Mr Heater MH4B Portable Radiant Buddy Heater Owner’s Manual

: June 6, 2024
: MR Heater

Table of Contents

FOR US SALE EXCEPT MASSACHUSETTS
GENERAL SAFETY INSTRUCTIONS
GENERAL INFORMATION
LIGHTING / OPERATING INSTRUCTIONS
MAINTENANCE
- CLEANING INSTRUCTIONS
TROUBLESHOOTING INFORMATION
Mr. Heater MH4B
PARTS LIST
PORTABLE RADIANT BUDDY HEATER
PARTS ORDERING INFORMATION
LIMITED WARRANTY
Documents / Resources

Mr Heater MH4B Portable Radiant Buddy Heater

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.

PORTABLE PROPANE HEATER FOR RECREATIONAL, COMMERCIAL AND EMERGENCY INDOOR USE

FOR US SALE EXCEPT MASSACHUSETTS

Use only Mr. Heater branded accessories (Check down below for WARNING information)

| 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.
— An LP cylinder not connected for use shall not be stored in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS

Do not try to light appliance.
Extinguish any open flame.
Shut off gas to appliance.

— Service must be performed by a qualified service agency

This is an unvented gas-fired portable heater. It uses air (oxygen) from the area in which it is used. Adequate combustion and ventilation air must be provided. Check down below.

| | WARNING: Every time hose or tank is connected to unit, connection must be checked for leaks in one or more ways: Apply soapy water to connection, look for bubbles, listen for hiss of escaping gas, feel for extreme cold, smell for rotten egg odor. Do not use if leaking!
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| WARNING: Any changes to this heater or its controls can be dangerous.
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| WARNING: Early signs of carbon monoxide poisoning resemble the flu, with headache, dizziness and/ or nausea. If you have these signs, heater may not be working properly. Get fresh air at once! Have heater serviced.
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| WARNING: If the recreational or commercial enclosure does not have a window or roof vent, DO NOT USE THIS HEATER INSIDE.
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THE STATE OF CALIFORNIA REQUIRES THE FOLLOWING WARNINGS:
WARNING: Combustion by-products produced when using this product contain carbon monoxide, a chemical known to the State of California to cause cancer and birth defects (or other reproductive harm).
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
NOTICE: Not for use in a “dwelling home” in California.

GENERAL SAFETY INSTRUCTIONS

THIS IS A HEATING APPLIANCE. DO NOT OPERATE THIS APPLIANCE WITHOUT THE FRONT WIRE GUARD INSTALLED. DO NOT ATTEMPT TO WARM OR COOK FOOD ON THIS HEATER

Do not use non-approved attachments on this heater.
Due to high temperatures, the appliance should be located out of traffic and away from combustible materials.
Children and adults should be alerted to the hazard of high surface temperatures and should stay away to avoid burns or clothing ignition.
Young children should be carefully supervised when they are near the appliance.
Do not place clothing or other flammable material on or near the appliance.
Do not operate heater in any moving vehicle.
This heater can only be used in a recreational or commercial enclosure with a window or roof vent. It may also be used outdoors.
This heater requires a vent area of 4 square inches (example 2” x 2” opening) minimum for adequate ventilation during operation. Do not use other fuel burning appliances inside.
GAS PRESSURE AT HEATER IS REGULATED AND FIXED AT 11” W.C.
REGULATOR IN HEATER MUST ALWAYS BE IN PLACE DURING OPERATION.
Any safety screen or guard removed for servicing the appliance must be replaced prior to operating the heater.
The appliance should be inspected before each use.
Frequent cleaning may be required. The control compartments, burner and circulating air passageways of the appliance must be kept clean, see MAINTENANCE.
DO NOT use this heater if any part has been under water. Immediately call a qualified service technician to inspect the heater and to replace any part of the control system and any gas control, which has been under water.
When used without adequate combustion and ventilation air, this heater may give off excessive CARBON MONOXIDE, an odorless, poisonous gas.
Some people – pregnant women, persons with heart or lung disease, anemia, those under the influence of alcohol, those at high altitudes – are more affected by carbon monoxide than others
When heater is placed on the ground, make sure the ground is level and keep any objects at least 24 inches from the front of the heater. THIS HEATER IS EQUIPPED WITH A TIP OVER SWITCH THAT WILL SHUT THE HEATER OFF IF THE HEATER TIPS OVER HOWEVER, DO NOT LEAVE HEATER UNATTENDED OR WHERE CHILDREN MAY CAUSE THE HEATER TO TIP OVER. NEVER OPERATE THE HEATER WHILE SLEEPING!

