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Model #
OPERATING INSTRUCTIONS
MHT 45
AND OWNER’S MANUAL
READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place instructions in a safe place
for future reference. Do not allow anyone who has not read these instructions to assemble, light,
adjust or operate the heater.
Gas-Fired, Low-Intensity Infrared Heaters
approved for residential Garage/Commercial Applications
Improper installation, adjustment, alteration, service or maintenance
WARNING:
can cause injury or property damag
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WARNING: WARNING: YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS, FIRE, BURN, INHALATION, AND EXPLOSION HAZARD. SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU KEEP SOLID COMBUSTIBLES, SUCH AS BUILDING OPERATE THIS HEATER. MATERIALS, PAPER OR CARDBOARD, A SAFE DISTANCE AWAY FROM THE HEATER AS RECOMMENDED BY THE L’AVERTISSEMENT: INSTRUCTIONS NEVER USE THE HEATER IN SPACES Votre surete est importante a vous et donc s’il vous WHICH DO OR MAY CONTAIN VOLATILE OR AIRBORNE plait lire ces inst
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BEFORE YOU BEGIN Available Accessories Read this manual carefully before installing or servicing this Vent Kit (F102840) equipment. Improper installation, servicing or maintenance will cause death, injury or property damage. Check the minimum 1. (2) 3" x 2' Pipe 26GA. required safe distances from combustibles given on the outside 2. (1) 36" x 3" B-Vent of each burner to make sure that the product is suitable for your 3. (1) Gas Vent Top 3" application. The minimum required safe dist
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About The Heater Intake Vent Exhaust Vent 1/2" NPT Power Cord Burner Box - Rear View - Front Fixed Hanger Reflector Heat Exchanger Rear Movable Hanger Control Side Access Burner Box Contains the electrical components (i.e. blower motor, power transformer, etc.) and gas distribution components (i.e. gas valve, etc.) that make the heater work. There are no owner serviceable items contained in this box. Front Fixed Hanger Provides rigid support and mounting surface for the reflector. Hole
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Technical Specifications: Length 1/2" 11 1" Max. Reflector Suspension Points Burner Box Heat Exchanger - Side View - 1/2 13 " - End View - 9" Leading Particulars Model No. BTU/hr Weight Length MHT-45 45,000 96 lbs. 10’ VENTING SpECIFICATIONS HEATER SpECIFICATIONS Vent/Flue Electrical Length – 25 feet (Maximum) Rating: 120VAC, 60Hz, single phase, 1 amp 5 feet (Minimum) Connection: 3 pin molded plug Flue Pipe – 3.0” diameter Gas Inlet Connection Vent Pipe – 3” diameter Connection ½” M
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Where can the heater be installed? Section 2 pLANNING The MHT tube heater is intended for installation in the following areas: General • Residential applications, such as: This section provides the following information: — garages •Defines the gas, electric and venting requirements for the MHT tube heater. — greenhouses •Specifies the national standards and applicable codes that — workshops apply to the gas, electric and venting requirements. • Light industrial/commercial a
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ATTENTION Electrical Service Requirements: Risque de monoxyde de carbone System Requirements L echappement du radiateur doit s’effectuer a l’exterieur. The MHT tube heater requires a grounded three-prong electrical Utillisez le materiel fourni. outlet to be installed within 18 inches of the rear surface of the Le non-respect de ces consignes peut entrainer mort ou heater’s burner box. It is recommended that the outlet for the heater blessures. be ceiling-mounted and should be on a dedi
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Section 3 INSTALLATION Installation Materials Materials required for the installation of theMHT tube heater include at a minimum the following: WARNING Several steps are involved in the installation of the heater. • High temperature silicone sealant DO NOT attempt to operate the heater until ALL steps of the installation have been accomplished. Failure to follow • Suspension hooks (capable of supporting 150 pounds each) this warning will cause death, injury or property damage. • Sheetm
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damage. Clearances from vehicles parked beneath heaters must General Guidelines (Residential) be maintained. Signs should be posted to identify any possible Regardless of the venting arrangement that will be connected to the violation of the clearance distances form the heater in the vehicle heater, the following general guidelines for venting must be followed: areas. Maximum allowable stacking height in storage areas should be identified with signs or appropriate markings. The illustration
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Hang the Heater Horizontal Installation Residential garages come in a variety of sizes, shapes, styles and 1. Using S-hooks, attach two equal lengths of 2/0 chain, or methods of construction. Because of all these variables, it is not equivalent, to the two uppermost holes in the front fixed hanger. possible to include mounting hardware with the Mr. Heater MHT 2. Slip the free end of both chains onto another S-hook, as shown. heater. Although wooden rafters and joists are the most common 3.
