Reference - model igx (8:1 staged) – Greenheck IG / IGX (464104 IOM) (Pre-2009) User Manual
Page 88
88
Reference
Reference - Model IGX (8:1 Staged)
Large
Manifold
Small Manifold
Gas Pressure
Test Port
Gas Pressure
Test Port
3
⁄
4
inch Gas Supply
Connection
Staged Gas
Valve
1
2
3
4
5
6
7
8
1.
Input Converter - Receives and converts signal from a building management system.
2.
Call for Heat Relay - Passes power to furnace controls when there is a call for heat.
3.
Ignition Controllers - Controls the ignition of the furnace. Maintains safe operation of the furnace.
4.
Stage Controller - Provides 8-stage control of the furnace.
5.
Terminal Strip - Provides easy, number coded wiring of the control.
6.
Combustion Blower Contact - Passes power to the combustion blower.
7.
Pressure Switch Relay - Functions as a relay for the pressure switch.
8.
Airflow Switch - Monitors the airflow inside the heat exchanger.
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.