Frc1bc-2 Wiring Diagram «2024»

This board is typically rated for 24VAC control input, switching line voltage (120V or 240V) to the blower and heater elements.

. Connect this to your control switch. When this pin receives +12V (and Pin 85 is grounded), the relay "clicks" and activates. Main Power Input (Fused)

The is not as intimidating as it first appears. It is a logical collection of relay switches connecting your thermostat's low-voltage commands to high-voltage components.