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Installation Manual
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 followed
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 qualified
installer, service agency, or the gas supplier.
For more information, visit www.desatech.com
Save this manual for future reference.
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Table of Contents
Related Manuals for Desa 10542
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 followed exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.
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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 IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, oper- ate, or service this heater. Im- proper use of this heater can cause serious injury or death from burns, fire, explosion, elec- trical shock, and carbon mon- oxide poisoning. -
Page 4: Local Codes
Cabinet Glass Panel Front Panel Grill Guard Figure 1 - Vent-Free Gas Heater UNPACKING 1. Remove heater from carton. 2. Remove all protective packaging applied to heater for shipment. 3. Check heater for any shipping damage. If heater is damaged, promptly inform dealer where you bought heater. -
Page 5: Air For Combustion And Ventilation
AIR FOR COMBUSTION AND VENTILATION WARNING: This heater shall not be installed in a confined space or unusually tight con- struction unless provisions are provided for adequate combus- tion and ventilation air. Read the following instructions to in- sure proper fresh air for this and other fuel-burning appli- ances in your home. -
Page 6: Air For Combustion
Vent-free heater ______________ Btu/Hr Gas water heater* ______________ Btu/Hr Gas furnace ______________ Btu/Hr Vented gas heater ______________ Btu/Hr Gas fireplace logs ______________ Btu/Hr Other gas appliances* + __________ Btu/Hr Total = __________ Btu/Hr * Do not include direct-vent gas appliances. Di- rect-vent draws combustion air from the outdoors and vents to the outdoors. -
Page 7: Installation
AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining un- confined space. When ventilating to an adjoining unconfined space, you must provide two perma- nent openings: one within 12" of the ceiling and one within 12"... - Page 8 INSTALLATION Continued INSTALLATION ITEMS Before installing heater, make sure you have the items listed below. • for propane/LP gas, external regulator (supplied by installer) • piping (check local codes) • sealant (resistant to propane/LP gas) • equipment shutoff valve * •...
- Page 9 INSTALLATION Continued THERMOSTAT SENSING BULB (Thermostat Models Only) The thermostat sensing bulb has been placed be- low the heater. 1. Place clamp on thermostat sensing bulb as shown in Figure 5. Clamp is provided in hard- ware package. 2. Snap clamp into upper mounting hole as shown in Figure 5.
- Page 10 INSTALLATION Continued 2. Mark screw locations on wall (see Figure 8). Note: Only mark last hole on each end of mounting bracket. Insert mounting screws through these holes only. 3. Remove tape and mounting bracket from wall. " 13" Min. Only Insert Mounting Screws Through Last Hole On Each End...
- Page 11 INSTALLATION Continued Placing Heater On Mounting Bracket 1. Locate two horizontal slots on back panel of heater. 2. Place heater onto mounting bracket. Slide horizontal slots onto stand-out tabs on mount- ing bracket. Horizontal Slots Mounting Bracket (attached to wall) Figure 11 - Mounting Heater Onto Mounting Bracket Installing Bottom Mounting Screws...
- Page 12 INSTALLATION Continued 3. For carpeted floors, make a small cut with a sharp knife at marked locations prior to drill- ing. If mounting base to a wood floor, drill 1/8 inch diameter hole, 3/4 inch deep. (Do not use anchors in wood floors). If mounting base to a concrete floor, drill with 1/4 inch diameter concrete drill bit, 1 into floor.
- Page 13 INSTALLATION Continued WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas. Install sediment trap in supply line as shown in Figure 15. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapped matter is not likely to freeze.
- Page 14 INSTALLATION Continued Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa) 1. Close equipment shutoff valve (see Figure 16). 2. Pressurize supply piping system by either opening propane/LP supply tank valve for propane/LP gas or opening main gas valve lo- cated on or near gas meter for natural gas, or using compressed air.
