IMPORTANT: Read and understand this manual before assembling, starting, or servicing
heater. Improper use of heater can cause serious injury. Keep this manual for future reference.
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.
TABLE OF CONTENTS
SAFETY INFORMATION ............................................................ 2
WARRANTY INFORMATION...................................... Back Cover
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Save this manual for future reference.
SAFETY INFORMATION
2
SAFETY INFORMATION
WARNINGS
WARNING: This product contains and/or generates
chemicals known to the State of California to cause
cancer or 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.
The heater is designed for use as a construction heater in accordance
with ANSI Z83.7/CGA 2.14. Other standards govern the use of fuel
gases and heating products for specific uses. Your local authority
can advise you about these. The primary purpose of construction
heaters is to provide temporary heating of buildings under construction, alteration or repair. Properly used, the heater provides safe
economical heating. Products of combustion are vented into the area
being heated.
We cannot foresee every use which may be made of our heaters.
Check with your local fire safety authority if you have questions
about heater use.
Other standards govern the use of fuel gases and heat producing
products for specific uses. Your local authorities can advise you
about these.
Carbon Monoxide Poisoning: Some people are more affected by
carbon monoxide than others. Early signs of carbon monoxide
poisoning resemble the flu, with headaches, dizziness, and/or nausea. If you have these signs, the heater may not be working properly.
Get fresh air at once! Check for proper ventilation and have heater
serviced.
Propane Gas: Propane gas is odorless. An odor-making agent is
added to propane gas. The odor helps you detect a propane gas leak.
However, the odor added to propane gas can fade. Propane gas may
be present even though no odor exists.
Make certain you read and understand all warnings. Keep this
manual for reference. It is your guide to safe and proper operation
of this heater.
• Install and use heater with care. Follow all local ordinances and
codes. In the absence of local ordinances and codes, refer to the
Standard for Storage and Handling of Liquefied Petr oleum Gas,
ANSI/NFPA 58 and the Propane Installation Code, CAN/CGA
B149.2. This instructs on the safe storage and handling of pro-
pane gases.
• Use only the electrical voltage and frequency specified on model
plate. The electrical connections and grounding of the heater
shall follow the National Electric Code, ANSI/NFPA 70 or the
Canadian Electrical Code, Part 1.
• Electrical grounding 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 or extension cord.
• This product has been approved for use in the Commonwealth
of Massachusetts.
• Use only the hose and factory preset regulator provided with the heater.
• Use only propane gas set up for vapor withdrawal.
• Provide adequate ventilation. Before using heater, provide at least
a three-square-foot opening of fresh, outside air for each 100,000
Btu/Hr of rating.
• For indoor use only. Do not use heater outdoors.
• Do not use heater in occupied dwellings or in living or sleeping
quarters.
• Do not use heater in basement or below ground level. Propane
gas is heavier than air. If a leak occurs, propane gas will sink to
the lowest possible level.
• Keep appliance area clear and free from combustible materials,
gasoline, paint thinner, and other flammable vapors and liquids.
• Do not use heater in areas with high dust content. Dust is
combustible.
• Minimum heater clearances from combustible materials:
Outlet: 8 Ft. Sides: 2 Ft. Top: 6 Ft. Rear: 2 Ft.
• Keep heater at least six feet from propane tank(s). Do not point
heater at propane tank(s) within 20 feet.
• Keep propane tank(s) below 100° F.
• Check heater for damage before each use. Do not use a damaged heater.
• Check hose before each use of heater. If highly worn or cut,
replace with hose specified by manufacturer before using heater.
• Locate heater on stable and level surface if heater is hot or operating.
• Never block air inlet (rear) or air outlet (front) of heater.
• Keep heater away from strong drafts, wind, water spray , rain, or
dripping water.
• Do not leave heater unattended.
• Keep children and animals away from heater.
• Never move, handle, or service a hot or operating heater. Severe
burns may result. Y ou must wait 15 minutes after turning heater of f.
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102370-01K
SAFETY INFORMATION
PRODUCT IDENTIFICATION
UNPACKING
THEORY OF OPERATION
3
3
SAFETY INFORMATION
Continued
• To prevent injury, wear gloves when handling heater.
• Never attach duct work to heater.
