Desa C Owner's Operation And Installation Manual
Unvented (vent-free) gas log heater, ("a" models) 18", 24", and 30" remote-ready (“c” models) 18", 24", and 30" variable manually-controlled (“b” models) 18", 24", and 30" thermostatically-controlled
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Remote-Ready and Variable Manually-Controlled Models
Also Design-Certified As Vented Decorative Appliances
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
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.
("A" Models) 18", 24", and 30"
Remote-Ready
("C" Models) 18", 24", and 30"
Variable Manually-Controlled
("B" Models) 18", 24", and 30"
LO
Thermostatically-Controlled
PILOT
OFF
HI
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Table of Contents
Related Manuals for Desa C
Summary of Contents for Desa C
- Page 1 ("A" Models) 18", 24", and 30" Remote-Ready (“C” Models) 18", 24", and 30" Variable Manually-Controlled (“B” Models) 18", 24", and 30" Thermostatically-Controlled...
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Page 2: Table Of Contents
TABLE OF CONTENTS SAFETY INFORMATION TABLE OF CONTENTS SAFETY INFORMATION ... 2 PRODUCT IDENTIFICATION ... 3 OPTIONAL REMOTE CONTROL ACCESSORIES ... 4 LOCAL CODES ... 4 UNPACKING ... 4 PRODUCT FEATURES ... 4 AIR FOR COMBUSTION AND VENTILATION ... 4 INSTALLATION ... -
Page 3: Product Identification
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: Optional Remote Control Accessories
OPTIONAL REMOTE CONTROL ACCESSORIES LOCAL CODES UNPACKING PRODUCT FEATURES AIR FOR COMBUSTION AND VENTILATION Providing Adequate Ventilation OPTIONAL REMOTE CONTROL ACCESSORIES There are four optional remote controls that can be purchased separately for Remote-Ready Models Only: • wall switch • hand-held ON/OFF remote •... -
Page 5: Air For Combustion And Ventilation
openings. - Page 6 AIR FOR COMBUSTION AND VENTILATION Ventilation Air AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two permanent openings: one within 12" of the ceiling and one within 12"...
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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 INSTALLATION Continued 3. Position heater base assembly in fireplace. 4. For Variable Manually-Controlled and Thermostatically-Con- trolled Models mark screw locations through holes in mount- ing brackets (see Figure 13). For Remote-Ready Models mark screw locations through holes in front panel of base (see Fig- ure 14).
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Page 12: Connecting To Gas Supply
INSTALLATION Connecting To Gas Supply INSTALLATION Continued CONNECTING TO GAS SUPPLY WARNING: This appliance requires a 1/2" NPT (National Pipe Thread) inlet connection to the pres- sure regulator. WARNING: A qualified service person must con- nect heater to gas supply. Follow all local codes. CAUTION: Never connect propane/LP fireplace directly to the propane/LP supply. -
Page 13: Checking Gas Connections
INSTALLATION Continued CSA Design-Certified Equipment Shutoff Valve With 1/8" NPT Tap* PROPANE/LP From External Regulator (11" W.C.** to 14" W.C. Pressure) NATURAL From Gas 3" Minimum Meter (5" W.C.** to 10.5" W.C. Pressure) Pipe Joint Nipple Sediment Trap Figure 16 - Gas Connection (Variable Manually-Controlled and... -
Page 14: Installing Logs
INSTALLATION Checking Gas Connections (Cont.) Installing Logs INSTALLATION Continued Pressure Testing Heater Gas Connections 1. Open equipment shutoff valve (see Figure 18). 2. Open main gas valve located on or near gas meter for natural gas or open propane/LP supply tank valve. 3. - Page 15 INSTALLATION Continued Notch Front Log (#1) Grate Prongs Metal Grate Bar Figure 21 - Installing Front Log (#1) [18" Variable Manually- Controlled Set Shown] Middle Log (#2) Groove Metal Post Metal Post Figure 22 - Installing Middle Log (#2) [18" Variable Manually- Controlled Set Shown] Note: Your appliance may vary from model shown but log placement will be the same.
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Page 16: Operating Heater
• If you cannot reach your gas supplier, call the fire de- partment. C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service techni-... -
Page 17: For Your Safety Read Before Lighting
• If you cannot reach your gas supplier, call the fire de- partment. C. Use only your hand to push in or turn the gas control knob. to the PILOT position. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service techni-... - Page 18 Selecting higher settings produces greater heat output. This results in increased heating comfort. WARNING: Do not operate heater between locked positions. CAUTION: Do not try to adjust heating levels by using the equipment shutoff valve. C-clockwise Control Knob Pilot Burner 104415-01L...
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Page 19: Before Lighting
OPERATING HEATER (REMOTE-READY MODELS) For Your Safety Read Before Lighting (Cont.) C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service techni- cian or gas supplier. -
Page 20: Manual Lighting
OPERATING HEATER (REMOTE-READY MODELS) Lighting Instructions (Cont.) To Turn Gas Off To Appliance Manual Lighting Procedure OPERATING HEATER Continued 5. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Fol- low “B”... - Page 21 The hand-held remote can be operated using either the manual mode (MANU) or thermostatic mode (AUTO) (see Figure 34). To select Fahrenheit/Centigrade mode display, carefully press the ˚C/˚F mode button with the end of a paper clip or similar blunt object. Manual Mode 1.