GENERAL INFORMATION

This heater is safe for indoor use in small recreational enclosures, having means for providing combustion air and ventilation, such as enclosed porches, cabins, fishing huts, trailers, tent trailers, tents, truck caps and vans.
It may be used for emergency indoor heating when connected to a disposable 1 lb. propane cylinder and for indoor use in commercial enclosures, having means for providing combustion air and ventilation, such as construction trailers or temporary work enclosures.
Note: The heater can be used outdoors, but may experience nuisance shutoffs due to certain wind conditions.
When the heater is cold or at room temperature, it will take a few minutes for the burner tile to turn bright orange. This is normal and the heater is working properly. If burner tile is visibly flaming, turn heater off and call a qualified service technician.
When the unit is lit, there should be about a quarter inch (1/4”) border around the tile that will not turn bright orange. This is normal.
When operating the heater for the first time, the top area of the reflector may discolor. This is also normal and is no reason for concern.
When operating the heater at altitudes over 7,000 FT. above sea level, the unit may not burn as bright as in lower altitudes. This is normal. At higher altitudes, the heater may shut-off. If this happens, provide fresh air, wait 5 minutes and re-light. Due to local atmospheric conditions heater may not re-light.
Operating time will be approximately 5 hours on a one 1lb. cylinder. Due to the properties of LP gas, runtimes can be significantly reduced when operating continuously at temperatures below 20ºF.
This heater is equipped with a tip-over safety switch.
Nuisance shut-downs may be experienced if the unit is bumped or moved. if this occurs simply relight the heater.
Due to natural operation of small tanks, condensation may build up on tank and drip on surface under heater.
Sometimes this condensation may freeze due to the extreme cold caused when propane vaporizes. This is normal and no reason for alarm.

LIGHTING / OPERATING INSTRUCTIONS

WARNING: Always inspect propane cylinder and heater propane connections for damage, dirt, and debris before attaching propane cylinder. Do not use if head of cylinder is damaged, punctured or deteriorated.

ALWAYS ATTACH OR DETACH CYLINDER OUTDOORS AWAY FROM FLAMES, OTHER IGNITION SOURCES, AND ONLY WHEN HEATER IS COOL TO TOUCH. NEVER SMOKE WHEN ATTACHING OR REMOVING PROPANE CYLINDER OR MAKING REMOTE CONNECTIONS!

Use only LP-gas cylinders marked in accordance with the U.S. Dept. of Transportation (DOT).
Use only 16.4 oz. (1 lb.) disposable cylinders that mate with No. 600 valve connection.
Heater and attached cylinder must be in an upright position during operation.
Screw 1 lb. disposable LP-gas supply cylinder clockwise (from bottom) into portable heater until hand-tight and fit cylinder into stand. Do not use thread sealant on this connection.
Check cylinder connection for leaks with soapy water at the threaded connection under the domed plastic cover where the cylinder screws into the regulator. SEE WARNING! ON PLASTIC COVER.
Depress “ON” button to light pilot flame (repeat until pilot lights) and continue to hold for 30-60 seconds.
After lighting pilot, release “ON” button to light heater.
To shut off heater, press the “OFF” button.
CAUTION: After turning heater off, wire guard will remain hot. Allow to thoroughly cool before storing.
Do not operate, store or remove cylinder near flammable items or ignition sources.
LP-GAS CYLINDERS MUST BE DISCONNECTED FROM HEATER WHEN NOT IN USE!

MAINTENANCE

Always keep the heater area clear and free from combustible materials, gasoline and other flammable vapors and liquids.

Keep the vent areas (slots in the bottom and top of the heater) clear at all times.

Visually inspect the pilot flame and burner periodically during use. The pilot flame should be blue in color (not yellow) and will extend to the thermocouple. The flame will surround the thermocouple just below the tip, see Figure 2.

A slight yellow flame may occur where the pilot flame and main burner flame meet. The burner should be bright orange (with a slight blue color around the border, a red orange haze that is visible on the ceramic tile is acceptable) and without a noticeable flame.

A blue flame that rolls out at the top of the ceramic tile indicates an accumulation of dust, lint or spider webs inside the housing assembly and main burner assembly. If the pilot is yellow or the burner has a noticeable flame, cleaning may be required. Use the following procedure to inspect the casing assembly and main burner assembly. It is necessary to periodically check the burner orifice and burner venture to make sure that they are clear of things such as insect nests and spider webs that may accumulate over time. A clogged tube can lead to a fire.

CLEANING INSTRUCTIONS

Allow heater to thoroughly cool before performing any maintenance.
Remove disposable 1 lb. propane cylinder from heater.
Remove right side plastic service panel (ref.5) by removing the six screws holding it in place.
Inspect the interior of casing for accumulation of dust, lint or spider webs. If necessary, clean the interior of the casing assembly with a vacuum cleaner or compressed air (max 30 psi). Do not damage any components within the casing assembly when you are cleaning.
Inspect and clean main burner (ref. 13) and orifice (ref. 3) by using a vacuum or compressed air (max 30 psi).
Inspect and clean pilot tube (ref. 14). Insert a doubled over pipe cleaner into the pilot tube until it bottoms against the pilot orifice (approximately 2”). Rotate the pipe cleaner a couple of times and remove. Blow out the remaining debris using compressed air.
WARNING: Never use needles, wires or similar cylindrical objects to clean the pilot to avoid damaging the calibrated ruby that controls the gas flow through the pilot orifice.
Apply compressed air (max 30 psi) into the ceramic tile of burner assembly and venture tube (ref. 13) to remove dust, lint and spider webs.
Reinstall the right side plastic service panel.

