UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
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VF-24N-PDG, VF-24P-PDG, |
VF-24N-BTB, VF-24P-BTB, |
VF-18N-PDG, VF-18P-PDG |
VF-18N-BTB, VF-18P-BTB |
Design Dynamics Vent-free 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, 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.
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual for correct installation and operational procedures. For assistance or additional information consult a qualified installer, service agency, or the gas supplier.
WARNING: This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-built fireplace, or in an approved ventless firebox. It is designcertified for these installations in accordance 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.
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,* 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.
Warning: This product must be installed by a Licensed Plumber or Gas Fitter when installed within The Commonwealth of Massachusetts.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
Save this manual for future reference.
TABLE OF CONTENTS 2 SAFETY INFORMATION
TABLE OF CONTENTS
SAFETY INFORMATION.............................................................. |
2 |
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CLEANING AND MAINTENANCE ............................................. |
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18 |
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PRODUCT IDENTIFICATION....................................................... |
3 |
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TROUBLESHOOTING................................................................ |
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19 |
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OPTIONAL REMOTE CONTROL ACCESSORIES...................... |
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SPECIFICATIONS ...................................................................... |
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22 |
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LOCAL CODES ............................................................................ |
4 |
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WIRING DIAGRAM ................................................................... |
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23 |
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UNPACKING................................................................................. |
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SERVICE HINTS ........................................................................ |
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23 |
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PRODUCT FEATURES ................................................................ |
4 |
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TECHNICAL SERVICE............................................................... |
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23 |
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AIR FOR COMBUSTION AND VENTILATION ............................. |
4 |
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REPLACEMENT PARTS ............................................................ |
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23 |
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INSTALLATION............................................................................. |
7 |
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ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ......... |
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OPERATING HEATER................................................................ |
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ACCESSORIES.......................................................................... |
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27 |
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INSPECTING BURNERS ........................................................... |
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WARRANTY INFORMATION ...................................... |
Back Cover |
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SAFETY INFORMATION |
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WARNING: Any change to this heater or its con- |
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WARNINGS |
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trols can be dangerous. |
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IMPORTANT: Read this owner’s manual carefully and |
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WARNING: Do not allow fans to blow directly |
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completely before trying to assemble, operate, or ser- |
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into the fireplace. Avoid any drafts that alter burner |
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vice this heater. Improper use of this heater can cause |
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flame patterns. Ceiling fans can create drafts that |
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serious injury or death from burns, fire, explosion, elec- |
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alter burner flame patterns. Altered burner patterns |
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trical shock, and carbon monoxide poisoning. |
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can cause sooting. |
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DANGER: Carbon monoxide poisoning may lead |
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Due to high temperatures, the appliance should be |
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located out of traffic and away from furniture and |
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to death! |
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draperies. |
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Carbon Monoxide Poisoning: Early signs of carbon monoxide |
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poisoning resemble the flu, with headaches, dizziness, or nausea. |
Do not place clothing or other flammable material |
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If you have these signs, the heater may not be working properly. |
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on or near the appliance. Never place any objects |
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Get fresh air at once! Have heater serviced. Some people are more |
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on the heater. |
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affected by carbon monoxide than others. These include pregnant |
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women, people with heart or lung disease or anemia, those under |
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Heater base assembly becomes very hot when run- |
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the influence of alcohol, and those at high altitudes. |
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Natural and Propane/LP Gas: Natural and propane/LP gases are |
ning heater. Keep children and adults away from hot |
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surface to avoid burns or clothing ignition. Heater will |
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odorless. An odor-making agent is added to the gas. The odor helps |
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remain hot for a time after shutdown. Allow surface |
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you detect a gas leak. However, the odor added to the gas can fade. |
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to cool before touching. |
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Gas may be present even though no odor exists. |
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Make certain you read and understand all warnings. Keep this |
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Carefully supervise young children when they are |
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manual for reference. It is your guide to safe and proper operation |
in the room with heater. When using the hand-held |
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of this heater. |
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remote accessory (Remote-Ready Models Only),keep |
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selector switch in the OFF position to prevent children |
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WARNING:This product contains and/or generates |
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from turning on burners with remote. |
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chemicals known to the State of California to cause |
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cancer or birth defects, or other reproductive harm. |
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You must operate this heater with a fireplace screen |
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in place. Make sure fireplace screen is closed before |
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WARNING: Do not use a blower insert, heat ex- |
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running heater. |
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changer insert, or other accessory not approved for |
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Keep the appliance area clear and free from com- |
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use with this heater. |
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bustible materials, gasoline, and other flammable |
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WARNING: Vent-free products are prohibited |
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vapors and liquids. |
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for bedroom and bathroom installation in |
the |
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WARNING: Do not place log scraps or lava rocks |
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Commonwealth of Massachussets. |
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on burner. |
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For more information, visit www.desatech.com
111826-01F
SAFETY INFORMATION |
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.