• Do not alter heater. Keep heater in its original state.
• Do not use heater if altered.
• Turn off propane supply to heater when not in use.
• Use only original replacement parts. This heater must use design-specific parts. Do not substitute or use generic parts. Improper replacement parts could cause serious or fatal injuries.
PRODUCT IDENTIFICATION
Hot Air Outlet
(Front)
Handle
Fan Guard
Motor
Mount
Control
Knob
Inlet
Connector
Power Cord
UNPACKING
1.Remove all packing items applied to heater for shipment. Keep
plastic cover caps (attached to inlet connector and hose/regulator assembly) for storage.
2.Remove all items from carton.
3.Check all items for shipping damage. If heater is damaged,
promptly inform dealer where you bought heater.
THEORY OF OPERATION
The Fuel System: The hose/regulator assembly attaches to the
propane gas supply. The propane gas moves through the automatic
control valve and out the nozzle.
The Air System: The motor turns the fan. The fan pushes air into
and around the combustion chamber. This air is heated and provides
a stream of clean, hot air.
The Ignition System: The spark transformer and ignitor lights the
main burner.
The Safety Control System: This system causes the heater to shut
down if the flame goes out.
Note:
Some parts are located differently on some models.
Combustion
Chamber
Clean
Heated
Air Out
(Front)
Nozzle
Fan
Cool
Air In
(Back)
Power
Cord
Hose /Regulator
Assembly
Figure 1 - 100,000 Btu/Hr Model
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102370-01K
Air For Combustion
And Heating
Figure 2 - Cross Section Operational View
Fuel
Hose/
Regulator
Assembly
PROPANE SUPPLY
INSTALLATION
4
VENTILATION
PROPANE SUPPLY
Propane gas and propane tank(s) are to be furnished by the user.
Use this heater only with a propane vapor withdrawal supply
system. See Chapter 5 of the Standard for Storage and Handling of
Liquefied Petroleum Gas, ANSI/NFPA 58 and the Propane Installation Code CAN/CGA B149.2. Your local library or fire depart-
ment will have this booklet.
The amount of propane gas ready for use from propane tanks varies.
Two factors decide this amount:
1.The amount of propane gas in tank(s)
2.The temperature of tank(s)
The chart below shows the number of 100 pound tanks needed to run
this heater.
Temperature(°F)Number of tanks,
at Tank100,000 Btu/Hr
32°2
20°2
10°3
0°3
-10°(Use larger tank)
-20°(Use larger tank)
Less gas is vaporized at lower temperatures. You may need two or
more 100 pound tanks or one larger tank in colder weather. Your
local propane gas dealer will help you select the proper supply
system. The minimum surrounding air temperature rating for each
heater is -20°F (-29°C).
3.Connect hose to inlet connector. T ighten firmly using a wrench.
IMPORTANT:
Extra hose or piping may be used if needed. Install extra hose or piping between hose/regulator assembly and
propane tank. You must use the regulator supplied with heater.
4.Open propane supply valve on propane tank(s) 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 slowly.
5.Check all connections for leaks.
6.Close propane supply valve.
Supply
Valve
Propane
Tank
Figure 3 - Regulator With Vent Pointing Down
100,000 Btu/Hr
Model Shown
Fuel Gas
Connector
Vent
(pointing
down)
Hose
Regulator
INSTALLATION
WARNING: Review and understand the warnings
in the
needed to safely operate this heater. Follow all local
codes when using this heater.
for leaks after installing or servicing. Never use an
open flame to check for a leak. Apply a mixture of
liquid soap and water to all joints. Bubbles forming
show a leak. Correct all leaks at once.
1.Provide propane supply system (see Propane Supply above).
2.Connect fuel gas connector fitting on hose/regulator assembly
Safety Information
section, page 2. They are
WARNING: Test all gas piping and connections
to propane tank(s). Turn counterclockwise into threads on tank
valve. Tighten firmly using wrench.
IMPORTANT:
Tighten
regulator with vent pointing down. Pointing vent down protects regulator from weather damage.
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Inlet
Connector
Figure 4 - Hose and Inlet Connector
Hose
VENTILATION
WARNING: Follow the minimum fresh, outside air
ventilation requirements. If proper fresh, outside air
ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air
ventilation before running heater.
