Vanguard FBST User's Manual
Contents
1. SAFETY INFORMATION IMPORTANT Read this owner s manual carefully and completely beforetryingto assemble operate or service this firebox Improper use of this firebox can cause se rious injury or death from burns fire explosion electrical shock or carbon monoxide poisoning A CAUTION Carefully review the instructions supplied with the decorative type unvented room heater for the minimum firebox size requirement Do not install the appliance in this fire box unless this firebox meets the minimum dimensions required for the installation AX WARNING Any change to this firebox or its controls can be dangerous WARNING Donotuseablow er insert heat exchanger insert or other accessory not approved for use with this firebox Do notallow fans to blow directly into the firebox Avoid any drafts that alter burner flame patterns Ceiling fans can create drafts that alter burner flame patterns Altered burner patterns can cause sooting Firebox front and screen be comes very hot when running firebox Keep children and adults away from hot surfaces to avoid burns or clothing ignition Fire box will remain hot for a time after shutdown Allow surfaces to cool before touching Carefully supervise young chil dren when they are in the room with firebox You must operate this fireplace with the provided fireplace screen hood and brick liner in place Make sure2. 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 63 360 Btu Hr maximum the space can support 79 000 Btu Hr actual amount of Btu Hr used 6 www desatech com 105116 01D 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 See Ven tilation Air from Outdoors C Install a lower Btu Hr gas log heater if lower Btu Hr size makes room unconfined If the actual Btu Hr used is less than the maxi mum Btu Hr the space can support the space is an unconfined space You will need no additional fresh air ventilation AX WARNING If the area in which the firebox and gas log 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 ofthe methods described in the National Fuel Gas Code ANS Z223 1 NFPA 54 Section 5 3
3. Keep control compartments logs burners and areas surrounding the logs clean by vacuuming or brushing at least twice a year Temporary removal of the log set may ease the cleaning of the burner and pilot assembly In cleaning take care not to alter the settings on the pilot assembly See the operating instructions supplied with your vent free log heater for additional cleaning instructions AR WARNING Logs can be very hot Allow logs to cool before handling IMPORTANT Turn off the gas supply at the exter nal shutoff valve before servicing appliance Any safety screen or guard removed for servicing must be replaced prior to operating the appliance Installation and repair should be done by a quali fied person The appliance should be inspected before use and at least annually by a professional service person More frequent cleaning may be required due to excessive lint from carpeting pet hair etc It is imperative that the control compart ments burners and circulating air passageways of the appliance be kept clean AX WARNING Children and adults should be alerted to the hazards of high surface tempera tures and to stay away to avoid burns or clothing ignition Young children should be carefully supervised when they are in the same room as the appliance For lighting and operating this vent free firebox please refer to the vent free gas logs manufactur er s instruction manual REPLACEMENT PART
4. or applicable local codes VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining un confined space When ventilating to an adjoining unconfined space you must provide two perma nent openings one within 12 of the ceiling and one within 12 of the floor on the wall connecting the two spaces see option 1 Figure 3 You can also remove door into adjoining room see op tion 2 Figure 3 Follow the National Fuel Gas Code ANS Z223 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation for required size of ventilation grills or ducts AX WARNING Rework work sheet adding the space of the adjoining unconfined space The combined spaces must have enough fresh air to supply all appliances in both spaces S Pa Ventilation Grills et or Option 1 Remove pi Door into Adjoining Room Option O 2 BZ BB L ZZ GE GEA a enn Figure 3 Ventilation Air from Inside Building 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 ANS Z223 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation for required size o