2.Do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outdoors (propane/LP units only).
3.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
•if you cannot reach your gas supplier, call the fire department
4.This heater shall not be installed in a bedroom or bathroom, unless installed as a vented appliance. See Installing Damper Clamp Accessory for Vented Operation, page 10.
5.Before installing in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned of soot, creosote, ashes and loose paint by a qualified chimney cleaner. Creosote will ignite if highly heated. Inspect chimney flue for damage. If damaged, repair flue damper before operating heater.
6.If fireplace has glass doors, never operate this heater with glass doors closed. If you operate heater with doors closed, heat buildup inside fireplace will cause glass to burst. Also if fireplace opening has vents at the bottom, you must open the vents before operating heater.
7.To prevent the creation of soot, follow the instructions in Cleaning and Maintenance, page 18.
8.Before using furniture polish, wax, carpet cleaner, or similar products, turn heater off. If heated, the vapors from these products may create a white powder residue within burner box or on adjacent walls and furniture.
9.This heater needs fresh, outside air ventilation to run properly. This heater has an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS shuts down the heater if enough fresh air is not available. See Air for Combustion and Ventilation, pages 4 through 6. If heater keeps shutting off, see Troubleshooting, pages 19 through 21.
10.Do not run heater
•where flammable liquids or vapors are used or stored
•under dusty conditions
11.Do not use this heater to cook food or burn paper or other objects.
12.Do not use heater if any part has been exposed to or under water. Immediately call a qualified service technician to inspect the room heater and to replace any part of the control system and any gas control which has been under water.
13.Do not operate heater if any log is broken. Do not operate heater if a log is chipped (dime-sized or larger).
14.Turn heater off and let cool before servicing, installing, or repairing. Make sure the selector switch is in the OFF position (Remote-Ready Models Only). Only a qualified service person should install, service, or repair heater.
15.Make sure the selector switch is in the OFF position when you are away from home for long periods of time (Remote-Ready Models Only).
16.Remote-Ready heaters do not to be connected to any external electrical source.
17.Operating heater above elevations of 4,500 feet may cause pilot outage.
18.To prevent performance problems, do not use propane/LP fuel tank of less than 100 lb. capacity (propane/LP units only).
19.Provide adequate clearances around air openings.
PRODUCT IDENTIFICATION
Log Set |
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Lava Rock |
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Piezo |
Control Knobs |
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Ignitor |
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Log Scraps |
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Chassis Assembly |
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REMOTE READY MODELS |
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Log Set |
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Lava Rock |
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Piezo |
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Ignitor |
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Remote |
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Log Scraps |
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Remote |
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Control |
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Reciever |
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Control Knobs |
Chassis Assembly |
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REMOTE CONTROLLED MODELS |
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Figure 1 - Product Identification
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111826-01F
OPTIONAL REMOTE CONTROL ACCESSORIES 4 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:
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wall switch |
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hand-held ON/OFF remote |
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wall thermostat |
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hand-held thermostat remote. |
See Accessories, page 27.