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Page 22: Inspecting Burners
OPERATING HEATER Optional Hand-Held Remote Operation (Cont.) INSPECTING BURNERS Pilot Flame Pattern Front Burner Flame Pattern OPERATING HEATER Continued Safety Features When away from home for an extended period of time or as a child safety feature to prevent accidental ignition of the fire- place, the receiver ON/OFF/REMOTE switch should be in the OFF position. -
Page 23: Cleaning And Maintenance
CLEANING AND MAINTENANCE WARNING: Turn off heater and let cool before cleaning. CAUTION: You must keep control areas, burners, and circulating air passageways of heater clean. In- spect these areas of heater before each use. Have heater inspected yearly by a qualified service person. Heater may need more frequent cleaning due to exces- sive lint from carpeting, pet hair, bedding material, etc. -
Page 24: 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 25 TROUBLESHOOTING Continued OBSERVED PROBLEM One or both burners do not light after ODS/ pilot is lit Delayed ignition of one or both burners Burner backfiring during combustion Yellow flame in front burner during burner combustion Slight smoke or odor during initial operation Heater produces a whistling noise when burners are lit White powder residue forming within burner...
- Page 26 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 27: Optional Positioning Of Thermostat Sensing Bulb
OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB (Thermostat-Controlled Models Only) 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. -
Page 28: Specifications
SPECIFICATIONS 18" Thermostat-Controlled Btu (Variable) 16,000/26,000 Type Gas Propane/LP Only - Natural Ignition Piezo Manifold Pressure 7.9" W.C. - 3.4" W.C. Inlet Gas Pressure (in. of water) Maximum 14" - 10.5" Minimum* 11" - 5" Shipping Weight 26 lbs. * For purpose of input adjustment 18"... -
Page 29: Wiring Diagram
If so, contact DESA 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’ technical services web site at www.desatech.com. For more information, visit www.desatech.com For more information, visit www.desatech.com... -
Page 30: Illustrated Parts Breakdown And Parts List
ILLUSTRATED PARTS BREAKDOWN Models VS18NVC, E18N, VS18PVC, E18P, VS24NVC, E24N, VS24PVC, E24P, VS30NVC and VS30PVC ILLUSTRATED PARTS BREAKDOWN VARIABLE MANUALLY- CONTROLLED SPLIT OAK MODELS VS18NVC, E18N, VS18PVC, E18P, VS24NVC, E24N, VS24PVC, E24P, VS30NVC AND VS30PVC 24" and 30" Models Only 18"... - Page 31 PARTS LIST VARIABLE MANUALLY-CONTROLLED SPLIT OAK MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 29 of this manual. VS18NVC VS18PVC E18N E18P 104388-01 104388-01 — — —...
- Page 32 ILLUSTRATED PARTS BREAKDOWN Models VS18NTB, VS18PTB, VS24NTB, VS24PTB, VS30NTB and VS30PTB ILLUSTRATED PARTS BREAKDOWN THERMOSTAT-CONTROLLED MODELS VS18NTB, VS18PTB, VS24NTB, VS24PTB, VS30NTB and VS30PTB 24" and 30" Models Only 18" Model Only For more information, visit www.desatech.com For more information, visit www.desatech.com 104415-01L...
- Page 33 PARTS LIST THERMOSTAT-CONTROLLED MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 29 of this manual. VS18NTB VS18PTB 104388-01 104388-01 — — — — 104390-01 104390-01 104392-01 104392-01 104394-01 104394-01...
- Page 34 ILLUSTRATED PARTS BREAKDOWN Models VS18NRA, E18NR, VS18PRA, E18PR, VS24NRA, E24NR, VS24PRA, E24PR, VS30NRA, E30NR, VS30PRA, and E30PR ILLUSTRATED PARTS BREAKDOWN REMOTE-READY VARIABLE CONTROL MODELS VS18NRA, E18NR, VS18PRA, E18PR, VS24NRA, E24NR, VS24PRA, E24PR, VS30NRA, E30NR, VS30PRA, and E30PR For more information, visit www.desatech.com For more information, visit www.desatech.com 24"...
- Page 35 PARTS LIST REMOTE-READY VARIABLE CONTROL This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 29 of this manual. VS18NRA VS18PRA E18NR E18PR 104388-01 104388-01 104390-01 104390-01 104392-01 104392-01 104394-01 104394-01 M11084-26...
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Page 36: Accessories
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 37: 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 38 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 104415-01L TAPE...
- Page 39 NOTES NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ For more information, visit www.desatech.com For more information, visit www.desatech.com 104415-01L...
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Page 40: Warranty Information
DESA Heating Products warrants this product to be free from defects in materials and components for four (4) years and five (5) years on stainless steel burners from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.