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Desa CFS24NVC VS30N User's Manual

1. A CAUTION You must keep control areas burners and cir culating air passageways of heater clean Inspect these areas of heater before each use Have heater inspected yearly by a quali fied service person Heater may need more frequent cleaning due to excessive lint from carpeting pet hair bedding material etc CLEANING BURNER INJECTOR HOLDER AND PILOT AIR INLET HOLE The primary air inlet holes allow the proper amount of air to mix with the gas This provides a clean burning flame Keep these holes clear of dust dirt and lint Clean these air inlet holes prior to each heating season Blocked air holes will create soot We rec ommend that you clean the unit every 2 500 hours of operation or every three months We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt To clean these parts we recom mend using compressed air no greater than 30 PSI Your local computer store hard ware store or home center may carry com pressed air in a can You can use a vacuum cleaner in the blow position If using com pressed air in a can please follow the direc tions on the can If you don t follow direc tions on the can you could damage the pilot assembly 1 Shut off the unit including the pilot Allow the unit to cool for at least thirty minutes 2 Inspect burner pilot and primary air inlet holes on injector holder for dust and dirt see Figure 28 3 Blow a
2. A CAUTION Do not pick up heater base assembly by burners This could damage heater Only handle base assembly by grates IMPORTANT Make sure the heater burn ers are level If heater is not level heater will not work properly For thermostat models avoid damage to thermostat bulb Avoid nicks or sharp bends in thermostat bulb wire Keep thermostat bulb in mounting bracket Damper Damper__ Clamp Damper Manufactured Fireplace Installation Items Needed hardware package provided with heater approved flexible gas hose not provided Gf allowed by local codes sealant resistant to LP gas not provided electric drill with 3 16 masonry drill bit 1 Apply pipe joint sealant lightly to male threads of gas fitting not provided Connect approved flexible gas hose to gas regulator of heater see Figure 11 page 11 IMPORTANT Hold gas regulator with wrench when connecting flexible gas hose 2 Locate mounting brackets bolts and nuts in hardware package Attach mounting brackets to heater base see Figure 12 page 11 Attach nuts finger tight 3 Position heater base assembly in fire place 4 Mark screw locations through holes in mounting brackets If installing in a brick bottom fireplace mark screw lo cations in mortar joint of bricks 5 Remove heater base from fireplace Remove mounting brackets from heater base 6 Drill holes at marked locations using 3 16 drill bit
3. 7 Attach mounting brackets to fireplace floor using masonry screws in hard ware package 104414 INSTALLATION Continued 8 Reattach heater base to mounting brackets Tighten nuts firmly 9 Connect to gas supply See Connect ing To Gas Supply Heater Gas Regulator Flexible Gas Hose if allowed by local codes Figure 11 Attaching Flexible Gas Hose to Heater Gas Regulator Mounting Mounting Bracket Bracket Nut Screw Mounting Bracket Figure 12 Attaching Heater to Fireplace Floor 104414 OWNER S MANUAL CONNECTING TO GAS SUPPLY A WARNING A qualified service person must connectheaterto gas supply Follow all local codes Installation Items Needed Before installing heater make sure you have the items listed below piping check local codes sealant resistant to propane LP gas e manual shutoff valve test gauge connection sediment trap tee joint pipe wrench An A G A design certified manual shutoff valve with 1 8 NPT tap is an acceptable alternative to test gauge connection Pur chase the optional A G A design certified manual shutoff valve from your dealer See Accessories page 28 A WARNING Never connect heater to private non utility gas wells This gas is commonly known as wellhead gas From Gas Meter 5 W C to 10 5 W C Pressure Tee RS Joint amp Sediment Pipe Trap Nipple UN 3 Minimum Cap
4. through openings not furnished with doors are considered a part of the unconfined space This heater shall not be installed in a con fined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air Adjoining rooms are communicating only if there are doorless passageways or ventila tion grills between them 104414 OWNER S MANUAL AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING FRESH AIR FLOW FOR HEATER LOCATION Determining if You Have a Confined or Unconfined Space Use this work sheet to determine if you have a confined or unconfined space Space Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms 1 Determine the volume of the space length x width x height Length x Width x Height cu ft volume of space Example Space size 20 ft length x 16 ft width x 8 ft ceiling height 2560 cu ft volume of space If additional ventilation to adjoining room is supplied with grills or openings add the volume of these rooms to the total volume of the space 2 Divide the space volume by 50 cubic feet to determine the maximum Btu Hr the space can support volume of space 50 cu ft Maximum Btu Hr the space can support Example 2560 cu ft volume of space 50 cu ft 51 2 or 51 200 maximum Btu Hr the space can support 3 Add the Btu Hr of
5. Avoid any drafts that al ter burner flame patterns Ceiling fans may create drafts that alter burner flame patterns Altered burner patterns can cause sooting Before using furniture polish wax car pet cleaners or similar products turn heater off If heated the vapors from these products may create a white pow der residue within burner box or on adjacent walls or furniture Do not use a blower insert heat ex changer insert or other accessory not approved for use with this heater This heater needs fresh outside air ven tilation to run properly This heater has an oxygen depletion sensor ODS pi lot light safety system The ODS shuts down the heater if not enough fresh air is available See Air for Combustion and Ventilation pages 4 through 6 If heater keeps shutting off see Trouble shooting pages 19 through 21 Do not run heater where flammable liquids or vapors are used or stored under dusty conditions Do not use this heater to cook food or burn paper or other objects Never place any 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 children when they are in the room with heater Do not use heater if any part has been exposed to or under water Immediately call a q
6. Figure 13 Gas Connection A CAUTION Use only new black iron or steel pipe Inter nally tinned copper tubing may be used in certain areas Check your local codes Use pipe of 1 2 diameter or greater to allow proper gas volume to heater If pipe is too small undue loss of pressure will occur Installation mustinclude amanual shutoff valve union and plugged 1 8 NPT tap Locate NPT tap withinreach for test gauge hookup NPT tap must be upstream from heater see Figure 13 Apply pipe joint sealant lightly to male threads This will prevent excess sealant from going into pipe Excess sealant in pipe could result in clogged heater valves A CAUTION Use pipe joint seal ant that is resistant to liquid pe troleum LP gas We recommend that you install a sediment trap in supply line as shown in Figure 13 Locate sediment trap where it is within reach for cleaning Install in piping system between fuel supply and heater Locate sediment trap where trapped matter is not likely to freeze A sediment trap traps moisture and contami nants This keeps them from going into heater controls If sediment trap is not installed or is installed wrong heater may not run properly A CAUTION Avoid damage to regulator Hold gas regulator with wrench when connecting itto gas piping and or fittings A G A Design Certified Manual Shutoff Valve With 1 8 NPT Tap Approved Flexible Gas Hose if a