The wall thermostat or hand-held thermostat may not be used where vented decorative listing is required.
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for ventfree room heaters. The ODS/pilot shuts off the heater if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system requires no matches, batteries, or other sources to light heater.
LOCAL CODES
Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of The National Fuel Gas Code ANSI Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Note: Where listed vented decorative logs are required, thermostat operation is not permitted.
UNPACKING
CAUTION: Do not remove the data plates from the grate assembly. The data plates contain important warranty and safety information.
1.Remove log set assembly from carton. Note: Do not pick up assembly by logs. This could damage the unit. Always handle assembly by grate.
2.Remove control cover floor media components.
3.Remove all protective packaging applied to log set for shipment.
4.Check all items for any shipping damage. If damaged, promptly inform dealer where you bought heater.
PRODUCT FEATURES
OPERATION
This heater is clean burning. It requires no outside venting. There is no heat loss out a vent or up a chimney. Heat is generated by both realistic flames and glowing ceramic logs/coals. This heater is designed for vent-free operation with flue damper closed. It has been tested and approved to ANSI Z21.11.2 standard for unvented heaters. State and local codes in some areas prohibit the use of ventfree heaters. This heater may also be operated as a vented decorative (ANSIZ21.60)productbyopeningthefluedamper(Non-Thermostat Models Only).
AIR FOR COMBUSTION AND VENTILATION
WARNING: This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.
Today’shomesarebuiltmoreenergyefficientthanever.Newmaterials, increased insulation, and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, home owners want their homes as airtight as possible.
While it is good to make your home energy efficient, your home needs to breathe. Fresh air must enter your home. All fuel-burning appliances need fresh air for proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and fuel burning appliances draw air from the house to operate.You must provide adequate fresh air for these appliances. This will insure proper venting of vented fuel-burning appliances.
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.Unusually Tight Construction
2.Unconfined Space
3.Confined Space
The information on pages 4 through 6 will help you classify your space and provide adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.
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111826-01F
AIR FOR COMBUSTION AND VENTILATION |
5 |
Providing Adequate Ventilation (Cont.) |
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Determining Fresh-Air Flow for Heater Location |
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AIR FOR COMBUSTION AND
VENTILATION
Continued
Unusually tight construction is defined as construction where:
a.walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of one perm (6 x 10-11 kg per pa-sec-m2) or less with openings gasketed or sealed and
b.weather stripping has been added on openable windows and doors and
c.caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines, and at other openings.
If your home meets all of the three criteria above, you must provide additional fresh air. See Ventilation Air From Outdoors, page 6.
If your home does not meet all of the three criteria above, proceed to Determining Fresh-Air Flow For Heater Location, below.
Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.
* Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them.
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this work sheet to determine if you have a confined or unconfined space.
Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.
1.Determine the volume of the space (length x width x height). Length x Width x Height = ____________cu. ft. (volume of space)
Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.
2.Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support.
____________(volume of space) x 20 = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximum Btu/Hr the space can support)
3.Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater |
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_____________ Btu/Hr |
Gas water heater* |
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_____________ Btu/Hr |
Gas furnace |
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_____________ Btu/Hr |
Vented gas heater |
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_____________ Btu/Hr |
Gas fireplace logs |
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_____________ Btu/Hr |
Other gas appliances* + |
_____________ Btu/Hr |
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Total |
= |
_____________ Btu/Hr |
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
Example: |
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40,000 |
Gas water heater |
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_____________ Btu/Hr |
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Vent-free heater |
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33,000 |
_____________ Btu/Hr |
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Total |
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73,000 |
_____________ Btu/Hr |
4.Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
____________________Btu/Hr (maximum the space can support)
____________________Btu/Hr (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space can support) 73,000 Btu/Hr (actual amount of Btu/Hr used)
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. Your options are as follows:
A.Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.