5. to Combustibles A CAUTION Do not allow the vent free gas log heater to touch or extend beyond the firebox screen If your installation does not meet the above mini mum clearances in Figure 7 you must e raise the mantel to an acceptable height OR e remove the mantel Wall board or facing material above firebox may be of combustible material including decorative mantel ornaments or other similar projections _Off of the facing material N Top Frame N Combustible Material X TT Combustible 12 15 18 Material 1 1 Max Thickness q Note Do not 7 Min cover louver openings Note All vertical Wire mes measurements are from top of fireplace Sereen Supplied hood to bottom of Sj Firebox Hoods mantel shelf These BS Must Be Used Minimum clearances S SO at All Times eplace any other Y recommended clearances supplied with your ANS Z21 11 2 approved gas logs 4411 4 Min from the Perpendicular Side Wall to the Edge of Facial Figure 6 Minimum Clearance Top View Mantel Clearances for Built In Installation If placing custom mantel above built in firebox you must meet the minimum allowable clearance between mantel shelf and top of firebox opening shown in Figure 7 These are the minimum allowable mantel cl
6. high traffic areas e in windy or drafty areas A CAUTION Log heaters installed in this firebox create warm air currents These cur rents move heat to wall surfaces next to firebox Installing fire box next to vinyl or cloth wall coverings or operating firebox 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 gas log heaters add moisture to the air Although this is beneficial installing firebox in rooms without enough ventilation air may cause mildew to form from too much moisture See Air for Combustion and Ventilation page 5 IMPORTANT Make sure the firebox is level If firebox is not level log set will not work properly Note Your Vanguard firebox is designed to be used in zero clearance installations Wall or fram ing material can be placed against any exterior surface on the rear sides or top of your firebox except where standoff spacers are integrally at tached If standoff spacers are attached to your firebox these spacers can be placed directly against wall or framing materials Use dimensions shown for rough openings to create the easiest installation see Built In Firebox Installation page 9 INSTALLATION CLEARANCES A WARNING Maintain the minimum clearances If you can provide greater clearances from floor ceiling and adjoining wa
7. the firebox front facing A WARNING Do not allow any combustible materials to over lap the firebox front facing see Figure 9 IMPORTANT Noncombustible materials such as brick tile etc may overlap the front facing but should never cover any necessary openings like louvered slots A WARNING Never modify or cover the louvered slots on the front of the firebox WARNING Use only noncom bustible mortar or adhesives when overlapping the front facing with noncombustible facing material Nails or Wood Screws a not overlap more than Edge Nailing Flange 3 8 onto black metal of side front face Drywall firebox 3 8 Max SAFE yn _ ZONE x 11 Max Minimum from firebox 4 __ edge to combustible material 8 Min from adjacent wall to fireplace opening f Figure 9 Framing for Built In Firebox Installation Top View AS Figure 10 Attaching Firebox to Wall Studs www desatech com 105116 01D INSTALLATION Continued INSTALLING GAS LINE A WARNING A qualified ser vice 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 deter mined how the gas line will run lo
8. ENTS FROM THE DATE OF FIRST PURCHASE AND DESA S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA HEATING PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT INCI DENTAL OR CONSEQUENTIAL DAMAGES Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential damages so the above limitation on implied warranties or exclusion or limitation on damages may not apply to you This warranty gives you specific legal rights and you may also have other rights that vary from state to state For information about this warranty write oO SS A 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 www desatech com 10511601 105116 01 Rev D NOT A UPC 10 05
9. S Note Use only original replacement parts This will protect your warranty coverage for parts replaced under warranty PARTS UNDER WARRANTY Contact authorized dealers of this product If they can t supply original replacement part s call DESA at 1 866 672 6040 When calling DESA have ready e your name e your address model and serial numbers of your firebox e how firebox was malfunctioning e type of gas used propane LP or natural gas e purchase date Usually we will ask you to return the defective part to the factory PARTS NOT UNDER WARRANTY Contact authorized dealers of this product If they can t supply original replacement part s call DESA at 1 866 672 6040 for referral infor mation When calling DESA have ready e model number of your firebox e the replacement part number Note The firebox identification label including model number serial number clearances etc is located above the brick liner and under the heat shield See Figure 20 Air Deflector Identification Label Heat Shield RR HO gt Brick Liner Figure 20 Location of Firebox Identification Label 105116 01D www desatech com 15 ILLUSTRATED PARTS BREAKDOWN MODEL FBST A a These items are used on both sides of fireplace 16 www desatech com 105116 01D PARTS LIST MODEL FBST This list contains replaceable p