7. Figure 22 page 15 Note You may be running this heater for the first time after hook ing up to gas supply If so the con trol knob may need to be pressed in for 30 seconds This will allow air to bleed from the gas system With control knob pressed in press and release ignitor button This will light pilot The pilot is attached to the front burner If needed keep press ing ignitor button until pilot lights Note If pilot does not light contact a qualified service person or gas sup plier for repairs Until repairs are made light pilot with match To light pilot with match see Manual Light ing Procedure 7 Keep control knob pressed in for 30 seconds after lighting pilot After 30 seconds release control knob If control knob does not pop out when released contact a qualified service person or gas supplier for repairs Note If pilot goes out repeat steps 3 through 7 8 Pushinand turn control knob coun terclockwise to the HIGH position Both burners should light Set con trol knob to desired setting Ignitor Electrode Pilot Burner Thermocouple Figure 23 Pilot BH VARIABLE CONTROL OPERATION The variable control valve can be set to any heat setting and flame height desired by simply turning the control knob until that setting is attained Even the lowest setting provides realistic flames and glow ing embers from two burners Selecting higher settings produces greater heat output This
8. HEATER Continued A CAUTION Do nottry to adjust heating levels by using the manual shutoff valve E TO TURN OFF GAS TO APPLIANCE Shutting Off Heater Turn control knob clockwise XN to the OFF position Shutting Off Burners Only pilot stays lit Turn control knob clockwise XN to the PILOT position THERMOSTAT CONTROL OPERATION The thermostat control knob can beset to any comfort level between Hi and Lo The thermostat will gradually modulate the heat output and flame height from higher to lower settings or pilot in order to maintain the comfort level you select The ideal comfort setting will vary by household depending upon the amount of space to be heated the output of the central heating system etc Note Selecting the Hi setting with the control knob will cause the burners to remainfully on without modulating down in most cases HE MANUAL LIGHTING PROCEDURE 1 Follow steps 1 through 5 under Light ing Instructions page 14 2 Depress control knob and light pilot with match 3 Keep control knob pressed in for 30 seconds after lighting pilot After 30 seconds release control knob Now follow step 8 page 14 104414 OWNER S MANUAL Manually Controlled Models FOR YOUR SAFETY READ BEFORE LIGHTING A WARNING If you do not fol low these instructions exactly a fire or explosion may result caus ing property damage personal injury or loss of life This
9. SS va Adhesive i Y backed Mounting RS Clip A lt a D Figure 34 Locating Thermostat Sensing Bulb on Factory built Metal Fireplace Sensing Bulb D IN Adhesive ENS backed gt Mounting Clip Zo Thermostat Glass Doors Figure 35 Installing Thermostat Sensing Bulb behind Glass Doors Thermostat Sensing Bulb Adhesive backed Mounting Clip Capillary Do Not Crimp Capillary Figure 36 Positioning the Thermostat Sensing Bulb in the Vertical Position with the Capillary at the Bottom 104414 SPECIFICATIONS 18 Thermostat OWNER S MANUAL 24 Thermostat 30 Thermostat Controlled Controlled Controlled Btu Variable 16 000 26 000 20 000 33 000 21 500 36 000 Type Gas Natural Gas Only Natural Gas Only Natural Gas Only Ignition Piezo Piezo Piezo Manifold Pressure 3 4 W C 3 4 W C 3 4 W C Inlet Gas Pressure in of water Maximum 10 5 10 5 10 5 Minimum 2x 5 5 Shipping Weight 26 lbs 30 Ibs 34 lbs For purpose of input adjustment 18 Variable 24 Variable 30 Variable Manually Manually Manually Controlled Controlled Controlled Btu Variable 16 000 26 000 20 000 33 000 21 500 36 000 Type Gas Natural Gas Only Natural Gas Only Natural Gas Only Ignition Piezo Piezo Piezo Manifold Pressure 3 4 W C 3 4 W C 3 4 W C Inlet Gas Pressure in of water Maximum 10 5 10 5 10 5 Minimum 5 3 2 Shipping Weight 26
10. and Maintenance page 18 or replace ODS pilot assembly 6 Replace gas regulator ODS pilot lights but flame goes out when control knob is released 104414 ns Control knob not fully pressed in Control knob not pressed in long enough Safety interlock system has been triggered Manual shutoff valve not fully open Pilot flame not touching thermocouple which allows thermocouple to cool causing pilot flame to go out This prob lem could be caused by one or both of the following A Low gas pressure B Dirty or partially clogged ODS pilot Thermocouple connection loose at con trol valve Thermocouple damaged Control valve damaged www desatech com 19 1 Press in control knob fully 2 After ODS pilot lights keep control knob pressed in 30 seconds 3 Wait one minute for safety interlock sys tem to reset Repeat ignition operation 4 Fully open manual shut off valve 5 A Contact local natural gas company B Clean ODS pilot see Cleaning and Maintenance page 18 or replace ODS pilot assembly 6 Hand tighten until snug then tighten 1 4 turn more 7 Replace thermocouple 8 Replace control valve Continued DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY One or both burners do not light after ODS pilot is lit 1 Inlet gas pressure is too low 2 Burner orifice s clogged 3 Mislocated cro
11. appliance has a pilot which must be lighted by hand When lighting the pilot follow these instructions exactly BEFORE LIGHTING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric 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 sup plier call the fire department Use only your hand to push in or turn the gas control knob Never use tools If the knob will not push in or turn by hand don t try to repair it call a qualified service technician or gas supplier Force or attempted repair may result in a fire or explosion Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been un der water E LIGHTING INSTRUCTIONS A WARNING If fireplace has glass doors never operate this heater with glass doors closed If you op erate heater with doors closed heat buildup inside fireplace will cause glass to burst Also if fireplace opening has vents at the bottom you must open the vents before operating heater You must operate this heater with afirepla
12. least 1 2 inch thick With sheet metal you must have noncombustible material behind it Noncombustible mate rial 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 page 9 for minimum clearances IMPORTANT If you cannot meet these minimum clearances you must operate heater with chimney flue damper open Go to Installing Damper Clamp Accessory for Vented Operation page 10 Noncombustible Material Distance A Requirements for Safe Installation 12 or more Between 8 and 12 page 28 Less than 8 Noncombustible material OK 24 or 30 Models Install fireplace hood accessory GA6050 GA6052 or GA6053 see Accessories 18 Model Noncombustible material OK Noncombustible 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 Heat Resistant Material Figure 5 Heat Resistant Material Slate Marble Tile etc Above Fireplace 104414 INSTALLATION Continued MANTEL CLEARANCES In addition to meeting noncombustible mate rial clearances you must also meet required clearances between fireplace opening a
13. must provide additional fresh air Unusually tight construction is de fined as construction where a walls and ceilings exposed to the outside atmosphere have a con tinuous water vapor retarder with a rating of one perm 6 x 10 kg per pa sec m or less with open ings 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 be tween sole plates and floors be tween wall ceiling joints be tween wall panels at penetra tions for plumbing electrical and gas lines and at other openings If your home meets all of the three criteria above you must provide ad ditional fresh air See Ventilation Air From Outdoors page 6 If your home does not meet all of the three criteria above proceed to Deter mining Fresh Air Flow For Heater Location page 5 Confined and Unconfined Space The National Fuel Gas Code ANS Z223 1 1992 Section 5 3 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 inputrating of all appliances installed in that space Rooms communicating directly with the space in which the appliances are in stalled
