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Electrical wiring
Connection method differs by the type of thermostat controller.
• Two-stage cooling and heating
Example: Remote controller for 3-wire type
(Locally purchased)
AC 208/230 V
AC 24 V
AC 24 V
Ma
x.
16 units
Indoor unit
Thermostat convertor
Thermostat controller
Transformer*
*: Install the transformer as necessary, per building code and manufacturer’s installation instruc-
tions. (Maximum power: 5.0 VA)
• Single-stage cooling and heating
(Locally purchased)
Max.
16 units
Indoor unit
Thermostat convertor
AC 208/230 V
AC 24 V
Thermostat controller
Transformer*
AC 24 V
*: Install the transformer as necessary, per building code and manufacturer’s installation instruc-
tions. (Maximum power: 5.0 VA)
3-5. Thermostat convertor (UTY-TTRX) - (05-137) - 3. Adaptor/Convertor units
CONTROL
SYSTEM
CONTROL
SYSTEM
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