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MHT HEATER ASSEMBLY INSTRUCTIONS 1. Place gaskets from Gasket kit (02885) on each side of the burner box. Use the four mounting studs around each of the three-inch holes for location. 2. Slide the tube flanges over the studs as was done in the prior step with the gaskets. The tube ends extend through the flanges to help with alignment. 3. Using the four long and four short nuts from the bolt kit (02876) secure the tube set to the burner box. As shown in the diagram, USE CAUTION AS NOT TO
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Typical Installation Section 4 VENTING The Illustration below shows a typical installation of the MHT tube This appliance is certified under the ANS/CSA Standard for Vented heater. The installation drawing shown has a straight horizontal Gas-Fired Space Heating Appliances. In accordance with these venting arrangement and specifies the minimum space required for standards all sidewall venting must conform to the supplied diagram maintenance, as well as the allowable range of distances between
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The seams along the length of the piping and the joints BASIC FLUE VENTING (Residential Only) between sections of piping should be sealed to prevent a • Venting must be in compliance with the latest edition of the potential leakage of flue gas into building. Use 100% RTV National Fuel Gas Code (ANSI. Z223.1 latest edition: or the Silicone Rubber Adhesive sealant suitable for 500°F. authority having jurisdiction. 6. All portions of the vent pipe shall be supported to prevent from • Uninsul
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NOTE: To minimize problems associated with MINIMUM HEIGHT FROM ROOF condensation in long runs, vent pipe can be TO LOWEST DISCHARGE OpENING insulated. Roof pitch H (Min) 3. The horizontal venting system approved with this heater consists of the Side Wall Vent Kit (02840) shown are page 3. Flat to 6/12 1.0 Feet 4. Limit the quantity of 90° elbows to two. When vent pipe is in a Over 6/12 to 8/12 1.5 Feet horizontal run, it must be pitched downward ¼ inch per foot Ove
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codes as required for each particular location. Single Wall Single wall vent run b) Exhaust end of heater will accept a three (3") inch flue pipe using Single wall terminal end the flue pipe adapter. c) Heater may be vented to the outdoors either vertically or horizontally. d) If heater is to be vented horizontally: 1) Vent must exit building not less than seven (7') feet above grade when located adjacent to public walkways. 2) Vent must terminate at least three (3') feet above any forced a
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VERTICAL THROUGH THE ROOF Vertical Venting Vent Cap (Leslie VersaCap) 3" Dia. Single-Wall Pipe 3' Min. 6" Min. Flashing ¼” per ft. 3" Starting Collar downwards Air For Combustion (Residential) Intake Vent If indoor combustion air is to be supplied for a tightly enclosed area, one square inch of free area opening shall be provided below the heater for each 1,000 Btu/hr of heater input. Outside Combustion Air Supply When outside air is used, the opening below the heater shall be one squ
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Electrical Service Installation: System Requirements CAUTION Label all wires prior to disconnection when The MHT tube heater requires a grounded three-prong electrical servicing controls. wiring errors can cause improper and outlet to be installed within 18”of the rear surface of the heater’s dangerous operation. Verify proper operation after servicing. burner box. It is recommended that the outlet for the heater be ceiling-mounted and should be on a dedicated circuit. DO NOT use an elec
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when such use is in compliance with local codes. All pipe, tube Supplied and fittings should be new and free from defects. Carefully ream by others the pipe and tube ends to remove obstructions and burrs. 3. Use LP-resistant joint compound on all threads. 4. Check the pipe and tube connections for leaks before placing heating equipment into service. When checking for gas leaks, use a soap and water solution; never use an open flame. NOTE: A plugged 1/8” NPT tapping must be provided upst
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1. A qualified service agency should be contacted for service other Operation of the Heater than routine maintenance. CHILDERN AND ADULTS SHOULD BE ALERTED TO THE HAZARDS OF HIGH SURFACE TEMPERATURES AND SHOULD STAY AWAY TO AVOID WARNING Turn off the gas and electrical supplies to BURNS OR CLOTHING IGNITION. the heater before performing any service or maintenance. YOUNG CHILDERN SHOULD BE CAREFULLY SUPERVISED WHEN Failure to observe this warning will cause death, injury or THEY ARE IN
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Section 7 TROUBLESHOOTING General This troubleshooting quide has been designed to assist you in locating and correcting minor problems that may occur with the MHT tube heater. BLOWER DOES NOT COME ON Possible Cause Try This…. Power cord is not plugged in. Plug power cord into a grounded three prong Outlet. Thermostat setting is too low. Increase thermostat temperature setting. DSI module needs to be reset. Unplug heater power cord from