14. results in increased heating comfort A WARNING Do not operate heater between locked positions A CAUTION Do not try to ad just heating levels by using the manual shutoff valve TO APPLIANCE Shutting Off Heater 1 Press in and turn control knob clock wise N to the HIGH position 2 Turn the control knob clockwise ur TO TURN OFF GAS to the PILOT position 3 Pressin control knob and turn clock wise to the OFF Position Shutting Off Burners Only pilot stays lit 1 Turn the control knob clockwise N to the HIGH position 2 Press in and turn control knob clock wise to the pilot position i MANUAL LIGHTING PROCEDURE 1 Follow steps 1 through 5 under Light ing Instructions pages 15 and 16 2 Depress control knob and light pilot with match 3 Keep control knob pressed in for 30 seconds after lighting pilot After 30 seconds release control knob Now follow step 8 column 2 104414 INSPECTING BURNERS Check pilot flame pattern and burner flame patterns often PILOT FLAME PATTERN Figure 24 shows a correct pilot flame pat tern Figure 25 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 heater will shut down If pilot flame pattern is incorrect as shown in Figure 25 turn heater off see To Turn Off Gas to Appliance page 15 thermostat
15. 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 MERCHANTA BILITY AND FITNESS FOR A PARTICULAR PURPOSE TO FOUR 4 YEARS ON ALL COMPONENTS AND FIVE 5 YEARS ON STAINLESS STEEL BURNERS FROM THE DATE OF FIRST PURCHASE AND DESA INTERNATIONAL S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA INTERNATIONAL SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT INCIDENTAL OR CONSE QUENTIAL 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 DI S A INTERNATIONAL 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 www desatech com I 104414 01 104414 01 Rev E NOT A UPC 11 99
16. 1 101053 01 101053 01 Adapter 099211 01 099211 01 099211 01 Screw 098544 01 098544 01 098544 01 Thermostat Clamp 101329 14 101329 16 101329 16 Thermostat Gas Valve Assy 100994 01 100994 01 100994 01 Thermovalve Bracket 101004 11 101004 11 101004 04 Rear Burner Injector 101004 11 101004 08 101004 08 Front Burner Injector 102811 01 102811 01 102811 01 Thermostat Burner Tube 099387 09 099387 09 099387 09 Pilot Tube 102255 01 102255 01 102255 01 Strap 102764 01 102764 01 102764 01 Heat Shield PARTS AVAILABLE NOT SHOWN 100563 01 100563 01 100563 01 Warning Plate 101054 01 101054 01 101054 01 Lighting Instructions Plate 100565 01 100565 01 100565 01 Warning Plate Fastener 100639 01 100639 01 100639 01 Caution Decal 101137 01 101137 01 101137 01 Hardware Kit 101416 38 101416 38 101416 38 Information Video GA6060 GA6060 GA6060 Lava Rock 102030 01 102030 01 102030 01 Auxiliary Thermostat Mtg Clip A AE A ES res Cs Ces Ce 104414 27 DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER ACCESSORIES Purchase these heater accessories from your local dealer If they can not supply these accessories call DESA International s Parts Department at 1 800 972 7879 for referral information You can also write to the ad dress listed on the back page of this manual VALVE GA5010 For all models Manual shutoff valve with 1 8 NPT tap Fits 1 2 NPT pipe FIREPLACE HOOD Black GA6050 Brass GA6052 Antique Brass GA60
17. 14 discolor walls IMPORTANT Vent free heaters add mois ture 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 Com bustion and Ventilation pages 4 through 6 CHECK GAS TYPE Use only natural gas If your gas supply is not natural do not install heater Call dealer where you bought heater for proper type heater INSTALLATION AND CLEARANCES Vent Free Operation Only AX WARNING Maintain the mini mum clearances If you can pro vide greater clearances from floor ceiling and adjoining wall MINIMUM FIREPLACE CLEARANCE TO COMBUSTIBLE MATERIALS Log Size 18 24 30 Side Wall 16 Ceiling 42 Floor 5 LOG SIZING REQUIREMENTS Minimum Firebox Size Log Front Rear Size Height Depth Width Width 18 17 14 20 14 24 17 14 26 18 30 17 14 32 22 Measured at 14 depth Carefully follow the instructions below This will ensure safe installation into a masonry UL127 listed manufactured fireplace or listed vent free firebox Minimum Wall and Ceiling Clearances see Figure 4 A Clearances from the side of the fire place opening to any combustible wall should not be less than 16 inches B Clearances from the top of the fireplace opening to the ceiling should not be less than 42 inches Left and Right Side
18. 53 For all models Helps deflect heat away from mantel or wall above fireplace Fits openings 28 to 48 wide A VENT FREE LOGMATE STOVE SVFBC For models VL18N P VLI8NT A VLISPT A VLI8NV VLI8PV VS18NV B VS18PV B VS18NT A VS18PT A CF18N P CFI8NT A CF18PT A CFSI8NV B CFS18PV B VENT FREE LOGMATE FIREBOXES Not Shown Available in 32 36 and 42 models May be paired with the logs listed below Circu lating fireboxes feature louvers and an op tional blower Non circulating smooth face models are ideal for custom trim applica tions such as stone or marble 28 FB32C CIRCULATING FB32NC NON CIRCULATING SERIES Not Shown For 18 and 24 models FB36CA FB42C SERIES CIRCULATING FB36NCA FB42NC SERIES NON CIRCULATING Not Shown For all 18 24 and 30 models DAMPER CLAMP GA6080 Not Shown For manually controlled models only Per manently opens chimney flue damper for vented operation LAVA ROCK GA6060 Not Shown For all models Order when additional rock is desired 3 lb bag 104414 OWNER S MANUAL NOTES 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 wa
19. 99387 08 098276 01 103042 01 098594 01 098593 01 098249 01 104388 03 104390 03 104392 03 104394 03 101006 01 101330 06 101008 01 101007 01 100999 06 101331 09 098271 06 102445 01 098867 09 M11084 38 101011 03 098394 01 098462 03 098325 01 098508 01 102568 01 101005 01 M11084 26 101004 04 101004 08 102258 01 099387 08 098276 01 103042 01 098594 01 098593 01 098249 01 Front Log 1 Middle Log 2 Rear Log 3 Crossover Log 4 Pilot Bracket Front Burner Assembly Crossover Burner Gasket Crossover Burner Rear Burner Assembly Base Assembly Includes Decals Ignitor Cable Piezo Ignitor Gas Regulator Screw Inlet Tube Control Knob Control Rod Roll Pin Valve Retainer Nut Gas Valve Valve Bracket Screw Rear Burner Injector Front Burner Injector Burner Tube Pilot Tube 1 8 Plug O D S Pilot Ignitor Electrode Thermocouple Nut OWNER S MANUAL A COR CN SQ CC RE CORR CORE CE CR OR CE CR CREE CR OREO CC CE COC CC CI PARTS AVAILABLE NOT SHOWN 100563 01 101055 02 100565 01 100639 01 101137 03 101416 38 GA6060 104414 100563 01 101055 02 100565 01 100639 01 101137 03 101416 38 GA6060 100563 01 101055 02 100565 01 100639 01 101137 03 101416 38 GA6060 25 Warning Plate Lighting Instructions Plate Warning Plate Fastener Caution Decal Hardware Kit Information Video Lava Rock DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER ILLUSTR
20. ATED PARTS BREAKDOWN i THERMOSTAT CONTROLLED SPLIT OAK MODELS VS18NTB VS24NTB VS30NTB 26 104414 OWNER S MANUAL PARTS LIST This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 23 of this manual THERMOSTAT CONTROLLED SPLIT OAK MODELS VS18NTB VS24NTB KEY PART NUMBER FOR VS30NTB NO VSSONTB DESCRIPTION 104388 01 104388 02 104388 03 Front Log 1 104390 01 104390 02 104390 03 Middle Log 2 104392 01 104392 02 104392 03 Rear Log 3 104394 01 104394 02 104394 02 Crossover Log 4 M11084 26 M11084 26 M11084 26 Screw 103042 01 103042 01 103042 01 O D S Pilot 098594 01 098594 01 098594 01 Ignitor 098593 01 098593 01 098593 01 Thermocouple 098249 01 098249 01 098249 01 Nut 101006 01 101006 01 101006 01 Pilot Bracket 101330 01 101330 05 101330 06 Front Burner Assembly 101008 01 101008 01 101008 01 Gasket Crossover Burner 101007 01 101007 01 101007 01 Crossover Burner 100999 04 100999 05 100999 06 Rear Burner Assembly 101331 05 101331 06 101331 07 Base Assembly with decals 098271 07 098271 06 098271 06 Ignitor Cable 102445 01 102445 01 102445 01 Piezo lgnitor 098867 09 098867 09 098867 09 Gas Regulator M11084 38 M11084 38 M11084 38 Screw 102810 01 102810 02 102810 03 Inlet Tube 098354 01 098354 01 098354 01 Control Knob 098462 03 098462 03 098462 03 Control Rod 100000 01 100000 01 100000 01 Cotter Pin 101053 0
