Mr. Heater MHT 45 Operation of the Heater, MAINTENANCE Pre-SeasonMaintenance, ou propriété

Models: MHT 45

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Operation of the Heater

Operation of the Heater

CHILDERN AND ADULTS SHOULD BE ALERTED TO THE HAZARDS OF HIGH SURFACE TEMPERATURES AND SHOULD STAY AWAY TO AVOID BURNS OR CLOTHING IGNITION.

YOUNG CHILDERN SHOULD BE CAREFULLY SUPERVISED WHEN THEY ARE IN THE SAME SPACE AS THE HEATER.

CLOTHING OR OTHER FLAMMABLE MATERALS SHOULD NOT BE HUNG FROM THE HEATER, OR PLACED ON OR NEAR THE HEATER.

ANY GUARD OR OTHER PROTECTIVE DEVICE REMOVED FOR SURVICING THE HEATER MUST BE REPLACED PRIOR TO OPERATING THE HEATER.

INSTALLATION AND REPAIR SHOULD BE DONE BY A QUALIFIED SERVICE PERSON. THE HEATER SHOULD BE INSPECTED BEFORE USE AT LEAST ANNUALLY BY A QUALIFIED SERVICE PERSON.

MORE FREQUENT CLEANING MAY BE REQUIRED AS NECESSARY. IT IS IMPERATIVE THAT THE CONTROL COMPARTMENT, AIR PASSAGEWAYS AND BURNER (S) OF THE HEATER ARE KEPT CLEAN.

1.Turn the thermostat up. When the thermostat calls for heat, the blower motor will energize.

2.When the motor approaches nominal running speed, the air proving switch closes and activates the ignition module which in turn initiates the purge.

3.The ignition module then energizes the spark igniter.

4.When sparking begins, the gas valve is energized.

5.If a flame is detected, the gas valve remains open. When the call for heat is satisfied, and the system control mechanism de- energizes, the burner line voltage supply and the gas valve are turned off.

6.If no flame is detected, the gas valve is closed, and a purge period begins. After the purge period, the ignition module energizes the spark igniter and the gas valve. If a flame is still not established, a third and final purge/ignition sequence is begun. After three failed attempts, the system control mechanism will lock out for a period of one hour, or until the unit is reset. Reset is accomplished by removing power from the heater for at least five seconds.

7.With a three-try module, when the flame is established and then lost on the first or second trial, the gas valve will automatically turn off. A purge and trial for ignition will then occur.

8.Periodic visual check of burner flame while unit is in operation through sight glass in bottom of unit.

Section 6 MAINTENANCE

Pre-Season Maintenance

Heater area to be kept clear and free form combustible materials, gasoline and other flammable vapors and liquids.

Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and replace any part of the control system and any gas control, which has been under water.

(CAUTION) Label all wires prior to disconnection when servicing controls. wiring errors can cause improper and dangerous operation.

For best performance, the following maintenance procedures should be performed by a qualified service agency before each heating season:

1.A qualified service agency should be contacted for service other than routine maintenance.

Section 6 MAINTENANCEWARNING Turn off the gas and electrical supplies to the heater before performing any service or maintenance. Failure to observe this warning will cause death, injury or property damage.

ou propriété.ATTENTION le virage du gaz et les provisions élec- triques à l’appareil de chauffrage l’avant d’exécuter service de anr ou l’entretien. L’échec pour observer que cet avertissment causera la mort, les dommages de blessure

ou propriété.

2.Check condition of blower scroll and motor. Dirt and dust may be blown out with compressed air, or a vacuum cleaner may be used.

3.Check the condition of the burner cup. Carefully remove any dust or debris form inside burner cup.

4.Inspect the igniter. Replace igniter if there is excessive carbon residue, erosion of electrodes of other defects.

5.Check to see that the burner observation window is clean and free of cracks or holes. Clean or replace as required.

6.Check the flue pipe for soot, dirt or obstructions. The flow of combustion and ventilation air should not be obstructed. After cleaning as necessary, re-attach the flue pipe to the heater.

7.Outside surfaces of heater reflector may be cleaned by wiping with a damp cloth.

8.Check vent terminal and outside air inlet to see that they have not become blocked during the non-heating season. If either pipe is restricted, the air switch won’t close, resulting in a no- heat situation.

9.Verify proper operation after service.

Proper Operating Flame

Mr. Heater Gas-Fired Low-Intensity Infrared Heater

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Operating Instructions and Owner’s Manual

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Mr. Heater MHT 45 Operation of the Heater, MAINTENANCE Pre-SeasonMaintenance, Proper Operating Flame, ou propriété