B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.
C.Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.
WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 Section 5.3 or applicable local codes.
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111826-01F
6 |
AIR FOR COMBUSTION AND VENTILATION |
Ventilation Air |
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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" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2). You can also remove door into adjoining room (see option 3, Figure 2). Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic will activate the power vent.
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Ventilation |
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Grills |
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Into Adjoining |
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Room, |
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Remove |
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Option 1 |
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Door into |
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Adjoining |
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12" |
Figure 2 - Ventilation Air from Inside Building
Ventilated
Outlet Attic
Air
Outlet 
Air
To Attic
To
Crawl
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Inlet
Air
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Inlet Air |
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Ventilated |
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Crawl Space |
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Figure 3 - Ventilation Air from Outdoors
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111826-01F
INSTALLATION |
7 |
Check Gas Type |
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Installation and Clearances for Vent-Free Operation |
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INSTALLATION
NOTICE: This heater is intended for use as supplemental 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.This will help circulate the heat throughout the house. In the event of a power outage, you can use this heater as your primary heat source.
WARNING: A qualified service person must install heater. Follow all local codes.
NOTICE:State or local codes may only allow operation of this appliance in a vented configuration. Check your state or local codes.
WARNING: Make sure the selector switch is in the OFF position before installing heater.
WARNING: Before installing in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned of soot, creosote, ashes and loose paint by a qualified chimney cleaner. Creosote will ignite if highly heated. A dirty chimney flue may create and distribute soot within the house.Inspect chimney flue for damage. If damaged, repair flue damper before operating heater.
WARNING: Seal any fresh air vents or ash cleanout doors located on floor or wall of fireplace. If not, drafting may cause pilot outage or sooting.Use a heatresistant sealant. Do not seal chimney flue damper.
WARNING: Never install the heater
•in a bedroom or bathroom unless installed as a vented appliance, see page 10
•in a recreational vehicle
•where curtains, furniture, clothing, or other flammable objects are less than 42 inches from the front, top, or sides of the heater
•in high traffic areas
•in windy or drafty areas
CAUTION:This heater creates warm air currents. These currents move heat to wall surfaces next to heater. Installing heater next to vinyl or cloth wall coverings or operating heater where impurities (such as, but not limited to, tobacco smoke, aromatic candles, cleaning fluids, oil or kerosene lamps, etc.) in the air exist, may discolor walls or cause odors.
IMPORTANT: Vent-free heaters add moisture to the air. Although this is beneficial, installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See
Air for Combustion and Ventilation, pages 4 through 6.
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP) for your unit. If your gas supply is not correct, do not install fireplace. Call dealer where you bought fireplace for proper type fireplace.
INSTALLATION AND CLEARANCES FOR VENT-FREE OPERATION
WARNING: Maintain the minimum clearances. If you can, provide greater clearances from floor, ceiling, and adjoining wall.
MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size |
18", 24" |
Side Wall |
16" |
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Ceiling |
42" |
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Floor |
5" |
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LOG SIZING REQUIREMENTS
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Minimum Firebox Size |
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Log |
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Front |
Rear* |
Size |
Height |
Depth |
Width |
Width |
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18" |
17" |
14" |
24" |
20" |
24" |
17" |
14" |
28" |
22" |
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*Measured at 14" depth
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111826-01F
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.Clearances from the side of the fireplace cabinet to any combustible material and wall should follow diagram in Figure 4.
Example: The face of a mantel, bookshelf, etc. is made of combustible material and protrudes 3 1/2" from the wall. This combustible material must be 4" from the side of the fireplace cabinet (see Figure 4).
Note: When installing your gas logs into a manufactured firebox, follow firebox manufacturer’s instructions for minimum clearances to combustible materials.
B.Clearances from the top of the fireplace opening to the ceiling should not be less than 42 inches.