21. DESA INTERNATIONAL UNVENTED VENT FREE NATURAL GAS LOG HEATER Variable Manually Controlled Models Also Design Certified As Vented Decorative Appliances OWNER S OPERATION AND INSTALLATION MANUAL 18 24 and 30 C Models Variable Manually Controlled and B Models Thermostatically Controlled c S Re E g S ER RR I Mie eS S AST A Ya ANS RARE DA Y 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 e Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier fromaneighbor s phone Follow the gas supplier s instructions e If you cannot reach your gas sup plier call the fire department Installation and service must be per formed by a qualified installer ser vice agency or the gas supplier WARNING Improper installation ad justment alteration service or main tenance can cause injury or property damage Refer to this manual for cor rect installation and operational proce dures For assistance or additional in formation consult a qualified installer service agency or the gas supplie
22. NATURAL GAS LOG OPERATING HEATER Thermostat Controlled Models FOR YOUR SAFETY READ BEFORE LIGHTING A WARNING If you do not fol low these instructions exactly a fire or explosion may result caus ing property damage personal injury or loss of life A This appliance has a pilot which must be lighted by hand When lighting the pilot follow these instructions exactly B BEFORE LIGHTING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric 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 sup plier call the fire department C Use only your hand to push in or turn the gas control knob Never use tools If the knob will not push in or turn by hand don t try to repair it call a qualified service technician or gas supplier Force or attempted repair may result in a fire or explosion D Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been un der water WE LIGHTING INSTRUCTIONS A WARNING If fireplace has glass doors neve
23. Pressurize supply piping system by ei ther 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 15 Apply mixture of liquid soap and wa ter to gas joints Bubbles forming show a leak 4 Correct all leaks at once Manual Shutoff open Valve Closed Figure 14 Manual Shutoff Valve Manual Shutoff Valve Pressure Testing Heater Gas Connections 1 Open manual shutoff valve see Fig ure 14 Open main gas valve located on or near gas meter Make sure control knob of heater is in the OFF position Check all joints from manual shutoff valve to thermostat gas valve thermo stat controlled models or control valve manually controlled models see Fig ure 15 Apply mixture of liquid soap and water to gas joints Bubbles form ing show a leak Correct all leaks at once Light heater see Operating Heater pages 14 through 16 Check all other internal joints for leaks Turn off heater see To Turn Off Gas to Appliance page 15 thermostat controlled models or page 16 manu ally controlled models Thermostat Gas Valve or Control Valve Location Gas Meter Figure 15 Checking Gas Joints 104414 INSTALLATION Continued INSTALLING LOGS A WARNING Failure to posi tion the parts in accordance with these diagrams or failure to use only parts specifically approved with this hea
24. all fuel burning appliances in the space Vent free heater Btu Hr Gas water heater Btu Hr Example Gas furnace Btu Hr i Vented gas heater Btu Hr Gas water heater 40 000 Btu Hr Gas fireplace logs Btu Hr Vent free heater 33 000 Btu Hr Other gas appliances Btu Hr Total 73 000 Btu Hr Total Btu Hr Do not include direct vent gas appliances Direct vent draws combustion air from the outdoors and vents to the outdoors 4 Compare the maximum Btu Hr the space can support with the actual amount of Btu Hr used Btu Hr maximum the space can support Btu Hr actual amount of Btu Hr used Example 51 200 Btu Hr maximum the space can support 73 000 Btu Hr actual amount of Btu Hr used The space in the above example is a confined space because the actual Btu Hr used is more than the maximum Btu Hr the space can support You must provide additional fresh air Your options are as follows A Rework worksheet adding the space of an adjoining room If the extra space provides an unconfined space remove door to adjoining room or add ventilation grills between rooms See Ventilation Air From Inside Building page 6 B Vent room directly to the outdoors See Ventilation Air From Outdoors page 6 C Install a lower Btu Hr heater if lower Btu Hr size makes room unconfined If the actual Btu Hr used is less than the maximum Btu Hr the space can support the space is an unconfined space You will need no additional
25. ce screenin place Make sure fireplace screen is closed before running heater NOTICE During initial operation of new heater burning logs will give off a paper burning smell Orange flame will also be present Open damper or window to vent smell This willonly lasta few hours Note Home owners generally prefer to operate their heater with the chimney damper closed This will put all the heat into the room However there may be times you will desire the full flames of the High heat setting but will find the heat output excessive You can open the chim ney damper if you have one fully or partially to release some of the heat AX WARNING Damper handle will be hot if heater has been running 1 STOP Read the safety information above 2 Make sure manual shutoff valve is fully open 3 Pressin and turn control knob clock wise N to the OFF position Ignitor Button Control Knob Figure 22 Control Knob and Ignitor Button Location Continued DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER OPERATING HEATER Continued 4 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety in formation page 15 column 2 If you don t smell gas go to the next step Press in control knob and turn coun terclockwise tothe PILOT po sition Keep control knob pressed in for five 5 seconds see
26. con trolled models or page 16 manually controlled models seeTroubleshooting pages 19 through 21 Thermocouple Pilot Burner Figure 24 Correct Pilot Flame Pattern Thermocouple P Pilot Burner Figure 25 Incorrect Pilot Flame Pattern 104414 OWNER S MANUAL FRONT BURNER FLAME PATTERN Figure 26 shows correct front burner flame pattern Figure 27 shows incorrect front burner flame pattern The incorrect burner flame pattern shows yellow tipping attop of blue flame A WARNING If yellow tipping occurs your heater could pro duce increased levels of carbon monoxide If front burner flame pattern shows yellow tipping fol low instructions at bottom of this page Yellow flame on rear burner is normal NOTICE Do not mistake orange flames with yellow tipping Dirt or other fine particles are burned by heater causing brief patches of orange flame If front burner flame pattern is incorrect as shown in Figure 27 turn heater off see To Turn Off Gas to Appliance page 15 thermostat con trolled models or page 16 manually controlled models e see Troubleshooting pages 19 through 21 o Figure 26 Correct Front Burner Flame Pattern Yellow Tipping At Top of Blue Flame Figure 27 Incorrect Front Burner Flame Pattern DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER CLEANING AND MAINTENANCE WARNING Turn off heater and let cool before cleaning
27. dels only Never install the heater e 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 Before installing in a solid fuel burn ing fireplace the chimney flue and fire box must be cleaned of soot creosote ashes and loose paint by a qualified chimney cleaner Creosote will ignite if highly heated Inspect chimney flue for damage If damaged operate heater with flue damper closed Tf fireplace has glass doors never op erate this heater with glass doors closed If you operate heater with doors closed heat buildup inside fireplace will cause glass to burst Also if fireplace open ing has vents at the bottom you must open the vents before operating heater You must operate this heater with a fire place screen in place Make sure fire place screen is closed before running heater This log heater is designed to be smoke less 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 manufactur ing residues To prevent the creation of soot follow the instructions in Cleaning and Main tenance page 18 a o 11 12 13 14 15 16 17 18 19 20 21 22 Do not allow fans to blow directly into the fireplace
