US Stove Company HeatFast HF15TT User manual

854017B-2406M
CYLINDER NOT INCLUDED
MODEL: HF15TT / HF30TT
®
GAS-FIRED
INFRA-RED TANK
TOP HEATER
United States Stove Company
227 Industrial Park Road, South Pittsburg, TN
PH: [phone]
www.usstove.com
• Do not store or use gasoline or other ammable vapors and liquids in 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 ame.
• Shut off gas to appliance.
Service must be performed by a qualied service agency.
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.
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.
This is an unvented gas-red portable heater. It uses air (oxygen) from the area in which it is used. Adequate
combustion and ventilation air must be provided.
CALIFORNIA PROPOSITION 65 WARNING:
This product can expose you to chemicals including carbon
monoxide, which is known to the State of California to cause
cancer, birth defects, and/or other reproducve harm. For
more informaon, go to www.P65warnings.ca.gov

-2-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
-3-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
The heater is designed and approved for us as, a construcon heater and in accordance with ANSI Z83.7-2017 CSA 2.14-201.
Check with your local re safety authority if you have any quesons about applicaons.
Other standards govern the use of fuel gases and heat-producing products and specic applicaons. Your local authority can
advise you about these standards.
GENERAL SAFETY INFORMATION
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:
THE STATE OF CALIFORNIA REQUIRES THE FOLLOWING 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).
THIS PRODUCT CONTAINS CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER AND BIRTH
DEFECTS OR OTHER REPRODUCTIVE HARM.
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.
WARNING:
NOT FOR HOME OR RECREATIONAL VEHICLE USE.
WARNING:
YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS, SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU
OPERATE THIS HEATER.

-2-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
-3-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
GENERAL SAFETY INFORMATION
PORTABLE HEATER FEATURES
USA 8-Hr Time weighted average (OSHA 29 CFR 1926.55 App
A)
CO 50 ppm
CO25000 pm
NO2
USA – Ceiling Limit (Short Term Exposure Limit = 15 minutes)
CO
CO2
NO25 ppm
Canada 8-hr me weighted average WorkSafe BC OHS
Guidelines Part 5.1 and Ontario Work¬places Reg 833
CO 50 ppm
CO25000 pm
NO23 ppm (Reg 833)
Canada STEL (15 minutes Reg 833/1 hour WSBC) WorkSafe
BC OHS Guidelines Part 5.1 and Ontario Workplaces Reg 833
CO 100 ppm
CO2
15,000 pm (WSCB)
30,000 ppm (Reg 833)
NO2
1.0 ppm (WorkSafeBC)
5.0 ppm (Reg 833)
Note: Installaon of this appliance at altudes above 2000
 (610 m) shall be in accordance with local codes, or in the
absence of local codes, the Naonal Fuel Gas Code, ANSI
Z223.1/NFPA 54, or Naonal Standard of Canada, Natural Gas
and Propane Installaon Code, CSA B149.1.
Regulator
Knob
Fuel
Connector
Nut
Mounting
Bolt Knob
Tank Collar
Bracket
Manifold
Tip Over
Switch
Assembly

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WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
-5-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
• Propane cylinders (tanks) are not included with these heaters.
• Remove the heater from the carton.
• Use only vapor withdrawal LP gas cylinders constructed for use with propane only (HD-5) and marked in accordance with the
specicaons for LP gas cylinders of the U.S. Department of Transportaon (DOT SPEC. 39).
• This heater must be used only with a vapor withdrawal LP gas bulk tank equipped with a standard POL valve – Do Not use
this heater on bulk tanks greater than 20 pounds LPG capacity (50 pounds water capacity).
DUAL BURNER MODEL
1. Use a phillips head screw-driver to remove the two screws located in the collar bracket. Set aside for later use.
2. Place the collar bracket onto the tank with the tank collar bracket over the tank collar. Mounng bolt knob should be
posioned to the outside of the tank collar. Firmly secure the collar bracket to the tank by hand-ghtening the mounng bolt
knob. Do not overghten.