10. VANGUARD UNVENTED VENT FREE LogMate UNIVERSAL FIREBOX OWNER S OPERATION AND INSTALLATION MANUAL serviced by professionals who We recommend that our a products be installed and are certified in the U S by NFI a a A www nficertified org 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 Do not touch any electrical switch Do not use any phone in your building Immediately call your gas supplierfrom aneighbor 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 altera tion service or maintenance can cause injury or prop erty damage Refer to this manual for correct installation and operational procedures For assistance or addi tional information consult a qualified installer service agency or the gas supplier WARNING For use only w
11. arts used in your firebox When ordering parts follow the instructions listed under Replacement Parts on page 15 of this manual KEY NO PARTNO DESCRIPTION _ QTY 1 Firebox Assembly 2 2 i ae Firebox Bottom 1 3 Bigs Firebox Top 1 4 23982 Top Spacer 4 5 26731 Deflector Hood 2 6 26740 Nailing Flange 8 7 1 02013 Side Refractory Brick Liner 2 7 2 02014 Bottom Refractory Brick Liner 2 8 24007 Side Refractory Retainer 4 9 ZS Screen 4 10 26752 Extruded Louver 2 11 26733 Lower Door Panel 2 12 14200 Receptacle 1 13 21171 Access Hole Cover 6 14 099230 01 Shoulder Screws 14 15 11164 Screw 10 x 1 2 zinc PH 24 16 11165 Screw 10 x 5 8 zinc PH 46 PARTS AVAILABLE NOT SHOWN memm 55473 Installation Instructions ql 26544 Rating Plate Label 7 4 Not a field replaceable part 105116 01D www desatech com 17 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 Ifthey 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 BLOWER GA3500A An optional blower is available for use with the FBST fireboxes for bidirectional heat circula tion and may be installed during or a
12. cate one of the recessed knockouts in the firebrick floor see Figure 12 Firmly tap the center of the knockout with a chisel until it is released Carefully chisel the rough edges of the hole you have made to smooth edges This hole will line up with the hole in the metal floor A CAUTION Do not use exces sive force to remove the knock out Too much force may damage the firebrick concrete insert Gas Line Installed Through Access Hole on One Side of Firebox Manual Shutoff Valve is Located Under Firebox Floor on Either Side gt Alternative Gas Line Location Figure 11 Installing Gas Line and Manual Shutoff Valve A manual shutoff valve CSA certified and com plying with the National Fuel Gas code ANS Z223 1 NFPA 54 must be included within 6 six feet of the vent free firebox gas supply system It may be convenient to install the gas shutoff outside the vent free firebox enclosure where it can be accessed with a key through a wall as shown in Figure 13 Depending on the type of installation some local codes may require you to install two 2 manual shutoff valves independently accessible from both rooms Check your local codes for ap plicable installation requirements A 36 long 1 2 NPT SCHD 40 flexible gas con nector line complying with the National Fuel Gas code ANS Z223 1 NFPA 54 may be run from the regulator to the incoming 1 2 NPT black iron gas line You may also rout
13. ctions must be tested for leaks after the installation is completed After ensuring that the manual shutoff gas valve is open apply a soap and water solution to all connections and joints If bubbles appear leaks can be detected and corrected DO NOT USE OPEN FLAME FOR LEAK TESTING AND DO NOT OPERATE ANY APPLIANCE IF A LEAK IS DETECTED Incoming 1 2 Gas Line Permitted by Local Codes Sediment Trap Not Supplied Figure 14 Sediment Trap Installation GAS SUPPLY TESTING Note This section is intended as a guide for qualified technicians installing gas to this vent free firebox Ay CAUTION Do not connect vent free heater before pressure testing gas piping Damage to gas valve may result and an un safe condition may be caused The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1 2 psig 3 5 kPa The appliance must be isolated from the gas supply piping system by closing manual shutoff valve during any pressure testing of the gas sup ply piping system at test pressures equal to or less than 1 2 psig 3 5 kPa HARD WIRING FIREBOX Model FBST can be hard wired to the duplex outlet located inside the firebox bottom if desired This allows the blower accessory to be plugged into the duplex outlet NOTICE A qualified electrician mustconnectelectrical wiring to du
14. e the incoming 1 2 NPT black iron gas line directly to the appliance regulator The incoming gas line may be routed into the vent free firebox either from the left or right hand sides see Figure 11 Remove the gas line cover plate from the vent free firebox s outer surround at the location to be used Firebrick Floor Knockouts 3 4 Thick Liner Remove This Area Figure 12 Location of Knockouts for Gas Line Shut Off Valve Extension Figure 13 Typical Exterior Wall Gas Shut Off Installation 105116 01D www desatech com 11 INSTALLATION 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 Compounds used on threaded joints of gas piping shall be resistant to the action of propane LP and should be applied lightly to ensure excess sealant does not enter the gas line Complete your gas installation by connecting the incoming gas line to the appliance regulator Secure all joints tightly with wrench but do not overtighten If a flexible gas line is used take care not to kink the connector Ay WARNING All gas piping and conne
