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UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER
SAFETY INFORMATION AND INSTALLATION MANUAL
MANUAL 10,000 BTU - 10542 AND 10543
THERMOSTAT 10,000 BTU - 10544 AND 10545
THERMOSTAT 20,000 BTU - 10546 AND 10547
THERMOSTAT 30,000 BTU - 10548 AND 10549
WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a quali-
fied installer, service agency or the gas supplier.
For more information, visit www.desatech.com
Save this manual for future reference.
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Summary of Contents for Desa 10542
- Page 1 UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER SAFETY INFORMATION AND INSTALLATION MANUAL MANUAL 10,000 BTU - 10542 AND 10543 THERMOSTAT 10,000 BTU - 10544 AND 10545 THERMOSTAT 20,000 BTU - 10546 AND 10547 THERMOSTAT 30,000 BTU - 10548 AND 10549 WARNING: If the information in this manual is not fol- lowed exactly, a fire or explosion may result causing...
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Page 2: Table Of Contents
WARNING: Improper installation, adjustment, altera- tion, service or maintenance can cause injury or prop- erty damage. Refer to this manual for correct installation and operational procedures. For assistance or addi- tional information consult a qualified installer, service agency or the gas supplier. WARNING: This is an unvented gas-fired heater. -
Page 3: Safety Information
SAFETY INFORMATION Do not place clothing or other flammable material on or near IMPORTANT: Read this owner’s the appliance. Never place any manual carefully and completely objects on the heater. before trying to assemble, operate or service this heater. Surface of heater becomes very Improper use of this heater can hot when running heater. -
Page 4: Local Codes
SAFETY INFORMATION Continued 6. Keep all air openings in front and bottom of Heater Ignitor Button Cabinet heater clear and free of debris. This will insure Control Knob enough air for proper combustion. 7. If heater shuts off, do not relight until you provide fresh, outside air. -
Page 5: Air For Combustion And Ventilation
AIR FOR COMBUSTION Unusually tight construction is defined as construction where: AND VENTILATION a. walls and ceilings exposed to the out- side atmosphere have a continuous WARNING: This heater shall water vapor retarder with a rating of not be installed in a confined one perm (6x10 kg per pa-sec-m ) or... - Page 6 AIR FOR COMBUSTION 4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used. AND VENTILATION _________Btu/Hr (maximum the space can support) Continued _________Btu/Hr (actual amount of Btu/Hr used) Example: 51,200 Btu/Hr (maximum the space DETERMINING FRESH-AIR FLOW can support) FOR HEATER LOCATION...
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Page 7: Installation
AIR FOR COMBUSTION AND VENTILATION Ventilated Outlet Attic Continued Outlet VENTILATION AIR A ir To Attic Ventilation Air From Inside Building This fresh air would come from an adjoining un- Crawl confined space. When ventilating to an adjoining Space unconfined space, you must provide two perma- Inlet nent openings: one within 12"... - Page 8 INSTALLATION CAUTION: This heater cre- Continued ates warm air currents. These INSTALLATION ITEMS currents move heat to wall sur- Before installing heater, make sure you have the faces next to heater. Installing items listed below. heater next to vinyl or cloth wall •...
- Page 9 INSTALLATION Continued THERMOSTAT SENSING BULB (Thermostat Models Only) The thermostat sensing bulb has been placed below the heater. 1. Place clamp on thermostat sensing bulb as shown in Figure 5. Clamp is provided in hardware package. 2. Snap clamp into upper mounting hole as shown in Figure 5.
- Page 10 INSTALLATION Attaching Mounting Bracket To Wall Note: Wall anchors, mounting screws and spacers Continued are in hardware package. The hardware package 2. Mark screw locations on wall (see Figure 8). is provided with heater. Note: Only mark last hole on each end of Attaching To Wall Stud Method mounting bracket.
- Page 11 INSTALLATION Continued Front View Heater Wall Spacer Side View Figure 12 - Installing Bottom Mounting Screws MOUNTING HEATER TO FLOOR Installing Bottom Mounting Screws WITH OPTIONAL FLOOR KIT 1. Locate two bottom mounting holes. These holes are near bottom on back panel of heater Mounting Base Feet to Heater (see Figure 12).
- Page 12 INSTALLATION For propane/LP gas, the installer must supply an external regulator. The external regulator will Continued reduce incoming gas pressure. You must reduce 3. For carpeted floors, make a small cut with a incoming gas pressure to between 11 and 14 inches sharp knife at marked locations prior to drill- of water.
- Page 13 CHECKING GAS CONNECTIONS WARNING: Test all gas piping and connections, internal and external to unit, for leaks after installing or servicing. Correct all leaks at once. WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak detec- tion fluid to all joints.
- Page 14 Meter Equipment Shutoff Valve Figure 17 - Checking Gas Joints for Natural Gas Propane/LP Supply Tank Equipment Shutoff Valve Figure 18 - Checking Gas Joints for Propane/LP Gas www.desatech.com 113680-01B...