-4-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
-5-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
3. Align the bolt holes in the tank collar bracket with the bolt holes located in the center plate of the manifold. Using the
previously removed screws, secure the center plate manifold to the collar bracket. NOTE: The heater MUST be facing away
from the tank once it has been aached to the collar bracket. Make sure that p switch bracket is between the tank collar
bracket and the manifold center plate.
4. Make sure heater regulator is in the “OFF” posion. Insert regulator’s connector into tank’s valve and turn le (counter clock-
wise) with hand as much as possible. Do not overghten.


-6-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
-7-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.

SINGLE BURNER MODEL
1. Be sure the heater is facing away from tank. Insert the regulator connector into the tank valve outlet ng and turn le
(counter clock-wise) unl fully ghtened. Do not overghten.
2. Loosen the wingnut located on the venturi tube. Place the heater support around venturi and rest the boom of the heater
support on the propane cylinder. Tighten the previously loosened wingnut to secure the heater support onto venturi tube.
3. Operate only on a stable, level surface.
4. Open propane tank valve slowly.
5. Check all ngs for leaks. Apply a 50/50 mixture of liquid soap and water to all joints. Bubbles forming indicate a leaking
connecon. Correct all leaks before proceeding.
WARNING: NEVER TOUCH HEATER WHILE IN OPERATION TO AVOID INJURY. MOVE HEATER BY GRASPING THE
PROPANE CYLINDER CAREFULLY.
6. The heater should be inspected before each use and at least annually by a qualied service person.
7. The hose assembly shall be visually inspected prior to use of heater. If it is evident there is excessive abrasion or wear, or
the hose is cut, it must be replaced prior to the heater being put into operaon. Replacement hose assembly shall be hose
assembly as listed in the parts list.
8. Minimum inlet gas pressure is 20 psi.
9. Maximum inlet gas pressure is 120 psi (equivalent to an ambient temperature of 75°F (24°C)).

-6-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
-7-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
ODOR FADE WARNING
WARNING
ASPHYXIATION HAZARD
• DO NOT USE THIS HEATER FOR HEATING HUMAN LIVING QUARTERS.
• DO NOT USE IN UNVENTILATED AREAS.
• THE FLOW OF COMBUSTION AND VENTILATION AIR MUST NOT BE OBSTRUCTED.
• PROPER VENTILATION AIR MUST BE PROVIDED TO SUPPORT THE COMBUSTION AIR REQUIREMENTS OF THE
HEATER BEING USED.
• REFER TO THE SPECIFICATION SECTION OF THE HEATER’S MANUAL, HEATER DATA PLATE, OR CONTACT THE
FACTORY TO DETERMINE COMBUSTION AIR VENTILATION REQUIREMENTS OF THE HEATER.
• LACK OF PROPER VENTILATION AIR WILL LEAD TO IMPROPER COMBUSTION.
• IMPROPER COMBUSTION CAN LEAD TO CARBON MONOXIDE POISONING LEADING TO SERIOUS INJURY OR
DEATH. 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 specically for detecon 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 oor. ANY GAS
ODOR IS YOUR SIGNAL TO GO INTO IMMEDIATE ACTION!
• Do not take any acon that could ignite the fuel gas. Do not operate any electrical switches. Do not pull any power supply or
extension cords. Do not light matches or any other source of ame. Do not use your telephone.
• Get everyone out of the building and away from the area immediately.
• 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 gas.
• Propane (LP) gas is heavier than air and may sele in low areas. 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 re department. Do not re-enter the building or area.
• Stay out of the building and away from the area unl declared safe by the reghters and your fuel gas supplier.
• FINALLY, let the fuel gas service person and the reghters 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.

• Some people cannot smell well. 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 sni pamphlet. 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 me can aect your sensivity to that
parcular odor. Odors present in animal connement 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 circumstances.
• If there is an underground leak, the movement of gas through the soil can lter the odorant.
• Propane (LP) gas odor may dier in intensity at dierent levels. Since Propane (LP) gas is heavier than air, there may be more
odor at lower levels.
IMPORTANT INFORMATION

-8-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
-9-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
IMPORTANT INFORMATION
• Always be sensive to the slightest gas odor. If you connue to detect any gas odor, no maer how small, treat it as a serious
leak. Immediately go into acon as discussed previously.

