3
*Please confirm that in addition to this Installation Manual the following items are enclosed in the box.
No. Part name Qty.
1 Central controller 1
2 L-fitting 2
3 M3 (8mm (5/16in)) round head screw (for fixation of the fitting described in 2 above) 4
4 DIN rail attachment 2
5 M3 (6mm (1/4in)) round head screw (for fixation of the attachment described in 4 above) 8
6 Installation manual (this book) 1
7 Installation book 1
* The screws for installing to the 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 central controller
through the transmission line, must be purchased. When R410A, however, the power can be supplied also from the
R410A outdoor unit.
Unit that supplies the
power to GB-50A
The number of
connectable GB-50A
Remarks
PAC-SC50KUA 2 units *1 ● When only one GB-50A 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.)
● When two GB-50A units are connected
No other system controllers can be connected.
R410A outdoor unit
(connected to the
transmission line for
central control)
1 unit Replace CN41 (power-supply switch connector) with
CN40 on only one outdoor unit.
Connectable number of indoor units will decrease by
4 units.
Outdoor unit other than
described above
(connected to
the indoor/outdoor
transmission line)
1 unit Connectable number of indoor units will decrease by
4 units.
*1: Cannot be connected to the different transmission line for central control in the different system.
* Use PAC-SC50KUA (power supply unit) when “Charge” function is used, or multiple outdoor units are connected. Connect
only the M-NET terminal (TB2) on PAC-SC50KUA to the M-NET terminal on GB-50A.
2 Confirmation of Parts
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