VI. COMPONENTS. Applied Air GAS-FIRED HEATERS

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VI. COMPONENTS. Applied Air GAS-FIRED HEATERS | Manualzz

VI. HEATER COMPONENTS

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1. Freeze-Stat Timer (Optional) Allows heater to run long enough so that it won’t shut off before reaching operating temperature. Must be used with the thermostat below. The settings should be on the yellow scale:

Time sector - 30m

Time value - 10m

Red Switch to Right

2. Freeze-Stat Thermostat (Optional) This turns the heater off if the discharge air temperature falls below the set point. The recommended set point is 40 deg. Must be used with the timer above.

3. Starter/Overload A contractor with overload protection installed as an option in units not used with a prewired control package.

4. Transformer Provides 24V AC power to Maxitrol system.

5. Fireye Flame Safety Control (FSC) Initiates flame and monitors it for safety.

6. Transformer Provides 24V AC power to combination gas valve.

7. Temperature Selector Allows the selection of the discharge air temperature.

8. Maxitrol Modulating Amplifier Regulates temperature by modulating gas valve.

9. Ignition Module Produces high voltage spark to ignite burner.

10. High Temperature Limit Control Shuts off burner control when temperature of discharge air exceeds safe operating levels.

11. Airflow Switch A safety device to insure proper air flow during burner operation. Burner will shut off if air flow is lost.

12. Outside Air Override This will automatically turn heater circuit on when the outside air temperature falls below its set point.

13. Combination Gas Valve A combination of redundant solenoid valves and gas regulator built into one unit.

This valve opens when the Burner Control is in the PTFI mode.

14. Modulating Gas Valve After a successful pilot, this valve is opened and modulates to provide the desired discharge air temperature.

15. Inlet Gas Pressure Tap Inlet gas pressure should be measured here when the heater is locked in high fire.

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