PROPANE CONSTRUCTION
TM CONVECTION HEATER
OWNER’S MANUAL
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Variable 40,000, 60,000 and
80,000 Btu/Hr Models
OFF
LO
MED
HI
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 |
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SAFETY INFORMATION ............................................................ |
2 |
PRODUCT IDENTIFICATION ..................................................... |
3 |
UNPACKING ............................................................................... |
3 |
THEORY OF OPERATION ......................................................... |
3 |
PROPANE SUPPLY .................................................................... |
3 |
VENTILATION ............................................................................. |
3 |
INSTALLATION ........................................................................... |
4 |
OPERATION ............................................................................... |
4 |
STORAGE ................................................................................... |
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5 |
MAINTENANCE .......................................................................... |
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6 |
SPECIFICATIONS ...................................................................... |
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6 |
REPLACEMENT PARTS ............................................................ |
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6 |
TROUBLESHOOTING ................................................................ |
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7 |
ACCESSORIES .......................................................................... |
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7 |
ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ......... |
8 |
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WARRANTY INFORMATION ...................................... |
Back Cover |
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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.
ANSI/NFPA 58 and the Natural Gas Installation Code, CAN/ CGA B149.2. This instructs on the safe storage and handling of propane gases.
•This product has been approved for use in the Commonwealth of Massachusetts.
•Use only propane gas set up for vapor withdrawal.
•Provide adequate ventilation. Before using heater, provide at least a 2.5 square foot opening of fresh, outside air.
•For indoor use only. Do not use heater outdoors.
•Keep heater away from strong drafts, wind, water spray, rain, or dripping water.
•Do not use heater in occupied dwellings or in living or sleeping quarters.
•Do not use heater in a basement or below ground level. Propane gas is heavier than air. If a leak occurs, propane gas may sink to the lowest possible level.
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 toprovidetemporaryheatingofbuildingsunderconstruction,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 may 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 Petroleum Gas,
•Keep appliance area clear and free from combustible materials, gasoline, paint thinner, and other flammable vapors and liquids. Dust is combustible. Do not use heater in areas with high dust content.
•Minimum heater clearances from combustibles: Sides: 3 feet, Top: 6 feet.
•Keep heater at least six feet from propane tank(s).
•Keep propane tank(s) below 100° F.
•Use only the hose and factory preset regulator provided with the heater.
•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.
•Do not alter heater. Keep heater in its original state.
•Do not use heater if altered.
•Locate heater on stable and level surface if heater is hot or operating.
•Not intended for use on finished floors.
•Never block air inlet (bottom of shell) or air outlet (around top of shell) of heater.
•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. You must wait 15 minutes after turning heater off.
•To prevent injury, wear gloves when handling heater.
•Never attach duct work to heater.
•Turn off propane supply to heater when not in use.
•Use only original replacement parts. This heater must use de- sign-specific parts. Do not substitute or use generic parts. Improper replacement parts could cause serious or fatal injuries.
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103385-01F
PRODUCT IDENTIFICATION
Top
Shell
Thermocouple
Ignitor
Electrode
Burner Tube
Piezo Ignitor Button
OFF |
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LO |
HI |
MED |
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Valve Inlet |
Control Knob |
Base |
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Hose/Regulator
Assembly
Figure 1 - Product Identification
UNPACKING
1.Remove all packing items applied to heater for shipment. Keep plastic cover caps (attached to valve inlet 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. This provides fuel to the heater.
The Ignition System: The piezo ignitor lights main burner.
The Automatic Control System: This system causes the heater to shut down if the flame goes out.
PRODUCT IDENTIFICATION
UNPACKING 3
THEORY OF OPERATION
PROPANE SUPPLY
VENTILATION
PROPANE SUPPLY
You must provide propane gas and propane tank(s).
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/or CAN/CGA B149.2.
Your local library or fire department will have this booklet.
This heater will operate with a 20-pound propane tank. However, you can only operate it in the LOW position during mildly cool weather. At higher heat settings or during colder weather, you must use larger tanks.
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 minimum number of 100-pound tanks needed to run the heater. Connect tanks together with a manifold.
Average Temperature (°F) |
Number |
At Tank Location |
Of Tanks |
60° |
1 |
40° |
1 |
32° |
1 |
20° |
1 |
10° |
2 |
0° |
2 |
Less gas is vaporized at lower temperatures. Your local propane gas dealer will help you select the proper supply system.
VENTILATION
WARNING: Provide at least a 2.5 square foot opening of fresh, outside air while running heater. If proper fresh, outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater.
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103385-01F
INSTALLATION 4 OPERATION
To Start Heater
INSTALLATION
WARNING: Review and understand the warnings in the Safety Information section, page 2. They are needed to safely operate this heater. Follow all local codes when using this heater.
