Learn how to correctly connect the AHU-SG2 Air Handler to a CPR or CPH Side Discharge Condensing Unit with the ComfortStar thermostat in Scenario 1 of the 24V+485 AHU Wiring Connection Guide (Technical Bulletin No. TB230427-03).

You can access this bulletin by clicking here or through the ComfortStar Tech Support Mobile App in the APP STORE or GOOGLE PLAY under technical bulletins.

• In Scenario #1, connect the thermostat to HA and HB on the display board and the condenser cables to S1 and S2 on the main board of the AHU-SG2.
• For the CPR or CPH Side Discharge Condensing Unit, attach S1 and S2 on the top terminal board, clearly marked.
• Ensure all DIP switches are in the off position (switched to the bottom).
• When the unit is powered on, the board should display 00.
• Once the thermostat is activated, your settings will appear on the AHU-SG2 display board, and in Scenario 1, the blower motor will start running within seconds.
• In this setup, the blower motor will run continuously even after the desired temperature is reached; only by physically turning off the thermostat can you stop the blower motor.

Stay updated on our latest videos and ensure that you don’t miss out on any valuable content they have to offer. Don’t hesitate to hit that like button and subscribe for more important videos coming soon!  Click here to Subscribe to Our YouTube Channel.