TROUBLESHOOTING INFORMATION

If Spark electrode does not produce spark.
CHECK

Spark electrode broken – replace.
Igniter wire may not be attached to spark electrode.– attach
Igniter wire damaged – replace.
Piezo igniter defective – replace gas valve assembly.

If Spark electrode produces spark but pilot does not light.
CHECK

No gas to heater – re-install or replace gas cylinder.
Pilot is blocked from spider web or dirt – clean pilot, see MAINTENANCE.

If Pilot flame does not stay lit when button is released.
CHECK

“Pilot/Ignition” button not held long enough to purge air from line.
Pilot flame not surrounding thermocouple – clean pilot, see MAINTENANCE.
Pilot Assembly defective – replace.
Tip switch wires disconnected – connect tip switch (check off switch and off switch wiring).

If Main burner does not ignite.
CHECK

Main burner orifice is blocked – clean burner, see MAINTENANCE.

If Heater keeps shutting “OFF” during normal operation.
CHECK

Pilot is blocked – clean pilot, see MAINTENANCE.
Provide minimum fresh air opening of 4 square inches (example 2” x 2” opening).
Tip over switch activated from bumping heater. Re-light

Mr. Heater MH4B

PARTS LIST

SEE BACK PAGE FOR PARTS ORDERING INFORMATION

ITEM NO.| PART NUMBER| ****

DESCRIPTION

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1| 15161| Regulator/Valve Assembly| 1
2| 15151| Orifice| 1
3| 15163| Off Button Wire| 1
4| 15126| Left Housing| 1
5| 15128| Right Service Housing| 1
6| 15122| On Button| 1
7| 15123| Off Button| 1
8| 15165| Off Button Spring| 1
9| 15124| Tank Base| 1
10| 15157| Reflector Panel| 1
1| 15158| Reflector Ring| 1
12| 15162| Wire Guard| 1
13| 15138| Burner Assembly| 1
14| 15155| ODS/Pilot Assembly| 1
15| 15153| Burner Bracket| 1
16| 15145| Off Switch| 1
17| 73403| Tipover Switch| 1
18| 15148| Pilot Fuel Line| 1
19| 15154| Heat Shield| 1
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PORTABLE RADIANT BUDDY HEATER

| Model #
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MH4B
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.
WARNING:
THIS PRODUCT IS A HEATER. IT IS CERTIFIED TO CSA INTERNATIONAL REQUIREMENT SECTION 4.98, “GAS FIRED PORTABLE HEATERS FOR RECREATIONAL OR COMMERCIAL USE.” THIS PRODUCT IS NEVER TO BE USED FOR THE COOKING OR WARMING OF FOODS AS DOING SO CAN INTERFERE WITH THE SAFETY SYSTEMS OF THE HEATER, WHICH MAY RESULT IN A FIRE, EXPLOSION, THE PRODUCTION OF DEADLY CARBON MONOXIDE, AND PERSONAL INJURY OR DEATH TO YOU OR OTHERS. NEVER USE HAND-MADE OR THIRD PARTY ACCESSORIES OR ATTACHMENTS WITH THIS HEATER; THIS IS EXTREMELY DANGEROUS AND MAY RESULT IN PERSONAL INJURY OR DEATH TO YOU OR OTHERS.

PARTS ORDERING INFORMATION

PURCHASING: Accessories may be purchased at any Mr. Heater local dealer or direct from the factory
FOR INFORMATION REGARDING SERVICE
Please call Toll-Free 800-251-0001 www.mrheater.com Our office hours are 8:00 AM – 5:00 PM, EST, Monday through Friday. Please include the model number, date of purchase, and description of problem in all communication

LIMITED 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. Heater, Inc. within the warranty period. DISCLAIMER: This warranty does not cover any product that: a) has been subject to misuse or neglect; b) has been used in a manner inconsistent with the warnings and instructions contained in the owner’s manual, including but not limited to using a heater for the cooking or warming of foods; or c) has been used with hand-made or third party accessories or attachments. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state

Mr. Heater, Inc. reserves the right to make changes at any time, without notice or obligation, in colors, specifications, accessories, materials and models
PRODUCT REGISTRATION: Thank you for your purchase. Please log in to http://www.egiregistration.com to register your product.

MR. HEATER, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 •800-251-0001
Mr. Heater and Portable Buddy are registered trademarks of Enerco Group, Inc.
© 2017, Enerco/Mr. Heater. All rights reserved

www.mrheater.com

Documents / Resources

| Mr Heater MH4B Portable Radiant Buddy Heater [pdf] Owner's Manual
MH4B, Portable Radiant Buddy Heater, Radiant Buddy Heater, Buddy Heater, Heater
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