28. eadaches dizziness or nausea If you have these signs the heater may not be working properly Get fresh air at once Have heaterserviced 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 Gas Natural gas is 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 Warnings Keep this manual for reference Itis your guide to safe and proper operation of this heater A WARNING Any change to this heater or its controls can be dangerous 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 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 This heater shall not be installed in a bed room or bathroom unless installed as a vented appliance See Installing Damper Clamp Accessory for Vented Operation page 10 Variable Manually Controlled mo
29. ervicing Only a qualified ser vice person should service and repair heater POSSIBLE CAUSE A CAUTION Never use a wire needle or similar object to clean ODS pilot This can damage ODS pilot unit REMEDY When ignitor button is pressed there is no spark at ODS pilot 1 2 YUAN Ignitor electrode not connected to igni tor cable Ignitor cable pinched or wet Piezo ignitor nut is loose Broken ignitor cable Bad piezo ignitor Ignitor electrode positioned wrong Ignitor electrode broken 1 Reconnect ignitor cable 2 Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry 3 Tighten nut holding piezo ignitor to base panel of log set Nut is located behind base panel 4 Replace ignitor cable 5 Replace piezo ignitor 6 Replace ignitor 7 Replace ignitor When ignitor button is pressed there is spark at ODS pilot but no ignition W Gas supply turned off or manual shutoff valve closed Control knob not in PILOT position Control knob not pressed in while in PILOT position Air in gas lines when installed ODS pilot is clogged Gas regulator setting is not correct 1 Turn on gas supply or open manual shutoff valve 2 Turn control knob to PILOT position 3 Press in control knob while in PILOT position 4 Continue holding down control knob Repeat igniting operation until air is removed 5 Clean ODS pilot see Cleaning
30. fresh air ventilation A 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 ANS 2223 1 1992 Section 5 3 or applicable local codes Continued 104414 5 DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER AIR FOR COMBUSTION AND VENTILATION Ventilation Continued Grills Ventilation Grills VENTILATION AIR Into Adjoining O Into Adjoining Room r Room Rermiove Option 2 Ventilation Air From Inside i Option 1 Door into Building Adjoining SS This fresh air would come from an adjoining Room unconfined space When ventilating to an Option O adjoining unconfined space you must pro 3 vide two permanent openings one within 12 of the ceiling and one within 12 of the floor on the wall connecting the two spaces see options 1 and 2 Figure 2 You can also remove door into adjoining room see op tion 3 Figure 2 Follow the National Fuel Gas Code NFPA 54 ANS Z223 1 Section 5 3 Air for Combustion and Ventilation for required size of ventilation grills or ducts Figure 2 Ventilation Air from Inside Building AX WARNING Rework work sheet adding the space of the adjoining unconfined space The combined spaces must have enough fresh a
31. he thermostat sensing bulb or capillary Gas Valve Assembly Thermostat Sensing Bulb Figure 30 Location of Gas Valve Assembly and Thermostat Sensing Bulb 3 The thermostat sensing bulb may be located to the lower right front side of fireplace Determine location of sens ing bulb but do not mount sensing bulb until step 5 If you have a masonry fire place see Figure 33 for location If you have a factory built metal fire place see Figure 34 for location If your fireplace has glass doors posi tion sensing bulb directly behind door gap on right bottom side see Figure 35 Figure 31 Adhesive backed Mounting Clip Capillary Thermostat Sensing Bulb Retaining Clamp Figure 32 Removing Thermostat Sensing Bulb Thermostat wa Sensing Bulb E ii Adhesive Al Ux backed Mounting Clip Screw bL Figure 33 Locating Thermostat Sensing Bulb on Masonry Fireplace 22 4 Themounting clip must be a minimum of 3 from bottom of fireplace to pre vent crimping of capillary Once you have decided on a location clean the area thoroughly Remove the paper backing from the adhesive on back of mounting clip Press the clip into the new location so that the thermostat sensing bulb will be positioned verti cally with the capillary at the bottom see Figure 36 Slide the thermostat sensing bulb into the clip IMPORTANT Do not crimp capillary n Thermostat Sensing a ES Bulb o
32. ir through the ports slots and holes in the burner 4 Checkthe injector holder located at the end of the burner tube again Remove any large particles of dust dirt lint or pet hairs with a soft cloth or vacuum cleaner nozzle 5 Blow air into the primary air holes on the injector holder 6 Incase any large clumps of dust have now been pushed into the burner repeat steps 3 and 4 Clean the pilot assembly also A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly There is a small pilot air inlet hole about two inches from where the pilot flame comes out of the pilot assembly see Figure 29 With the unit off lightly blow air through the air inlet hole You may blow through adrinking straw if compressed air is not available Injector Holder gt TA Ports Slots s A Burner Tube Primary Air Inlet Holes Figure 28 Injector Holder On Outlet Burner Tube Figure 29 Pilot Inlet Air Hole LOGS If you remove logs for cleaning refer to Installing Logs page 13 to properly re place logs Replace log s if broken or chipped dime sized or larger 104414 TROUBLESHOOTING Note For additional help visit DESA International s Technical Service web site at www desatech com Note All troubleshooting items are listed in order of operation OBSERVED PROBLEM OWNER S MANUAL WARNING Turn off and un plug heater and let cool before s
33. ir to supply all appliances in both spaces RSS Ventilated Attic Ventilation Air From Outdoors rea Provide extra fresh air by using ventilation TOAG grills or ducts You must provide two per manent openings one within 12 of the ceiling and one within 12 of the floor To Connect these items directly to the outdoors SN or spaces open to the outdoors These spaces Inlet p include attics and crawl spaces Follow the Air National Fuel Gas Code NFPA 54 ANS Z223 1 Section 5 3 Airfor Combustion and Ventilation for required size of ventilation grills or ducts IMPORTANT Do not provide openings for inlet or outlet air into attic if attic has a thermostat controlled power vent Heated air entering the attic will activate the power vent Ventilated Inlet Crawl Space Figure 3 Ventilation Air from Outdoors 6 104414 INSTALLATION OWNER S MANUAL NOTICE This heater is intended for use as supplemental heat Use this heater along with your pri mary heating system Do not in stall this heater as your primary heat source If you have a central heating system you may run system s circulating blower while using heater This will help circu late the heat throughout the house In the event of a power outage you can use this heater as your primary heat source AX WARNING Never install the heater ina bedroom or bathroom un less installed as a vented ap pliance see
34. lbs 30 Ibs 34 Ibs For purpose of input adjustment SERVICE HINTS When Gas Pressure Is Too Low pilot will not stay lit burners will have delayed ignition heater will not produce specified heat When Gas Quality Is Bad pilot will not stay lit burners will produce flames and soot heater will backfire when lit You may feel your gas pressure is too low or gas quality is bad If so contact your local natural gas supplier 104414 TECHNICAL SERVICE You may have further questions about in stallation operation or troubleshooting If so contact DESA International s Technical Service Department at 1 800 DESA LOG 1 800 337 2564 You can also visit DESA International s Technical Services web site at www desatech com 23 REPLACEMENT PARTS 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 International s Techni cal Service Department at 1 800 323 5190 When calling DESA International have ready your name your address model and serial numbers of your heater how heater was malfunctioning type of gas used propane LP or natural gas purchase date Usually we will ask you to return the defec tive part to the factory PARTS NOT UNDER WARRANTY Contact authorized dea