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Page 15: Operating Heater
OPERATING HEATER MANUAL CONTROL MODELS FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not fol- low these instructions exactly, a fire or explosion may result causing property damage, per- sonal injury or loss of life. A. This appliance has a pilot which must be lighted by hand. - Page 16 OPERATING HEATER Continued TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1. Turn control knob clockwise OFF position. 2. Turn off all electric power to the appliance if service is to be performed. Shutting Off Burner Only (pilot stays lit) Turn control knob clockwise LOT position.
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Page 17: Thermostat Control
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 igni- tor button until pilot lights. Note: If pilot does not stay lit, refer to Troubleshooting, page 20. -
Page 18: Inpecting Heater
INPECTING HEATER Check pilot flame pattern and burner flame pat- tern often. PILOT FLAME PATTERN Figure 23 shows a correct pilot flame pattern. Fig- ure 24 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermo- couple. -
Page 19: Cleaning And Maintenance
CLEANING AND MAINTENANCE WARNING: Turn off heater and let cool before cleaning. CAUTION: You must keep control areas, burner, and cir- culating air passageways of heater clean. Inspect these ar- eas of heater before each use. Have heater inspected yearly by a qualified service person. -
Page 20: Troubleshooting
WARNING: Turn off and unplug heater and let cool before servic- ing. 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 When ignitor button is pressed, there is no spark at ODS/pilot... - Page 21 OBSERVED PROBLEM ODS/pilot lights but flame goes out when control knob is released Burner does not light after ODS/ pilot is lit Delayed ignition of burner Burner backfiring during com- bustion 113680-01A TROUBLESHOOTING Continued POSSIBLE CAUSE 1. Control knob not fully pressed in 2.
- Page 22 OBSERVED PROBLEM Yellow flame during burner com- bustion Slight smoke or odor during ini- tial operation Heater produces a whistling noise when burner is lit White powder residue forming within burner box or on adjacent walls or furniture TROUBLESHOOTING Continued POSSIBLE CAUSE 1.
- Page 23 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. Follow the gas supplier’s instructions.
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Page 24: Specifications
14" 14" 11" 11" x 25 x 8 24 x 27 25 lbs. 21 lbs. 30 lbs. 25 lbs. www.desatech.com 10542/10544 5,000/10,000 Natural Piezo 3" W.C. 10.5" 4" x 17 x 13 x 20 24 x 16 x 9 16 lbs. -
Page 25: Service Hints
Heating Products’ Technical Service Department at 1-866-672-6040. When calling please have your model and serial numbers of your heater ready. You can also visit DESA Heating Products’ tech- nical service web site at www.desatech.com. SERVICE PUBLICATIONS You can purchase a service manual from the address listed on the back page of this manual. -
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 www.desatech.com 19-1 19-2 113680-01A... - Page 27 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 Manual NG 114422-01 113644-01 113588-01 114011-01 113581-01...
- Page 28 ILLUSTRATED PARTS BREAKDOWN 10,000, 20,000, AND 30,000 BTU/HR TERMOSTAT MODELS 10544, 10545, 10546, 10547, 10548 AND 10549 19-1 19-2 19-1 19-2 www.desatech.com 8 21 113680-01A...
- Page 29 10,000, 20,000, AND 30,000 BTU/HR TERMOSTAT 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 KEY 10544(10NG) 10546(20NG) 10548(30NG) 10545(10LP) 10547(20LP) 114422-01 114422-02 114422-03 113644-01...
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Page 30: Accessories
If they can not supply these accessories, ei- ther 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
These Parts Centrals are privately owned businesses. They have agreed to support our customer’s needs by providing original replacement parts and accessories. Tool & Equipment Company 1348 Dixwell Avenue Hamden, CT 06514-0322 1-800-397-7553 203-248-7553 Parts Department Portable Heater Parts 342 N. County Rd. 400 East Valparaiso, IN 46383-9704 All States 219-462-7441... -
Page 32: Warranty Information
We make no other warranty, expressed or implied. VENT-FREE RESIDENTIAL GAS HEATERS DESA Heating Products warrants this product to be free from defects in materials and components for two (2) years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.