® UNVENTED (VENT-FREE) LogMate® Universal FireBOX OWNER’S OPERATION AND INSTALLATION MANUAL Model FBST 36" See-Thru Heat-Circulating Firebox WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. FOR YOUR SAFETY — Do not store or use gasoline or any other flammable vapors or liquids in the vicinity of this or any other appliance. — WHAT TO DO IF YOU SMELL GAS : • Do not try to light any appliance.
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: For use only with decorative type unvented room heaters. Do not build a wood fire. This firebox has been tested and approved by I.A.S. under their REQ. 2-97 for use with any ANS Z21.11.2 approved gas logs.
Safety Information IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate or service this firebox. Improper use of this firebox can cause serious injury or death from burns, fire, explosion, electrical shock or carbon monoxide poisoning. CAUTION: Carefully review the instructions supplied with the decorative type unvented room heater for the minimum firebox size requirement.
Safety Information Continued 12. Do not use the firebox if it has been under water due to the shock hazard that could result with the blower accessary (if installed) in place. 13. Provide adequate clearances around air openings. Local Codes Install and use firebox with care. Follow all local codes. In the absence of local codes, use the latest edition of The National Fuel Gas Code ANS Z223.1/NFPA 54*.
Locating Firebox Planning Plan where you will install the firebox. This will save time and money later when you install the firebox. Before installation, consider the following: 1. Where the firebox will be located. Allow for wall and ceiling clearances (see Installation Clearances, page 8). 2. Everything needed to complete installation. 3. These models CANNOT be installed in a bedroom or bathroom. 4. Proper air for combustion and ventilation. 5.
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 1011 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.
AIR FOR COMBUSTION AND VENTILATION Continued The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows: A. Rework work sheet, 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. B. Vent room directly to the outdoors.
Installation NOTICE: This firebox in combination with unvented log sets are intended for use as supplemental heat. Use along with your primary heating system. Do not install them 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 unvented logs as your primary heat source. WARNING: A qualified service person must install firebox.
INSTALLATION Continued Minimum clearances to combustibles are: • Sides of outer casing 0" min. • Drywall to sides and top of 0" min. front face • Ceiling to opening 42' min. • Floor (see Minimum Wall 0" min. and Ceiling Clearances, note C) • Perpendicular walls 4' min. Right and Left • Distance to Facing Walls 36" min. See Figures 5 and 6. Ceiling 0" Min. Clearance to Upper Frame/Wallboard 42" Min. CAUTION: Do not allow the vent-free gas log heater to touch or extend beyond the firebox screen.
INSTALLATION Continued 2. If the vent-free firebox is to be installed directly on carpeting, tile (other than ceramic) or any combustible material other than wood flooring; the vent-free firebox must be installed upon a metal or wood panel extending the full width and depth of the vent-free firebox. 3. If a raised platform is to be constructed, ceiling clearances must be maintained. 4. Install gas piping to firebox location.
INSTALLATION Continued Installing gas line WARNING: A qualified service person must connect heater to gas supply. Follow all local codes. IMPORTANT: See Connecting to Gas Supply in your log set owner’s manual for details on gas hookup. You may run the gas line from either side of the firebox (see Figure 11). When you have determined how the gas line will run, locate one of the recessed knockouts in the firebrick floor (see Figure 12).
INSTALLATION Gas supply testing Continued If a sediment trap is not incorporated as a part of the gas utilization equipment, one shall be installed as close to the inlet of the equipment as practical at the time of installation, as per ANS Z223.1/NFPA 54. See Figure 14. Prepare incoming black iron gas line with Teflon tape or pipe joint compound (check with local codes as to the use of Teflon tape).
INSTALLATION Continued Note: A 120V supply connection to the leads to the receptacle must be provided for use with the optional blower kit whether installed during or after initial firebox installation. You may not be able to install a supply connection after the final installation is completed. Refer to Optional Blower Assembly Installation for specifics. Gas Connection Access Hole Electrical Connection Access Hole WARNING: Never touch the blower wheel while in operation.
INSTALLATION Receptacle Note: If any of the original wire must be replaced, it must be replaced with type TEW minimum 16GA copper wire rated at 105C ELECTRICAL RATING: 120v, 60Hz, 0.9A VARIABLE SPEED CONTROL BLOWER Blower Speed Control Shaft CONNECTORS (NOT SUPPLIED) GRN RECEPTACLE GRN BLK WHT GND WHT INCOMING 120V AC (FUSE BOX OR BREAKER) BLK FIELD WIRE Continued Figure 17 - Optional Blower Wiring Diagram Operating Optional Blower GA3500A Light your gas appliance with the blower off.
Operating Guidelines and Maintenance Instructions When lit for the first time, a vent-free log heater will emit a slight odor for about an hour or two. This is a normal occurrence which is due to the “curing” of the logs and the “burn-in” of internal paints and lubricants used in the manufacturing process. Keep control compartments, logs, burners and areas surrounding the logs clean by vacuuming or brushing at least twice a year.
Illustrated Parts Breakdown Model FBST 15 10** 4 15 15 16** 3 15 15 15 14 15 15 14 16** 15 15 15 4 6 15 15 1 6 15 6 5** 16** 15 14 6 16** 15 11** 16** 13 13 15 7-1 6 12 8** 16** 7-2 7-1 16** 2 16** 8** 9** 15 16** **These items are used on both sides of fireplace. 16 www.desatech.
PARTS LIST Model FBST This list contains replaceable parts used in your firebox. When ordering parts, follow the instructions listed under Replacement Parts on page 15 of this manual. KEY NO. PART NO.
Technical Service You may have further questions about installation, operation or troubleshooting. If so, contact DESA at 1-866-672-6040. You can also visit DESA Technical Service web site at www.desatech.com. Accessories Purchase these firebox accessories from your local dealer. If they can not supply these accessories, call DESA at 1-866-672-6040 for information. You can also write to the address listed on the back page of this manual.
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Warranty Information KEEP THIS WARRANTY Model Serial No. Date Purchased Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty. We make no other warranty, expressed or implied.