Example |
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*Minimum 16 inches from Side Wall
Figure 4 - Minimum Clearance for Combustible to Wall
noncombustible material behind it. Noncombustible material must extend at least 8" up (for all models). If noncombustible material is less than 12", you must install the fireplace hood accessory (24" and 30" Models Only). See Figure 5 for minimum clearances.
If Using Mantel
You must have noncombustible material(s) above the fireplace opening. Noncombustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have noncombustible material behind it. Noncombustible material must extend at least 8 inches up (for all models). If noncombustible material is less than 12", you must install the fireplace hood accessory (24" Models Only). Even if noncombustible material is more than 12", you may need the hood accessory to deflect heat away from your mantel shelf. See Figure 5 and Figures 6 and 7, page 9, for minimum clearances.
IMPORTANT: If you cannot meet these minimum clearances, you must operate heater with chimney flue damper open. Go to Installing Damper Clamp Accessory for Vented Operation, page 10.
Noncombustible |
Requirements for |
Material Distance (A) |
Safe Installation |
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12" or more |
Noncombustible material OK. |
Between 8" and 12" |
24" Models: Install fireplace hood ac- |
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cessory (GA6060, see Accessories, |
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page 27). |
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18" Model: Noncombustible mate- |
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rial OK. |
Less than 8" |
Noncombustible material must be ex- |
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tended to at least 8". See Between 8" |
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and 12", above. If you cannot extend |
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material, you must operate heater |
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with flue damper open. |
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NOTICE: Non thermostat controlled heaters maybe used as a vented product. If so, you must always run heater with chimney flue damper open. If running heater with damper open, noncombustible material above fireplace opening is not needed. Go to Installing Damper Clamp Accessory for Vented Operataion, page 10.
Heat Resistant 
Material
(A)
Minimum Noncombustible Material Clearances
If Not Using Mantel
Note: If using a mantel proceed to If Using Mantel. If not using a mantel, follow the information on this page.
You must have noncombustible material(s) above the fireplace opening. Noncombustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
For more information, visit www.desatech.com
111826-01F
INSTALLATION
Continued
MANTEL CLEARANCES
Inadditiontomeetingnoncombustiblematerialclearances,youmustalso 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).
Determining Minimum Mantel Clearance When
Using a Hood
If minimum clearances in Figure 6 are not met, you must have a hood. When using a hood there are still certain minimum mantel clearances required. Follow minimum clearances shown in Figure 7 when using hood.
NOTICE: Surface temperatures of adjacent walls and mantels become hot during operation.Walls and mantels above the firebox may become hot to the touch. If installed properly, these temperatures meet the requirement of the national product standard.Follow all minimum clearances shown in this manual.
NOTICE: If your installation does not meet the minimum clearances shown, you must do one of the following:
•operate the logs only with the flue damper open
•raise the mantel to an acceptable height
•remove the mantel
FLOOR CLEARANCES
A.If installing appliance on the floor level, you must maintain the minimum distance of 14" to combustibles (see Figure 8).
B.If combustible materials are less than 14" to the fireplace, you must install appliance at least 5" above the combustible flooring (see Figure 9).
