Greenheck IGX Installation, Operation And Maintenance Manual page 24

Start-Up Instructions:
Furnace - Control Center
• Disconnect power supply before making wiring connections to prevent electrical shock and
equipment damage.
• All appliances must be wired strictly in accordance with wiring diagram furnished with the unit.
Any wiring different from the diagram could result in a hazard to persons and property.
• Any original factory wiring that requires replacement must be replaced with wiring material having
a temperature rating of at least 105°C.
1. Installation of wiring must conform with local building codes. In the absence of local codes, installation must
conform to the National Electric Code ANSI/NFPA 70-Latest Edition. Unit must be electrically grounded in
conformance with this code. In Canada, wiring must comply with CSA C22.1, Canadian Electrical Code.
2. All furnaces are provided with a wiring diagram located on the inside of the access panel.
3. The combustion blower motor will not run unless the furnace is turned on and the gas controls are calling for
heat.
Furnace Control Center Layout
1
13
2
4
9
6
12
8
Figure 7: Furnace Control Center
3
5
10
11
7
WARNING!!!
1. Maxitrol Amplifier - Converts the signal from the
discharge air stat to a working voltage to control the
modulating gas valve. (Electronic Modulation Only)
2. Discharge Temperature Dial Control - Sets the desired
discharge temperature(Electronic Modulation Only).
3. Combustion Blower - Exhausts the products of
combustion from the furnace tubes.
4. Ignition Controller - Continually monitors, analyzes, and
controls the proper operation of the gas burner.
5. Air Pressure Switch - Tests to ensure the combustion
blower is operating.
6. Time delay relay
7. Combination Gas Valve - Contains main pressure
regulator, safety shut-off valves, and manual shut off
knob.
8. Modulating Gas Valve - Modulates gas to main burner
for proper furnace discharge temperature. (Electronic
Modulation Only)
9. Manifold Pressure Test Port - Used for checking the
manifold gas pressure.
10. High Limit - Protects furnace from over heating. Auto
reset device.
11. Discharge Air Sensor - Measures discharge air
temperature.
12. Igniter - Ignites burner by sparking.
13. Flame Sensor - Ensures that each burner has ignited.
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