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Wiring Diagram
Wiring
•
The AHU Control Unit (ACU) must be powered by the same transformer as the indoor unit. If more than one transformer
is used, product damage will occur.
•
Maximum power consumption of the AHU Control Unit(ACU) is 3W.
•
If a 1-stage thermostat is used, connect the Y output to either the Y1 or Y2 input terminal on the AHU Control Unit
(ACU). Use a separate jumper wire to connect Y1 to Y2 of the AHU Control Unit (ACU).
•
If the indoor unit only has a Y input terminal, connect it to the Y1 output terminal in the AHU Control Unit (ACU).
CAUTION
•
Turn off the power before connecting the terminals.
•
Use appropriate tools for wiring. Be sure to connect the wires tightly using a tightening torque less than the standard
torque, to withstand external pressure.
•
Screws on the PCB terminal must be tightened with less than a 0.53 lbf·in (6 N·cm) tightening torque. If a greater
tightening torque is used, the screw thread may become damaged.
•
After connecting the terminals, organize the wires properly to prevent overheating, electric shock or fire.
•
Make sure that only 24 VAC is connected to the terminal blocks of the AHU Control Unit (ACU). Samsung is not
responsible for any accident resulting from use of power that is not 24 VAC.
English
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