¢ Wiring diagram
(1)
(2)
(3)
(4)
(5)
AC
220/230/240 V*¹
Electric transformer
(AC 240 V to 24 V)*²
External power
supply unit
Relay*²
Indoor unit
PCB
AC
220/230/240 V
(for indoor unit)
NOTES:
• *1: A dedicated power supply that is not shut off even if turned off the indoor units.
• *2: Locally purchased.
(1) Connect the external power supply unit and the PCB of the indoor unit with the provided connect-
ing cable. (Depending on the model of the indoor unit, the adapter cable is also used.)
(2) Connect AC 24 V (±20%) power to the terminal of the external power supply unit.
(3) Connect the contact side of the relay (with the normally closed contact) to external power supply
unit.
(4) Connect the inner and relay power lines to the circuit breaker.
(5) Connect the power line of the power transformer primary side to the circuit breaker.
¢ Electrical requirement
The following items are necessary to install this product. (These items are not included with this
product and must be purchased separately.)
Name Q’ty Description
Relay 1
Primary side voltage: AC 220 to 240 V.
Secondary side rated current: 3 A or more.
Normally Closed contact.
IEC61810-1 or 60335-1
Reinforced insulation between primary side and secondary
side
Electric transformer 1
AC 24 V ±15%
UL Class II
NOTE:
When connecting multiple units, do not exceed the capacity of the transformer.
8-6. External power supply unit (UTZ-GXXA)
- (10-57) - 8. Optional parts installation
OPTIONAL
PARTS
OPTIONAL
PARTS
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