• Propane (LP) gas has a disncve odor. Learn to recognize these odors. (Reference Fuel Gas Odor and Odor Fading secons
to the le and 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 gas.
• If you have not been properly trained in repair and service of propane (LP) gas then do not aempt to light heater, perform
service or repairs, or make any adjustments to the heater on the propane (LP) gas fuel system.
• A periodic sni test around the heater or at the heater’s joints; i.e. hose, connecons, etc., is a good safety pracce under any
condions. If you smell even a small amount of gas, CONTACT YOUR FUEL GAS SUPPLIER IMMEDIATELY. DO NOT WAIT!
GENERAL INFORMATION
A. These units are high pressure propane appliances and are designed to be connected to a bulk propane tank.
B. These heaters are equipped with an automac Safety Shuto Valve. The gas ow will automacally stop if the heater fails to
operate for any reason.
C. Maximum safety and convenience have been built into the Hi-Med-Lo-O Control Valve/Regulator. The following table lists
the approximate BTU’s consumed and the operang hours you can reasonably expect from bulk propane cylinders.
D. These heaters are for temporary heang of buildings under construcon, alteraons, or repair.
Model HF15TT HF30TT
Valve Posion BTU Input Hours w/20lb. Tank BTU Input Hours w/ 20lb. Tank
Hi 15,000 28 30,000 14
Med 12,000 36 24,000 18
Lo 10,000 43 10,000 43
FOR SAFE OPERATION
A. READ INSTRUCTIONS CAREFULLY: Read and adhere to these instrucons. Do not allow anyone who has not read the
instrucons to assemble, light, adjust or operate the heater.
WARNING: KEEP THE HEATER OUT OF THE REACH OF CHILDREN
B. Use only in accordance with local codes or, in the absence of local codes, with the standard for the Storage and handling of
Liqueed Petroleum Gases ANSI/NFPA 58 and CSA B 149.1, Natural Gas and Propane Installaon Code.
C. PROPANE IS VERY FLAMMABLE: In the event of a leak, propane will accumulate and the possibility of a re is present.
Propane gas is scented and its strong odor is readily detectable. Never strike a match or bring any ame or create an electric
spark in an enclosure when you smell propane gas. Venlate the area thoroughly, move the heater outside, nd and correct
the source of the leak before aempng to light any appliance. If you are unsure of these instrucons evacuate immediately
and call for help.
D. GAS LEAKAGE: If the leak cannot be corrected do not tamper with the heater, follow the shut down instrucons and return
the heater to the dealer or address given on last page.
WARNING: DO NOT USE THIS HEATER ON BULK TANKS OF GREATER CAPACITYTHAN 20 POUNDS LPG (50 POUNDS
WATER CAPACITY).

