3
*Please confirm that in addition to this Installation Manual, the following items are shipped with the unit.
* The screws for installing to the metal control panel are not included. (M4 screws)
* In addition to the parts above, a power supply unit for transmission line, which supplies the power to the centralized
controller through the transmission line, must be purchased. If the outdoor unit is a CITY MULTI R410A model, however, the
outdoor unit can also supply the power (Not applicable to the PUMY model).
*1: Each system allows the connection of only one GB-24A.
* Use PAC-SC50/51KUA (power supply unit) when multiple outdoor units are connected. Connect only the M-NET terminal
(TB2) on PAC-SC50/51KUA to the M-NET terminal on GB-24A
No.
Part name
Qty.
1
Centralized controller
1
2
L-fitting
2
3
M3 (8mm (5/16in)) round head screw (for attaching the L-fitting)
4
4
DIN rail attachment
2
5
M3 (6mm (1/4in)) round head screw (for attaching the DIN rail attachment)
8
6
Installation manual (this book)
1
7
Instruction book
1
8
Web browser operation manual
1
9
Operation manual for Initial setting web
1
Unit that supplies the
power to GB-24A
The number of
connectable GB-24A
Remarks
PAC-SC51KUA
1 unit *1
x
When only one GB-24A unit is connected Up to two
other system controllers can be connected to the
transmission line for central control.
(Up to two ON/OFF remote controllers, up to four system
remote controllers, up to four schedule timers, or up to
four group remote controllers can be connected.)
PAC-SC50KUA
1 unit *1
x
When only one GB-24A unit is connected Up to three
other system controllers can be connected to the
transmission line for central control.
(Up to three ON/OFF remote controllers, up to six
system remote controllers, up to six schedule timers, or
up to six group remote controllers can be connected.)
R410A CITY MULTI
outdoor unit (TB7)
(connected to the
transmission line for
central control)
1 unit
x
x
*
x
Replace CN41 (power-supply switch connector) with
CN40 on only one outdoor unit.
Connectable number of indoor units will decrease by
4 units.
CITY MULTI units except the PUMY model (R410A
outdoor units only)
When multiple outdoor units are connected to the
system and the power to the outdoor unit is cut off to
which the GB-24A is connected, that GB-24A will shut
down.
CITY MULTI outdoor unit
(TB3)
(connected to
the indoor/outdoor
transmission line)
1 unit
x
x
Connectable number of indoor units will decrease by
4 units.
When multiple outdoor units are connected to the
system and the power to the outdoor unit is cut off to
which the GB-24A is connected, that GB-24A will shut
down.
2
Parts List
