Greenheck Fan PVF manual Electrical Connections, Control Center Layout

Electrical Connections

WARNING!!!

•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. Refer to this wiring diagram for all wiring connections.

3.The combustion blower motor will not run unless the furnace is turned on and the gas controls are calling for heat.

Control Center Layout

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Figure 2: Furnace Control Center

1.Two-stage temperature controls - Controls the furnace stages based on the unit discharge temperature.

2.Combustion blower - Exhausts the products of combustion from the furnace tubes.

3.Ignition controller - Continually monitors, analyzes, and controls the proper operation of the gas burner.

4.Manifold pressure test port - Used for checking the manifold gas pressure.

5.Time Delay relay - Allows burner to stay at high fire for 10 seconds upon being lit.

6.Air pressure switch - Tests to ensure the combustion blower is operating.

7.Two-stage gas valve - Contains main pressure regulator, safety shut-off valves, and manual shut off knob. It controls the furnace to 50% or 100% fire.

8.Ignitor - Provides spark for burner ignition.

9.Flame Sensor - Ensures that each burner has ignited.

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