United States Stove HEATFAST HF200C User manual

• 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.
854015B-2502M
MODEL: HF80C/HF200C
®
CONVECTION
CONSTRUCTION
HEATER
United States Stove Company
227 Industrial Park Road, South Pittsburg, TN
PH: [phone]
www.usstove.com

-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
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 SAFETYIS IMPORTANTTO YOU ANDTO OTHERS, SO PLEASE READ THESE INSTRUCTIONS BEFOREYOU 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.
RETAIN THIS MANUAL FOR FUTURE REFERENCE
MAX SUPPLY PRESSURE: HF80C HF200C
To Regulator MIN (MAX=Bole
Pressure) 5PSI (34.5 kPa) 15PSI (103 kPa)
Regulator Out 11” W.C. (2.74 kPa) 10PSI (68.9 kPa)
Ignion Piezo Piezo
Min Ambient Temp. 0° F (17.8) ° C 0° F (17.8) ° C
BTU Rang Low-High 30,000-80,000 BTU/HR (8.8-23.4 kW) 75,000-200,000 BTU/HR (22-58.6 kW)
Fuel Consumpon 1.4-3.7 LBS/HR (.74-1.8 kg/HR) 3.5-9.3 LBS/HR (1.44-4.32 kg/HR)
Hose Length 15’ (456 cm) 15’ (456 cm)
VENTILATION:
Minimum openings required 2² Opening near oor 2² Opening near oor
2² Opening near ceiling 2² Opening near ceiling
FEATURES and SPECIFICATIONS
OPERATING PRECAUTIONS
This is a propane, direct-red, convecon heater. It’s intended use is primarily temporary heang of buildings under construcon,
alteraon or repair. Propane is heavier than air. If propane leaks from a connecon or ng, it sinks to the oor, collecng there
with the surrounding air, forming a potenally explosive mixture. Obviously, propane leaks should be avoided, so set up the
propane supply with utmost care. Leak check new connecons or reconnecon with a soap and water soluon and follow all
connecon instrucons herein. Also, ask your propane dealer for advice on the propane applicaon and supply installaon and ask
him to check it if there are any quesons. This heater was designed and cered for use as a construcon heater in accordance
with ANSI Standard ANSI Z83.7-2017 CSA 2.14-2017. Check with your local re safety authority if you have any quesons about
your applicaons. Other standards govern the use of fuel gases and heat producing products in specic applicaons.
Your local authority can advise you about these. Direct-Fired means that all of the combuson products enter the heated space.
Even though this heater operates very close to 100 percent combuson eciency, it sll 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 venlaon could result in death. The symptoms of inadequate venlaon are:
• headache
• dizziness
• burning eyes and nose
• nausea
• dry mouth or sore throat
So, be sure to follow advice about venlaon in these operang instrucons. When the heater is to be operated in the presence
of other people the user is responsible for properly acquainng those present with the safety precauons and instrucons, and of
the hazards involved.
GENERAL INFORMATION
WARNING: FAILURE TO FOLLOW THESE VENTILATION REQUIREMENTS MAY RESULT IN SOOTING DAMAGE.

-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.
SAFETY PRECAUTIONS
1. Check the heater thoroughly for damage. DO NOT operate a damaged heater.
2. DO NOT modify the heater or operate a heater which has been modied from its original condion.
3. DO NOT light or operate heater unless the shells are fully extended and locked into posion.
4. Use only propane gas.
5. Use only VAPOR WITHDRAWAL propane supply. If there is any queson about vapor withdrawal, ask your propane dealer.
6. Mount the propane cylinders vercally (shuto valve up). Secure them from falling or being knocked over and protect them
from damage.
7. Locate propane containers at least (USA) 7 . (2.13m) from the heater and do not direct exhaust toward containers.
8. IMPORTANT Use only the hose and regulator assembly provided with the heater. Match the color stripe on the hang tag
aached to the hose assembly with the color on the label located near the propane inlet ng on the heater. 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.
9. For indoor use only. Area must be well venlated. (Also see “Operang Precauons”).
10. If at any me gas odor is detected, IMMEDIATELY DISCONTINUE operaon unl the source of gas has been located and
corrected.
11. Install the heater such that it is not directly exposed to water spray, rain and/or dripping water.
12. Maintain minimum clearance from normal combusble material (like paper).
13. Due to the high surface and exhaust temperatures, adults and children must observe clearances to avoid burns or clothing
ignion.
14. Operate only on a stable, level surface.
15. Do not use with duct work. Do not restrict inlet or exit.
16. Do not move, handle or service while hot or burning.
17. 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 B149.1, Natural Gas and Propane Installaon Code.
MINIMUM CLEARANCE
From normal combusble material
Clearance
From sides 4 
From top 6 
Locate 10' from canvas or plasc tarpaulins or similar
coverings and secure them to prevent apping or
movement due to wind acon.
GENERAL INFORMATION

