Desa GVB35N User's Manual
Contents
1. 2 Remove lower front access panel on heater 3 Disconnect burner tube from orifice holder see Figure 22 4 Remove pilot gas line from control valve see Figure 22 5 Disconnect wire connec tors from thermocouple interrupter see Figure 22 6 Remove thermocouple and thermocouple inter rupter from control valve 7 Remove cotter pin from control valve This releases the control rod from valve see Figure 22 8 Remove the two mounting screws from control valve mounting bracket see Figure 22 9 Remove assembly from the rear of heater 10 To reinstall reverse above steps Turn on gas to heater and check for gas leaks Apply a mixture of liquid soap and water to all joints Bubbles forming show a leak Correct all leaks at once Replace lower front access panel 1 ER A WARNING Turn off and unplug heater and let cool before servicing Unless you need gas supply for testing shut off manual shutoff valve before servicing Only a qualified service person should service and repair heater and venting system Control Rod Cotter Pin Control Valve Control Valve Bracket P gt Orifice si Holder Vel Thermocouple Interrupter Thermocouple Pilot Gas Line Wire Connector Figure 22 Removing Control Valve and Burner Tube 100353 2 SERVICE PROCEDURES Continued Removing Burner 1 Shut off gas supply to heater Remove2. Continued A WARNINGS continued 6 Provide the following minimum heater clearances from combustibles as viewed from the front of heater Front 48 inches Back 6 inches Top 53 inches Right Side 12 inches Left Side 6 inches 7 Do not run heater e where flammable liquids or vapors are used or stored e under dusty conditions 8 Never place clothing or any flammable objects on the heater or venting system 9 Heater and venting system surfaces are very hot during operation Keep children and adults away from hot surfaces to avoid burns or clothing ignition Carefully supervise young children when they are in the same room as heater Heater will remain hot for a time after shutdown Let surface cool before touching 10 Do not use heater as a cooking device 11 Do not alter heater or its controls Any change may create a safety hazard 12 Turn off heater and unplug if equipped with blower and let cool before servicing Unless you need gas supply for testing shut off manual shutoff valve before servicing Only a qualified service person should service and repair heater and venting system 13 Replace any safety screen or guard removed for servicing before running heater 14 Do not use heater if any part has been under water Immediately call a qualified service person to inspect the heater and to replace any part of the control system and any gas control which has been under water 100353
3. PRODUCT IDENTIFICATION Lower Front Access Panel Draft Hood Outlet for Venting System Control Valve Control Knob Button Figure 2 Vented Natural Gas Heater Rear View 100353 LOCAL CODES UNPACKING PRODUCT FEATURES INSTALLING HEATER Install and use heater with care Follow all local codes In the absence of local codes use the latest edition of the following e National Fuel Gas Code ANSI Z223 1 also known as NFPA 54 e National Electrical Code ANSI NFPA 70 e National Standard of Canada CAN1 B 149 Available from American National Standards Institute Inc 1430 Broadway New York NY 10018 National Fire Protection Association Inc Batterymarch Park Quincy MA 02269 Available from Standards Council of Canada 350 Sparks Street Ottawa Ontario K1R 7S8 1 Remove heater from carton 2 Remove all protective packaging applied to heater for shipment 3 Check heater for any shipping damage If heater is damaged promptly inform dealer where you bought heater Piezo Ignition System This heater has a piezo ignitor This system requires no matches batteries or other sources to light heater Thermostatic Heat Control This heater has a thermostat sensing bulb and a control valve This results in the greatest heating comfort This can also result in lower gas bills A WARNING A qualified service person must install heater and venting syst
4. On Position Off Position Figure 8 Manual Shutoff Valve Continued ontinue 100353 INSTALLING HEATER Continued INSTALLING GLASS PANEL 1 Locate the glass panel package inside the back of the heater A CAUTION Before installing glass panels inspect the edges If you notice any chips or cracks do not install If the surface on either side is deeply scratched do not install If these conditions exist contact your Vanguard dealer for replacement glass panels A CAUTION Do not operate heater without glass panels installed Operating heater without glass panels will damage front of heater due to excess temperatures A CAUTION Glass panels may have sharp edges Handle with care 2 Remove lower front access panel of heater by removing two screws at upper corners of panel The lower front access panel covers the lower front access area see Figure 9 3 Remove two screws on glass guard Remove glass guard see Figure 9 4 Carefully insert one glass panel up through lower front access area see Figure 10 page 15 5 Carefully slip glass panel behind hearth assembly see Figure 10 page 15 Glass Guard Lower Front Access Panel Figure 9 Removing Lower Front Access Panel 100353 INSTALLING HEATER Continued 6 Insert top edge of glass panel into the upper glass retaining channel see Figure 11 Low
