Mr. Heater MHT 45 owner manual Operation of the Heater, Maintenance Pre-Season Maintenance

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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.

WARNING 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.

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

19

Operating Instructions and Owner’s Manual

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Contents For Your Safety Contents Introduction Available AccessoriesBefore YOU Begin Unpacking the HeaterRear View About The HeaterEnd View Technical SpecificationsHeater Specifications Venting SpecificationsGas Service Requirements System Requirements Where can the heater be installed?Where can’t the heater be installed? Installer’s responsibilityVenting Codes Non-residential InstallationsGrounding Venting RequirementsInstallation Materials InstallationSafety Equipment Installation ToolsMinimum Required Safe Distances from Combustibles Horizontal InstallationsTilted Installations General Guidelines ResidentialHeater Orientation Horizontal InstallationTilted Installation Hang the HeaterMHT Heater Assembly Instructions Requirements of your local gas supplier Typical Installation VentingCanadian Installations1 US Installations2 This sectionVertical Through the Roof Basic Flue Venting Residential OnlyRoof Pitch Min Venting/DuctingHorizontal Through the Sidewall Double Wall Horizontal VentingVertical Venting Single WallVertical Venting Air For Combustion ResidentialOutside Combustion Air Supply Direct Outside Air For Combustion ResidentialSystem Requirements Electrical Service InstallationGas Service Installation Install Gas Supply LinesUse LP-resistant joint compound on all threads OperationSupplied by others Operation of the Heater Maintenance Pre-Season MaintenanceProper Operating Flame Blower does not Come on TroubleshootingIgniter does not Spark Burner does not Stay LIT Burner does not LightIllustrated Parts Illustrated PartsHST-35 HST-45 Mr. Heater Model #MHT 45 Tube Heater Model # MHT

MHT 45 specifications

The Mr. Heater MHT 45 is a versatile and powerful heating solution designed for both residential and commercial spaces. This portable propane heater stands out in the market due to its efficient heating capabilities and user-friendly features, making it ideal for workshops, garages, and outdoor activities.

One of the standout features of the MHT 45 is its robust heating output. It can deliver an impressive 45,000 BTUs, ensuring that even larger spaces are heated quickly and effectively. This high output is particularly beneficial during colder months, where rapid warmth is essential for comfort and productivity. The heater offers a heating range of up to 1,000 square feet, making it suitable for various applications, whether in the home or on the job site.

The MHT 45 utilizes advanced radiant heating technology, providing even warmth without requiring a fan. This technology allows for silent operation, making it an excellent option for noise-sensitive environments. Additionally, the radiant heat minimizes air movement and helps maintain humidity levels, creating a comfortable atmosphere while reducing dust and allergens in the air.

Another noteworthy characteristic is its portability. The MHT 45 comes equipped with a sturdy handle, allowing for easy transport between locations. This makes it a favorite among tradespeople who need efficient heat in different work areas or outdoor enthusiasts who want comfort while camping or tailgating.

Safety features are abundant in the Mr. Heater MHT 45. It includes an automatic shut-off system, which activates if the heater tips over, ensuring user safety. The built-in oxygen depletion sensor automatically turns the heater off if it detects low oxygen levels in the surrounding environment, providing peace of mind while operating.

The heater runs on a 20-pound propane tank, providing a substantial amount of heating time before needing a refill. This efficiency means users can rely on the MHT 45 for extended periods without frequent interruptions.

In summary, the Mr. Heater MHT 45 is a powerful propane heater packed with features that cater to both indoor and outdoor heating needs. With its high BTU output, silent operation, portability, and extensive safety measures, it represents a reliable choice for anyone looking to stay warm in various settings. Whether for personal use or demanding job sites, the MHT 45 is engineered to deliver comfort and convenience.
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