-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.
GENERAL INFORMATION
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.
WARNING
AIR QUALITY HAZARD
• USE OF DIRECT-FIRED HEATERS IN THE CONSTRUCTION ENVIRONMENT CAN RESULT IN EXPOSURE TO LEVELS OF
CO, CO2, AND NO2 CONSIDERED TO BE HAZARDOUS TO HEALTH AND POTENTIALLY LIFE THREATENING.
• KNOW THE SIGNS OF CO AND CO2 POISONING
• HEADACHES, STINGING EYES
• DIZZINESS, DISORIENTATION
• DIFFICULTY BREATHING, FEELS OF BEING SUFFOCATED
• PROPER VENTILATION AIR EXCHANGE (OSHA 29 CFR 1926.57) TO SUPPORT COMBUSTION AND MAINTAIN
ACCEPTABLE AIR QUALITY SHALL BE PROVIDED IN ACCORDANCE WITH OSHA 29 CFR PART 1926.154, ANSI A10.10
SAFETY REQUIREMENTS FOR TEMPORARY AND PORTABLE SPACE HEATING DEVICES AND EQUIPMENT USED IN
THE CONSTRUCTION INDUSTRY OR THE NATURAL GAS AND PROPANE INSTALLATION CODES CSA B149.1
• PERIODICALLY MONITOR LEVELS OF CO, CO2 AND NO2 EXISTING ATTHE CONSTRUCTION SITE – ATTHE MINIMUM
AT THE START OF THE SHIFT AND AFTER 4 HOURS.
• PROVIDE VENTILATION AIR EXCHANGE, EITHER NATURAL OR MECHANICAL, AS REQUIRED TO MAINTAIN
ACCEPTABLE INDOOR AIR QUALITY

-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.
GENERAL INFORMATION
USA 8-Hr Time weighted average (OSHA
29 CFR 1926.55 App A)
Canada 8-hr me weighted average WorkSafe BC OHS Guidelines Part 5.1
and Ontario Workplaces Reg 833
CO 50 ppm 25 ppm
CO25000 ppm 5000 ppm
NO23 ppm (Reg 833)
USA – Ceiling Limit (Short Term
Exposure Limit = 15 minutes)
Canada STEL (15 minutes Reg 833/1 hour WSBC) WorkSafe BC OHS
Guidelines Part 5.1 and Ontario Workplaces Reg 833
CO 100 ppm
CO215000 ppm (WSBC) 30000 ppm (Reg 833)
NO25 ppm 1.0 ppm (WorkSafeBC) 5.0 ppm (Reg 833)
• Ensure that the ow of combuson and venlaon air exchange cannot become obstructed.
• As the building ‘ghtens up’ during the construcon phases venlaon may need to be increased.
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.
ODOR FADING ‑ NO ODOR DETECTED
• 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.

-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.
GENERAL INFORMATION
ASSEMBLY
• 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.
ATTENTION ‑ CRITICAL POINTS TO REMEMBER!
• Propane (LP) gas has a disncve odor. Learn to recognize these odors. (Reference Fuel Gas Odor and Odor Fading secons
above.
• Even If you are not properly 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!
CAUTION: NEVER IGNITE AND / OR RUN THIS HEATER UNLESS THE SHELLS ARE FULLY EXTENDED AND LOCKED
INTO POSITION.
STEP 1
Remove heater from packaging. To protect your hands, put on
gloves before liing the outer shell. Never grasp bare metal
without gloves.
STEP 2
Li outer shell straight up. Care must be taken to protect hands
during li.
STEP 3
Li outer shell unl all three clips engage slots located in the
lower shell. When this happens, the screw holes will line up.
Make sure the clip
goes into the slots
in the lower shell
(3 places).
STEP 4
Lock the clip into place with 3 screws as shown. The heater must
not be operated unless the outer shell is properly extended and
fully locked into place.
Lock the shells together
with the clips in place
and with a screw in
each clip (3 screws
total).