5. S A Lock Joints Maintain Listed j Clearance of l Vent 53 5 6 Min Min Min Pe Vertical Vent Y lt 2 PE Ep Lock Joints Heater Heater Vent Connector Wi Y iwi Prefabricated or Ma Type B Vent sonry All Fuel Chimney Figure 5 Typical Construction of Venting Systems 100353 INSTALLING HEATER Continued CONNECTING TO GAS SUPPLY A WARNING A qualified service person must connect heater to gas supply Follow all local codes AA WARNING Never connect heater to private non utility gas wells This gas is commonly known as well head gas IMPORTANT Check gas line pressure at gas meter before connecting heater to gas line Gas line pressure must be no greater than 14 inches of water If gas line pressure is higher heater regulator damage could occur Gas Meter Figure 6 Connecting Heater to Utility Gas Line A CAUTION Use only new black iron or steel pipe Copper tubing may be used in certain areas Check your local codes Use pipe that is 1 2 in diameter or greater to allow proper gas volume to heater If pipe is too small undue loss of pressure will occur The gas supply line to you
6. TROUBLE SHOOTING Continued OBSERVED POSSIBLE PROBLEM CAUSE REMEDY Pilot lights but flame 1 Manual shutoff valve 1 Fully open manual shut goes out when not fully open off valve control knob is 2 Control knob not fully 2 Press in control knob released Control pressed in knob not pressed in long enough fully After pilot lights keep control knob pressed in 30 seconds 4 Safety interlock system 4 Wait one minute for has been triggered safety interlock system toreset Repeatignition 5 Thermocouple connec 5 Hand tighten until snug tion loose at control then tighten 1 4 turn valve more 6 Pilotflame nottouching 6 A Contact qualified thermocouple which service person to prop allows thermocouple to erly adjust pilot flame cool causing pilot B Contact local natural flame to go out This gas company problem could be C Clean pilot see caused by any or all of Cleaning and Mainte the following nance page 25 or A Improperly adjusted replace pilot assembly pilot flame B Low gas pressure C Dirty or partially clogged pilot 7 Thermocouple dam 7 Replace thermocouple aged 8 Control valve damaged 8 Replace control valve Burner does not light 1 Safety interlock system 1 Fully depress control after pilot is lit has been inadvertently knob in any position triggered other than pilot and re lease Wait one minute for safety interlock sys tem to reset Repeat ign
7. 9533 1 800 735 1268 Auer Steel amp Heating Supply 2935 W Silver Spring Dr Milwaukee WI 53209 414 463 1234 100353 ACCESSORIES Purchase these heater accessories from your local dealer If they can not supply these accessories either contact your nearest Parts Central see page 34 or call DESA International s Parts Department at 1 800 972 7879 You can also write to the address listed on the back page of this manual BLOWER KIT PART NUMBER GA6010 For all models Provides better heat distribution Makes heater more efficient Complete installation and operating instructions provided with blower MANUAL SHUTOFF VALVE GA5010 For all models Manual shutoff valve with 1 8 NPT tap 100353 ILLUSTRATED PARTS LIST Burner Assembly ot 50 Model JI El x S OS 35 Model EX 100353 PARTS LIST Burner Assembly This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Ordering Replacement Parts on page 34 of this manual PART NUMBER FOR NO GVB50N GVB35N 100206 02 098324 02 097159 02 098271 05 099974 02 100481 01 M11084 26 099986 01 100000 01 231939 M11084 38 099211 01 100207 01 098265 01 098936 02 100028 02 100307 01 099976 02 530988 100309 01 180245 100385 01 100090 01 100308 01 100467 01 100466 01 100468
8. Orifice Burner Tube S EH Orifice Holder Figure 24 Orifice Location 35 000 BTU Hr Burner Shown Figure 25 Orifice 100353 TECHNICAL SERVICE SPECIFICATIONS SERVICE HINTS You may have further questions about installation operation or troubleshooting If so contact DESA International s Technical Service Department at 1 800 323 5190 35 000 BTU Hr 50 000 BTU Hr Model Model BTU 35 000 50 000 Type Gas Natural Only Natural Only Ignition Piezo Piezo Pressure Regulator Setting 3 5 W C 3 5 W C Inlet Gas Pressure Maximum 7 W C 7 W C Minimum 5 W C 5 W C Dimensions Inches Heater H x W x D 25 x 27 4x 16 28 x 32 2x 16 Shipping Weight pounds 78 98 Flue Vent Size 4 dia 4 dia Orifice Size 34 drill 111 29 drill 136 Note These heaters are certified for elevations of 0 4500 feet above sea level For elevations above 2000 feet de rate heater 4 for each 1000 feet above sea level When gas pressure is too low e pilot will not stay lit e burner will have delayed ignition e heater will not produce specified heat When gas quality is bad e pilot will not stay lit e burner will produce yellow flames and soot e 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 100353 ORDERING REPLACEMENT PARTS PARTS CENTRALS Note Use only original replace
9. and crawl spaces If you install this heater in an area with other gas appliances you must total the BTU Hr input rating of all appliances Follow the National Fuel Gas Code NFPA 54 ANSI Z223 1 It lists fresh air requirements for fuel burning appliances IMPORTANT Do not provide openings for inlet or outlet air into attic if attic has a thermostat controlled power vent TT Chimney or Gas Ventilated Outlet 3 di E To Attic x To Crawl Space Inlet Ai r DUURUUDUURUUNI Ventilated ZE Crawl Space Figure 14 Ventilation Air from Outdoors 100353 FRESH AIR FOR COMBUSTION AND VENTILATION Continued Example 2 Locating Heater in Confined Closed Area NOTICE A confined area has an air volume of less than 50 cubic feet for each 1000 BTU Hr input rating of all appliances in the area cubic feet equals length x width x height of area Include adjoining rooms only if there are no doors between the rooms If you install this heater in a confined area you must provide additional fresh air Ventilating Confined Area This fresh air would come from an adjoining open area or outdoors A WARNING The adjoining open area must have enough fresh outside air ventilation to supply any appliance in that area plus the confined area Follow instructions under Example 1 Locating Heater in Un