15. earances for a safe installation Use larger clearances wherever possible to minimize the heating of objects and materials placed on the mantel Figure 7 Minimum Mantel Clearances for Built In Installation BUILT IN FIREBOX INSTALLATION Built in installation of this firebox involves installing firebox into a framed in enclosure This makes the front of firebox flush with wall Optional perimeter brass trim accessories are available see Accessories page 18 The brass trim will extend past sides of firebox approximately 1 2 This will cover the rough edges of the wall opening If installing a mantel above the firebox you must follow the clearances shown in Figure 7 Follow the instructions below to install the firebox in this manner 1 Frame in rough opening The firebox framing should be constructed of 2 x 4 lumber or heavier Construct framing using dimensions shown in Figure 8 and 9 page 10 It is recommended that the framing be constructed first and the unit be placed in position by removing the nailing flanges from one side After sliding the unit into place the outer most flanges may be replaced and nailed to the framing on all sides before applying the wallboard to the exterior framing 105116 01D www desatech com 9 INSTALLATION Continued 2 Ifthe 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 mu
16. eted or sealed and b weather stripping has been added on open able 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 elec trical 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 7 If your home does not meet all of the three cri teria above proceed to Determining Fresh Air Flow for Firebox Location Confined and Unconfined Space The National Fuel Gas Code ANS Z223 1 NF PA 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 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 m per kw of the aggregate input rating of all appliances installed in that space Rooms com municating directly with the space in which the appliances are installed through openings not furnished with doors are considered a part of the unconfined space This heater shall not be installed in a confined space or unusually tight construction unless provi sions are provided for adequate combustion and ventilation air Adjoining rooms are communicating only if there are d
17. f 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 Ee Ventilated Attic Outlet Air A c Outlet AY To Attic To Crawl Space Inlet Air i Ventilated net Crawl Space Figure 4 Ventilation Air from Outdoors 105116 01D www desatech com T INSTALLATION NOTICE This firebox in com bination 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 circulat ing 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 Ay WARNING A qualified ser vice person must install firebox Follow all local codes Ad WARNING Never install the firebox e ina bedroom or bathroom e in a recreational vehicle e where curtains furniture clothing or other flammable objects are less than 42 from the front top or sides of the firebox e in
18. fter firebox installation BRASS TRIM GA6093 Easily clips around firebox to provide a finished appearance covering rough and or unfinished mantel edges Note Kit is for one side of firebox only Two kits are required to do both sides of fireplace gt POLISHED BRASS HOOD GA6054 Replaces the standard black hood to provide a more formal appearance Note Kitis for one side of firebox only Two kits are required to do both sides of fireplace POLISHED BRASS LOUVER GBL41 Replaces the standard black louver to provide a more formal appearance Note Kitis for one side of firebox only Two kits are required to do both sides of fireplace 18 www desatech com 105116 01D NOTES 105116 01D www desatech com 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 LIMITED WARRANTY VENT FREE FIREBOX DESA warrants this product to be free from defects in materials and components for four 4 years from the date of first purchase provided that the product has been properly installed operated and main
