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 ELECTRIC SHOCK.
GENERAL HAZARD WARNING:
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, LABEL, ETC. CONTACT THE MANUFACTURER.
WARNING
CARDBOARD, A SAFE DISTANCE AWAY FROM THE HEATER AS RECOMMENDED BY
THESE INSTRUCTIONS. NEVER USE THE HEATER IN SPACES WHICH DO OR MAY
CONTAIN VOLATILE OR AIRBORNE COMBUSTIBLES, OR PRODUCTS SUCH AS GASOLINE,
SOLVENTS, PAINT THINNERS, DUST PARTICLES OR UNKNOWN CHEMICALS.
in enclosed spaces such as a tent, a camper, any vehicle or recreational vehicle (RV), enclosed
shelter, or any other enclosed areas.
DANGER
DANGER
NOT FOR HOME OR RECREATIONAL VEHICLE USE.
Carbon Monoxide Hazard This heater produces carbon monoxide, which has no
odor. Burning the heater in an enclosed space can kill you. Never use the heater
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.
Not for use in residential living areas or in non-adequately ventilated enclosed
spaces. Never bring or store a propane cylinder indoors.
.....11
WARNING
Failure to comply with the precautions and instructions provided with this heater can result in
death, serious bodily injury, property loss or damage from the hazards of fire, explosions, burns,
asphyxiation or carbon monoxide poisoning. Only persons who can read and understand these
instructions should use or service this heater.
VENTILATION on Page 8.
WARNING
Wash hands after handling.
This heater is designed and approved for use as a construction heater in accordance with Standard
ANSI Z83.7-2011/CSA 2.14-2011. CHECK WITH YOUR LOCAL FIRE SAFETY AUTHORITY IF YOU
HAVE ANY QUESTIONS ABOUT APPLICATIONS. Other standards govern the use of fuel gasses
and heating products for specic uses. Your local authority can advise you about these.
DO NOT OPERATE THIS HEATER UNTIL YOU HAVE READ AND THOROUGHLY
UNDERSTAND THESE SAFETY AND OPERATING INSTRUCTIONS.
This is an unvented portable heater. It uses air (oxygen) from the area in which
it is used. Adequate combustion and ventilation air must be provided. Refer to
CALIFORNIA RESIDENTS: This product contains chemicals, including lead,
known to the State of California to cause birth defects or other reproductive harm.
The products described in this manual are
propane direct-red, forced air heaters. Propane
forced air heaters are primarily intended for
use for temporary heating of buildings under
construction, alteration or repair. Direct-red
means that all of the combustion products of the
heater enter the heated space. This appliance
is rated at 98% combustion efciency, but does
produce small amounts of carbon monoxide.
CARBON MONOXIDE POISONING
MAY LEAD TO DEATH!
Carbon monoxide is toxic. Humans can tolerate
only small amounts of carbon monoxide and so
precautions should be taken to provide proper
ventilation. Failure to provide proper ventilation
in accordance with the instructions in this manual
can result in death.
People with breathing problems should consult a
physician before using this heater.
Early signs of carbon monoxide poisoning
resemble the u. Symptoms of improper
ventilation / carbon monoxide poisoning are:
Headache • Dizziness • Nausea
Sore Throat
If you experience any of these symptoms:
GET FRESH AIR AT ONCE! Have your heater
serviced and check for proper ventilation. Some
people are more affected by carbon monoxide
than others. These include: pregnant women,
those with heart or lung problems, anemia or those
under the influence of alcohol or at high altitudes.
FOR OUTDOOR USE. INDOOR USE
PERMITTED ONLY FOR: The temporary
heating of adequately ventilated buildings or
structures under construction, alteration or
repair! Provide at least a three square foot
(2,800 sq cm) opening of outside air for
every 100,000 Btu / Hr heater rating. Refer to
“Ventilation” on page 8 for further instructions.
• Burning of Nose and Eyes
• Dry Mouth
PROPANE IS AN
EXPLOSIVE GAS.
WHAT TO DO IF THE SMELL OF GAS IS PRESENT:
–DO NOT attempt to light the heater.
–Extinguish any open ame.
–Shut off gas to heater.
–If odor continues, contact your local gas
supplier or re department.
–DO NOT touch or use any electric switch or
any electric device that can cause a spark.
–Immediately call your gas supplier from a
neighbors phone. Follow the gas suppliers
instructions.
–If you can not reach your gas supplier, call
the re department.
–Service must be done by a qualied
service agency.
RISK OF BURNS, FIRE AND
EXPLOSION!
NEVER store or use gasoline or other ammable
vapors and liquids in the vicinity of this heater.
NEVER store
connected to this heater in the vicinity of this heater.
