24V Thermostat Interface
Thermostat Interface
Installation Manual
8-EN
Transformer
Warning: The 24V Thermostat Interface consumes electrical power of 0.5 W and requires 24V(
±
10%)AC power supply.
Select a reinforced-insulation transformer with proper capacity considering consumption of
other
connected devices. Improper selection may cause electric shock or fire.
Installation Steps
1. Wiring between the Indoor Unit, the Remote Controller, and the 24V Thermostat Interface
1) Refer to installation manuals supplied with the Indoor Unit and the Remote Controller, and this manual for wiring instructions.
2) Terminals A and B are interchangeable, i.e., there is no polarity between them.
Warning: Do not connect high voltage power wire to the Terminals A and B.
Do not use a crimp-style connector for the Terminals A and B.
3) Use AWG20 to AWG14 X 2 wire compliant with local, and national regulations (Field procured).
4) Set the Remote Controller as
“Follower remote control”. Refer to the Installation Manual of the Remote Controller for
instructions on configurations of the controller status.
Caution: 24V Thermostat Interface does not allow dual remote control systems.
2. Wiring between the 24V Thermostat Interface, the Thermostat, and the Transformer
1) Refer to installation manuals of the Thermostat and the Transformer, and this manual for wiring instructions.
2) Use AWG18 wire compliant with local, and national regulations (Field procured).
Warning: Do not connect high voltage power wire to the Terminals G, W2, W1, Y2, Y1, G3, G2, G1, R, TR, C, and TC.
These Terminals are used for 24VAC circuit.
3. Set DIP switches SW01 and SW02 on the main circuit board according to Section
“2 Settings” in this manual.
4. Turn the power to the Transformer on and confirm the Thermostat and the 24V Thermostat Interface are powered properly followed by
forcing the Thermostat to supply output to the Y1/Y2, W1/W2, and G terminals.