19. g vent free logs in a firebox above eleva tions of 4 500 feet could cause pilot outage 105116 01D www desatech com 3 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 lat est edition of The National Fuel Gas Code ANS Z223 1 NFPA 54 Firebox must be electrically grounded in accordance with the National Electri cal Code ANS NFPA70 latest edition Available from American National Standards Institute Inc 1430 Broadway New York NY 10018 National Fire Protection Association Inc Batterymarch Park Quincy MA 02269 UNPACKING 1 Remove all protective packaging from inside firebox Carefully lift the firebox off the bot tom corrugated tray 2 Carton should contain 2 deflective hoods and hardware packet in addition to firebox assembly If items are missing inform dealer where you bought firebox 3 Check all items for any shipping damage If damaged promptly inform dealer where you bought firebox BLOWER ACCESSORY The FBST firebox will accept the GA3500A ac cessory The variable blower allows you to select the fan speed you desire The blower circulates heated air from the firebox into the room Use of blower is o
20. ich allows you to select the blower speed you desire Note Periodically check the louvers of the firebox and remove any dust dirt or obstructions Receptacle Hook and Loop Control Lock a Knob Nut Mounting Strips Figure 18 Installing Optional Blower GA3500A HEAT DEFLECTIVE HOOD INSTALLATION The factory supplied heat deflective hoods must be installed inside the fireplace opening on both sides for the safe operation of the unit as shown in Figure 19 1 Remove protective covering from hoods 2 Position deflective hood into opening on one side of the firebox and secure to the top of the opening using screws provided 3 Secure the ends of the hood to the firebox using two screws provided for each side 4 Repeat steps 2 and 3 to install hood on the opposite side of the firebox caurion Do not clean hood with abrasive cleanser Use only regular household cleaners and a smooth cloth Front Hood Typical Each Side Corner Post 3 Screws 2 Screws Each Top End of Hood Figure 19 Typical Hood Installation Both Sides 14 www desatech com 105116 01D 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
21. in step 2 8 While supporting speed control housing se cure shaft in panel hole with lock nut Place control knob on shaft Plug blower power cord into receptacle lo cated in lower firebox compartment Check to make sure there are no foreign objects in blower wheel AX WARNING Never touch the blower wheel while in operation 10 Turn blower on and check for proper operation 11 Turn blower off before continuing 12 Replace lower door panel by inserting tabs on bottom of panel into locating slots on firebox Push door panel into an upright position and secure with screws removed in step 2 Locating Slot Door Panel Locating Slot Figure 16 Removing Lower Door Panel 105116 01D www desatech com 13 INSTALLATION Continued INCOMING 120V AC FUSE BOX OR BREAKER CONNECTORS NOT SUPPLIED FIELD WIRE GND oO ire ij ow oO 2 lt T 40 E n e o 9 28 3 L ES Ee x ulz lt 6 3 m ee er os a O oN 05 qr 22 og ge Ys oo ES a E go 20 ai D ax ZE J w a 300 zS Du g Sib 2 raz lt no Pt gt 0 SF Vo co Ze SS 23 Bo 0 O gS oo 2e Figure 17 Optional Blower Wiring Diagram Operating Optional Blower GA3500A Light your gas appliance with the blower off After about 10 minutes turn the blower on to deliver heated air out the top louvers The blower features a variable control wh
22. ith 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 This firebox may be installed in an aftermarket perma nently located manufactured mobile home where not prohibited by state or local codes Aftermarket Completion of sale not for purpose of resale from the manufacturer State of Massachusetts The installation must be made by a licensed plumber or gas fitter in the Commonwealth of Massachusetts Sellers 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 Common wealth of Massachusetts TABLE OF CONTENTS Safety Imformation 2 c c5sccdsedeccecesseescccessasseseecseese 3 Operating Guidelines and Product Specifications imecinads 4 Maintenance Instructions ccceeeeeees 15 LOCA CodeS reren seed apin a 4 Replacement Parts oooocconccccccccccconcccncccnonccancnnno 15 Unpackidd ccoiiiacaioc iii 4 Illustrated Parts Breakdown and Parts List 16 e A ann 4 Technical SOVICO siose eaei 1 Locating Firebox ssrt ririri i 5 Accessories Air for combustion and Ventilation 5 Warranty Information ISTO ALIN corrio 8 2 www desatech com 105116 01D
23. ll Carefully follow the instructions below This will ensure safe installation Minimum Wall and Ceiling Clearances A Clearances from the side of the firebox open ing to any combustible wall should not be less than 8 B Clearances from the top of the firebox opening to the ceiling should not be less than 42 C When the firebox is installed on carpeting or other combustible material other than wood flooring the firebox should be installed on a metal or wood panel extending the full width and depth of the enclosure D Clearances from the bottom of firebox to the floor is 0 A CAUTION Do not install the firebox directly on carpet or vinyl Acaution Use only the clear ances specified in this manual or on the firebox rating plate www desatech com 105116 01D INSTALLATION Continued Minimum clearances to combustibles are e Sides of outer casing 0 min Drywall to sides and top of 0 min front face e Ceiling to opening 42 min e Floor see Minimum Wall 0 min and Ceiling Clearances note C e Perpendicular walls 4 min Right and Left e Distance to Facing Walls 36 min See Figures 5 and 6 l X 0 Min Clearance to Ceilin g Upper Frame Wallboard 42 Min 8 Min lt 0 to Wood Floor 1 T T Figure 5 Minimum Clearance Front View 1 2 Min Clearance