35. lers of this product If they can t supply original replacement part s call DESA International s Parts Department at 1 800 972 7879 for referral information When calling DESA International have ready model number of your heater the replacement part number DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER ILLUSTRATED PARTS BREAKDOWN f VARIABLE MANUALLY L CONTROLLED SPLIT OAK MODELS VS18NVC CFS18NVC VS24NVC CFS24NVC VS30NVC CFS30NVC 24 104414 PARTS LIST VARIABLE MANUALLY This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 23 of this manual CONTROLLED SPLIT OAK MODELS VS18NVC CFS18NVC VS24NVC CFS24NVC VS30NVC CFS30NVC 104388 01 104390 01 104392 01 104394 01 101006 01 101330 01 101008 01 101007 01 100999 04 101331 10 098271 07 102445 01 098867 09 M11084 38 101011 01 098354 01 098462 03 098325 01 098508 01 102568 01 101005 01 M11084 26 101004 11 101004 11 102258 01 099387 08 098276 01 103042 01 26 1 098594 01 26 2 098593 01 098249 01 PART NUMBER FOR KEY EE VS24NVC CFS24NVC VS30NVC CFS30NVC 104388 02 104390 02 104392 02 104394 02 101006 01 101330 05 101008 01 101007 01 100999 05 101331 08 098271 06 102445 01 098867 09 M11084 38 101011 02 098354 01 098462 03 098325 01 098508 01 102568 01 101005 01 M11084 26 101004 11 101004 08 102258 01 0
36. llowed by local codes Purchase the optional A G A design certified manual shutoff valve from your dealer See Accessories page 28 Minimum inlet pressure for purpose of input adjustment 11 Continued DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER INSTALLATION Continued CHECKING GAS CONNECTIONS A WARNING Test all gas pip ing and connections for leaks after installing or servicing Cor rect all leaks at once A WARNING Never use an open flame to check for a leak Apply a mixture of liquid soap and water to all joints Bubbles forming show a leak Correct all leaks at once Pressure Testing Gas Supply Piping System Test Pressures In Excess Of 1 2 PSIG 1 Disconnect heater and its individual manual shutoff valve from gas supply piping system Pressures in excess of 1 2 psig will damage heater regulator 2 Cap off open end of gas pipe where manual shutoff valve was connected 3 Pressurize supply piping system by ei ther using compressed air or opening main gas valve located on or near gas meter 4 Check all joints of gas supply piping system Apply mixture of liquid soap and water to gas joints Bubbles form ing show a leak 5 Correct all leaks at once 6 Reconnect heater and manual shutoff valve to gas supply Check reconnected fittings for leaks Test Pressures Equal To or Less Than 1 2 PSIG 1 Close manual shutoff valve see Fig ure 14 2
37. ly open chimney flue damper You must install the damper clamp accessory to order see Accessories page 28 This will insure vented operation see Figure 10 The damper clamp will keep damper open Installation instructions are included with clamp accessory See chart below for minimum permanent flue opening you must provide Attach damper clamp so the minimum permanent flue opening will be maintained at all times Area of Various Standard Round Flues Diameter ins Area sq ins 5 20 sq inches 6 29 sq inches 7 39 sq inches 8 51 sq inches Chimney Minimum Permanent Height ft Flue Opening sq ins 6 to 15 39 sq inches 15 to 30 29 sq inches Damper Clamp Ne XY Damper Masonry Fireplace Figure 10 Attaching Damper Clamp INSTALLING HEATER BASE ASSEMBLY A CAUTION Do not remove the metal data plates attached to the heater base assembly The data plates contain important warranty information A WARNING You must secure this heater to fireplace floor If not heater will move when you adjust controls Moving heater may cause a gas leak A WARNING If installing ina sunken fireplace special care is needed You must raise the fireplace floor to allow access to heater control panel This will insure adequate air flow and guard against sooting Raise fireplace floor with noncombus tible material Make sure mate rial is secure
38. matter Locate and correct all leaks see Check ing Gas Connections page 12 Log set cycles to pilot but room tempera ture drops to a lower than ideal level before log set comes back on 104414 Thermostat sensing bulb needs to be re positioned www desatech com 21 Reposition thermostat sensing bulb see Optional Positioning of Thermostat Sensing Bulb page 22 DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB FOR MASONRY AND FACTORY BUILT METAL FIREPLACE If your log set cycles to pilot but the room temperature drops to a lower than ideal comfort level before the log set comes back on you may want to reposition the thermo stat sensing bulb The thermostat sensing bulb is located on the gas valve assembly This location allows the thermostat to keep the room temperature at an ideal comfort level for most fireplace applications For positioning the thermostat sensing bulb elsewhere an adhesive backed mounting clip is available Tools needed 5 16 hex driver or socket 1 Locate the gas valve assembly and ther mostat sensing bulb see Figure 30 2 With 5 16 hex driver or socket loosen the thermostat screw Carefully slide the thermostat sensing bulb out of the retaining clamp see Figure 32 Note Do not remove the screw Make sure you tighten the screw after remov ing the thermostat sensing bulb IMPORTANT Do not force or bend t
39. nd mantel shelf If you do not meet the clear ances losted below you will need a hood Determining Minimum Mantel Clearance If you meet minimum clearance between mantel shelf and top of fireplace opening a hood is not required see Figure 6 Determining Minimum Mantel Clearance When Using a Hood If minimum clearances in Figure 6 are not met you must have a hood When using a hood there are still certain minimum mantel clearances required Follow minimum clear ances shown in Figure 7 when using hood NOTICE If your installation does not meetthe minimum clearances shown you must do one of the following operate the logs only with the flue damper open raise the mantel to an accept able height remove the mantel FLOOR CLEARANCES A Ifinstalling appliance on the floor level you must maintain the minimum dis tance of 14 to combustibles see Fig ure 8 B If combustible materials are less than 14 to the fireplace you must install appliance at least 5 above the combus tible flooring see Figure 9 104414 OWNER S MANUAL Mantel Shelf Underside of Mantel Shelf All minimum distances are in inches Minimum Non Combustible Log Set Material 3 24 24 30 Models 16 3 4 18 1 2 20 18 Model Y Minimum Non Distances to Combustible Underside of Material Height Mantel Top of Fireplace Opening Figure 6 Minimum Mantel Clea
40. other fuel burning appliances in your home Today s homes are built more energy effi cient than ever New materials increased insulation and new construction methods helpreduce heat loss inhomes Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in During heating months home owners want their homes as airtight as possible While it is good to make your home energy efficient your home needs to breathe Fresh air must enter your home All fuel burning appliances need fresh air for proper com bustion and ventilation Exhaust fans fireplaces clothes dryers and fuel burning appliances draw air from the house to operate You must provide ad equate 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 NFPA 54 ANS Z223 1 Sec tion 5 3 Air for Combustion and Ventilation All spaces in homes fall into one of the three following ventilation classifications 1 Unusually Tight Construction 2 Unconfined Space 3 Confined Space The information on pages 4 through 6 will help you classify your space and provide adequate ventilation Unusually Tight Construction The air that leaks around doors and win dows may provide enough fresh air for combustion and ventilation However in buildings of unusually tight construction you