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Page 15: Operating Heater
OPERATING HEATER 5. Press in control knob and turn counter- clockwise to the PILOT position. MANUAL CONTROL MODELS Keep control knob pressed in for five (5) seconds (see Figure 19). FOR YOUR SAFETY Note: You may be running this heater for READ BEFORE LIGHTING the first time after hooking up to gas sup- ply. - Page 16 OPERATING HEATER WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance. Continued • Do not touch any electric switch; do not TO TURN OFF GAS use any phone in your building. TO APPLIANCE • Immediately call your gas supplier from a neighborʼs phone.
- Page 17 OPERATING HEATER Continued 6. With control knob pressed in, push down and release ignitor button. This will light pilot. The pilot is attached to the front of the burner. If needed, keep pressing ignitor button until pilot lights. Note: If pilot does not stay lit, refer to Troubleshooting, page 20.
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Page 18: Inspecting Heater
INSPECTING HEATER BURNER FLAME PATTERN Check pilot flame pattern and burner flame pat- WARNING: If yellow tipping tern often. occurs, your heater could pro- PILOT FLAME PATTERN duce increased levels of carbon Figure 23 shows a correct pilot flame pattern. monoxide. -
Page 19: Cleaning And Maintenance
CLEANING AND 1. Shut off the unit, including the pilot. Allow the unit to cool for at least thirty minutes. MAINTENANCE 2. Inspect burner, pilot for dust and dirt. 3. Blow air through the ports/slots and holes in WARNING: Turn off heater the burner. -
Page 20: Troubleshooting
TROUBLESHOOTING WARNING: Turn off and unplug heater and let cool before servicing. Only a qualified service person should service and repair heater. CAUTION: Never use a wire, needle or similar object to clean ODS/pilot. This can damage ODS/pilot unit. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY... - Page 21 TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY ODS/pilot lights but flame 1. Control knob not fully pressed in 1. Press in control knob fully goes out when control knob is 2. Control knob not pressed in 2. After ODS/pilot lights, keep released long enough control knob pressed in 30...
- Page 22 TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Yellow flame during burner 1. Not enough air 1. Check burner for dirt and combustion debris. If found, clean burner (see Cleaning and Mainte- nance, page 19) 2. Gas regulator defective 2. Replace gas regulator 3.
- Page 23 TROUBLESHOOTING Continued WARNING: If you smell gas • Shut off gas supply. • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Fol- low the gas supplier’s instructions.
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Page 24: Specifications
SPECIFICATIONS 10548 10546 10542/10544 Btu (Variable) 15,000/30,000 10,000/20,000 5,000/10,000 Type Gas Natural Natural Natural Ignition Piezo Piezo Piezo Pressure Regulator Setting 3" W.C. 3" W.C. 3" W.C. Inlet Gas Pressure (in. of water) Maximum 10.5" 10.5" 10.5" Minimum 4" 4"... -
Page 25: Service Hints
• how heater was malfunctioning model and serial numbers of your heater ready. • type of gas used (propane/LP or natural gas) You can also visit DESA Heating Productsʼ techni- • purchase date cal service web site at www.desatech.com. Usually, we will ask you to return the part to the SERVICE PUBLICATIONS factory. -
Page 26: Illustrated Parts Breakdown And Parts List
ILLUSTRATED PARTS BREAKDOWN 10,000 BTU/HR MANUAL CONTROL MODELS 10542 AND 10543 19-1 19-2 19-1 19-2 www.desatech.com 113680-01B... -
Page 27: Parts List
PARTS LIST 10,000 BTU/HR MANUAL CONTROL MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual. PART NUMBER 10542 10543 Manual NG Manual LP DESCRIPTION QTY. - Page 28 ILLUSTRATED PARTS BREAKDOWN 10,000, 20,000 AND 30,000 BTU/HR THERMOSTAT MODELS 10544, 10545, 10546, 10547, 10548 AND 10549 19-1 19-2 8 21 19-1 19-2 www.desatech.com 113680-01B...
- Page 29 PARTS LIST 10,000, 20,000 AND 30,000 BTU/HR THERMOSTAT MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual. PART NUMBER 10544(10NG) 10546(20NG) 10548(30NG) 10545(10LP) 10547(20LP) 10549(30LP) DESCRIPTION...
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Page 30: Accessories
If they can not supply these accessories, either contact your nearest Parts Central (see page 31) or call DESA Heating Products at 1-866-672-6040 for referral information. You can also write to the address listed on the back page of this manual. -
Page 31: Parts Centrals
PARTS CENTRALS These Parts Centrals are privately owned businesses. They have agreed to support our customerʼs needs by providing original replacement parts and accessories. Tool & Equipment, Co. Washer Equipment Co. 5 Manila Ave 1715 Main Street Hamden, CT 06514-0322 Kansas City, MO 64108-2195 1-800-397-7553 KS, MO, AR... -
Page 32: Warranty Information
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Heat- ing Products Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product and/or DESA Heating Products who will provide original factory replacement parts.
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