Provide a fresh air opening of at least three square feet for each
100,000 Btu/Hr rating. Provide extra fresh air if more heaters are
being used.
102370-01K
OPERATION
STORAGE
MAINTENANCE
5
5
OPERATION
WARNING: Follow the minimum fresh, outside air
ventilation requirements. If proper fresh, outside air
ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater.
WARNING: Review and understand the warnings
in the
needed to safely operate this heater. Follow all local
codes when using this heater.
TO START HEATER
1.Follow all installation, ventilation and safety information.
2.Locate heater on stable and level surface. Make sure strong
3.Make sure the control knob is in the OFF position.
4.Plug power cord of heater into a three-prong, grounded extension
5.Plug extension cord into a 120 volt/60 hertz, 3-hole, grounded
6.Open propane supply valve on propane tank(s) slowly.
7.Press and hold in control knob. Turn counterclockwise to the
8.After heater ignites, wait 30 seconds. This activates the auto-
9.When burner remains lit, set heater at the desired heat level by
Safety Information
drafts do not blow into front or rear of heater.
cord. Extension cord must be at least six feet long, UL/CSA listed,
and of a proper size.
Extension Cord Size Requirement
Up to 100 feet long, use 16 AWG rated cord.
101 to 200 feet long, use 14 AWG rated cord.
outlet. Motor will start. Fan will turn, forcing air out front of heater.
not opened slowly, excess-flow check valve on propane tank
will stop gas flow. You may hear a click from the excess-flow
check valve closing. If this happens, reset the excess-flow check
valve by closing propane supply valve and open again slowly .
LOW position. Heater should ignite within a few seconds.
Note:
If heater fails to ignite, hose may have air in it. If so,
keep control knob pressed and wait 20 seconds. Release automatic control valve button and wait 20 seconds for unburned
fuel to exit heater. Repeat step 7.
matic control system. Release the control knob.
turning the control valve counterclockwise. If burner goes out,
turn off gas. Turn control knob fully clockwise to the lowest
position. Check fuel supply. If adequate fuel is available, restart heater beginning at step 1.
section, page 2. They are
Note:
If
STORAGE
CAUTION: Disconnect heater from propane sup-
ply tank(s).
1.Store propane tank(s) in safe manner. See Chapter 5 of Standard for Storage and Handling of Liquefied Petr oleum Gases,
ANSI/NFPA 58 and the Propane Installation Code CAN/CGA
B149.2. Follow all local codes. Always store propane tanks
outdoors.
2.Place plastic cover caps over brass fittings on inlet connector
and hose/regulator assembly.
3.Store in dry , clean, and safe place. Do not store hose/regulator
assembly inside heater combustion chamber.
4.When taking heater out of storage, always check inside of
heater. Insects and small animals may place foreign objects in
heater. Keep inside of heater free from combustible and foreign objects.
MAINTENANCE
WARNINGS
• Never service heater while it is plugged in, connected to propane supply, operating, or hot. Severe burns and electrical shock can occur.
• Keep heater clear and free from combustible materials, gasoline, and other flammable vapors and
liquids.
• Do not block the flow of combustion or ventilation air.
1.Keep heater clean. Clean heater annually or as needed to remove dust and debris. If heater is dirty or dusty, clean heater
with a damp cloth. Use household cleaners on difficult spots.
2.Inspect heater before each use. Check connections for leaks.
Apply mixture of liquid soap and water to connections. Bubbles
forming show a leak. Correct all leaks at once.
3.Inspect hose/regulator assembly before each use. If hose is highly
worn or cut, replace with hose specified by manufacturer.
4.Have heater inspected yearly by a qualified service agency.
5.Keep inside of heater free from combustible and foreign objects. Remove motor and other internal parts if needed to clean
inside of heater (see Service Procedures, page 7).
6.Clean fan blades each season or as needed (see Fan, page 8).
TO STOP HEATER
1.Tightly close propane supply valve on propane tank(s).
2.Wait a few seconds. Heater will burn gas left in supply hoses.
3.Turn control knob to the OFF position.
4.Unplug heater.
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For more information, visit www.desatech.com
102370-01K
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