Desa LSL3124N Owner's Operation And Installation Manual
Unvented (vent-free) gas log heater
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Variable Manually-Controlled Models Also Design-Certified As Vented Decorative Appliances
Echo Valley Oak Log Design
24" Variable Manually-Controlled Models
LSL3124N and LSL3124P
WARNING: If the information in this manual
is not followed exactly, a fire or explosion
may result causing property damage, per-
sonal 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.
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in which
it is installed. Provisions for adequate combustion and ventilation air must be provided. Refer
to Air for Combustion and Ventilation section on page 4 of this manual.
This appliance may be installed in an aftermarket,* permanently located, manufactured
(mobile) home, where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This appliance
is not convertible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
Save this manual for future reference.
Save this manual for future reference.
UNVENTED (VENT-FREE)
GAS LOG HEATER
OWNER'S OPERATION AND
INSTALLATION MANUAL
Meadowbrook Oak Log Design
24" Variable Thermostatically-Controlled Models
CDL3924NT and CDL3924PT
WARNING: Improper installation, adjust-
ment, alteration, service, or maintenance
can cause injury or property damage. Re-
fer to this manual for correct installation
and operational procedures. For assis-
tance or additional information consult a
qualified installer, service agency, or the
gas supplier.
WARNING: This appliance is for installa-
tion only in a solid-fuel burning masonry
or UL127 factory-built fireplace, or in a
listed ventless firebox enclosure. It is de-
sign-certified for these installations in ac-
cordance with ANSI Z21.11.2. Exception:
Do not install this appliance in a factory-
built fireplace that includes instructions
stating it has not been tested or should not
be used with unvented gas logs.
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Summary of Contents for Desa LSL3124N
- Page 1 Variable Manually-Controlled Models Also Design-Certified As Vented Decorative Appliances Echo Valley Oak Log Design 24" Variable Manually-Controlled Models LSL3124N and LSL3124P WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, per- sonal injury, or loss of life.
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Page 2: Table Of Contents
TABLE OF CONTENTS SAFETY INFORMATION TABLE OF CONTENTS SAFETY INFORMATION ... 2 LOCAL CODES ... 3 UNPACKING ... 3 PRODUCT IDENTIFICATION ... 4 PRODUCT FEATURES ... 4 AIR FOR COMBUSTION AND VENTILATION ... 4 INSTALLATION ... 7 OPERATING HEATER ... 14 INSPECTING BURNERS ... -
Page 3: Safety Information
SAFETY INFORMATION Continued 1. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases. Do not place propane/LP supply tank(s) inside any structure. Lo- cate propane/LP supply tank(s) outdoors (propane/LP units only). -
Page 4: Product Identification
PRODUCT IDENTIFICATION PRODUCT FEATURES AIR FOR COMBUSTION AND VENTILATION PRODUCT IDENTIFICATION Control Cover Control Knob Echo Valley Oak Logs with Manual Control Control Control Cover Log Knob Meadowbrook Oak Logs with Thermostat Control Figure 1 - Product Identification For more information, visit www.desatech.com For more information, visit www.desatech.com PRODUCT FEATURES OPERATION... -
Page 5: Providing Adequate Ventilation
AIR FOR COMBUSTION AND VENTILATION Continued PROVIDING ADEQUATE VENTILATION The following are excerpts from National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation. All spaces in homes fall into one of the three following ventilation classifications: 1. -
Page 6: Ventilation Air
AIR FOR COMBUSTION AND VENTILATION Determining Fresh-Air Flow for Heater Location (Cont.) Ventilation Air AIR FOR COMBUSTION AND VENTILATION Continued The space in the above example is a confined space because the actual Btu/ Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. -
Page 7: Installation
INSTALLATION NOTICE: This heater is intended for use as supple- mental heat. Use this heater along with your primary heating system. Do not install this heater as your primary heat source. If you have a central heating system, you may run system’s circulating blower while using heater. - Page 8 INSTALLATION Installation and Clearances for Vent-Free Operation (Cont.) INSTALLATION Continued Carefully follow the instructions below. This will ensure safe installation into a masonry, UL127-listed manufactured fireplace, or listed vent-free firebox. Minimum Clearances For Side Combustible Material, Side Wall, and Ceiling A.
