Desa VGL30PRA, VGL18PRA, VGL18NRA, VGL24NRA, VGL24PRA User Manual

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UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Also Design-Certified As Vented Decorative Appliances When
Not Used With Hand-Held Thermostat Remote
MODELS VGL18NRA, VGL18PRA VGL24NRA, VGL24PRA VGL30NRA, VGL30PRA
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.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
— Installation and service must be performed by a quali-
fied installer, service agency or the gas supplier.
Save this manual for future reference.
For more information, visit www.desatech.com
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 a listed ventless firebox enclosure. It is design-certified 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 6 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 indi cated 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
TABLE OF CONTENTS
Safety Information ............................................... 3
Product Identification ...........................................
Local Codes ........................................................ 5
Unpacking ........................................................... 5
Product Features ................................................. 5
Remote Control Accessories ...............................
Air For Combustion and Ventilation .....................
Installation ........................................................... 8
Operating heater ............................................... 19
Inspecting Burners ............................................ 22
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Cleaning and Maintenance ................................ 23
Troubleshooting .................................................
5
Wiring Diagram .................................................. 28
Service Hints ..................................................... 28
Technical Service ..............................................
5
Replacement Parts ............................................ 28
Specifications ....................................................
6
Accessories ....................................................... 29
Illustrated Parts Breakdown and Parts List ....... 30
Warranty Information ...........................
Back Cover
112882-01D
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24
28
28

SAFETY INFORMATION

WARNING: This product con­tains and/or generates chemicals known to the State of California to cause cancer or birth defects or other reproductive harm.
IMPORTANT: Read this owner’s manual carefully and completely be fore tr ying to assemb le, operate or service this heater. Improper use of this heater can cause serious injury or death from burns, fire, explosion, electrical shock and carbon monoxide poisoning.
DANGER: Carbon monoxide poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of carbon
monoxide poisoning resemble the flu, with head aches, dizziness or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, people with heart or lung disease or anemia, those under the influence of alcohol and those at high altitudes.
Natural and Propane/LP Gas: Natural and pro-
pane/LP gases are odorless. An odor-making agent is added to the gas. The odor helps you detect a gas leak. However, the odor added to the gas can fade. Gas may be present even though no odor exists.
Make certain you read and understand all warn ings. Keep this manual for reference. It is your guide to safe and proper operation of this heater.
WARNING: Any change to this heater or its controls can be dangerous.
WARNING: Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter burner flame patterns. Ceiling fans can create drafts that alter burner flame patterns. Altered burner patterns can cause sooting.
WARNING: Do not use a blow­er insert, heat exchanger insert or other accessory not approved for use with this heater.
Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies.
Do not place clothing or other flammable material on or near the appliance. Never place any
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objects on the heater.
Heater base assembly becomes very hot when running heater. Keep children and adults away from hot surface to avoid burns or clothing ignition. Heater will remain hot for a time after shutdown. Allow surface to cool before touching.
Carefully supervise young chil-
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dren when they are in the room with heater. When using the hand­held remote accessory, keep se­lector switch in the OFF position to prevent children from turning on burners with remote.
Keep the appliance area clear and free from combustible ma terials, gasoline and other flam­mable vapors and liquids.
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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) in side any structure. Locate propane/LP supply tank(s) outdoors (propane/LP units only).
3. To prevent performance problems, the use of a propane/LP fuel tank of less than 100 lb. capacity is not recommended (propane/LP units only).
4. 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
neighborʼs phone. Follow the gas supplierʼs instructions
• if you cannot reach your gas supplier, call
the fire department
5. This heater shall not be installed in a bedroom or bathroom unless installed as a vented appli ance (see Installing Damper Clamp Accessory
for Vented Operation,
6. Before installing in a solid fuel burning fire place, 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 before operating heater.
7. Do not burn solid-fuel in a masonry or UL127 factory-built fireplace in which a vent-free room heater is installed.
8. 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. Make sure there are no obstructions across openings of fireplace.
9. This log heater is designed to be smokeless. If logs ever appear to smoke, turn off heater and call a qualified service person. Note: During initial operation, slight smoking may occur due to log curing and heater burning manufacturing residues.
10. To prevent the creation of soot, follow the instructions in Cleaning and Maintenance, page 23.
page 12).
11. 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 or furniture.
12. This heater needs fresh, outside air ventilation
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to run properly. This heater has an Oxygen De pletion Sensing (ODS) safety shutoff system. The ODS shuts down the heater if not enough fresh air is available. See Air for Combustion and Ventilation, page 6. If heater keeps shutting off, see Troubleshooting, page 24.
13. Do not run heater
• where flammable liquids or vapors are used
or stored
• under dusty conditions
14. Do not use this heater to cook food or burn paper or other objects.
15. 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.
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16. Do not operate heater if any log is broken. Do not operate heater if a log is chipped (dime­sized or larger).
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17. Turn heater off and let cool before servicing, installing or repairing. Make sure the remote selector switch is in the OFF position. Only a qualified service person should install, service or repair heater.
18. Make sure the remote selector switch is in the OFF position when you are away from home for long periods of time.
19. This heater must not be connected to any external electrical source.
20. Operating heater above elevations of 4,500 feet may cause pilot outage.
21. Prov ide adeq ua te clearan ce s around air openings.
State of Massachusetts: The installa tion must be made by a licensed plumber or gas fitt er in the Common we alth of Massachusetts.
Sel lers of unvented propane or natural gas-fired supplemental room heaters shall provide to each purchaser a copy of 527 CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for bedroom and bathroom installation in the Commonwealth of Massachusetts.
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112882-01D
Left Top Log
Left Bottom Log

