Mr. Heater MHVFRD20NGBT Operating Instructions And Owner's Manual
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Mr. Heater MHVFRD20NGBT Operating Instructions And Owner's Manual

Unvented natural gas fired room heater
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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.
INSTALLER: Leave this manual with the appliance. CONSUMER: Retain this manual for future reference.
UNVENTED NATURAL GAS FIRED ROOM HEATER
Plaque Heaters
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 fi re or explosion may result causing
property damage, personal injury, or loss of life.
- Do not store or use gasoline or other fl ammable vapors and liquids in the vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Shut off gas supply
• Do not try to light any appliance
• Do not touch an 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 fi re department.
- Installation and service must be performed by a qualifi ed installer, service agency, or the gas supplier.
WARNING: This is an unvented gas-fi red 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.
WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property
damage. Refer to this manual for correct installation and operational procedures. For assistance or additional
information consult a qualifi ed installer, service agency, or gas supplier.
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.
OPERATING INSTRUCTIONS
AND OWNER'S MANUAL
MR. HEATER, INC., 4560 W. 160
TH
ST., CLEVELAND, OHIO 44135 · 800-251-0001
Blue Flame Heaters
MHVFBF20NGBT
(BLOWER INCLUDED)
MHVFBF20NGT
(BLOWER SOLD SEPARATE)
MHVFBF30NGBT
(BLOWER INCLUDED)
MHVFBF30NGT
(BLOWER SOLD SEPARATE)
2016 - CB

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Summary of Contents for Mr. Heater MHVFRD20NGBT

  • 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. 160 ST., CLEVELAND, OHIO 44135 · 800-251-0001...

  • Page 2: Table Of Contents

    CONTENTS SOCIAL MEDIA WARNINGS ................2 In order to provide the best service possible Mr. Heater is now giving you more ways to get in touch with us: SPECIFICATIONS ..............3 WEBSITE: Mr. HeaterÊs full line of product are now at: PRECAUTIONS ..............3...

  • Page 3: Specifications

    SPECIFICATIONS **Operating heater above elevations of 4,500 feet could cause pilot/ODS to shutdown heater.** MHVFRD20TB / MHVFRD30TB / MHVFBF20TB / MHVFBF30TB / MHVFRD20T NG MHVFRD30T NG MHVFBF20 NG MHVFBF30T NG BTU (Available) 20,000 30,000 20,000 30,000 Type of Gas Natural Gas Only Natural Gas Only Natural Gas Only Natural Gas Only...

  • Page 4: Ignition System Battery Installation

    Product Features FRESH AIR FOR COMBUSTION AND VENTILATION Ignitor Button WARNING: This heater shall not be installed in Fan Blower Switch a confi ned space or unusually tight construction Control Knob (located on back of unless provisions are provided for adequate heater) combustion and ventilation air.

  • Page 5: Determining The Type Of Heater Location Space

    *Adjoining rooms are communication only if there B. Vent room directly to the outdoors. See Ventilation are odorless passageways or ventilation grills be- Air From Outdoors (Figure 3). tween them. C. Install a lower Btu/hr heater if lower Btu/hr size DETERMINING THE TYPE OF HEATER makes room unconfi...

  • Page 6: Installation

    WARNING: Rework worksheet, adding the space *A CSA/AGA certifi ed equipment shutoff valve with of the adjoining unconfi ned space. The combined 1/8” NPT tap is an acceptable alternative to test gauge space must have enough fresh air to supply all ap- connection.

  • 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” (254cm) 36” min. from This way allows you to attach mounting bracket to hol- from sides ceiling low walls (wall areas between studs) or to solid walls (concrete or masonry).

  • Page 8: Floor Mounting Away From Wall

    2. Fold wall anchor as shown in fi gure 8 below. stud, drill holes at marked locations using 9/64” drill bit. 5. Re-place heater onto mounting bracket. 6. Place spacers between bottom mounting holes and wall anchor or drilled hole. 7.
  • Page 9 CAUTION: Never connect heater to private (non- CHECKING GAS CONNECTIONS utility) gas well. This gas is commonly known as well- WARNING: Test all gas piping and connections for head gas. leaks after installing or servicing. Correct all leaks IMPORTANT: Check your gas line pressure before at once.

  • Page 10: Operating Your Heater

    Pressure Testing Heater Gas Connections: 1. Make sure that the heater supply piping system is connected and has been leak tested as described above. 2. Make sure control knob of heater is in OFF position. 3. Open equipment shutoff valve (see fi gure 13). 4.
  • Page 11 D. Do not use this appliance if any part has been THERMOSTAT CONTROL OPERATION underwater. Immediately call a qualifi ed service FOR IR20NGT / IR30NGT: The thermostatic control technician to inspect the appliance and to used simply turns on and off the burner. replace any part of the control system which FOR BF20NGT / BF30NGT: The thermostatic control has been underwater.

  • Page 12: Cleaning And Maintenance

    CLEANING HEATER CABINET CLEANING AND MAINTENANCE WARNING: Turn off heater and let cool before Air passageways servicing. • Use a vacuum cleaner or pressurized air to CAUTION: You must keep control areas, burner clean and circulation air passageways of heater clean. Exterior Inspect these areas of heater before use.

  • Page 13: Troubleshooting

    TROUBLESHOOTING NOTE: All troubleshooting items are listed in order of operation and likely occurrence. WARNING: Only a qualifi ed 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 14 Burner does not light after ODS/pilot is lit 1. Burner orifi ce is clogged 1. Clean burner orifi ce (see Cleaning and 2. Burner orifi ce diameter to small Maintenance on pages 11 and 12), or 3. Inlet gas pressure is too low replace burner orifi...
  • Page 15 This page intentionally left blank. Installation Instructions and Owner’s Manual Unvented Natural Gas Vent Free Room Heaters...

  • Page 16: Exploded-View Parts Drawing

    PARTS LIST AND DIAGRAM MODEL: MHVFBF20NGBT / MHVBFD20NGT ITEM PART DESCRIPTION ITEM PART DESCRIPTION 80094 Wire Guard 80081 Thermostat Valve 80096 Front Panel 80010 Thermostat Mounting Bracket 80086 Reflector 80098 Back Heat Shield 80088 Front Heat Shield 80059 Floor Mount Feet 80093 Glass 80097...

  • Page 17: Parts List

    PARTS LIST AND DIAGRAM MODEL: MHVFBF30NGBT / MHVBFD30NGT ITEM PART DESCRIPTION ITEM PART DESCRIPTION 80041 Wire Guard 80081 Thermostat Valve 80065 Front Panel 80010 Thermostat Mounting Bracket 80025 Reflector 80067 Back Heat Shield 80029 Heat Shield 80058 Floor Mount Feet 80039 Glass 80066...
  • Page 18 PARTS LIST AND DIAGRAM MODEL: MHVFRD20NGBT / MHVFRD20NGT ITEM PART DESCRIPTION ITEM PART DESCRIPTION 80094 Wire Guard 80010 Thermostat Mounting Bracket 80096 Front Panel 80098 Back Heat Shield 80086 Reflector 80058 Floor Mounting Feet 80057 ODS Assembly w/ Thermocouple (NG)
  • Page 19 PARTS LIST AND DIAGRAM MODEL: MHVFRD30NGBT / MHVFRD30NGT ITEM PART DESCRIPTION ITEM PART DESCRIPTION 80041 Wire Guard 80010 Thermostat Mounting Bracket 80065 Front Panel 80067 Back Heat Shield 80023 Reflector 80058 Floor Mounting Feet 80057 ODS Assembly w/ Thermocouple (NG) 80066 Back Panel 80032...

  • 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.

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