WARNING: Test all gas piping and connections for leaks after installation 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, page 3).
2.Connect fuel gas fitting on hose/regulator assembly to propane tank(s). Turn fuel gas fitting counterclockwise into threads on tank. Tighten firmly using a wrench. IMPORTANT: Tighten regulator with vent pointing down. Pointing vent down protects regulator from weather damage.
3.Connect hose to the valve inlet. Tighten firmly using a wrench. You must use the regulator supplied with heater even if propane tank has one.
4.Open propane supply valve on propane tank(s) slowly. Note: If not opened slowly, excess-flow check valve on propane tank may stop gas flow. If this happens, you may hear a click inside the regulator assembly, this is the check valve closing. To reset the excess flow check valve, close propane supply valve and open again slowly.
5.Check all connections for leaks. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak that must be corrected.
6.Close propane supply valve.
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Fuel Gas Fitting |
Propane |
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Supply Valve |
Hose |
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Regulator |
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Vent |
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(pointing down) |
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Propane Tank |
Valve Inlet
OFF |
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LO |
HI |
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MED |
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Hose
Figure 3 - Hose and Valve Inlet
OPERATION
WARNING: Review and understand the warnings in the Safety Information section, page 2. They are 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 drafts do not blow on heater.
3.Make sure unit is turned off by slightly depressing and turning control knob fully clockwise to OFF.
4.Open propane supply valve on propane tank(s) slowly. Note: If not opened slowly, excess-flow check valve on propane tank may stop gas flow. If this happens, you may hear a click inside the regulator assembly, this is the check valve closing. To reset the excess flow check valve, close propane supply valve and open again slowly.
5.Slightly depress and turn control knob counterclockwise to the LOW position (see Figure 4).
6.With the control knob pushed all the way in, press and release the piezo ignitor button. Keep pressing piezo ignitor button until the burner lights. Hold control knob down for a maximum of 15 seconds while attempting ignition. If heater does not ignite, release control knob and wait 3 minutes before attempting reignition.
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Off |
Low |
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Continue Turning Knob |
Position |
Position |
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Counterclockwise to |
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MED and HI |
L |
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OFF |
OF |
HI |
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F |
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O |
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M |
ED |
HI |
LO |
ED |
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M |
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Figure 2 - Regulator With Vent Pointing Down |
Piezo Ignitor Button |
OFF
LO
MED
HI
Control
Knob
Figure 4 - Control Knob and Piezo Ignitor Button Locations
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103385-01F
OPERATION |
5 |
To Start Heater (Cont.) |
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Flame Patterns |
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To Stop Heater |
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To Restart Heater |
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STORAGE |
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OPERATION
Continued
7.After ignition, hold control knob down for about 30 seconds. This activates the automatic control system.
8.When burner remains lit, set heater at the desired heat level by slightly depressing the control knob and turning it counterclockwise to the MED or HIGH settings (see Figure 4, page 4).
9.If burner goes out, turn off gas. Slightly depress and turn control knob fully clockwise to OFF. Check fuel supply. If adequate fuel is available, restart heater beginning at step #1, page 4.
FLAME PATTERNS
Figure 5 shows a correct flame pattern. The burner flame is mostly blue with a slight yellow coloring on the ends.
Figure 6 shows an incorrect flame pattern. The flame is mostly yellow. The incorrect flame pattern results from low gas pressure or from flashback.
CAUTION: Running heater below specified input rating may cause flashback. During flashback, the burner flame is mostly yellow. The flame will burn inside the burner tube, causing a roaring noise. If flashback occurs, turn heater off. After burner tube cools, restart the heater.
Yellow Flame
Flame Inside |
Blue |
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Flame |
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Burner Tube |
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(makes roaring |
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noise) |
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Figure 6 - Incorrect Flame Pattern During Flashback
Slight Yellow
Coloring on
Flame Ends
Blue
Burner 
Flame
Tube
Figure 5 - Correct Flame Pattern at High Position
TO STOP HEATER
1.Tightly close propane supply valve on propane tank(s). Allow heater to burn remaining fuel in hose.
2.Shut off burner. Do this by pushing in the control knob and turning clockwise to the OFF position.
TO RESTART HEATER
1.Wait five minutes after stopping heater.
2.Restart heater by following steps under To Start Heater, page 4.
STORAGE
CAUTION: Disconnect heater from propane supply tank(s).
1.Store propane tank(s) in safe manner. Refer to Chapter 5 of
Standard for Storage and Handling of Liquefied Petroleum Gases, ANSI/NFPA 58 and/or 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 a dry, clean, and safe place.
For more information, visit www.desatech.com
103385-01F
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