NEVER
NEVER
ventilation air. (The front and rear of heater).
NEVER use duct work in front or rear of heater.
NEVER modify this heater or operate a heater that
has been modified.
NEVER service, move or handle heater while still
hot or operating
KEEP CHILDREN, ANIMALS, CLOTHING AND
COMBUSTIBLES AWAY FROM HEATER.
Keep all combustible materials away from this heater.
Instructions: This appliance
is equipped with a three-prong (grounding)
plug for your protection against shock
hazard and should be plugged directly into a
properly grounded three-prong receptacle.
ALWAYS use the electrical power (voltage and
frequency) specified on the model plate of the heater.
ALWAYS use only 14 AWG or better extension cord.
ALWAYS unplug the heater when not in use.
ALWAYS install the heater so that it is not directly
exposed to water spray, rain, dripping water, or wind.
For use with propane (LP)
gas only.
–Use heater in accordance with all local codes.
In the absence of local codes, refer to The
National Fuel Code, ANSI Z223.1.
–This heater is shipped from the factory
for use with propane (LP) gas only. Do not
convert to any other gas. Installation must
conform to local codes, or in their absence,
with the standard for the Storage and
WARNING
The hose assembly shall be
pro tected from traffic, building
material and contact with hot surfaces both
during use and while in storage.
Handling of Liquefied Petroleum Gases ANSI/
NFPA 58 and the Natural Gas and Propane
Installation Code CSA B149.1.
–Gas supply connections should be checked
by using a 50/50 soap and water solution.
Never use a ame to check for gas leaks.
–Locate LP cylinder at least 6 feet (10 ft. in
Canada) from the heater, and do not direct
heater discharge towards the LP cylinder
unless it is at least 20 feet from the heater.
–Use only the regulator and hose assembly
provided with this heater. Inspect the
regulator/hose assembly prior to each use of
the heater. If there is excessive abrasion or
wear, or if the hose is cut, replace it with the
proper assembly shown in the parts list, prior
to using the heater.
Minimum and Maximum Supply Pressure
MH-375T-GFA-A
Min.23 PSI
Max.Bottle Pressure
WARNING
RISK OF FIRE! DO NOT POSITION HEATER IN A DOWNWARD ANGLE.
ALWAYS LOCATE HEATER ON A STABLE AND LEVEL SURFACE!
Figure 1
1. Remove all packing items applied to heater for
shipment. Keep plastic cover caps attached to
inlet connector and hose / regulator assembly
for storage.
The amount of Propane (LP) used with this
heater varies. Both factors are
Propane (LP)
This heater is not supplied with a propane cylinder.
Use only an approved propane cylinder.
LP Characteristics
–Flammable, explosive under pressure, heavier
than air and pools in low areas.
–In its natural state, propane has no odor, but
for your safety an odor that smells like rotten
cabbage has been added.
–Contact of propane (LP) gas with the skin can
cause freeze burns.
–Heater is manufactured for use with propane
gas only. DO NOT attempt to convert to any
other gas. Such modications are dangerous
and will void the warranty.
–When heater is not in use, LP Cylinder must be
turned OFF.
–Be sure that the LP Cylinder is located on a
level and stable surface.
–The amount of gas in the cylinder of LP.
–The temperature of the LP tank and its
surroundings.
Average Temp
(ºF)
40º3
32º
20º
10º
0º
-10º
-20º
The table above shows the minimum number of 100 lb. LP
cylinders required in cold weather. Your local LP dealer will
help you select the proper LP supply system.
MH-375T-GFA-A
100 lb. Cylinder
Use Larger Tank
Propane is safe to use when
properly handled. Careless
handling of the LP cylinder could result in a
fire and or an explosion.
–DO NOT use this heater in a basement or
below ground level. Propane is heavier than
air and will always seek the lowest level. If you
suspect a leak, shut off the valve at the LP
Cylinder immediately.
The Propane (LP) cylinder must also be
equipped with the following
–Always keep LP cylinder fastened and upright.
–Avoid tipping the LP cylinder on its side when
connected to a regulator, since this may
cause damage to diaphragm in the regulator.
–Handle valves with care.
–Never connect an unregulated LP cylinder to
a construction heater.
–DO NOT subject LP cylinder to excessive heat.
–A collar to protect the gas valve.
–A shut-off valve terminating a LP cylinder valve
outlet as specied in the American National
Standard for Compressed Gas Cylinder Valve
Outlets and Inlets Connections.
–A safety relief valve having direct
–Tightly close the gas shutoff valve on the LP
cylinder after each use.
–All ttings must be protected when
disconnected from the LP cylinder.
