Mr. Heater MHVFRD20NGT Operating Instructions And Owner's Manual
Unvented natural gas fired room heater
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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.
UNVENTED NATURAL GAS FIRED ROOM HEATER
MHVFRD20NGBT
(BLOWER INCLUDED)
MHVFRD20NGT
(BLOWER SOLD SEPARATE)
MHVFRD30NGBT
(BLOWER INCLUDED)
MHVFRD30NGT
(BLOWER SOLD SEPARATE)
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 the type of gas indicated on the rating plate. This appliance is
not convertible for use with any other gas.
Unvented Natural Gas Vent Free Room Heaters
OPERATING INSTRUCTIONS
AND OWNER'S MANUAL
Plaque Heaters
MR. HEATER, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 · 800-251-0001
Blue Flame Heaters
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
1
Installation Instructions and Owner's Manual
Model #
MHVFRD20NGBT, MHVFRD20NGT
MHVFRD30NGBT, MHVFRD30NGT
MHVFBF20NGBT, MHVFBF20NGT
MHVFBF30NGBT, MHVFBF30NGT
MHVFBF20NGBT
(BLOWER INCLUDED)
MHVFBF20NGT
(BLOWER SOLD SEPARATE)
MHVFBF30NGBT
(BLOWER INCLUDED)
MHVFBF30NGT
(BLOWER SOLD SEPARATE)
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Related Manuals for Mr. Heater MHVFRD20NGT
Summary of Contents for Mr. Heater MHVFRD20NGT
- Page 1 This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with any other gas. MR. HEATER, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 · 800-251-0001 Unvented Natural Gas Vent Free Room Heaters...
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Page 2: Warnings
SOCIAL MEDIA In order to provide the best service possible Mr. Heater is now giving you more ways to get in touch with us: WEBSITE: Mr. Heater’s full line of product are now at: www.mrheater.com... -
Page 3: Table Of Contents
Fabric / flammable objects 36” (91.4cm) 36” (91.4cm) 36” (91.4cm) 36” (91.4cm) *Blower not included on the following units: MHVFRD20NGT, MHVFRD30NGT, MHVFBF20NGT, MHVFBF30NGT **Operating heater above elevations of 4,500 feet could cause pilot/ODS to shutdown heater.** CONTENTS WARNINGS ................2 SPECIFICATIONS ..............3 6. -
Page 4: Ignition System Battery Installation
PRODUCT FEATURES FRESH AIR FOR COMBUSTION AND VENTILATION WARNING: This heater shall not be installed in a confined Ignitor Button space or unusually tight construction unless provisions are Fan Blower Switch* provided for adequate combustion and ventilation air. Read Control Knob (located on back of the following instructions to insure proper fresh air for this heater) -
Page 5: Determining The Type Of Heater Location Space
DETERMINING THE TYPE OF HEATER LOCATION You must provide additional fresh air. Your options are as follows: SPACE: A. Rework worksheet, and the space of an adjoining room. Use this method to determine if you have a confined or If the extra space provides an unconfined space, remove unconfined space. -
Page 6: Installation
WARNING: Never install the heater: This will help circulate the heat throughout the house. In • In a bedroom (MHVFRD20NGBT, MHVFRD20NGT, the event of a power outage, you can use this heater as MHVFRD30NGBT, MHVFRD30NGT, MHVFBF20NGBT, your primary heat source for the duration of the outage. -
Page 7: Fastening Heater To Wall
Attaching to Wall Stud: This way is the best providing the strongest mounting in wood frame houses. Attaching to Wall Anchor: 10”(25.4cm) 36”(91.4cm) from sides This way allows you to attach mounting bracket to hollow min from ceiling walls (wall areas between studs) or to solid walls (concrete or masonry). -
Page 8: Floor Mounting Away From Wall
2. Mark screws locations on wall. 3. Remove heater from mounting bracket. 4. If installing bottom mounting screw into hollow or solid wall, install wall anchors. Follow steps 1 Figure 8. through 4 under Attaching to Wall using Anchor. If installing bottom mounting screw into wall stud, 3. - Page 9 CAUTION: Never connect heater to private (non-utility) CHECKING GAS CONNECTIONS gas well. This gas is commonly known as well-head WARNING: Test all gas piping and connections for gas. leaks after installing or servicing. Correct all leaks at IMPORTANT: Check your gas line pressure before once.
