat source unit
Heat source unit
Use CN41
as it is.
Use CN41
as it is.
System
controller
TB7
TB7
TB3
CAUTION
M-NET transmission lines
(Indoor-Heat source transmission lines)
AG-150A/GB-50A/GB-50ADA/GB-24A/TC-24A is recommended to connect to TB7 because these controllers perform back-up to a number of data.
In an air conditioner system has more than 1 Heat source units, AG-150A/GB-50A/GB-50ADA/GB-24A/TC-24A receiving transmission power at TB3 or TB7
on one of the Heat source units would have a risk that the connected Heat source unit failure would stop power supply to AG-150A/GB-50A/GB-50ADA/
GB-24A/TC-24A, and disrupt the whole system. When applying apportioned electric power function, AG-150A/GB-50A/GB-24A/TC-24A is necessary to
connected to TB7 and has its own power supply unit PAC-SC51KUA.* *Power supply unit PAC-SC51KUA is for AG-150A.
When using PAC-SC51KUA to supply transmission
power, the power supply connector CN41 on the Heat
source units should be kept as it is. It is also a factory
setting.
1 PAC-SC51KUA supports maximum 1 AG-150A unit
due to the limited power DC 24V at its TB3.
However, 1 PAC-SC51KUA supplies transmission power
at its TB2 equal to 5 Indoor units, which is referable at
Table 2-3-2.
If PZ-52SF, Timers, System controller, ON/OFF controller
connected to TB7 consume transmission power more
than 5 (Indoor units), Transmission booster
PAC-SF46EPA is needed. PAC-SF46EPA supplies
transmission power equal to 25 Indoor units.
Fig. 2-3-3-D
2-3-3-C. When connecting to TB7 of the Heat source unit but receiving power from PAC-SC51KUA.