MR HEATER Forced Air Propane Construction Heater Owner’s Manual

: June 7, 2024
: MR Heater

MR HEATER Forced Air Propane Construction Heater Owner’s Manual

FORCED AIR PROPANE CONSTRUCTION HEATER

Featuring NEW QUIET BURNER TECHNOLOGY
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:

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. Refer to page-3

WARNING:

YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS, SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU OPERATE THIS HEATER.

GENERAL HAZARD WARNING:

FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONS PROVIDED WITH THIS HEATER, CAN RESULT IN DEATH, SERIOUS BODILY INJURY AND PROPERTY LOSS OR DAMAGE FROM HAZARDS OF FIRE, EXPLOSION, BURN, ASPHYXIATION, CARBON MONOXIDE POISONING, AND/OR ELECTRICAL SHOCK.
ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE INSTRUCTIONS SHOULD USE OR SERVICE THIS HEATER. IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS AN INSTRUCTIONS MANUAL, LABELS, ETC. CONTACT THE MANUFACTURER.

WARNING:

NOT FOR HOME OR RECREATIONAL VEHICLE USE

WARNING:

FIRE, BURN, INHALATION, AND EXPLOSION HAZARD. KEEP SOLID COMBUSTIBLES, SUCH AS BUILDING MATERIALS, PAPER OR CARDBOARD, A SAFE DISTANCE AWAY FROM THE HEATER AS RECOMMENDED BY THE INSTRUCTIONS. NEVER USE THE HEATER IN SPACES WHICH DO OR MAY CONTAIN VOLATILE OR AIRBORNE COMBUSTIBLES, OR PRODUCTS SUCH AS GASOLINE, SOLVENTS, PAINT THINNER, DUST PARTICLES OR UNKNOWN CHEMICALS

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.

SPECIFICATIONS

Type of Gas: For use with Propane Only Gas Supply Pressure
to regulator.. Max: 200 psi (1380 kPa) Min: 20 psi (137.9 kPa)
regulator out. 20 psi (137.9 kPa)
Electrical Input:. 115V, 60 Hz, 1Ø, 3a Minimum Operating Voltage: 100V
Ignition:. Manual, piezo igntion
Primary Flame Control: Thermocouple Operated Gas Valve
High Temperature Control: 240°F (116°C) Min. Ambient Temp. Rating 0°F (-17.8°C)
Model: 38QFA
Rating:. 38,000 BTU/hr (11.14 kW)
Fuel Consumption: 1.6 #/hr (.72 kg/hr)
Fuel Orifice Port No.:bb.. 1

OPERATING PRECAUTIONS

This is a propane, direct-fired, forced air heater. It’s intended use is primarily temporary heating of buildings under construction, alteration or repair.

Propane is heavier than air. If propane leaks from a connection or fitting, it sinks to the floor, collecting there with the surrounding air, forming a potentially explosive mixture. Obviously, propane leaks should be avoided, so set up the propane supply with utmost care. Read enclosed Odor Fade and Propane Sheet for additional information about detecting propane leaks. Leak check new connections or reconnections with a soap and water solution and follow all connection instructions herein. Also, ask your propane dealer for advice on the propane application and supply installation and ask him to check it if there are any questions.
This heater was designed and certified for use as a construction heater in accordance with ANSI Standard Z83.7/CGA 2.14. Check with your local fire safety authority if you have any questions about your applications. Other standards govern the use of fuel gases and heat producting products in specific applications. Your local authority can advise you about these.
Direct-Fired means that all of the combustion products enter the heated space. Even though this heater operates very close to 100 percent combustion efficiency, it still produces small amounts of carbon monoxide. Carbon monoxide (called CO) is toxic. We can tolerate small amounts but not a lot. CO can build up in a heated space and failure to provide adequate ventilation could result in death. The symptoms of inadequate ventilation are.

headache
dizziness
burning eyes and nose
nausea
dry mouth or sore throat

So, be sure to follow advice about ventilation in these operating instructions.
Forced Air means that a blower or fan pushes the air through the heater. Proper combustion depends upon this air flow; therefore, the heater must not be revised, modified or operated with
parts removed or missing. Likewise, safety systems must not be circumvented or modified in order to operate the heater.
When the heater is to be operated in the presence of other people the user is responsible for properly acquainting those present with the safety precautions and instructions, and of the hazards involved.

