UNVENTED (VENT-FREE) NATURAL GAS FIREPLACE OWNER’S OPERATION AND INSTALLATION MANUAL Shown with optional cabinet mantel and hearth base accessories. 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.
CONTENTS SECTION PAGE Safety Information ................................................................................... 2 Product Identification .............................................................................. 4 Local Codes ............................................................................................. 5 Unpacking................................................................................................ 5 Product Features .............................................
SAFETY INFORMATION Continued 101742 WARNING ICON G 001 WARNINGS Continued WARNING: Any change to this fireplace or its controls can be dangerous. 1. Use only natural gas. Do not convert fireplace to use different fuel type. 2. 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.
PRODUCT IDENTIFICATION Crossover Log (#3) Front Log (#2) Rear Log (#1) Front Burner Rear Burner Left Front Branch (#4) Gas Valve Bracket Base Right Front Branch (#5) Gas Regulator Piezo Ignitor Gas Valve Assembly Control Knob Figure 1 - Log Base Assembly Top Outer Casing Louver Hood Firebox Support Rear Access Door Screen Assembly Side Access Door Bottom Louver Assembly Figure 2 - Fireplace 4 101742
LOCAL CODES Install and use fireplace with care. Follow all local codes. In the absence of local codes, use the latest edition of The National Fuel Gas Code ANSI Z223, also known as 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 UNPACKING PRODUCT FEATURES 1. Remove trim kit and cartons containing logs from carton.
AIR FOR COMBUSTION AND VENTILATION WARNING ICON G 001 WARNING This fireplace must have fresh air for proper operation. If not, poor fuel combustion could result. 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.
AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING 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.
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 3). Follow the National Fuel Gas Code NFPA 54/ANSI Z223.1, Section 5.
INSTALLING NOTICE A qualified service person must install fireplace. Follow all local codes. WARNING ICON G 001 WARNING Never install the fireplace • in a bedroom or bathroom • in a recreational vehicle • where curtains, furniture, clothing, or other flammable objects are less than 36 inches from the front, top, or sides of the fireplace • in high traffic areas • in windy or drafty areas WARNING ICON G 001 CAUTION This fireplace creates warm air currents.
INSTALLING Continued ASSEMBLING AND ATTACHING BRASS TRIM Note: The instructions below show assembling and attaching brass trim to fireplace. You cannot attach the brass trim as described below for built-in installation (see page 13). 1. Remove packaging from three pieces of brass trim. 2. Locate four brass screws, two adjusting plates with set screws, and two shims in the hardware packet. 3. Align shim under adjusting plate as shown in Figure 5. 4.
INSTALLING INSTALLATION CLEARANCES Continued WARNING ICON G 001 WARNING Maintain the minimum clearances. If you can, provide greater clearances from floor, ceiling, and adjoining wall. Carefully follow the instructions below. This will ensure safe installation. Minimum Wall and Ceiling Clearances (see Figure 7) A. Clearances from the side of the fireplace opening to any combustible wall should not be less than 16 inches. B.
INSTALLING Continued 2. Install gas piping to fireplace location. This installation includes an approved flexible gas line (if allowed by local codes) after the manual shutoff valve. The flexible gas line must be the last item installed on the gas piping. See Installing Gas Piping to Fireplace Location, page 16. 3. Place hearth base accessory against wall at installation location. Cut an access hole in hearth top to run flexible gas line to fireplace (see Figure 8).
INSTALLING Continued 8. Carefully insert fireplace into cabinet mantel. Be careful not to scratch or damage hearth base, cabinet mantel, or any laminate trim on hearth base. Remove protective material from top of hearth base and from front of fireplace (if any). Note: You can secure fireplace to hearth or floor. Open lower louver. Locate screw holes in bottom of base. Tighten wood screws through these holes and into hearth or floor. 9. Check all gas connections for leaks.
INSTALLING If installing in a corner, use dimensions shown in Figure 12 for the rough opening. The height is 33" which is the same as the wall opening on page 13. Continued 39 3/8" 27 7/8" 35 1/2" 55 5/8" Figure 12 - Rough Opening for Installing in Corner 2. Install gas piping to fireplace location. This installation includes an approved flexible gas line (if allowed by local codes) after the manual shutoff valve. The flexible gas line must be the last item installed on the gas piping.
INSTALLING Continued 6. Carefully insert fireplace into rough opening. 7. Attach fireplace to wall studs using nails or wood screws through holes in nailing flange (see Figure 14). 9. Check all gas connections for leaks. See Checking Gas Connections, page 18. Figure 14 - Attaching Nailing Flange Accessory Mantel Clearances for Built-In Installation If placing mantel above built-in fireplace, you must meet minimum clearance between mantel shelf and top of fireplace opening.
INSTALLING INSTALLING GAS PIPING TO FIREPLACE LOCATION NOTICE Continued A qualified service person must connect fireplace to gas supply. Follow all local codes. Installation Items Needed Before installing fireplace, make sure you have the items listed below.
A.G.A. Design-Certified Manual Shutoff Valve With 1/8" NPT Tap* INSTALLING Continued Approved Flexible Gas Line 3" Minimum From Gas Meter (5" W.C. to 10.5" W.C. Pressure) Tee Joint Sediment Trap Pipe Nipple Figure 16 - Gas Connection Cap * Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories, page 31.