10. approved for use with vented gas room heaters Do not use vent pipe smaller in diameter than that of the heater draft hood outlet Do not use dampers in the vent pipes Vertical height of vent must be greater than five feet above vent connection at draft hood 100353 INSTALLING HEATER Continued VENTING HEATER continued A WARNING Do not vent heater in any of the following ways see Figure 4 Heater must be vented to the out The vertical section of vent pipe must doors Never vent heater to another extend at least two feet above the room or inside a building highest point of any roof within ten feet Never extend vent pipe horizontally through a chimney or flue You must connect a vertical run of vent pipe to the horizontal run The vertical run must be at least 25 longer or five feet minimum than the horizontal run Never extend vent pipe horizontally through outside wall and terminate You must connect a vertical run of vent pipe to the horizontal run The vertical run must be at least 25 longer than the horizontal run Less than 5 between elbows Vertical run of pipe must be at least five feet from elbow to elbow Figure 4 Improper Venting Systems Continued E 100353 INSTALLING HEATER Continued VENTING HEATER continued Proper Size Vent To safely vent heater the vent connector pipe must be the same diameter as the
11. draft hood outlet on the rear of the heater Pipe that is too small can cause flue gas to spill from the heater Fasten vent connector to the draft hood outlet with a sheet metal screw Vent Types Prefabricated or Masonry All Fuel Chimney This is a masonry chimney or a residential type prefabricated chimney Only use prefabricated chimneys listed by Underwriters Laboratories UL Inc Type B Vent These vents are made of noncombustible corrosion resistant material They are certified by a nationally recognized testing agency Type B vents are double walled pipe Clearances to combustible construction must be in accordance with the listing of the particular type B vent Type B vents are currently listed as B 1 B 1 1 2 and B 2 The illustrations below show both vent types The illustration shows typical construction of each type of venting system Minimum clearances and lengths are added to the illustrations Terminate at least 5 above draft hood If vent extends over 5 above roof support with guy wires or braces Gees Seal Around Collar and Vent Cap Must Be At Least 2 Feet Above Highest Point Within 10 Feet oo Flashing E Ze Ad ri h Clearance of Vent S mee SH sy Position Support Firesto Support If A D Laterals Necessary
12. eet ae ae 6 Installing Heater pui sunnita thetic ation ee eee 6 Check Gas pericias acia cs 6 Installation tems edd NEEN treo 6 Locating Heater unci n eat ilaele Lia 7 Venting Heater EE 8 Connecting to Gas Supply 11 Checking Gas Connections iii 13 Installing Glass Panel 14 Fresh Air For Combustion and Venplaton cece eeeeeeeneees 16 Determining Fresh Air Flow for Heater Location Example 1 Locating Heater in Unconfined Open Area 17 Draft Hood Spillage Test 17 Providing Permanent Fresh Air Ventilation 18 Example 2 Locating Heater in Confined Closed Area 19 Ventilating Confined Area eeeceeeseeereeereeeneee 19 Operating Heater euros taci n 20 For Your Safety Read Before Lighting n 20 Lighting Instructions i 20 Manual Lighting Procedure crac connncnnnos 22 To Turn Off Gas To Appliance ii 22 Inspecting Pilot and Burner Flame i 23 Pilot Flame Pattern dii iis 23 Burner Flame Pattern nono nonn ei 23 Cleaning and Maintenance i 25 Troubleshooting cia alal 26 Service Procedures ilari rsa iaia ii ite 30 Removing Control Valve and Burner Tube 30 Removing Burner i 31 Changing Burner Orifice i 32 Fechnical Service s pica ida 33 Specifications unire ia Lana ica 33 Service OC 33 Ordering Replacemen
13. for spillage If spillage still occurs or there was no blockage you need more fresh outside air in the house You must provide additional fresh air ventilation Follow the steps below at once A Open a window near the appliance s at least two inches Test again for spillage If spillage does not stop open window more and retest If spillage stops keep window open while running appliance s Supply fresh outside air by a permanent method as soon as possible If spillage still occurs leave window open and go to next step B If you have a fireplace open a window or door near it at least two inches Test again for spillage If spillage does not stop open window or door more and retest If spillage stops keep window or door open while using fire place Supply fresh outside air by a permanent method as soon as possible If spillage still occurs leave window or door open and go to next step C If you have kitchen and bathroom exhaust fans turn them off Test again for spillage If spillage stops do not use exhaust fans Turn off circuit breakers for fans if possible Permanently supply fresh outside air as soon as possible Providing Permanent Fresh Air Ventilation If draft hood spillage occurs you must permanently supply fresh outside air to the inside of your house Provide extra fresh air by using ventilation grills or ducts Connect these items directly to the outdoors or spaces open to the outdoors These spaces include attics