-8-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
-9-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
E. LEAK DETECTION: Before each use of the heater check all ngs and connecons with a soap soluon to be sure there are
no leaks. NEVER USE ANY FLAME FOR LEAK TEST.
F. CONNECTING HEATER TO PROPANE CYLINDER: Always connect the heater to the bulk cylinder in the outdoors or in a
well venlated area. NEVER connect this heater to a cylinder near an open ame.
G. USE OF HEATER: Always operate the heater with the propane cylinder in an upright posion on a level noncombusble
surface. NEVER place the cylinder on its side when operang the heater.
H. ATTEND HEATER: Do not leave heater unaended while it is in operaon.
I. ALWAYS LIGHT HEATER WITH MATCH OR “SPARKLITE” IGNITER: NEVER aempt to light the heater with a spark lighter.
J. DO NOT TAMPER: Should the heater not perform properly, such as lile or no heat when operang in the “Hi” posion, or
for any other reason, DO NOT ATTEMPT TO REPAIR OR TAMPER with the heater. Any tampering could make the use of the
heater unsafe and dangerous. Return the heater to the dealer or the address given on last page for repair or replacement.
K. FOR STORAGE: The heater Hi-Med-Lo-O regulang valve should always be turned to “o” when the heater is not in use.
Allow at least 15 minutes for cooling before handling and storing. Detach propane cylinder from heater before storing. DO
NOT store propane cylinders indoors or near open ame or heat.
L. DO NOT TRANSPORT OR MOVE APPLIANCE WHILE IN OPERATION. FOLLOW SHUTDOWN AND STORAGE
INSTRUCTIONS TO TRANSPORT OR MOVE THIS APPLIANCE.
VENTILATION
A. WARNING: This heater is an unvented appliance and MUST be used ONLY in a well venlated area. NEVER aempt to
operate the heater inside any vehicle, camper or enclosure.
B. FOR NON-RESIDENTIAL INDOOR AND OUTDOOR USE. Any combuson process requires and consumes oxygen, and will
produce carbon monoxide. THIS HEATER MUST BE USED WITH ADEQUATE VENTILATION. Do not use inside a house,
camper, tent or any type of unvented or a ghtly enclosed area.
C. WARNING: Provide ample venlaon. This heater consumes air (oxygen). Do not use this heater in unvenlated structures to
avoid endangering your life. Provide addional venlaon for any addional fuel-burning appliances and addional occupants.
D. Flow of combuson and venlaon air must not be obstructed.
MINIMUM CLEARANCE FROM COMBUSTIBLE MATERIALS
A. When operang, the heater surfaces are extremely hot. Keep sleeping bags, clothing, and all combusble materials clear of
the heater by at least the distances shown.
BTU/HR. Rang Normal
Operang
Procedure
Clearances to Combusbles
Model Gas Propane
From C.L.
OF HTR. TO
FLOOR
FRONT SIDES REAR CEILING
HF15TT 15,000 Vercal 24” 30” 30” 30” 30”
HF30TT 30,000 Vercal 24” 30” 30” 30” 36”
B. WARNING: To avoid injury or property damage never allow clothing, tents or other combusble materials within 30” of the
face of the heater. This heater must be located at least 24” above the oor level when in use. Never operate the heater when
sleeping.
C. WARNING: Never direct the heat output of this heater toward any propane tank within 20 feet.
IMPORTANT INFORMATION

-10-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
-11-
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
OPERATION
LIGHTING INSTRUCTIONS
Before aempng to light the heater, check all ngs and connecons with a soap soluon. NEVER USE A MATCH TO CHECK
FOR LEAKS. Should a gas leak occur, do not aempt to repair or use heater. Return the heater to your dealer or the address given
on back page.
Fuel – This heater must be used only with a vapor withdrawal LP gas bulk cylinder. THE BULK TANK MUST BE EQUIPPED WITH
A STANDARD POL VALVE.
WARNING: USE HD.5 PROPANE GAS ONLY. DO NOT USE ANY OTHER TYPE FUEL. SEE YOUR PROPANE DEALER IF
YOU HAVE ANY QUESTIONS REGARDING FUEL.
1. Turn the heater’s “Hi-Med-Lo-O” regulator knob to “Hi” (counterclockwise). Stand to the side of the unit while lighng. Do
not stand or have any part of the body over or in front of the heater while lighng.
2. Place a lit match inside the hole located on the le-hand side of the rear reector.
3. Depress and hold the valve buon located on the safety shuto valve. Aer the heater is lit, connue to hold the valve buon
in for 30 seconds, then release the buon slowly. CAUTION: DO NOT PUSH IN VALVE BUTTON BEFORE INSERTING THE
LIT MATCH. NEVER STAND IN FRONT OF THE HEATER WHILE LIGHTING.
4. If burner does not light within 30 seconds, turn the heater’s regulator knob to “O” (clockwise) and allow at least ve minutes
for gas to dissipate before aempng to relight.
5. NOTE: Should the orice become clogged as indicated by low volume of gas when operang on “Hi” with a full cylinder, or
should the heater fail to operate properly for any reason, return the heater to the dealer or the address given in this manual
for repair or replacement. DO NOT ATTEMPT TO REPAIR OR TAMPER WITH HEATER.
6. Adjust heat output by turning knob to desired posion.
DO NOT USE THIS HEATER FOR COOKING.