41. ove If you don t smell gas go to the next step 5 Turn control knob counterclockwise FK to the PILOT position Press in control knob for five 5 sec onds see Figure 20 Note You may be running this heater for the first time after hook ing up to gas supply If so the con trol knob may need to be pressed in for 30 seconds or less This will allow air to bleed from the gas system 6 With control knob pressed in press and release ignitor button This will light pilot The pilot is attached to the front burner If needed keep press ing ignitor button until pilot lights Note If pilot does not stay lit con tact a qualified service person or gas supplier for repairs Until repairs are made light pilot with match To light pilot with match see Manual Light ing Procedure on page 15 7 Keep control knob pressed in for 30 seconds after lighting pilot After 30 seconds release control knob f control knob does not pop out when released contact a qualified service person or gas supplier for repairs Note If pilot goes out repeat steps 3 through 7 This heater has a safety interlock system Wait one 1 minute for system to reset before lighting pilot again 8 Turn control knob counterclockwise FK to desired heating level The burners should light Set control knob to any heat level between HI and LO Ignitor Electrode Thermocouple __ Pilot Burner Figure 21 Pilot 104414 OPERATING
42. ove all protective packaging ap plied to logs and heater for shipment 3 Check all items for any shipping dam age If damaged promptly inform dealer where you bought heater PRODUCT FEATURES OPERATION This heater is clean burning It requires no outside venting There is no heat loss out a vent or up a chimney Heat is generated by both realistic flames and glowing coals This heater is designed for vent free opera tion with flue damper closed It has been tested and approved to ANS Z21 11 2 stan dard for unvented heaters State and local codes in some areas prohibit the use of vent free heaters This heater may also be oper ated as a vented decorative ANS Z21 60 product by opening the flue damper non thermostat models only SAFETY DEVICE This heater has a pilot with an Oxygen Detection Safety Pilot System ODS 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 PIEZO IGNITION SYSTEM This heater has a piezo ignitor This system requires no matches batteries or other sources to light heater DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER AIR FOR COMBUSTION AND VENTILATION A WARNING This heater shall not be installed ina confined space or unusually tight construction unless provisions are provided foradequate combustion and ven tilation air Read the following in structions to insure proper fresh air for this and
43. page 10 Variable Manually Controlled models only inarecreational vehicle where curtains furniture clothing or other flammable objects are lessthan 42inches from the front top or sides of the heater e in high traffic areas in windy or drafty areas A WARNING A qualified ser vice person must install heater Follow all local codes NOTICE State or local codes may only allow operation ofthis appli ance in a vented configuration Check your state or local codes Ay 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 quali fied chimney cleaner Creosote will ignite if highly heated A dirty chimney flue may create and dis tribute soot within the house In spect chimney flue for damage If damaged operate heater with flue damper closed A CAUTION This heater cre ates warm air currents These currents move heat to wall sur faces next to heater Installing heater next to vinyl or cloth wall coverings or operating heater where impurities such as to bacco smoke aromatic candles cleaning fluids oil or kerosene lamps etc in the air exist may A WARNING Seal any fresh air vents or ash clean out doors lo cated 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 1044
44. r WARNING This appliance is for instal lation only in a solid fuel burning ma sonry or UL127 factory built fireplace or in an approved ventless firebox It is design certified for these installations in accordance with ANS Z21 11 2 Exception Do not install this appli ance in a factory built fireplace that includes instructions stating it has not been tested or should not be used with unvented gas logs WARNING This is an unvented gas fired heater It uses air oxygen from the room in which it is installed Provisions for adequate combustion and ventilation air must be provided Refer to Air for Combustion and Ventilation section on page 4 of this manual This appliance may be installed in an aftermarket manufactured mobile home where not prohib ited by state or local codes Aftermarket Completion of sale not for purpose of resale from the manufacturer Save this manual for future reference DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER SAFETY INFORMATION A WARNINGS IMPORTANT Read this owner s manual carefully and completely before trying to assemble oper ate or service this heater Im proper use of this heater can causeserious injury or death from burns fire explosion electrical shock and carbon monoxide poisoning AX DANGER Carbon monoxide poisoning may lead to death Carbon Monoxide Poisoning Early signs of carbon monoxide poisoning re semble the flu with h
45. r and create odors These odors will disappear over time OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Heater produces a clicking ticking noise just after burners are lit or shut off 1 Metal expanding while heating or con tracting while cooling 1 This is common with most heaters If noise is excessive contact qualified ser vice person Heater produces unwanted odors Heater burning vapors from paint hair spray glues cleaners chemicals new carpet etc See IMPORTANT state ment above Gas leak See Warning statement at top of page Open window and ventilate room Stop using odor causing products while heater is running Locate and correct all leaks see Check ing Gas Connections page 12 Heater shuts off in use ODS operates Not enough fresh air is available Low line pressure ODS pilot is partially clogged Open window and or door for ventilation Contact local natural gas company Clean ODS pilot see Cleaning and Maintenance page 18 Gas odor even when control knob is in OFF position Gas leak See Warning statement at top of page Control valve defective Locate and correct all leaks see Check ing Gas Connections page 12 Replace control valve Gas odor during combustion Foreign matter between control valve and burner Gas leak See Warning statement at top of page Take apart gas tubing and remove for eign
46. r operate this heater with glass doors closed If you op erate heater with doors closed heat buildup inside fireplace will cause glass to burst Also if fireplace opening has vents at the bottom you must open the vents before operating heater You must operate this heater with afireplace screenin place Make sure fireplace screen is closed before running heater NOTICE During initial operation of new heater burning logs will give off a paper burning smell Orange flame will also be present Open damper or window to vent smell This willonly lasta few hours Note Home owners generally prefer to operate their heater with the chimney damper closed This will put all the heat into the room However there may be times you will desire the full flames of the Hi heat setting but will find the heat output excessive You can open the chim ney damper if you have one fully or partially to release some of the heat AX WARNING Damper handle will be hot if heater has been running 1 STOP Read the safety information above 2 Make sure manual shutoff valve is fully open 3 Turn control knob clockwise to the OFF position Control Knob Ignitor Button Figure 20 Control Knob and Ignitor Button Location HEATER 4 Waitfive 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety in formation ab