14. lower front access panel on heater Disconnect burner tube from orifice holder see Figure 23 Remove orifice holder from burner see Figure 23 Remove pilot burner bracket nuts and remove pilot assembly see Figure 23 Move burner to the right for clearance Rotate burner 90 and remove burner through lower front access opening To reinstall reverse above steps Turn on gas to heater and check for gas leaks Apply a mixture of liquid soap and water to all joints Bubbles form ing show a leak Correct all leaks at once Replace lower front access panel Burner Burner Tube Pilot Burner Pilot Burner Assembly Bracket Nut Holder Figure 23 Removing Burner Tube Orifice Holder and Pilot Burner Assembly 35 000 BTU Hr Burner Shown Continued 100353 SERVICE PROCEDURES Continued Changing Burner Orifice 1 Shut off gas supply to heater 2 Remove lower front access panel on heater 3 Disconnect burner tube from orifice holder see Figure 24 4 Remove orifice holder from burner see Figure 24 5 Use socket or open end wrench to remove the old orifice from the orifice holder 6 Clean and replace orifice or replace with new orifice 7 Turn on gas to heater and check for gas leaks Apply a mixture of liquid soap and water to all joints Bubbles forming show a leak Correct all leaks at once 8 Replace lower front access panel Burner
15. moisture and contaminants This keeps them from going into heater controls If sediment trap is not installed or is installed wrong heater may not run properly IMPORTANT Use two pipe wrenches when connecting gas piping to gas control valve of heater This will prevent turning or damaging control valve Acceptable construction of inlet gas line be From Gas Meter 5 W C Min to 7 Manual W C Max Shutoff Valve Preferred construction of inlet gas Reducer Bushing to 1 8 NPT Test Gauge 1 8 NPT e Connection Plug Tap ui 5 Tee Joint W C Sediment wae Maio Trap 7 W C L Cap Max Figure 7 Gas Connection An A G A design certified manual shutoff valve with 1 8 NPT tap is an acceptable alternative to test gauge connection Purchase the optional A G A design certified manual shutoff valve from your dealer See Accessories page 35 For purposes of input adjustment 100353 INSTALLING HEATER Continued CHECKING GAS CONNECTIONS Pressure Testing Gas Supply Piping System Test Pressures In Excess of 1 2 PSIG IR 2 3 4 Xi Test Pressures Equal To or Less Than 1 2 PSIG 1 2 3 4 Pressure Testing Heater Gas Connections 1 A 2 Open main gas valve located on or near gas meter ES 4 Check all joints from manual shutoff valve to control valve on heater Apply A WARNING Test all gas piping and connections for leaks a
16. the right side and 6 inches from the left side and back of heater directly on carpeting tile or other combustible materials other than wood flooring Place heater on metal or wood panel extending the full width and depth of heater as a fireplace insert e in high traffic areas e in windy or drafty areas A CAUTION If you install the heater in a home garage e heater pilot and burner must be at least 18 inches above floor locate heater where moving vehicle will not hit it For convenience and efficiency install heater e where there is easy access for operation inspection and service e in coldest part of room e near an electrical outlet if you are planning to add blower to heater See Accessories page 35 for blower CEILING lo e Minimum 53 Minimum ae Left Side 6 Minimum in from Back Mmm Him Wu 12 pl Minimum gt 48 Minimum from Front of Heater Figure 3 Heater Clearances Continued 100353 INSTALLING HEATER Continued VENTING HEATER Note Venting chimney materials are not supplied with heater A WARNING A qualified service person must install the venting system for this heater If venting system is not properly installed and maintained the vent safety shut off system will pre vent the heater from running Follow all local codes A WARNING This heater has a vent safety shut off syste
17. through burner com bustion Heater produces un 1 Heater burning vapors 1 Ventilate room Stop us wanted odors from paint hair spray ing odor causing prod glues etc ucts while heater is run ning 2 Gas leak See Warn 2 Find and correct all ing statement at top leaks see Checking Gas of page Connections page 13 Heater shuts off in use 1 Heater not venting cor 1 Check venting system rectly Vent safety If damaged or blocked switch shuts off heater repair If venting system is OK have qualified service person replace vent safety switch wire harness or thermo couple interrupter 2 Low line pressure 2 Contact local natural gas company 3 Pilot partially clogged 3 Clean pilot see Clean ing and Maintenance page 25 Gas odor even when 1 Gas leak See Warn 1 Find and correct all control knob is in OFF ing statement at leaks see Checking Gas position top of page Connections page 13 2 Control valve damaged 2 Replace control valve Gas odor during com 1 Foreign matter be 1 Take apart gas tubing bustion tween control valve and and remove foreign mat burner ter 2 Gas leak See Warn 2 Find and correct all ing statement at leaks see Checking Gas top of page Connections page 13 3 Foreign fumes in area 3 Ventilate area around heater to remove any foreign fumes 100353 SERVICE PROCEDURES Removing Control Valve and Burner Tube 1 Shut off gas supply to heater
18. 01 100465 01 101342 05 098249 01 530192 098304 01 100206 01 098324 02 097159 02 098271 05 099974 01 063015 M11084 26 099986 01 100000 01 231940 M11084 38 099211 01 100207 01 098265 01 098936 02 100028 02 100307 01 099976 02 530988 100309 01 180233 100384 01 100090 01 100308 01 100467 01 100466 01 100468 01 100465 01 101342 04 098249 01 530192 098304 01 DESCRIPTION an Combustion Chamber Control Knob Piezo Ignitor Ignitor Cable Control Rod Limit Switch Bracket Screw 10 16 x 3 8 Screw 10 16 x 3 8 Wire Assembly Cotter Pin Limit Switch Screw 8 18 x 3 8 Screw 8 18 x 3 8 Screw 10 16 x 2 1 2 Control Valve Elbow Thermocouple Interrupter Pilot Tubing Thermocouple Burner Tube Control Bracket Orifice Holder Orifice Burner Assembly Burner Bracket Pilot Assembly Pilot Sleeve Pilot Nut Pilot Electrode Nut Electrode Glass Panel Package includes bottom glass retainer Nut M5 x 0 8 Glass Spring Screw 10 24 x 3 8 i nm nm nm nt ech zb aaa a a ar DI Sei Sch na ech GO NNI 100353 ILLUSTRATED PARTS LIST Cabinet Assembly KEY NO This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Ordering Replacement Parts on page 34 of this manual 6 GVB50N GVB35N DESCRIPTION 100202 02 098304 01 100053 02BR 100204 02 098304 02 M11084 26 10020