SAFETY PRECAUTIONS

Check the heater thoroughly for DO NOT operate a damaged heater.
DO NOT modify the heater or operate a heater which has been modified from its original
Use only propane
Use only VAPOR WITHDRAWAL propane If there is any question about vapor withdrawal, ask your propane dealer.
Mount the propane cylinders vertically (shutoff valve up). Secure them from falling or being knocked over and protect them from
Locate propane containers at least (USA) 7 (2.13m), (Canada) 10 ft. (3m) from the heater and do not direct exhaust toward containers.
IMPORTANT Use only the hose and regulator assembly provided with the heater. Match the color stripe on the hang tag attached to the hose assembly with the color on the label located near the propane inlet fitting on the Inspect hose assembly before each use of the heater. If there is excessive abrasion or wear, or hose is cut, replace with hose assembly listed on parts list before using heater.
For indoor use only. Area must be well ventilated. Provide minimum openings of 1/2 sq. ft. (.046 m ) near the floor and 1/2 ft. (.046 m ) near the ceiling (also see “Operating Precautions”).
If at any time gas odor is detected, IMMEDIATELY DISCONTINUE operation until the source of gas has been located and Read enclosed Odor fade and Propane Sheet for additional information about detecting propane leaks.
Install the heater such that is is not directly exposed to water spray, rain and/or dripping

1 . Maintain minimum clearance from normal combustible material (like paper) as follows: floor-0 ft. (0 m); outlet-6 ft. (1.83m); sides-2 ft. (.61m); top-6 ft. (1.83m). Locate 10 ft. (3m) from canvas or plastic tarpaulins or similar coverings and secure them to prevent flapping or movement due to wind action.

Due to the high surface and exhaust temperatures, adults and children must observe clearances to avoid burns or clothing
Operate only on a stable, level
Do not use with duct Do not restrict inlet or exit.
Use only the electrical power specified. The electrical connection and grounding must comply with National Electrical Code – ANSI/NFPA 70 (USA) and CSA C22.1 Canadian Electrical Code, Part 1 (Canada).
Use only a properly grounded 3-prong receptacle or extension cord (6 ft (1.83m) in length minimum).
Do not move, handle or service while hot or
Use only in accordance with local codes or, in the absence of local codes, with the Standard for the Storage and Handling of Liquefied Petroleum Gases ANSI/NFPA 58 and CSA 1, Natural Gas and Propane Installation Code.

ODOR FADE WARNING

WARNING

Asphyxiation Hazard

Do not use this heater for heating human living
Do not use in unventilated
The flow of combustion and ventilation air must not be
Proper ventilation air must be provided to support the combustion air requirements of the heater being
Refer to the specification section of the heater’s manual, heater dataplate, or contact the factory to determine combustion air ventilation requirements of the
Lack of proper ventilation air will lead to improper
Improper combustion can lead to carbon monoxide poisoning leading to serious injury or

Symptom of carbon monoxide poisoning can include headaches dizziness and difficulty in breathing.

FUEL GAS ODOR

LP gas and natural gas have man‑made odorants added specifically for

detection of fuel gas leaks.

If a gas leak occurs you should be able to smell the fuel gas. Since Propane (LP) is heavier than air you should smell for the gas odor low to the floor. ANY GAS ODOR IS YOUR SIGNAL TO GO INTO IMMEDIATE ACTION!

Do not take any action that could ignite the fuel gas. Do not operate any electrical Do not pull any power supply or extension cords. Do not light matches or any other source of flame. Do not use your telephone.
Get everyone out of the building and away from the area
Close all propane (LP) gas tank or cylinder fuel supply valves, or the main fuel supply valve located at the meter if you use natural
Propane (LP) gas is heavier than air and may settle in low When you have reason to suspect a propane leak, keep out of all low areas.
Use your neighbor’s phone and call your fuel gas supplier and your fire department. Do not re-enter the building or
Stay out of the building and away from the area until declared safe by the firefighters and your fuel gas

FINALLY, let the fuel gas service person and the firefighters check for escaped gas. Have them air out the building and area before you return. Properly trained service people must repair any leaks, check for further leakages, and then relight the appliance for you.