–Never store an LP cylinder inside a building or
in the vicinity of an gas burning appliances.
communications with the vapor space of the LP
cylinder.
–The heater must operate on vapor withdrawal
CAUTION
garage or any other enclosed area.
The disconnected tank must
never be stored in a building,
performed by personnel who have been
thoroughly trained in accepted LP gas
industry procedures. Failure to follow these
instructions may result in explosion, fire,
severe personal injury or death.
ALL NEW LP CYLINDERS MUST BE PURGED
BEFORE THE FIRST FILLING.
–Turn heater gas valve knob and LP cylinder
valve to OFF position.
–LP cylinder valve equipped with old style
tting has LEFT HANDED THREADS. Turn
tting CLOCKWISE to loosen. Protect this
tting when disconnected from LP cylinder.
–Have your LP cylinder lled by your local
propane gas supplier.
–Some LP cylinders have a bleed-OFF valve.
This valve should be inspected for leaks after
each lling of the LP cylinder. Turn the valve
clockwise to close.
Purging and filling of the
LP cylinders must be
–With heater gas valve knob still in OFF
position turn ON the LP cylinder valve and
check for leaks with soap solution.
Checking For Leaks
–To check for leaks, make up a 50/50 solution
of dish soap and water. Apply this solution
to all gas connections. If bubbles appear,
there is a leak. If a leak is found, turn off
the gas supply, and re-connect the leaking
connection. If the leak persists after several
tries, contact Pinnacle Customer Service at
(800)-641-6996.
–The installation of this heater must meet all
local codes and/or gas utility requirements. In
the absence of local codes, the National Fuel
Code ANSI Z223.1 should be followed.
–The minimum clearances to any combustible
construction materials must be maintained at
all times (See Page 2).
1. Connect the heater to a three prong (grounded)
power source. You must use a three prong
(grounded) extension cord that is at least 6 feet
long is a minimum of 14 AWG rating.
2. Connect heater to a proper LP cylinder.
3. Turn gas valve CLOCKWISE to on position.
4. Wait ve (5) minutes for any glass to clear.
Smell for gas, if you do not smell gas, go to
step 5.
5. Adjust the regulator setting to between
7 PSIG and 10 PSIG.
NOTE: If the heater still does not start, turn
power switch to OFF position and wait 10
seconds for safety control to reset. Then
follow all starting procedures to light heater.
Shutdown Instructions
To Shut Off the Heater:
1. Turn gas valve knob CLOCKWISE to
“O” (OFF) position. (See Figure 5)
2. Turn gas supply OFF by turning the LP
cylinder valve CLOCKWISE to close.
3. Disconnect the power cord.
CAUTION
PSIG or the heater may not operate properly.
6. Select desired heat setting with thermostat
knob. (Figure 5)
7. Trun power switch to the ON position. Heater
will start within 20 seconds. (Figure 5)
8. If the heater does not start, the thermostat
setting may be too low. Turn thermostat to
higher setting to start heater.
Do not adjust the regulator
above 10 PSIG or below 7
ON
Test Firing the Heater
Test fire your construction heater following the
lighting instructions applicable to the gas control
system employed.
Leak test all gas connections with 50/50 soap
and water solution prior to start-up. Soap bubbles
indicate a gas leak. DO NOT use a match or
flame to test for gas leaks.
NOTE: Heater surface temperature must be
cold before initiating service, cleaning or
storage.
Monoxide Poisoning. Use heater only in
well ventilated areas.
–Refer to Safety Information on pages 1-2
for information about Carbon Monoxide
Poisoning.
Minimum Ventilation Opening Needed
375T-GFA-A
2
2
DANGER
11.25 ft.
342.9 cm
Not for use in residential
living areas or in
non-adequately ventilated enclosed spaces.
Storage / Maintenance
Always disconnect the heater from the LP
cylinder before putting the heater into storage. If
for any reason the heater is to be stored indoors,
the tank MUST be disconnected from the LP
cylinder, and the cylinder stored outdoors in a
well-ventilated area, out of the reach of children,
and in accordance with the Standard for Storage
and Handling of Petroleum Gases, ANSI/NFPA
58 - latest edition and Natural Gas and Propane
Installation Code, CSA B149.1. The plastic valve
plug or valve cover supplied with the cylinder
must be re-installed on the valve to protect the
fitting from damage.
DANGER
Never store an LP cylinder
inside of a building or near
any other gas or oil burning appliances.
NOTE: Installation and repair of this heater
should be done by a qualified service person.
ALWAYS be sure to follow proper maintenance
procedures. This should include cleaning the
inside of the heater once a month and checking
the spark gap at least once a heating season.