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Page 10: Operating Your Heater
If any original wiring as supplied with the heater must be Open replaced, it must be replaced with type AWG 105 C wire or its equivalent except as indicated. WARNING: Electrical Grounding Instructions: This heater is equipped with a three-prong (grounding) plug for your protection against Equipment Closed shock hazard and should be plugged into a properly... - Page 11 SHUTTING OFF BURNER ONLY (PILOT STAYS LIT) Turn control knob clockwise to the PILOT/IGN position. THERMOSTAT CONTROL OPERATION FOR MHVFRD20NGBT, MHVFRD20NGT, MHVFRD30NGBT, MHVFRD30NGT: The thermostatic control used simply turns on and off the burner. FOR MHVFBF20NGBT, MHVFBF20NGBT, MHVFBF30NGBT, MHVFBF30NGBT:...
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Page 12: Cleaning And Maintenance
CLEANING AND MAINTENANCE Pilot Air Inlet Hole WARNING: Turn off heater and let cool before servicing. For maintenance of the inside cabinet or to access the burner Pilot Assembly and pilot assembly for cleaning or service. Remove the four screws(two located on each side) that secure the front shell Figure 18 to the unit (Figure 6). - Page 13 PAGE LEFT INTENTIONALLY BLANK Unvented Natural Gas Vent Free Room Heaters Installation Instructions and Owner’s Manual...
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Page 14: Troubleshooting
TROUBLESHOOTING NOTE: All troubleshooting items are listed in order of operation and likely occurrence. WARNING: Only a qualified service person should service and repair heater. CAUTION: Never use a wire needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit. Make sure grille guard is in place before running heater. - Page 15 OBSERVED SYMPTOM POSSIBLE CAUSE REMEDY Burner orifice is clogged Clean burner orifice (see Cleaning and Maintenance on page 12), or replace burner orifice Burner does not light after Burner orifice diameter to small Replace burner orifice ODS/pilot is lit Inlet gas pressure is too low Contact local gas company Manifold pressure is too low Contact local gas company...
- Page 16 PARTS LIST AND DIAGRAM MODEL: MHVFRD20NGBT, MHVFRD20NGT ITEM PART DESCRIPTION ITEM PART DESCRIPTION Thermostat Valve Mounting 80094 Wire Guard 80010 Bracket 80096 Front Panel (Beige) 80011 Igniter Module Mounting Bracket 80205 Front Panel (White) 80058 Floor Mounting Feet (Beige) 80086...
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Page 17: Parts List And Diagram
PARTS LIST AND DIAGRAM MODEL: MHVFRD30NGBT, MHVFRD30NGT ITEM PART DESCRIPTION ITEM PART DESCRIPTION Thermostat Valve Mounting 80041 Wire Guard 80010 Bracket 80065 Front Panel (Beige) 80011 Igniter Module Mounting Bracket 80208 Front Panel (White) 80058 Floor Mounting Feet (Beige) 80023 Reflector 80214 Floor Mounting Feet (White) - Page 18 PARTS LIST AND DIAGRAM MODEL: MHVFBF20NGBT, MHVFBF20NGT ITEM PART DESCRIPTION ITEM PART DESCRIPTION 80122 Wire Guard 80014 Igniter Wire 80096 Front Panel (Beige) 80019 Igniter Module 80205 Front Panel (White) 80011 Igniter Module Mounting Bracket Thermostat Valve Mounting 80087 Reflector 80010 Bracket 80088...
- Page 19 PARTS LIST AND DIAGRAM MODEL: MHVFBF30NGBT, MHVFBF30NGT ITEM PART DESCRIPTION ITEM PART DESCRIPTION 80123 Wire Guard 80014 Igniter Wire 80065 Front Panel (Beige) 80019 Igniter Module 80208 Front Panel (White) 80011 Igniter Module Mounting Bracket Thermostat Valve Mounting 80025 Reflector 80010 Bracket 80029...
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Page 20: Warranty
Mr. Heater, Inc. warrants its heaters and accessories to be free from defects in material and workmanship for a period of 1 year from date of purchase. Mr. Heater, Inc. will repair or replace this product free of charge if it has been proven to be defective within the 1-year period, and is returned at customer expense with proof of purchase to Mr.