47. rances Without Using Hood Mantel Shelf Underside of Mantel Shelf All minimum distances are in inches Log Sets 8 12 15 18 20 18 24 Min amp 30 Models ue Top of Fireplace c mcl Opening Distances to Underside of Mantel Minimum Non Combustible Material GA6050 GA6052 or GA6053 Figure 7 Minimum Mantel Clearances When Using Hood Hearth Combustible 14 Material Min md E Combustible l KAXANAAANY Material 5 Noncombustible j Min Material Figure 9 Minimum Fireplace Clearances Figure 8 Minimum Fireplace Clearances Above Combustible Flooring If Installed at Floor Level Continued DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER INSTALLATION Continued INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION Note When used as a vented heater appli ance must be installed only in a solid fuel burning fireplace with a working flue and constructed of noncombustible material If yourheaterisa manually controlled model you may use this heater as a vented product There are three reasons for operating your heater in the vented mode 1 The fireplace does not meet the clear ance to combustibles requirements for vent free operation 2 State or local codes do not permit vent free Operation 3 You prefer vented operation If reasons number 1 or 2 above apply to you you must permanent
48. rifice s 1 Turn control knob to LO position and let warm up for a minute 2 Operate burners until air is removed from line Have gas line checked by lo cal natural gas company 3 Observe minimum installation clear ances see pages 7 through 9 4 Clean burners see Cleaning and Main tenance page 18 or replace burner orifice s Moisture condensation noticed on windows 1 Not enough combustion ventilation air 1 Refer to Air for Combustion and Venti lation requirements page 4 White powder residue forming within burner box or on adjacent walls or furniture 1 When heated vapors from furniture pol ish wax carpet cleaners etc turn into white powder residue www desatech com 20 1 Turn heater off when using furniture polish wax carpet cleaners or similar products 104414 TROUBLESHOOTING Continued OWNER S MANUAL building Ay 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 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 heater where impurities in air exist may create odors Cleaning supplies paint paint remover cigarette smoke cements and glues new carpet or textiles etc create fumes These fumes may mix with combustion ai
49. rranty applicable is our standard written warranty We make no other warranty expressed or implied LIMITED WARRANTY VENT FREE NATURAL GAS LOG HEATERS DESA International warrants this product to be free from defects in materials and components for four 4 years and five 5 years on stainless steel burners from the date of first purchase provided that the product has been properly installed operated and maintained 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 International who will provide original factory replacement parts Failure to use original factory replacement parts voids this warranty 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 aresult of misuse accidents lack of proper maintenance or defects caused by improper installation Travel diagnostic cost labor transportation and any and all
50. s a Figure 4 Minimum Clearance to Walland Ceiling Continued DESA INTERNATIONAL UNVENTED NATURAL GAS LOG HEATER INSTALLATION Continued NOTICE Manual control heaters may be used as a vented product If so you must always run heater with chimney flue damper open If running heater with damper open noncombustible material above fireplace opening is not needed Go to Installing Damper Clamp Accessory for Vented Operation page 10 Minimum Noncombustible Material Clearances If Not Using Mantel Note If using a mantel proceed to If Using Mantel If not using a mantel follow the information on this page You must have noncombustible material s above the fireplace opening Noncombus tible 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 mate rial must extend at least 8 up for all mod els If noncombustible material is less than 12 you must install the fireplace hood accessory 24 and 30 models only See Figure 5 for minimum clearances IMPORTANT If you cannot meet these minimum clearances you must operate heater with chimney flue damper open Go to Installing Damper Clamp Accessory for Vented Operation page 10 If Using Mantel You must have noncombustible material s above the fireplace opening Noncombus tible materials such as slate marble tile etc must be at
51. ssover tube 4 Burner orifice s diameter is too small 1 Contact local natural gas company 2 Clean burner s see Cleaning and Main tenance page 18 or replace burner orifice s 3 Contact qualified service person 4 Replace burner orifice s Delayed ignition of one or both burners 1 Manifold pressure is too low 2 Burner orifice s clogged 3 Mislocated crossover tube 1 Contact local natural gas company 2 Clean burner s see Cleaning and Main tenance page 18 or replace burner orifice s 3 Contact qualified service person Burner backfiring during combustion 1 Burner orifice is clogged or damaged 2 Damaged burner 3 Gas regulator defective 1 Clean burner see Cleaning and Main tenance page 18 or replace burner orifice 2 Replace damaged burner 3 Replace gas regulator Yellow flame in front burner during burner combustion 1 Not enough air 2 Gas regulator defective 1 Check burner s for dirt and debris If found clean burner s see Cleaning and Maintenance page 18 2 Replace gas regulator Slight smoke or odor during initial operation 1 Residues from manufacturing processes and logs curing 1 Problem will stop after a few hours of operation Heater produces a whistling noise when burners are lit 1 Turning control knob to HI position when burners are cold 2 Air in gas line 3 Air passageways on heater blocked 4 Dirty or partially clogged burner o
52. ter may result in prop erty damage or personal injury 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 heater 1 Place front log 1 on top of the grate Make sure the notches in the bottom of the log fits over the grate prongs see Figure 16 Push back of logs flush with metal grate bar 2 Rest middle log 2 behind metal posts on front burner Make sure the grooves in the bottom of the log fit over the grate Bring the log forward next to the metal posts The cut out on the middle log must be on top see Figure 17 3 Slide the grooves in the back of the rear log 3 against the rear grate prongs Make sure the peg on the log is on top see Figure 18 4 Place the crossover log 4 on the back log and the middle log Make sure the peg on the rear log is in the hole in the bottom of the crossover log The cross over log should fit in the cutout of the middle log see Figure 19 104414 OWNER S MANUAL Front Log 1 Figure 16 Installing Front Log 1 Middle Log 2 Figure 17 Installing Middle Log 2 Groove in Back of Log Rear Log 3 Grate Prong Rear Burner Figure 18 Installing Rear Log 3 Crossover Log 4 Cutout Figure 19 Installing Crossover Log 4 DESA INTERNATIONAL UNVENTED
53. ualified service technician to in spect the room heater and to replace any part of the control system and any gas control which has been under water Do not operate heater if any log is bro ken Do not operate heater if a log is chipped dime sized or larger Turn heater off and let cool before ser vicing Only a qualified service person should service and repair heater Operating heater above elevations of 4 500 feet may cause pilot outage 104414 PRODUCT IDENTIFICATION Front Branch Control Knob Figure 1 Split Oak Design Model LOCAL CODES Install and use heater with care Follow all local codes In the absence of local codes use the latest edition of The National Fuel Gas Code ANS Z223 1 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 Note Where listed vented decorative logs are required thermostat models are not permitted 104414 OWNER S MANUAL __ Crossover Log Rear Log Middle Log Base Assembly UNPACKING A CAUTION Do not remove the metal data plates from the grate assembly The data plates contain important product in formation 1 Remove logs and heater base assem bly from carton Note Do not pick up heater base assembly by burners This could damage heater Always handle base assembly by grate 2 Rem

Desa CFS24NVC VS30N User's Manual

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