Greenheck IG / IGX (464104 IOM) (Pre-2009) - Manual (Page 87)

87
Reference - Model IGX (Single or 2 Stage)
Gas Pressure
Test Port
3 ⁄
4
inch Gas Supply
Connection
Staged Gas
Valve
Manifold
1
2
3
4
6
5
1. Stage Control - Provides single or 2-stage control of the furnace.
2. Ignition Controller - Controls the ignition of the furnace. Maintains safe operation of the furnace.
3. Terminal Strip - Provides easy, number coded wiring of the control.
4. Combustion Blower Contact - Passes power to the combustion blower.
5. Airflow Switch - Monitors the airflow inside the heat exchanger.
6. Time Delay - Temporarily runs the combustion blower after the furnace has shut down (post-purge).
NOTE!
This is a typical furnace control center, the control center in your unit may be different. Reference the
ladder diagram on the inside of the control center door for a unit specific wiring diagram.
Reference