PRODUCT IDENTIFICATION

Rear Log
Right Crossover Log
Electronic Ignitor Button
Ember Bed Burner
Optional Remote Control
Flame Adjustment Knob
Figure 1 - Vent-Free Gas Log Heater

LOCAL CODES

Install and use heater with care. Follow all local codes. In the absence of local codes, use the lat est edition of The National Fuel Gas Code, ANSI
Z223/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 attached to the heater base assembly. The data plates contain important warranty and safety information.
1. Remove logs and heater base assembly from
carton. Note: Do not pick up heater base as­sembly by back burner. This could damage heater.
2. Remove all protective packaging applied to logs and heater for shipment.
3. Check all items for any shipping damage. If damaged, promptly inform dealer where you bought heater.
Right Top Log
Right Bottom Log
Remote Sensor with Switch
Control Knob

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 realistic dancing, yellow flames. 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. This heater may also be operated as a vented decorative (ANSI Z21.60) product by opening flue damper (non-thermostat models only).
SAFETY PILOT
This heater has a pilot with an Oxygen Deple­tion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for vent-free room heaters. The ODS/pilot shuts off the heater if there is not enough fresh air.
ELECTRONIC IGNITION SYSTEM
This heater has an electronic ignitor. This system re­quires no matches or other sources to light heater.
REMOTE CONTROL
ACCESSORIES
There are two optional remote controls that can be purchased separately for this log heater:
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 29.
The hand-held thermostat may not be used where vented decorative listing is required.
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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.
Todayʼs homes are built more energy efficient than ever. New materials, 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 effi cient, 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 fol lowing ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 6 through 8 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.
Unusually tight construction is defined as construction where:
a. walls and ceilings exposed to the out
side atmosphere have a continuous water vapor retarder with a rating of one perm (6 x 10 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 8.
If your home does not meet all of the three criteria above, proceed to Determining Fresh-Air Flow For Heater Location.
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Confined Space 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 m 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.
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* Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them.
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kg per pa-sec-m2) or less
3
per kw) of the aggregate input
DETERMINING FRESH-AIR FLOW FOR FIREPLACE 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 fireplace 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)
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112882-01D
Or
Remove Door into Adjoining
Room, Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ve
ntilation Grills
Into Adjoining
Room,
Option 1
12"
12"
AIR FOR COMBUSTION
AND VENTILATION
Continued
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2,560 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 = (Maxi-
mum Btu/Hr the space can support)
Example: 2,560 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 fireplace
Gas water heater*
Gas furnace
Vented gas heater
Gas fireplace logs
Other gas appliances* + ________
Total = ________
* Do not include direct-vent gas appliances. Di
rect-vent draws combustion air from the outdoors and vents to the outdoors.
Example:
Gas water heater
Vent-free fireplace + ________
Total = ________
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)
79,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the 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 ad ditional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoin
ing 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.
B. Vent room directly to the outdoors. See Ventila
tion Air From Outdoors, page 8.
C. Install a lower Btu/Hr fireplace, if lower Btu/Hr
size makes room unconfined.
__________ Btu/Hr
__________ Btu/Hr
__________ Btu/Hr
__________ Btu/Hr
__________ Btu/Hr
__________ Btu/Hr
40,000
39,000
79,000
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support,
the space is an un-
confined 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.
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
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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.
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Figure 2 - Ventilation Air from Inside
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Building
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Outlet Air
Ventilated Attic
Outlet
A
ir
Inlet Air
Inlet Air
Ventilated
Crawl Space
To
Crawl
Space
To Attic
AIR FOR COMBUSTION
AND VENTILATION
Continued
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 thermostat­controlled power vent. Heated air entering the attic will activate the power vent.
Figure 3 - Ventilation Air from Outdoors

