Use and Care Manual

ManualsBrandsMr. Heater ManualsGas Heaters30,000 BTU Vent Free Blue Flame Natural Gas Heater

MR. HEATER, INC., 4560 W. 160

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

WARNING: If the information in this manual is not followed exactly, a re or explosion may result causing

property damage, personal injury, or loss of life.

- Do not store or use gasoline or other 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 re department.

- Installation and service must be performed by a qualied installer, service agency, or the gas supplier.

WARNING: This is an unvented gas-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 qualied installer, service agency, or gas supplier.

2016 - 70808 - CB

Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference.

UNVENTED NATURAL GAS FIRED ROOM HEATER

Blue Flame Heaters

MHVFB20TB NG

(BLOWER INCLUDED)

MHVFB20T NG

(BLOWER SOLD SEPARATELY)

MHVFB30TB NG

(BLOWER INCLUDED)

MHVFB30T NG

(BLOWER SOLD SEPARATELY)

Plaque Heaters

MHVFR20TB NG

(BLOWER INCLUDED)

MHVFR20T NG

(BLOWER SOLD SEPARATELY)

MHVFR30TB NG

(BLOWER INCLUDED)

MHVFR30T NG

(BLOWER SOLD SEPARATELY)

OPERATING INSTRUCTIONS

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.

Summary of content (20 pages)

PAGE 1
Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference. OPERATING INSTRUCTIONS 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.
PAGE 2
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. WARNINGS • IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this heater.
PAGE 3
SPECIFICATIONS **Operating heater above elevations of 4,500 feet could cause pilot/ODS to shutdown heater.** - MHVFR20TBNG - MHVFR20TNG - MHVFR30TBNG - MHVFR30TNG - MHVFB20TBNG - MHVFB20TNG - MHVFB30TBNG - MHVFB30TNG 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 Ignition Battery ignitor (1-AA) Battery ignitor (1-AA) Battery ignitor (1-AA) Battery ignitor (1-AA) Pressure Regulator Setting 4.
PAGE 4
Product Features FRESH AIR FOR COMBUSTION AND VENTILATION Ignitor Button Fan Blower Switch WARNING: This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.
PAGE 5
*Adjoining rooms are communication only if there are odorless passageways or ventilation grills between them. Air From Inside Building (Figure 2). B. Vent room directly to the outdoors. See Ventilation Air From Outdoors (Figure 3). C. Install a lower Btu/hr heater if lower Btu/hr size makes room unconfined. If actual Btu/hr used is less than the maximum Btu/ hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.
PAGE 6
*A CSA/AGA certified equipment shutoff valve with 1/8” NPT tap is an acceptable alternative to test gauge connection. Purchase a CSA/AGA certified equipment shutoff valve from your dealer. WARNING: Rework worksheet, adding the space of the adjoining unconfined space. The combined space must have enough fresh air to supply all appliance in both spaces. LOCATING HEATER Ventilation from Outdoors This heater is designed to be mounted on the wall.
PAGE 7
1. Attach to wall studs 2. Attach to wall anchor Attaching to Wall Stud: This way is the best providing the strongest mounting in wood frame houses. 36” min. from ceiling SEE CLEARANCE SPECIFICATIONS ON PG. 3 Left Side Attaching to Wall Anchor: This way allows you to attach mounting bracket to hollow walls (wall areas between studs) or to solid walls (concrete or masonry). Decide which way best suits your needs. Either method will provide a secure hold for the mounting bracket. Right Side 1.
PAGE 8
1. Drill holes at marked locations using 5/16” drill bit. For solid walls (concrete or masonry), drill at least 1” deep. 2. Fold wall anchor as shown in figure 8 below. 4. If installing bottom mounting screw into hollow or solid wall, install wall anchors. Follow steps 1 through 4 under Attaching to Wall using Anchor. If installing bottom mounting screw into wall stud, drill holes at marked locations using 9/64” drill bit. 5. Re-place heater onto mounting bracket. 6.
PAGE 9
cleaning. A sediment trap traps moisture and contaminants. This keeps them from going into heater. If sediment trap is not installed or is installed improperly, heater may not run correctly. IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings. WARNING: This appliance requires a 3/8” NPT (National Pipe Thread) inlet connection to the pressure regulator. Use of floor mounting feet will require you to use a 3/8 NPT street elbow to make gas connection.
PAGE 10
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 figure 13). 4. Open main gas valve on or near gas meter. 5. Check all joints from equipment shutoff valve to control valve (see figure 14). Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak. 6. Correct all leaks at once. 7.
PAGE 11
THERMOSTAT CONTROL OPERATION technician to inspect the appliance and to replace any part of the control system which has been underwater. FOR IR20NGT / IR30NGT: The thermostatic control used simply turns on and off the burner. FOR BF20NGT / BF30NGT: The thermostatic control used modulates the flame size as the temperature gets closer to set point, then it turns off the burner upon reaching temperature. The burner will cycle back on when room temperature drops below the set temperature.
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). With the unit off, lightly blow air through the air inlet hole. You may blow through a drinking straw if compressed air is not available. Pilot Air Inlet Hole Note: Your heater may have either pilot assembly.
PAGE 13
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PAGE 14
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. If screen or grille guard is removed for servicing it must be replaced prior to operating the heater.
PAGE 15
Burner does not light after ODS/pilot is lit 1. Burner orifice is clogged 2. Burner orifice diameter to small 3. Inlet gas pressure is too low 1. Clean burner orifice (see Cleaning and Maintenance on pages 11 and 12), or replace burner orifice 2. Replace burner orifice 3. Contact local gas company Delayed ignition of burner 1. Manifold pressure is too low 2. Burner orifice is clogged 1. Contact local gas company 2.
PAGE 16
MHVFB20TB NG MHVFB20T NG MHVFB30TB NG MHVFB30T NG 24 3 1-1 42 14 9 7 1-4 22-1 11 29 Blower not included on all units 45 10 20 5 33-1 15 26 8 4 6 22-3 1-2 22-2 1-3 13 16 27-2 28-2 25 2 23 44 MHVFR20TB NG MHVFR20T NG 24 MHVFR30TB NG MHVFR30T NG 1-1 3 42 9 1-4 7 11 45 26 33-1 8 35 10 20 29 Blower not included on all units 22-1 38 5 6 39 22-3 1-3 4 16-2 22-2 27-1 28-1 16-1 16 21 18 36 1-2 2 25 23 13 44 Unvented Natural Gas Vent Free Room Heaters 16 Ins
PAGE 17
For all models, Equipment shutoff valve with 1/8” NPT tap. MHVFB20TB NG, MHVFB20T NG, MHVFB30TB NG, MHVFB30T NG, MHVFR20TB NG, MHVFR20TNG, MHVFR30TB NG, MHVFR30T NG • 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. ITEM PART NO. MHFR20 NG DESCRIPTION QTY.
PAGE 18
ITEM PART NO. DESCRIPTION QTY.
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PAGE 20
OPERATING INSTRUCTIONS 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. WARNING: USE ONLY MANUFACTURER’S REPLACEMENT PARTS. USE OF ANY OTHER PARTS COULD CAUSE INJURY OR DEATH. REPLACEMENT PARTS ARE ONLY AVAILABLE DIRECT FROM THE FACTORY AND MUST BE INSTALLED BY A QUALIFIED SERVICE AGENCY.