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Page 9: Mantel Clearances
INSTALLATION Continued MANTEL CLEARANCES In addition to meeting noncombustible material clearances, you must also meet required clearances between fireplace opening and mantel shelf. If you do not meet the clearances listed below, you will need a hood. Determining Minimum Mantel Clearance If you meet minimum clearance between mantel shelf and top of fireplace opening, a hood is not required (see Figure 6). -
Page 10: Installing Damper Clamp Accessory For Vented Operation
INSTALLATION Installing Damper Clamp Accessory for Vented Operation Installing Heater Base Assembly INSTALLATION Continued INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION Note: When used as a vented heater, appliance must be installed only in a solid-fuel burning fireplace with a working flue and constructed of noncombustible material. -
Page 11: Connecting To Gas Supply
INSTALLATION Continued 5. Center heater base and logs front-to-back and side-to-side in fireplace. 6. Carefully remove logs without moving heater base. 7. Mark screw locations through one hole on each side of the base (see Figure 12). If installing in a brick-bottom fireplace, mark screw locations in mortar joint of bricks. -
Page 12: Checking Gas Connections
INSTALLATION Connecting to Gas Supply (Cont.) Checking Gas Connections INSTALLATION Continued CAUTION: Avoid damage to regulator. Hold gas regulator with wrench when connecting it to gas piping and/or fittings. PROPANE/LP CSA Design-Certified Equipment From External Shutoff Valve With 1/8" NPT Tap* Regulator (11"... -
Page 13: Installing Logs
INSTALLATION Continued Equipment Shutoff Valve Gas Control Valve Location Figure 16 - Checking Gas Joints (Propane/LP only) Equipment Shutoff Valve Gas Control Valve Location Figure 17 - Checking Gas Joints (Natural Gas Only) INSTALLING LOGS WARNING: Failure to position the parts in accor- dance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury. -
Page 14: Operating Heater
INSTALLATION Installing Logs (Cont.) OPERATING HEATER (MANUALLY-CONTROLLED MODELS) For Your Safety Read Before Lighting Lighting Instructions INSTALLATION Continued Thermostat Models (CDL) 1. Place rear log on 2 pins on rear brackets (see Figure 21). 2. Place front log on grate fingers and over pins of rear log as shown in see Figure 21. -
Page 15: Operating Heater (Manually-Controlled Models)
OPERATING HEATER Continued Note: Home owners generally prefer to operate their heater with the chimney damper closed. This will put all the heat into the room. However, there may be times you will desire the full flames of the HI heat setting but will find the heat output excessive. -
Page 16: Before Lighting
OPERATING HEATER (MANUALLY-CONTROLLED MODELS) To Turn Off Gas to Appliance Manual Lighting Procedure OPERATING HEATER (THERMOSTAT MODELS) For Your Safety Read Before Lighting Lighting Instructions OPERATING HEATER Continued TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1. Remove control cover log (see Figure 23, page 15). 2. -
Page 17: Thermostat Control Operation
OPERATING HEATER Continued 1. STOP! Read the safety information in column 2, page 16. 2. Make sure equipment shutoff valve is fully open. 3. Turn control knob clockwise Clockwise 4. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. -
Page 18: For More Information, Visit Www.desatech.com For More Information, Visit Www.desatech.com
INSPECTING BURNERS Pilot Flame Pattern Burner Primary Air Holes Main Burner CLEANING AND MAINTENANCE Cleaning Burner Injector Holder and Pilot Air Inlet Hole INSPECTING BURNERS Check pilot flame pattern and burner flame patterns often. PILOT FLAME PATTERN Figure 27 shows a correct pilot flame pattern. Figure 28 shows an incorrect pilot flame pattern. -
Page 19: Specifications
CLEANING AND MAINTENANCE Continued Clean the pilot assembly also. A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly. There is a small pilot air inlet hole about two inches from where the pilot flame comes out of the pilot assembly (see Figure 30). -
Page 20: Troubleshooting
TROUBLESHOOTING TROUBLESHOOTING Note: For additional help, visit DESA Heating Products’ technical service web site at www.desatech.com. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM When ignitor button is pressed, there is no spark at ODS/pilot When ignitor button is pressed, there is... - Page 21 TROUBLESHOOTING Continued OBSERVED PROBLEM Burner does not light after ODS/pilot is lit Delayed ignition of one or both burners Burner backfiring during combustion Slight smoke or odor during initial opera- tion Heater produces a whistling noise when burners are lit White powder residue forming within burner box or on adjacent walls or furniture Moisture/condensation noticed on windows...