19. 2 7441 1 800 362 6951 FBD 601 Hope Street Bowling Green KY 42101 502 796 8406 800 654 8534 American Air Dist 537 W 62nd Street Shreveport LA 71108 318 861 0634 Master Service Center 1184 Wilson Grand Rapids MI 49504 616 791 4760 800 446 1446 Washer Equipment Co 1715 Main Street Kansas City MO 64108 KS MO AR 816 842 3911 Controls Inc 6820 Glenwood Ave Raleigh NC 27612 NC SC VA MD 919 787 2242 1 800 334 5886 Taratin Tank Co P O Box 6129 Freehold NJ 07728 908 780 9340 800 922 0724 East Coast Energy 707 Broadway W Long Branch NJ 07764 908 870 8809 1 800 755 8809 ATP Services 990 Avenue of Americas New York NY 10018 212 967 6255 Dayton Hardware P O Box 275 North Dayton Station Dayton OH 45404 All States 513 258 3721 OH only 1 800 762 3426 Central Air Supply 424 North Rockwell Oklahoma City OK 73127 405 495 0014 Warmer Image Halco Enterprises 208 Carter Dr Unit 21 West Chester PA 19382 215 696 2670 1 800 368 0803 LaPorte s Parts amp Service 2444 North 5th Street Hartsville SC 29550 803 879 3009 Cans Unlimited Inc P O Box 645 Taylor SC 29687 All States 803 879 3009 1 800 845 5301 Dealers LP Equip Co P O Box 341145 Bartlett TN 38184 Al TN 901 386 8780 800 428 8902 Capitol Hydronic Supply 104 West Jefferson Street Falls Church VA 22046 703 416 8555 Tuco Industrial Products P O Box 5076 Lynwood WA 98046 206 743
20. 5 02BR 100203 02 099123 01 100101 02BS 099997 01 100202 01 098304 01 100053 01BR 100204 01 098304 02 M11084 26 100205 01BR 100203 01 099123 01 100101 01BS 099997 01 Lower Front Panel Screw 4410 16 x 3 8 Hearth Assembly includes items 5 8 7 Top Panel Screw 46 20 x 3 8 Screw 10 16 x 3 8 Screw 10 16 x 3 8 Glass Guard Cabinet Assembly Thermobulb Clip Cabinet Back Switch Plug PARTS AVAILABLE NOT SHOWN 099988 01 100157 01 099987 01 100154 01 099988 01 100157 01 099987 01 100154 01 Lighting Instructions Decal English Lighting Instructions Decal French Control Position Decal Warning Decal 100353 NOTES 100353 WARRANTY INFORMATION 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 VANGUARD VENTED NATURAL GAS HEATERS LIMITED ONE YEAR WARRANTY This DESA product is warranted to the original purchaser to be free from defect in material and workmanship under normal use and maintenance for a period of one year from the date of installation whether or not actual use begins on that date It is the responsibili
21. If operating heater for the first time a slight odor will occur This odor will go away after a few hours of operation Ba FOR YOUR SAFETY READ BEFORE LIGHTING NA A WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage per sonal 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 e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions e If you cannot reach your gas supplier 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 under water REN mu er ue RE STOP
22. Read the safety information above If heater is equipped with a blower turn off all electric power to the heater Make sure manual shutoff valve is fully open Locate control knob on top of heater Fully depress control knob in any position other than PILOT to shut off burner and pilot IES DEPRESS FOR OFF Ignitor Button APPUYER POUR PILOT H Control Knob ARRETER VEILLEUSE og e 7 E Figure 16 Control Knob and Ignitor Button 100353 OPERATING HEATER Continued 10 11 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 information at the top of page 20 If you don t smell gas go to the next step Turn control knob clockwise aw to the PILOT position Fully depress control knob for five seconds Note You may be running this heater for the first time after hooking up to gas supply If so you may need to depress control knob in for 15 seconds or more This allows air to bleed from the gas system With control knob depressed push down and release ignitor button This will light pilot The pilot is attached to the front of burner You can see pilot through front glass of heater see Figure 17 If needed keep pressing ignitor button until pilot lights Note If pilot does not stay lit refer to Troubleshooting pages 25 through 29 Also contact a qualified service person or gas supplier for repairs Until rep
23. VANGUARD VENTED NATURAL GAS HEATERS OWNER S OPERATION AND INSTALLATION MANUAL Models GVB35N and GVB50N WARNING If the information in this manual is not followed exactly a fire or explosion may result causing property damage per sonal injury or loss of life FOR YOUR SAFETY 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 e Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your building e Immediately call your gas supplier from a neighbor s phone Follow the gas suppliers instructions e If you cannot reach your gas supplier call the fire department Installation and service must be per formed by a qualified installer service agency or the gas supplier WARNING Improper installation adjustment alteration service or maintenance can cause property damage personal injury or loss of life Refer to this manual for cor rect installation and operational procedures For assistance or additional information consult a qualified installer service agency or the gas supplier Save this manual for future reference CONTENTS SECTION PAGE Safety Information sc i ciale 3 ProducetIdentificationi s iisaciie iii ie lalla 5 Local Codes suecia 6 Unpacking oani iaae aise NA eee ee esl eee lee dele 6 Product Reatures mica eine