-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.
OPERATING INSTRUCTIONS
PREPARING FOR OPERATION
1. Extend the shell fully and lock into place as shown in the enclosed instrucons sheet before lighng or operang the heater.
2. Check the heater for possible shipping damage. If any is found, immediately nofy the factory.
3. Follow all of the safety and operang precauons.
4. Connect the POL ng of hose and regulator assembly to the propane cylinder by rotang the POL nut counterclockwise
into the propane cylinder’s valve outlet and securely ghten with a wrench.
5. Connect the hose to the heater.
6. Securely ghten all gas connecons.
7. Open the cylinder’s gas valve and check all gas connecons with a soap and water soluon. DO NOT USE A FLAME.
STARTING THE HF80C
1. WARNING: BEFORE LIGHTING PILOT, turn main burner valve (turn knob fully clockwise) to low/light posion.
2. Fully open the valve on the propane cylinder and wait 15 seconds before Step 3.
3. Push knob in and hold for 5 seconds, allowing gas to emit from burner orice.
4. Rotate the knob counterclockwise unl the piezo igniter clicks. Connue to rotate and acvate the igniter unl the burner
lights.
5. Once the burner lights hold the knob in, on the low posion for 30 seconds. Then release. The burner should stay lit. If it does
not repeat steps 4 & 5 unl the burner stays lit.
6. Turn main burner valve to regulate heat output.
STARTING THE HF200C
1. WARNING: BEFORE LIGHTING PILOT, turn main burner valve (turn knob fully clockwise) to low/light posion.
2. Fully open the valve on the propane cylinder and wait 15 seconds before Step 3.
3. Depress red buon on safety pilot valve (to the right of the variable valve knob) adming gas to the pilot. Then push and
release the ignion buon (red buon to the right of the variable valve knob) unl the pilot lights.
4. When the pilot lights, connue to hold the buon depressed for 30 seconds, then release to light main burner.
5. If pilot goes out, wait 5 minutes and repeat the lighng procedure.
6. Turn main burner valve to regulate heat output.
STOP (ALL UNITS)
1. Securely close valve on the propane cylinder.
2. Connue to operate heater unl all fuel in the hose has burned.
3. Turn main burner valve to lo/light posion.
RESTART AFTER SAFETY SHUTDOWN
1. Securely close valve at propane cylinder.
2. Wait 5 minutes.
3. Restart following “Start” procedure for your model.

-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.
MAINTENANCE & STORAGE
1. The heater should be inspected before each use, and at least annually by a qualied person.
2. Before each use, check the so “O” ring seat at the bullnose of the POL ng. If the “O” ring is cut, scued, or otherwise
damaged, replace it.
3. Turn o the gas at the LP-gas supply cylinder(s) when the heater is not in use.
4. When the heater is to be stored indoors, the connecon 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 Liqueed Petroleum Gases ANSI/NFPA 58 and CSA B149.1,Natural Gas and Propane
Installaon Code.
SERVICING
A hazardous condition may result if a heater is used that has been modied or is not functioning properly. When the
heater is working properly:
• The ame is contained within the heater.
• The ame is essenally yellow with some blue at the base of the fame adjacent to the burner.
• There is no strong disagreeable odor, eye burning or other physical discomfort.
• There is no smoke or soot internal or external to the heater.
• There are no unplanned or unexplained shut downs of the heater.
The parts lists and exploded view show the heater as it was constructed. Do not use a heater which is dierent from that shown. In
this regard, use only the hose, regulator and cylinder connecon ng (called a POL ng) supplied with the heater. IMPORTANT
Match the color stripe on the hang tag aached to the hose assembly with the color on the label located near the propane inlet
ng on the heater. Do not use alternates. For this heater, the regulator must be set as shown in “specicaons”. If there is any
uncertainty about the regulator seng, have it checked. 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 indicang date, place of purchase, the nature of the problem and proof of purchase. Out-of-warranty products will be
repaired with a charge for parts and labor.
SIZE AND CAPACITY OF PROPANE CYLINDERS REQUIRED
The following charts show the approximate size of the cylinder required for these heaters. To use the chart:
1. Select the lowest air temperature expected (at the boom of the chart).
2. Move straight up to me of operaon desired (le side of chart).
3. Read the cylinder size required.
All heaters should have: Full cylinders good air circulaon no frost on cylinders
4
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s
3
C
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2
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1
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s
30
20
10
0
60
(16)
40
(4.4)
20
(-6.7)
0
(-18)
-20
(-29)
MAXIMUM OPERATING TIME - HOURS @ 200,000 BTU/hr (58.6 kW)
AIR TEMPERATURE - °F
HF200C
40 Fuel Cylinder Capacity: 100#
Use liquid withdrawal
and vaporizer
1
0
0
#
(
2
5
g
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.
)
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2
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(
5
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4
0
#
(
1
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.
)
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e
Burn Rate = 80,000 BTU/hr
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0 60 40 20 0 -20
MAXIMUM OPERATING TIME - HOURS
AIR TEMPERATURE - °F
HF80C

-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.
HF80C PARTS LIST
Key Part # Description Qty
1 893993 Combustion Chamber Assembly 1
2 81378 Burner Orice Assembly 1
3 893994 Burner Cone Assembly 1
4 893998 Combustion Chamber Ring 1
5 893991 Control Knob 1
6 81380 Valve and Gas Assembly 1
7 81376 Hose & Regulator Assembly 10' 1
1
2
3
4
5
7
6
IN ORDER TO MAINTAIN WARRANTY, COMPONENTS MUST BE REPLACED USING ORIGINAL MANUFACTURERS PARTS
PURCHASED THROUGH YOUR DEALER OR DIRECTLY FROM THE APPLIANCE MANUFACTURER. USE OF THIRD PARTY
COMPONENTS WILL VOID THE WARRANTY.