24. oorless passageways or ventilation grills between them DETERMINING FRESH AIR FLOW FOR FIREBOX 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 volume of space Example Space size 22 ft length x 18 ft width x 8 ft ceiling height 3168 cu ft volume of space cu ft 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 3168 cu ft volume of space x 20 63 360 maximum Btu Hr the space can support 3 Add the Btu Hr of all fuel burning appliances in the space Gas water heater Btu Hr Gas furnace Btu Hr Vented gas heater Btu Hr Gas fireplace logs Btu Hr Other gas appliances Btu Hr Total Btu Hr 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 40 000 Btu Hr Gas firebox logs 39 000 Btu Hr Total __79 000__Btu Hr
25. plex outlet for built in instal lation Follow all local codes In absence of local codes fol low The National Electric Code ANS NFPA 70 ELECTRICAL INSTALLATION A model GA3500A blower system assembly is available for use with the FBST vent free firebox as an optional accessory This blower is designed to be installed on either side of the FBST firebox when provisions for a 120 VAC supply connection are made at either end of the cabinet Use of a blower system other than those manufactured by DESA voids the warranty Electrical connections are made within the recep tacle with wires that are routed through the bushing provided see Figure 15 page 13 The receptacle may be relocated to either side when necessary However the cover plate must be replaced over the unused access point Be certain to properly ground the vent free firebox using the green grounding wire see Figure 17 on page 14 12 www desatech com 105116 01D 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 l dl D UA j Electrical 4 Connection Cover Access Hole Plates Figure 15 Locating Elect
26. ptional BRICK LINER This firebox features a concrete brick liner As with all concrete liners this liner may develop slight cracks when exposed to heat These cracks will not affect the performance of the firebox or vent free gas logs PRODUCT SPECIFICATIONS 1 14 i Y E sil lt 1 2 5 8 f 1 x 4 Ue Qu NOTICE The firebox identifica tion label including model num ber serial number clearances etc is located directly above the brick liner and under the heat shield See Figure 20 page 15 PRODUCT FEATURES OPERATION This firebox is designed for use with approved ANS Z21 11 2 decorative type unvented room heaters Physical size limitations apply Refer to minimum firebox requirements supplied with log heater It requires no outside venting or chimney making in stallation easy and inexpensive When used without the blower the firebox requires no electricity mak ing it ideal for emergency backup heat sh t i 21h p 12 Figure 1 Dual Sided Firebox 4 www desatech com 105116 01D LOCATING FIREBOX PLANNING Plan where you will install the firebox This will save time and money later when you install the fire box Before installation consider the following 1 Where the firebox will be located Allow for
27. rical Connection and Gas Connection on Either Side of Fireplace OPTIONAL BLOWER ASSEMBLY INSTALLATION Proper installation of the blower system is required to insure that the maximum discharge of air can be delivered through the louvers on each side of the fireplace Note You may perform this installation from either side of the fireplace within either room The lower door panels are removable from both sides of the firebox for better access 1 Remove the blower assembly from the pack aging and inspect the fan and wiring for dam age If any wiring is loose or damaged return the assembly for exchange to your dealer or distributor 2 Remove the 2 screws located at the top of the lower door panel Slide door panel forward and up to remove tabs on panel from locating slots in firebox see Figure 16 3 Locate the two strips of hook and loop mounting strips on one side of the base of the lower com partment Align the mounting strips on blower with mounting strips on base of firebox 4 Install blower housing with exhaust outlet ports directed upwards along inner side wall of lower compartment The blower outlets must be installed flush to the outer cabinet for air to flow properly 5 Apply gentle force between hook and loop mounting strips to seat blower 6 Remove control knob and lock nut from blower speed control shaft 7 Place speed control shaft through 3 8 hole provided in right side of lower door panel removed