24. airs are made light pilot with match To light pilot with match see Manual Lighting Procedure page 22 Keep control knob depressed for 30 seconds after lighting pilot After 30 seconds release control knob If control knob does not pop up when released contact a qualified service person or gas supplier for repairs Shut off gas immediately Note If pilot goes out repeat steps 4 through 8 If heater is equipped with a blower turn on all electrical power to the heater Turn control knob counterclockwise 47 N to desired setting If equipped turn blower control to the AUTO or ON position if desired A CAUTION Do not try to adjust heating levels by using the manual shutoff valve Figure 17 Viewing Pilot Continued 100353 OPERATING HEATER Continued E MANUAL LIGHTING PROCEDURE SA Remove lower front access panel on heater Locate pilot Pilot is attached to the front of burner With control knob depressed strike match Hold match to pilot until pilot lights 1 2 3 Follow steps 1 through 6 under Lighting Instructions pages 20 and 21 4 5 Follow steps 8 through 11 under Lighting Instructions page 21 MO To TURN OFF GAS To APPLIANCE MS Shutting Off Heater 1 Fully depress control knob in any position other than PILOT to shut off burner and pilot 2 If equipped turn blower control to OFF position Shutting Off Burner Only pilot stays lit 1 T
25. burner you must remove the burner from heater See Service Procedures page 31 to remove burner After removing burner blow inside of combustion chamber clean with compressed air Clean burner with a soft bristled brush Blow soot from burner with compressed air PILOT Use a vacuum cleaner compressed air or small soft bristled brush to clean BURNER ORIFICE Use a vacuum cleaner compressed air or small soft bristled brush to clean You can also use a tooth pick to clean orifice Do not enlarge or damage orifice hole PILOT AND BURNER FLAME Check the pilot and burner flame monthly Make sure pilot and burner flame is burning correctly See Inspecting Pilot and Burner Flame page 23 VENTING SYSTEM Check the venting system at least once a year Make sure joints are secure and vent pipe is in good condition Do not obstruct combustion and ventilation air entering the rear of heater 100353 TROUBLE SHOOTING Note All troubleshooting items are listed in order of operation A WARNING system Turn off and unplug heater and let cool before servicing Unless you need gas supply for testing shut off manual shutoff valve before servicing Only a qualified service person should service and repair heater and venting A CAUTION Never use a wire needle or similar object to clean pilot This can damage pilot OBSERVED POSSIBLE PROBLEM CAUSE REMEDY Whenignitorbuttonis 1 Inco
26. confined Open Area page 17 to make sure fresh air ventilation is adequate When ventilating to an adjoining open area 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 areas Follow the National Fuel Gas Code NFPA 54 ANSI 2223 1 It lists fresh air requirements for fuel burning appliances IN II n ii Ventilation Grills Connecting Two Rooms Ventilation to Meet Unconfined Space Grills into Closet for Hot Water Heater O 12 Recommended Fresh Air Duct into Crawl Space in Furnace Area or in Closet with Water Heater Figure 15 Ventilation Air from Inside Building After providing ventilation between rooms check for draft hood spillage see Draft Hood Spillage Test page 17 If draft hood spillage still occurs provide more ventilation between rooms or provide permanent ventilation from outdoors See Providing Permanent Fresh Air Ventilation page 18 100353 OPERATING HEATER A WARNING Heater and venting system surfaces are very hot during operation Keep children and adults away from hot surfaces to avoid burns and clothing ignition Carefully supervise young children when they are in the same room as heater Heater will remain hot for a time after shut down Let surface cool before touching NOTICE
27. ed service person must install heater and venting system 2 Use only natural gas Do not convert heater to use different fuel type 3 If you smell gas e 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 e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions e If you cannot reach your gas supplier call the fire department 4 This heater must have fresh air for proper operation If not poor fuel combustion and improper venting of flue gases will result Carbon monoxide poisoning from backed up flue gases could occur The State of California lists carbon monoxide as areproductive toxin under Proposition 65 Read the instructions under Fresh Air for Combustion and Ventilation pages 16 through 19 for complete information 5 Never install the heater e in a mobile home or a recreational vehicle e where curtains furniture clothing or other flammable objects are less than 48 inches from the front 53 inches from top or 12 inches from right side and 6 inches from left side and back of heater directly on carpeting tile or other combustible materials other than wood flooring Place heater on metal or wood panel extending the full width and depth of heater e as a fireplace insert e in high traffic areas e in windy or drafty areas Continued 100353 SAFETY INFORMATION
28. em Have them inspect heater before use and at least annually Follow all local codes NOTICE This heater must be electrically grounded if equipped with blower Follow all local codes In the absence of local codes follow the National Electric Code ANSI NFPA 70 U S or Canadian Electrical Code CSA C22 1 Canada CHECK GAS TYPE Use only natural gas If your gas supply is not natural gas do not install heater Call dealer where you bought heater for proper type heater INSTALLATION ITEMS Before installing heater make sure you have all items below e piping check local codes e sediment trap e sealant resistant to propane gas e tee joint e manual shutoff valve e pipe wrench e ground joint union venting materials e test gauge connection see Figure 7 page 12 An A G A design certified manual shutoff valve with 1 8 NPT tap is an acceptable alternative to test gauge connection Purchase the optional A G A design certified manual shutoff valve from your dealer See Accessories page 35 100353 INSTALLING LOCATING HEATER HEATER A WARNING Continued Maintain the minimum clearances shown in Figure 3 below If you can provide greater clearances A WARNING Never install the heater in a mobile home or a recreational vehicle where curtains furniture clothing or other flammable objects are less than 48 inches from the front 53 inches from the top 12 inches from