Re-gap the terminals to 0.160” (4mm)
Your serial number can be found on a white label on the right side cover of your heater. It will begin
with the letters “HGF” followed by 8 digits. For Example: HGF12345678. Have your Serial Number
ready before calling customer service at 800-641-6996.
ProblemPossible Cause(s)Solution
Fan does not turn when
electricity is connected.
Heater will not re (ignite).
Heater stops running
by itself.
1. No electric power to heater.
2. Blades of fan in contact with
heater housing.
3. Fan blades bent.
4. Fan motor defective.
1. No spark at module.
2. Incorrect spark gap.
3. Corroded electrode.
1. Temperature inside heater
is too high, causing thermal
switch to shut down operation.
1. Check current at outlet. If
voltage is correct, inspect
extension and power cords for
cuts, frays or breaks
2. Check housing for damage. Be
sure there are no dents in the
housing obstructing the fan.
3. Straighten all fan blades.
4. Replace motor assembly.
1. Inspect module wire. Re-attach
or tighten if loose. Inspect
spark module and replace if
necessary. Inspect all other
electrical components.
2. Set plug gap to 0.16” (4 mm).
3. Replace spark plug
(multi-bracket assembly).
1. If the heater input or output
is restricted, the inside
temperature can become too
hot. Keep the areas in front
and behind heater clear of
obstructions.
Pinnacle Products International, Inc. warrants this heater
to the original retail purchaser only, to be free from defects
in material and workmanship for a period of one (1) year
from the date of initial purchase. This product must be
properly installed, maintained and operated in accordance
with the instructions provided.
Pinnacle Products International, Inc. requires reasonable
proof of your date of purchase from an authorized retailer
or distributor. Therefore, you should keep your sales slip,
invoice or cancelled check from the original purchase.
This Limited Warranty shall be limited to the repair or
replacement of parts, which prove defective under normal
use and service within the warranty period, and which
Pinnacle Products International , Inc. shall determine at
its reasonable discretion.
This warranty does not apply to products purchased for
rental use.
This Limited Warranty does not cover any failures or
operating difculties due to normal wear and tear, accident,
abuse, misuse, alteration, misapplication, improper
installation or improper maintenance and service by you
or any third part. Failure to perform normal and routine
maintenance on the heater, shipping damage, damage
related to insects, birds or animals of any kind, and damage
due to weather conditions are also not covered.
In addition, the Limited Warranty does not cover damage
to the nish, such as scratches, dents, discoloration, rust or
other weather damage, after purchase.
All transportation costs for the return of damaged product
or parts will be the responsibility of the purchaser.
Upon receipt of damaged item, Pinnacle Products International, Inc. will examine the item and determine if
defective. Pinnacle Products International, Inc. will repair
or replace and return the item, freight pre-paid.
If Pinnacle Products International, Inc. nds the item to
be in normal operating condition, or not defective the item
will be returned freight collect. This Limited Warranty is in
lieu of all other express warranties. Pinnacle Products International, Inc. disclaims al warranties for products that
are purchased from sellers other than authorized dealers or
distributors.
AFTER THE PERIOD OF THE ONE (1) YEAR EXPRESS
WARRANTY EXPIRES, Pinnacle Products International,
Inc. DISCLAIMS ANY AND ALL IMPLIED WARRANTIES,
INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
APPLICATION. FURTHER, Pinnacle Products International, Inc. SHALL HAVE NO LIABILITY WHATSOEVER TO PURCHASER
OR ANY THIRD PARTY FRO ANY SPECIAL, INDIRECT, PUNITIVE
INCIDENTAL, OR CONSEQUENTIAL DAMAGES. Pinnacle
Products International, Inc. assumes no responsibility for
any defects caused by third parties. This Limited Warranty
gives the purchaser specic legal rights; a purchaser may
have other rights depending upon where he or she lives.
Some states do not allow the exclusion or limitation of
special, incidental or consequential damages, or limitations
on how long a warranty lasts, so the above exclusion and
limitations may not apply to you.
Pinnacle Products International, Inc. does not authorize
any person or company to assume for it any other
obligation or liability in connection with the sale, installation,
use, removal, return or replacement of its equipment, and
no such representations are binding on Pinnacle Products
International, Inc.
Always be sure to specify the model number and serial
number when making any claim with Pinnacle Products International, Inc. For your convenience, use the space
provided below to list this information.
Register Your Product Online at: http://www.masterindustrialproducts.com/Product_Registration.php
Locating Your Serial Number:
Your serial number can be found on a white label on the right side cover of your heater. It will begin with the
letters “HGF” followed by 8 digits. For Example: HGF12345678. Have your Serial Number ready before calling
customer service at 800-641-6996.