28. st be installed upon a metal or wood panel extending the full width and depth of the vent free firebox 3 Ifaraised platform is to be constructed ceiling clearances must be maintained 4 Install gas piping to firebox location See In stalling Gas Line on page 11 and Connecting to Gas Supply in log set owner s manual IMPORTANT If installing blower accessory See Hard Wiring Firebox page 12 5 Carefully set firebox in front of rough open ing IMPORTANT If installing brass trim kit see instructions included with brass trim accessory You must install shoulder screws from brass trim kit now 6 Carefully insert firebox into rough opening SL Wallboard A Note Gas line may also be o opposite side Gas Line Wallboard Facing Wall V Base line 40 14 Min 36 Min to 5x y Pa Facing Wall i Figure 8 Framing for Built In Firebox Installation Combustible material must 7 Attach firebox to wall studs using nails or wood screws through holes in nailing flange see Figure 10 8 Ifusing optional brass trim kit install the trim after final finishing and or painting of wall See instructions included with brass trim ac cessory for attaching brass trim IMPORTANT When finishing your firebox combustible materials such as wall board gypsum board sheet rock drywall plywood etc may be butted up next to the sides and top of the firebox Combustible materials should never overlap
29. tained in accordance with all applicable instructions To make a claim under this warranty the Bill of Sale or cancelled check must be presented This warranty is extended only to the original retail purchaser This warranty covers the cost of part s required to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Authorized Service Center Warranty part s MUST be obtained through authorized dealers of this product and or DESA who will provide original factory replacement parts Failure to use original factory replacement parts voids this war ranty The heater MUST be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts that fail or become damaged as a result of misuse accidents lack of proper maintenance or defects caused by improper installation Travel diagnostic cost labor transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO FOUR 4 YEARS ON ALL COMPON
30. these parts are in place and screens are closed before running firebox The supplied hoods may not be replaced with hoods which may be provided with a log heater Keep the appliance area clear and free from combustible ma terials gasoline and other flam mable vapors and liquids This firebox shall not be installed in a bedroom or bathroom Never install the firebox e in a recreational vehicle e where curtains furniture clothing or other flammable objects are less than 42 from the front top or sides of the firebox e in high traffic areas e in windy or drafty areas Do not use this firebox as a wood burning fireplace Use only decorative unvented room heaters log sets Do not add extra logs or ornaments such as pine cones vermiculite or rock wool Using these added items can cause sooting Use only the provided hoods or appropriate polished brass hood accessories See Acces sories on page 18 Vent free gas log heaters installed in this firebox require fresh air ventilation to run properly See Air for Combustion and Ventilation page 5 Do not run firebox e where flammable liquids or vapors are used or stored e under dusty conditions Do not use this firebox to cook food or burn paper or other objects Never place any objects in firebox or on logs 10 Turn firebox off and let cool before servicing 1 Only a qualified service person should service and repair firebox 1 Operatin
31. wall and ceiling clearances see Installation Clearances page 8 Everything needed to complete installation 3 These models CANNOT be installed in a bedroom or bathroom Proper air for combustion and ventilation 5 Consider a location where heat output would not be affected by drafts air condition ducts windows or doors 6 Alocation that minimizes modifications on ex isting framing will make installation easier Projected installations can extend any dis tance into the room A projection may be ideal as a partition between two otherwise common areas when added to an existing finished wall see Figure 2 Internal wall installation provides a discreet viewing option between two adjacent rooms or within an added wall to subdivide an oversize room Figure 2 Projected Installation AIR FOR COMBUSTION AND VENTILATION WARNING This firebox shall not be installed in a confined space or unusually tight con struction unless provisions are provided for adequate combus tion and ventilation air Read the following instructions to insure proper fresh air for this and other fuel burning appliances in your home Today s 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
32. 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 fireboxes 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 ANS 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 5 through 7 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 105116 01D www desatech com 5 AIR FOR COMBUSTION AND VENTILATION Continued Unusually tight construction is defined as con struction 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 kg per pa sec m or less with openings gask
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