29. er Front Access Area Figure 10 Inserting Glass Panels Hearth Assembly A CAUTION Make sure you insert top edge of glass panels into the upper glass retaining channel Do not install glass panels with top edge of glass in front of the upper glass retaining channel Glass panels will not automatically go into the channel You must guide the glass panels into it Incorrect installation will damage front of heater due to excess temperatures 7 Lower glass into lower glass retaining channel see Figure 12 Slide glass panel all the way to Note If you have chipped or cracked a glass panel during installation do not the left side use Contact your Vanguard dealer for a replacement glass panel 8 Repeat steps 4 through 7 for all glass panels 9 Reinstall glass guard Reinstall lower front access panel of heater Upper Glass Retaining Channel Lower Glass Retaining Channel 14 Glass Panel Lea Lower Front Access Area Figure 11 Inserting Top Edge of l Glass Panel into Upper Glass Retaining Channel Glass Panel Lower Glass Retaining Channel sa Figure 12 Inserting Glass into d Lower Retaining Channel 100353 FRESH AIR FOR COMBUSTION AND VENTILATION A WARNING This heater must have fresh air for proper operation If not poor fuel combustion and improper ventin
30. fter install ing or servicing Correct 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 Disconnect heater and its individual manual shutoff valve from gas supply pipe Pressures in excess of 1 2 PSIG will damage heater regulator Cap off open end of gas pipe where manual shutoff valve was connected Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter Check all joints of gas supply piping system Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak Correct all leaks at once Close manual shutoff valve see Figure 8 Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter Check all joints from propane supply tank to manual shutoff valve Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak Correct all leaks at once Open manual shutoff valve see Figure 8 Make sure control knob of heater is in the OFF position mixture of liquid soap and water to gas joints Bubbles forming show a leak Correct all leaks at once Light heater see Operating Heater pages 20 through 22 Check the rest of the internal joints for leaks Turn off heater see To Turn Off Gas to Appliance page 22 t
31. g of flue gases will result Carbon monoxide poisoning from backed up flue gases could occur 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 want their homes as airtight as possible While it is good to make your home energy efficient it is not good to make it too airtight Your home needs to breath If your home is too airtight fresh air has little chance of entering in This could be dangerous if you have fuel burning appliances These appliances need fresh outside air for proper combustion and ventilation Exhaust fans fireplaces clothes dryers and fuel burning appliances draw air from the house to operate This heater is a fuel burning appliance It uses air from inside the house for combustion It also uses this air as a draft for venting This draft air helps move combustion gases through the vent pipe to the outdoors If your house is too airtight there is not enough fresh air for these items to use Fresh air may draw back into the house through venting flues and chimneys This will keep fuel burning appliances from venting properly This may cause them to relea
32. i tion 2 Burner orifice is 2 Clean burner see Clean clogged ing and Maintenance page 25 or replace burner orifice 3 Burner orifice diameter 3 Replace burner orifice is too small 4 Inlet gas pressure is too 4 Contact local natural low gas company Delayed ignition of 1 Manifold pressure is too 1 Contact local natural burke low WW gas company 2 Burner orifice is 2 Clean burner see clogged Cleaning and Mainte nance page 25 or re place burner orifice Continued ontinue 100353 TROUBLE SHOOTING Continued OBSERVED POSSIBLE PROBLEM CAUSE REMEDY Burner backfiring 1 Burner orifice is 1 Clean burner see Clean during combustion clogged or damaged ing and Maintenance page 25 or replace burner orifice 2 Burner damaged 2 Replace burner 3 Gas regulator defective 3 Replace control valve 4 Delayed ignition 4 See above Yellow flame during 1 Not enough air 1 Check burner for dirt and burner combustion debris If found clean burner see Cleaning and Maintenance page 25 2 Gas regulator defective 2 Replace control valve Slight smoke or odor 1 Residues from manu 1 Problem will stop after a during initial operation facturing processes few hours of operation Burner fails to 1 Pilot flame not lit 1 Light pilot burner see respond to thermo Lighting Instructions stat page 20 2 Pilot flame not properly 2 Pilot flame needs adju