INSTALLING 4. Route flexible gas line from manual shutoff valve into fireplace through side or rear access panel. Route flexible gas supply line through fireplace access door. Continued NOTICE Most building codes do not permit concealed gas connections. A flexible gas line is provided to allow accessibility from the fireplace. The flexible gas supply line connection to the manual shutoff valve should be accessible. 5.
INSTALLING Continued Test Pressures Equal To or Less Than 1/2 PSIG 1. Close manual shutoff valve (see Figure 19). 2. Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter. 3. Check all joints from gas meter to manual shutoff valve (see Figure 20). Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak. 4. Correct all leaks at once. Pressure Testing Fireplace Gas Connections 1.
INSTALLING INSTALLING LOGS Continued WARNING ICON G 001 WARNING Do not add extra logs or ornaments such as pine cones, vermiculite, or rock wool. Using these added items can cause sooting. Do not add lava rock around base. Rock and debris could fall into the control area of fireplace. Each log is marked with a number. These numbers will help you identify the log when installing. It is very important to install these logs exactly as instructed. Do not modify logs. Only use logs supplied with fireplace.
INSTALLING Continued 3. Place crossover log (#3) into place (see Figure 23). Be sure to place back of crossover log into notch on left side of rear log. The indentation under front left fork of crossover log must rest on rectangular knob of front log. Crossover Log (#3) Figure 23 - Installing Crossover Log 4. Place left front branch (#4) and right front branch (#5) into place (see Figure 24). Make sure notches on bottom rest on grates.
INSTALLING WARNING ICON Continued G 001 WARNING You must operate this fireplace with the fireplace screen in place. Make sure fireplace screen is in place before running fireplace. 5. Install fireplace screen by slipping notches of fireplace screen over screws on front of fireplace (see Figure 25).
OPERATING FIREPLACE Continued LIGHTING INSTRUCTIONS WARNING ICON G 001 WARNING You must operate this fireplace with the fireplace screen in place. Make sure fireplace screen is installed before running fireplace. NOTICE During initial operation of new fireplace, burning logs will give off a paper-burning smell. Orange flame will also be present. Open window to vent smell. Operate fireplace on HI position to burn off odor. This will only last a few hours. 1. STOP! Read the safety information on page 22.
OPERATING FIREPLACE 8. Turn control knob counterclockwise C-clockwise to desired heating level. The burners should light. Set control knob to any heat level between HI and LO. Continued WARNING ICON G 001 CAUTION Do not try to adjust heating levels by using the manual shutoff valve. TO TURN OFF GAS TO APPLIANCE Shutting Off Fireplace Turn control knob clockwise Clockwise to the OFF position. Shutting Off Burners Only (pilot stays lit) Turn control knob clockwise Clockwise to the PILOT position.
INSPECTING BURNERS Check pilot flame pattern and burner flame patterns often. PILOT FLAME PATTERN Figure 28 shows a correct pilot flame pattern. Figure 29 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the fireplace will shut down.
CLEANING AND MAINTENANCE WARNING ICON G 001 WARNING Turn off fireplace and let cool before cleaning. WARNING ICON CAUTION G 001 You must keep control areas, burners, and circulating air passageways of fireplace clean. Inspect these areas of fireplace before each use. Have fireplace inspected yearly by a qualified service person. Fireplace may need more frequent cleaning due to excessive lint from carpeting, bedding material, etc.
TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE When ignitor button is pressed, there is spark at ODS/pilot but no ignition 1. Gas supply turned off or manual shutoff valve closed 2. Control knob not in PILOT position 3. Control knob not pressed in while in PILOT position 4. Air in gas lines when installed 5. ODS/pilot is clogged 6. Gas regulator setting is not correct ODS/pilot lights but flame goes out when control knob is released 1. Control knob not fully pressed in 2.
TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE One or both burners do not light after ODS/pilot is lit 1. Burner orifice(s) clogged 2. Burner orifice(s) diameter is too small 3. Inlet gas pressure is too low 4. Mislocated crossover tube Delayed ignition of one or both burners 1. Manifold pressure is too low 2. Burner orifice(s) clogged 3. Mislocated crossover tube Burner backfiring during combustion 1. Burner orifice is clogged or damaged 2. Damaged burner 3.
TROUBLESHOOTING Continued WARNING ICON G 001 WARNING If you smell gas • Shut off gas supply. • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the fire department. IMPORTANT: Operating fireplace where impurities in air exist may create odors.
TECHNICAL SERVICE SERVICE HINTS You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-DESA LOG (1-800-337-2564).
ACCESSORIES Purchase these fireplace accessories from your local dealer. If they can not supply these accessories, call DESA International’s Sales Department at 1-800-432-2382 for information. You can also write to the address listed on the back page of this manual. CABINET MANTEL GMC11F - Walnut Finished GMC12U - Unfinished Shown with optional base accessory.
ILLUSTRATED PARTS BREAKDOWN 3 Log Base Assembly 1 2 4 5 7 7-1 7-2 27 19 8 13 9 10 6 8 12 11 8 16 26 6 14 6 6 20 6 18 29 19 28 15 24 7-2 13 17 23 25 21 22 32 101742
PARTS LIST Log Base Assembly KEY NO. 1 2 3 4 5 6 7 7-1 7-2 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 30 of this manual.
ILLUSTRATED PARTS BREAKDOWN Fireplace 7 1 6 2 15 4 3 16 13 13 16 8 16 16 13 14 5 19 6 18 17 16 16 10 9 11 16 12 34 101742
PARTS LIST Fireplace This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 30 of this manual. KEY NO.
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.