ODOR FADING ‑ NO ODOR DETECTED

Some people cannot smell Some people cannot smell the odor of the man-made chemical added to propane (LP) or natural gas. You must determine if you can smell the odorant in these fuel gases.
Learn to recognize the odor of propane (LP) gas and natural gas. Local propane (LP) gas dealers will be more than happy to give you a scratch and sniff Use it to become familiar with the fuel gas odor.
Smoking can decrease your ability to smell. Being around an odor for a period of time can affect your sensitivity to that particular Odors present in animal confinement buildings can mask fuel gas odor.
The odorant in propane (LP) gas and natural gas is colorless and the intensity of its odor can fade under some
If there is an underground leak, the movement of gas through the soil can filter the
Propane (LP) gas odor may differ in intensity at different Since Propane (LP) gas is heavier than air, there may be more odor at lower levels.
Always be sensitive to the slightest gas odor. If you continue to detect any gas odor, no matter how small, treat it as a serious leak. Immediately go into action as discussed previously..

ATTENTION ‑ CRITICAL POINTS TO REMEMBER!

Propane (LP) gas has a distinctive Learn to recognize these odors. (Reference Fuel Gas Odor and Odor Fading sections above.
Even If you are not property trained in the service and repair of the heater, ALWAYS be consciously aware of the odors of propane (LP) gas and natural
If you have not been properly trained in repair and service of propane (LP) gas then do not attempt to light heater, perform service or repairs, or make any adjustments to the heater on the propane (LP) gas fuel
A periodic sniff test around the heater or at the heater’s joints; e. hose, connections, etc., is a good safety practice under any conditions. If you smell even a small amount of gas, CONTACT YOUR FUEL GAS SUPPLIER IMMEDIATELY. DO NOT WAIT!

OPERATING INSTRUCTIONS

PREPARING FOR OPERATION

Check the heater for possible shipping If any is found, immediately notify the factory.
Follow all of the “Precautions”.
Connect the POL fitting of hose and regulator assembly to the propane cylinder by rotating the POL nut counterclockwise into the propane cylinder’s valve outlet and securely tighten with a
Connect the hose to the heater by rotating the hose fitting
Securely tighten all gas
Open the cylinder’s gas valve and check all gas connections with a soap and water DO NOT USE A FLAME.
Connect power cord to well-grounded 1 5V, 60 Hz, 1Ø source of
When using an extension cord, make certain that it is a 3-wire (grounded) cord of proper wire size, minimum length of 6 ft (1.83m).

START

1. THE HEATER POWER CORD MUST BE CONNECTED TO

A GROUNDED 115V, 60HZ, 1Ø POWER SOURCE BEFORE
HEATER IGNITION and always allow heater fan (blower) to run for 20 seconds to purge fuel.

Open propane supply valve on propane tank slowly. Note: If not opened slowly, excess-flow check valve on propane tank will stop gas flow. If this happens, close propane supply valve and open again Wait 15 seconds before Step 3.
Push and hold automatic control valve Push piezo igniter button repeatedly until the burner lights.
After the burner lights, keep the gas valve button depressed for 30 seconds then release and the heater will continue to

WARNING: Be sure motor and fan are running before pushing in automatic control valve button. Flames could flash outside heater or internal damage to heater may result if motor and fan are not running.

STOP

Securely close valve on the propane
Continue to operate heater until all fuel in the hose has
Unplug the power

CAUTION: Always shut off fuel supply before disconnecting electrical power.