INSTALLATION |
9 |
Mantel Clearances |
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Floor Clearances |
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Mantel Shelf |
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10" |
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Underside of |
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8" |
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Mantel Shelf |
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6" |
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2 1/2" |
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All minimum |
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distances are |
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in inches |
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Minimum Non- |
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Combustible |
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Log Set |
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Material |
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12" |
18" |
20" |
22" |
24" |
24" Models |
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8" |
14" |
17" |
19" |
20" |
18" Model |
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Top of Fireplace |
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Opening |
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Minimum Non- |
Distances to |
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Combustible |
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Underside of |
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Material Height |
Mantel |
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Figure 6 - Minimum Mantel Clearances Without Using Hood
Minimum Non-
Combustible
Material
12" |
Mantel Shelf |
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Underside of |
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10" |
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Mantel Shelf |
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8" |
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6" |
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All minimum |
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2 1/2" |
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distances are |
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in inches |
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18" |
Log Set |
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8" |
12" |
15" |
18"-24" Models |
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20" |
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Min. |
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Top of Fireplace |
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Opening |
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Hood |
Distances to |
(GA6050,GA6052, |
Underside of |
or GA6052) |
Mantel |
Figure 7 - Minimum Mantel Clearances When Using Hood
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Combustible |
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14" |
Material |
Hearth |
Min. |
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Combustible |
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Material |
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5" |
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Non-Combustible |
Min. |
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Material |
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Figure 8 - Minimum Fireplace |
Figure 9 - Minimum Fireplace |
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Clearances If Installed at Floor |
Clearances Above |
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Level |
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Combustible Flooring |
For more information, visit www.desatech.com
111826-01F
10 |
INSTALLATION |
Installing Damper Clamp Accessory for Vented Operation |
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Installing Heater Assembly |
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INSTALLATION
Continued
INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION
Note:When used as a vented decorative, appliance must be installed only in a solid-fuel burning fireplace with a working flue and constructed of noncombustible material.
If your heater is a non-thermostatically-controlled model, you may use this heater as a vented product. There are three reasons for operating your heater in the vented mode.
1.The fireplace does not meet the clearance to combustibles requirements for vent-free operation.
2.State or local codes do not permit vent-free operation.
3.You prefer vented operation.
If reasons number 1 or 2 above apply to you, you must permanently open chimney flue damper. You must install the damper clamp accessory (to order, see Accessories, page 27). This will insure vented operation (see Figure 10).The damper clamp will keep damper open. Installation instructions are included with clamp accessory.
See chart below for minimum permanent flue opening you must provide. Attach damper clamp so the minimum permanent flue opening will be maintained at all times.
Area of Various Standard
Round Flues
Diameter (ins.) |
Area (sq. ins.) |
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5" |
20 sq. inches |
6" |
29 sq. inches |
7" |
39 sq. inches |
8" |
51 sq. inches |
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Chimney |
Minimum Permanent |
Height (ft.) |
Flue Opening (sq. ins.) |
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6' to 15' |
39 sq. inches |
15' to 30' |
29 sq. inches |
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Damper Clamp
Damper Clamp
Damper |
Damper |
Damper
INSTALLING HEATER ASSEMBLY
WARNING: If installing in a sunken fireplace, special care is needed. You must raise the fireplace floor to allow access to heater control panel. This will insure adequate air flow and guard against sooting. Raise fireplace floor with noncombustible material. Make sure material is secure.
CAUTION: Do not pick up heater assembly by logs. This could damage unit. Only handle assembly by grates.
IMPORTANT: Make sure the heater burners are level. If heater is not level, heater will not work properly.
Installation Items Needed
•control cover kit (provided with heater)
•approved flexible gas hose and fittings (provided with heater) (if allowed by local codes)
•sealant (resistant to propane/LP gas, not provided)
Note: Install optional GHRCTA Receiver and Hand-Held Remote Control Kit (see Accessories, page 27) before installing gas log heater (Remote-Ready Models Only). See installation instructions included with the kit.
1.Apply pipe joint sealant lightly to male threads of gas fitting (not provided). Connect approved flexible gas hose to inlet side of gas control (see Figure 11).
2.Position heater assembly in fireplace.
3.Connect to gas supply. See Connecting To Gas Supply, (see Figure 12, page 11).
Gas Control
Flexible Gas Hose (if allowed by local codes)
Masonry Fireplace |
Manufactured Fireplace |
Figure 11 - Attaching Flexible Gas Hose to Heater Gas |
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Regulator |
Figure 10 - Attaching Damper Clamp
For more information, visit www.desatech.com
111826-01F
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