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Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference.
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.
Plaque Heaters
MHVFR20TB LP
(BLOWER INCLUDED)
MHVFR20T LP
(BLOWER SOLD SEPARATE)
MHVFR30TB LP
(BLOWER INCLUDED)
MHVFR30T LP
(BLOWER SOLD SEPARATE)
UNVENTED LP-GAS FIRED ROOM HEATER
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
• 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 fire department.
- Installation and service must be performed by a qualified installer, service agency, or the gas supplier.
WARNING: 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.
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 qualified installer, service agency, or gas supplier.
OPERATING INSTRUCTIONS
AND OWNER'S MANUAL
MR. HEATER, INC., 4560 W. 160
TH
ST., CLEVELAND, OHIO 44135 · 800-251-0001
Blue Flame Heaters
MHVFB20TB LP
(BLOWER INCLUDED)
MHVFB20T LP
(BLOWER SOLD SEPARATE)
MHVFB30TB LP
(BLOWER INCLUDED)
MHVFB30T LP
(BLOWER SOLD SEPARATE)
2016 - 70809 - CB
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Summary of Contents for Mr. Heater MHVFR20T LP
- Page 1 Refer to this manual for correct installation and operational procedures. For assistance or additional information consult a qualified installer, service agency, or gas supplier. 2016 - 70809 - CB MR. HEATER, INC., 4560 W. 160 ST., CLEVELAND, OHIO 44135 · 800-251-0001...
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Page 2: Table Of Contents
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. *Aftermarket completion of sale, not for the purpose of resale, from the manufacturer. -
Page 3: Specifications
SPECIFICATIONS **Operating heater above elevations of 4,500 feet could cause pilot/ODS to shutdown heater - MHVFR20TB LP - MHVFR30TB LP - MHVFB20TBLP - MHVFB30TB LP - MHVFR20T LP - MHVFR30T LP - MHVFB20T LP - MHVFB30T LP BTU (Available) 20,000... -
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 Control Knob Switch a confined space or unusually tight construction (located on back unless provisions are provided for adequate of heater) combustion and ventilation air. -
Page 5: Determining The Type Of Heater Location Space
*Adjoining rooms are communication only if there Air From Inside Building (Figure 2). are odorless passageways or ventilation grills B. Vent room directly to the outdoors. See Ventilation between them. Air From Outdoors (Figure 3). DETERMINING THE TYPE OF HEATER C. -
Page 6: Installation
*A CSA/AGA certified equipment shutoff valve with WARNING: Rework worksheet, adding the space 1/8” NPT tap is an acceptable alternative to test gauge of the adjoining unconfined space. The combined connection. Purchase a CSA/AGA certified equipment space must have enough fresh air to supply all shutoff valve from your dealer. -
Page 7: Fastening Heater To Wall
1. Attach to wall studs 2. Attach to wall anchor Attaching to Wall Stud: This way is the best providing the strongest mounting in 36” min. from wood frame houses. ceiling CLEARANCE Attaching to Wall Anchor: SPECIFICATIONS ON PG. 3 This way allows you to attach mounting bracket to hol- low walls (wall areas between studs) or to solid walls (concrete or masonry). -
Page 8: Floor Mounting Away From Wall
1. Drill holes at marked locations using 5/16” drill 4. If installing bottom mounting screw into hollow bit. For solid walls (concrete or masonry), drill or solid wall, install wall anchors. Follow steps 1 at least 1” deep. through 4 under Attaching to Wall using Anchor. If installing bottom mounting screw into wall 2. - Page 9 WARNING: This appliance requires a 3/8” NPT CAUTION: Use pipe joint sealant that is resistant to (National Pipe Thread) inlet connection to the LP-Gas. pressure regulator. Use of floor mounting feet will Install sediment trap in supply line as shown in figure require you to use a 3/8 NPT street elbow to make 12.
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Page 10: Operating Your Heater
4. Correct all leaks at once. 5. Depressurize and relieve pressure from supply piping system. Pressure Testing Heater Gas Connections: 1. Make sure that the heater supply piping sys- tem is connected and has been leak tested as described above. 2. -
Page 11: Cleaning And Maintenance
push in or turn by hand, don’t try to repair it call 9. To select the desired heat level, turn the a qualified service technician or gas supplier. temperature setting knob counterclockwise to Force or attempted repair may result in a fire or between 1 &... - Page 12 A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly. To clean the pilot assembly find the small pilot air inlet hole about two inches from where the pilot flame comes out of the pilot assembly (see figure 25).
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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 Burner does not light after ODS/pilot is lit 1. Burner orifice is clogged 1. Clean burner orifice (see Cleaning and 2. Burner orifice diameter to small Maintenance on page 11), or replace 3. Inlet gas pressure is too low burner orifice 2.
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Page 16: Exploded-View Parts Drawing
MHVFB20T LP MHVFB30TB LP MHVFB30T LP Blower not included on all 22-1 units 33-1 22-3 22-2 27-2 28-2 MHVFR20TB LP MHVFR20T LP MHVFR30TB LP MHVFR30T LP Blower not included on all units 33-1 22-1 22-3 22-2 27-1 16-1 28-1 16-2 Unvented LP-Gas Vent Free Room Heaters Installation Instructions and Owner’s Manual... -
Page 17: Parts List
For all models, Equipment shutoff valve with 1/8” NPT tap. MHVFB20TB LP, MHVFB20T LP, MHVFB30TB LP, MHVFB30T LP, MHVFR20TB LP, MHVFR20T LP, MHVFR30TB LP, MHVFR30T LP • PARTS LIST This list contains replacement parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 20 of this manual. - Page 18 ITEM PART NO. DESCRIPTION QTY. MHFR20 LP MHFB20 LP MHFR30 LP MHFB30 LP – – – – – – – – Burner Plaques, 30 – – Burner Plaques, 20 – – Plaques Gasket, 30 – – Plaques Gasket, 20 70701 70701 70701 70701...
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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.
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