RESTART AFTER SAFETY SHUTDOWN

Securely close valve at propane Unplug power cord.
Wait 5 minutes.
Restart following “START”

MAINTENANCE AND STORAGE

The heater should be inspected before each use, and at least annually by a qualified
Before each use, check the soft “O” ring seat at the bullnose of the POL fitting. If the “O” ring is cut, scuffed, or otherwise damaged, replace it with part number
Turn off the gas at the LP-gas supply cylinder(s) when the heater is not in
When the heater is to be stored indoors, the connection between the LP-gas supply cylinder(s) and the heater must be disconnected and the cylinder(s) removed from the heater and stored out of doors and in accordance with Chapter 5 of

the standard for Storage and Handling of Liquefied Petroleum Gases ANSI/NFPA 58 and CSA B149.1, Natural Gas and Propane Installation Code.

SERVICING

A hazardous condition may result if a heater is used that has been modified or is not functioning properly. When the heater is working properly:

The flame is contained within the
The flame is essentially blue with perhaps some yellow
There is no strong disagreeable odor, eye burning or other physical
There is no smoke or soot internal or external to the
There are no unplanned or unexplained shut downs of the

The parts lists and exploded view show the heater as it was constructed. Do not use a heater which is different from that shown. In this regard, use only the hose, regulator and cylinder connection fitting (called a POL fitting) supplied with the heater. IMPORTANT Match the color stripe on the hangtag attached to the hose assembly with the color on the label located near the propane inlet fitting on the heater. Do not use alternates. For this heater, the regulator must be set as shown in “specifications”. If there is any uncertainty about the regulator setting, have
A heater which is not working right must be repaired, but only by a trained, experienced service person.
In-warranty products will be repaired with no charge for either parts or labor. Please include a brief statement indicating date, place of purchase, the nature of the problem and proof of purchase. Out-of-warrranty products will be repaired with a charge for parts and labor.

SIZE AND CAPACITY OF PROPANE CYLINDERS REQUIRED

The charts below show the approximate size of the cylinder required for these heaters. To use the chart:

Select the lowest air temperature expected (at the bottom of the chart).
Move straight up to time of operation desired (left side of chart).
Read the cylinder size

All heaters should have: full cylinders good air circulation no frost on cylinders

BTU’S PER HOUR REQUIRED

WARRANTY

We are pleased that you have selected our product and take this opportunity to assure you that qualified service facilities are
available if required. With the cooperation of independent dealers, a nationwide network of authorized servicing dealers is available for your servicing requirements.
Should your product require servicing, read the section of the manual entitled “Servicing”.
Who gets the warranty? The warranty is limited to the consumer who originally purchases the product.
What is covered? This limited warranty covers all imperfections in workmanship and material.
What is not covered? This limited warranty does not cover damage resulting from accident, misuse or abuse, lack of proper maintenance, affixing of any attachments not provided with
the products, or loss of parts. IN NO EVENT SHALL Mr. Heater TECHNICAL PRODUCTS BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES NOR FOR ANY DAMAGES RESULTING FROM MISUSE OR MODIFICATION OF THIS PRODUCT.

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

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

The company warrants this product to be free from imperfections in material or workmanship, under normal and proper use in accordance with instructions of The Company, for a period
of one year from the date of delivery to the buyer. The Company, at its option, will repair or replace products returned by the buyer to the factory, transportation prepaid within said one year period and found by the Company to have imperfections in material or workmanship.
If a part is damaged or missing, call our Technical Support Department at 800-251-0001.
Address any Warranty Claims to the Service Department, Mr. Heater Group, Inc., 4560 W. 160th St., Cleveland, Ohio 44135. Include your name, address and telephone number and include details concerning the claim. Also, supply us with the purchase date and the name and address of the dealer from whom you purchased our product.
The foregoing is the full extent of the responsibility of the Company. There are no other warranties, express or implied. Specifically there is no warranty of fitness for a particular purpose and there is no warranty of merchantability. In no event shall the Company be liable for delay caused by imperfections, for consequential damages, or for any charges of the expense of any nature incurred without its written consent. The cost of repair or replacement shall be the exclusive remedy for any breach of warranty. There is no warranty against infringement of the like and no implied warranty arising from course of dealing or usage of trade. This warranty will not apply to any product which has been repaired or altered outside of the factory in any respect which in our judgment affects its condition or operation.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This Warranty gives you specific legal rights, and you may have other rights which vary from state to state.

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