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 pri mary 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.
NOTICE: State or local codes may only allow operation of this appli ance in a vented configuration. Check your state or local codes.
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WARNING: A qualified ser­vice person must install heater. Follow all local codes.
WARNING: If optional hand­held remote accessory has been installed, 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 before operating heater.
WARNING: Seal any fresh air vents or ash clean-out doors located on floor or wall of fire­place. If not, drafting may cause pilot outage or sooting. Use a heat-resistant 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
112882-01D
INSTALLATION
Continued
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 flu ids, 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 6 through 8.
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 heater. Call dealer where you bought heater for proper type heater.
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LOG SIZING REQUIREMENTS
Log Front Rear Size Height Depth Width Width*
18",24", 17" 13" 28" 21" 30"
Minimum Firebox Size With Blower
18",24", 17" 14" 34" 22 30"
*Measured at 13" depth 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 opening (see Figure 4).
Note: When installing your gas logs into
a man uf actur ed fireb ox , foll ow fir ebox manufacturerʼs 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.
Minimum Firebox Size
3
/8"
WARNING: This appliance is equipped for (natural or pro­pane/LP) gas. Field conversion
Example
is not permitted.
INSTALLATION AND CLEARANCES (Vent-Free Operation Only)
WARNING: Maintain the minimum clearances. If you can, provide greater clearances
*Minimum 16 inches from Side Wall
Figure 4 - Minimum Clearance for Side
Combustible Material, Side Wall and
Ceiling
*
from floor, ceiling and adjoining wall.
NOTICE: Manual control heaters may be used as a vented product.
MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size Side Wall Ceiling
18", 24", 30" 16" 42"
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 Operation, page 12.
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Heat Resistant Material
(A)
INSTALLATION
Continued
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 below.
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" up (for all models). If noncombus tible material is less than 12", you must install the fireplace hood accessory (24" and 30" models only). See Figure 5 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,
Noncombustible Requirements Material for Safe Distance (A) Installation
12" or more Noncombustible
Between 8" and 12" Install fireplace hood
Less than 8" Noncombustible
page 12.
material okay.
accessory (GA6050, GA6052 or GA6053, see Accessories, page 29).
material must be extended to at least 8". See Between 8" and 12", above. If you cannot extend material, you must operate heater with flue damper open.
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" and 30" 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 on page 11 for minimum clearances.
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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 12.
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 Clearances
If you meet minimum clearance between mantel shelf and top of fireplace opening, a hood is not required (see Figure 6, page 11).
Determining Minimum Mantel Clearances When Using a Hood
If minimum clearances in Figure 6, page 11 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, page 11 when using hood.
NOTICE: Surface temperatures of adjacent walls and mantels be come hot during operation. Walls and mantels above the firebox may become hot to the touch. If installed properly, these tem peratures meet the requirements of the national product standard. Follow all minimum clearances shown in this manual.
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Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
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