- Page 22 TROUBLESHOOTING 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. Follow the gas supplier’s instructions.
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Page 23: Optional Positioning Of Thermostat Sensing Bulb
OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB For Masonry and Factory-Built Metal Fireplace If your log set cycles to pilot, but the room temperature drops to a lower than ideal comfort level before the log set comes back on, you may want to reposition the thermostat sensing bulb. The thermostat sensing bulb is located near the gas valve assembly on the mounting bracket. -
Page 24: Illustrated Parts Breakdown And Parts List
ILLUSTRATED PARTS BREAKDOWN Models LSL3124N and LSL3124P ILLUSTRATED PARTS BREAKDOWN VARIABLE MANUALLY- CONTROLLED ECHO VALLEY OAK LOG MODELS LSL3124N, LSL3124P 28-5 28-1 28-4 28-3 28-2 3 - ODS Pilot (Natural Gas) 3 - ODS Pilot (Propane/LP) For more information, visit www.desatech.com For more information, visit www.desatech.com... -
Page 25: Parts List
111501-02 Right Front Log 111501-03 Control Cover Log 111501-04 Back Log 111501-05 Left Crossover Log PARTS AVAILABLE — NOT SHOWN 100563-01 Warning Plate 101055-02 Lighting Instruction Plate GA6060 Lava Rock 101137-02 Hardware Kit PARTS LIST Models LSL3124N and LSL3124P QTY. - Page 26 ILLUSTRATED PARTS BREAKDOWN Models CDL3924NT and CDL3924PT ILLUSTRATED PARTS BREAKDOWN THERMOSTATICALLY- CONTROLLED MEADOWBROOK OAK LOG MODELS CDL3924NT, CDL3924PT 24-3 24-4 24-2 24-1 For more information, visit www.desatech.com For more information, visit www.desatech.com 111347-01B...
- Page 27 PARTS LIST THERMOSTATICALLY- CONTROLLED MEADOWBROOK OAK LOG 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. CDL3924NT 102772-01 104285-01 098249-01 098271-10 099387-09 099056-16 111124-01 111195-04 098867-14 M11084-38...
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Page 28: Accessories
Purchase these heater accessories from your local dealer. If they can not supply these accessories, 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 29: Owner's Registration Form
Address: City: Home Phone: E-Mail: Please answer the following questions to register your product with DESA Heating Products: 1. Where will the product be used? Living/Family Room Office/Warehouse If you bought this product yourself, did you plan to purchase this type of product before going into the store? 3. - Page 30 Postage Required 2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 For more information, visit www.desatech.com For more information, visit www.desatech.com TAPE 111347-01B...
- Page 31 NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ For more information, visit www.desatech.com For more information, visit www.desatech.com 111347-01B NOTES...
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Page 32: Limited Warranty
DESA Heating Products warrants this product to be free from defects in materials and components for four (4) years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions. To make a claim under this warranty the Bill of Sale or cancelled check must be presented.
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