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READ INSTRUCTIONS CAREFULLY: YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS 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.
UNIVERSAL UNVENTED ROOM HEATER
Plaque Heaters
MHVFDF20RTT
MHVFDF30RTT
WARNING: If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or loss of life.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any
other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer, service agency or the gas supplier.
This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed.
Provisions for adequate combustion and ventilation air must be provided. Refer to Fresh Air for
Combustion and Ventilation section on page 4 of this manual.
This appliance may be installed in an aftermarket permanently manufactured (mobile) home,
where not prohibited by local codes.
This appliance is only for use with propane or natural gas.
This appliance is equipped with a simple means to switch between propane and natural gas.
Field conversion by any other means including the use of a kit is not permitted.
OPERATING INSTRUCTIONS
AND OWNER'S MANUAL
Blue Flame Heaters
MHVFDF20BFT
MHVFDF30BFT
Mr. Heater Products, Inc., 4560 W. 160
Universal Unvented Room Heater
WARNING: Do not attempt to access
or change the setting of the fuel selection
means.
Access to and adjustment of the fuel
selection means must only be performed by
a qualified service person when connecting
this appliance to a specified fuel supply at the
time of installation.
Change of the selector setting to other
than the fuel type specified at the time of
installation could damage this appliance and
render it inoperable.
The installer shall replace the access cover
before completing the installation and
operating this appliance.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
ST., CLEVELAND, OHIO 44135 · 866-447-2194
TH
1
Installation Instructions and Owner's Manual
Model #
MHVFDF20RTT
MHVFDF30RTT
MHVFDF20BFT
MHVFDF30BFT
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Summary of Contents for MrHeater MHVFDF20RTT
- Page 1 Model # OPERATING INSTRUCTIONS MHVFDF20RTT MHVFDF30RTT AND OWNER’S MANUAL MHVFDF20BFT MHVFDF30BFT READ INSTRUCTIONS CAREFULLY: YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS 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.
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Page 2: Warnings
In order to provide the best service possible Mr. Heater Home is now giving you more ways to get in touch with us: WEBSITE: Mr. Heater Products’s full line of product are now at: WWW.MRHEATER.COM FACEBOOK: Find us on Facebook TWITTER: Find us on twitter YouTube: There are now informational videos on Youtube. -
Page 3: Table Of Contents
MODEL MHVFDF20RTT MHVFDF30RTT MHVFDF20BFT MHVFDF30BFT 20,000 BTU/h (NG) Rate (Available) 30,000 BTU/h 20,000 BTU/h 30,000 BTU/h 18,000 BTU/h (Propane/LP) Type of Gas Propane/LP or NG Only Propane/LP or NG Only Propane/LP or NG Only Propane/LP or NG Only Ignition Battery igniter (1-AA) -
Page 4: Determining The Type Of Heater Location Space
Product Features ESTABLISHING ADEQUATE VENTILATION The following are excerpts from National Fuel Gas Code, Igniter Button NFPA 54/ ANSI Z223.1, Section 5.3, Air for Combustion Control Knob and Ventilation. All spaces in homes fall into one of the three following ventilation classifications: Unusually Tight Construction Burners 2. - Page 5 VENTILATION AIR Note: the space includes the room in which you Ventilation from Inside Building install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms. This fresh air would come from an adjoining unconfined space. When ventilation to an adjoining unconfined space, 1.
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Page 6: Installation
• Equipment shutoff valve* • Ground joint union WARNING: Never install the heater: • Test gauge connection* • In a bedroom or bathroom (MHVFDF20RTT, MHVFD- • Sediment trap F30RTT, MHVFDF20BFT, MHVFDF30BFT) • Tee joint • In a recreational vehicle . - Page 7 3. Insert mounting screws through bracket and into wall studs. 4. Tighten screws until mounting bracket is firmly fastened to wall studs. (2) Screws Attaching to Wall using Anchor: (2) Screws For attaching mounting bracket to hollow walls (wall areas between studs) or solid walls (concrete or masonry) Note: Wall anchors, mounting screws, and spacer are in hardware package.
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Page 8: Floor Mounting Away From Wall
4. If installing bottom mounting screw into hollow NATURAL GAS or solid wall, install wall anchors. Follow steps 1 CAUTION: Never connect heater to private (non- through 4 under Attaching to Wall using Anchor. If utility) gas well. This gas is commonly known as well- installing bottom mounting screw into wall stud, drill head gas. - Page 9 Install sediment trap in supply line as shown in figure 12. 7. Reconnect heater and equipment shutoff valve to gas Locate sediment trap where it is within reach for cleaning. supply. A sediment trap traps moisture and contaminants. This 8. Reconnected fittings must be checked for leaks in next keeps them from going into heater.
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Page 10: Operating Your Heater
OPERATING YOUR HEATER 5. Turn counterclockwise to PILOT/IGN, if knob does not turn then slightly depress and turn. Once knob is in FOR YOUR SAFETY READ BEFORE LIGHTING PILOT/ IGN depress for five (5) seconds. WARNING: If you do not follow these instructions Note: The first time that the heater is operated after exactly, a fire or explosion may result causing property connecting the gas supply, the control knob should be... -
Page 11: Cleaning And Maintenance
1. Shut off the unit, including the pilot. Allow the unit to Turn heater off (see To Turn OFF Gas to Appliance, cool for at least thirty minutes. page 10) 2. Inspect burner and pilot for dust and dirt. See Troubleshooting, pages 12-13. 3. -
Page 12: Troubleshooting
Propane/LP to Natural Gas Conversion Natural Gas to Propane/LP Conversion Instructions Instructions Step 1: Reveal the selector valve by removing the screw & Step 1: Reveal the selector valve by removing the screw & access panel on the back of the heater. access panel on the back of the heater. - Page 13 OBSERVED SYMPTOM POSSIBLE CAUSE REMEDY Manifold pressure is too low • Contact local gas company (Natural Gas) • Check that gas regulator at supply (Propane) Delayed ignition of burner Burner orifice is clogged Clean burner orifice (see Cleaning and Maintenance on page 11), or replace burner orifice Burner orifice is clogged or damaged Clean burner orifice (see Cleaning and Maintenance on page...
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Page 14: Parts List And Diagram
OPERATING INSTRUCTIONS Model # MHVFDF20RTT MHVFDF30RTT AND OWNER’S MANUAL MHVFDF20BFT MHVFDF30BFT READ INSTRUCTIONS CAREFULLY: YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS 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.
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