33. le 1 Close all windows and doors 2 If you have a fireplace start a fire Build fire until flames are burning strongly 3 Turn on all exhaust fans These include exhaust fans for kitchen bathroom water heaters gas or electric etc 4 Turn on all vented gas appliances These include any room heaters water heaters clothes dryer etc 5 Wait ten minutes for drafts to regulate 6 Check for draft hood spillage at each vented gas appliance Do this by holding a lit match two inches from the draft opening see Figure 13 If match flame pulls toward the draft hood there is no spillage If match flame blows away from the draft hood there is spillage This is a hazardous condition See Draft Hood Spillage page 18 Vent Pipe Vent Pipe Draft Hood Match Heater Typical A Match Water Heater Draft Hood Opening Figure 13 Checking for Draft Spillage No Draft Hood Spillage This shows there is enough fresh air in area for appliances Turn off all exhaust fans and appliances if desired Continued 100353 FRESH AIR FOR COMBUSTION AND VENTILATION Continued Draft Hood Spillage This is a hazardous situation Draft hood spillage re leases poisonous carbon monoxide gas into your home A DANGER Carbon monoxide poisoning may lead to death If draft hood spillage occurs check for blocked flue connectors vent pipes and chimneys If you find blockage remove Test again
34. m This system shuts off the heater gas supply if you do not vent heater properly or the venting system is blocked Do not operate heater if not properly vented Do not tamper with the vent safety shut off system Carbon monoxide poison ing and death may result A WARNING When venting this heater follow the safety information listed below Never vent heater to another room or inside a build ing Only vent heater to the outdoors Do not vent heater exhaust to a chimney or flue serving another solid fuel burning or gas appliance We recommend you use flues classified as prefabri cated or masonry all fuel chimney or type B vent See Vent Types page 10 If using old vent check vent for soot creosote and loose particles If vent is damaged repair or replace it before using heater Extend the vertical section of vent pipe at least three feet above roof penetration Extend the vertical section of vent pipe at least two feet above the highest point of any roof within ten feet The horizontal run of vent pipe should rise at least 1 4 inch for each foot of run Support the vent pipe at least every five feet along its length Do not use combustible materials to support vent pipe Never extend vent pipe horizontally through outside wall and terminate You must connect a vertical run of vent pipe to the horizontal run The vertical run must be at least 25 longer than the horizontal run Install vent or chimney cap that is
35. ment parts This will protect your warranty cover age for parts replaced under warranty Parts Under Warranty Contact Vanguard dealer or call DESA International s Technical Service Depart ment at 1 800 323 5190 When calling DESA International have ready e your name your address e model number of your heater e how heater was malfunctioning type of gas used propane or natural gas e purchase date Usually we will ask you to return the defective part to the factory Parts Not Under Warranty Contact Vanguard dealer If they can t supply original replacement part s either contact your nearest Parts Central below or call DESA International s Parts Department at 1 800 972 7879 When calling DESA International have ready e model number of your heater e the replacement part number These Parts Centrals are privately owned businesses They have agreed to support our customer s needs by providing original replacement parts and accessories For certain parts some Parts Centrals may refer you to a dealer in your area When calling a Parts Central ask for the Parts Department Howard Industries 1514 South Maple Ave Los Angeles CA 90015 213 747 5121 Victor Manufacturing 42 Rumsey Road E Hartford CT 06108 NY NJ DE PA MD 203 289 4223 Controlled Engineering 299 Roosevelt Road Glen Ellyn IL 60137 708 469 7300 Portable Heater Parts 342 N County Rd 400E Valparaiso IN 46383 All States 219 46
36. outside the Continental U S A Alaska and Canada 10 DESA products whose serial number has been altered defaced or removed 11 Fuel or electricity costs or increases in such costs from any reason whatsoever 12 Any special indirect or consequential property economic or commercial damage of any nature whatsoever Some states do not allow the exclusion of incidental or consequential damages so the above limitation may not apply to you No representative dealer or other person is authorized to assume for DESA International any additional different or other liability in connection with the sale of this DESA product This warranty gives you specific legal rights and you may also have other rights which vary from state to state For more information about this warranty write DESA INTERNATIONAL 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 100353 01 REV C 6 94
37. plied warranties of merchantability are hereby limited in duration to the period for which each limited warranty is given Some states do not allow limitations on how long an implied warranty lasts so the above limitations may not apply to you The expressed warranties made in this warranty are exclusive and may not be altered enlarged or changed by any distributor dealer or other person whomsoever DESA WILL NOT BE RESPONSIBLE FOR 1 Normal maintenance as outlined in the owner s operation and installation manual including cleaning of component parts such as orifices and burners 2 Failure to start and or operate due to voltage or gas condition blown fuses open circuit breakers loose or disconnected wires low gas pressure or other damages due to inadequacy or interruption of electrical service or gas supply Damage or repairs required as a consequence of faulty or incorrect installation not in conformance with DESA instructions Damage as a result of floods winds lightning accidents corrosive atmosphere or other conditions beyond the control of DESA Parts or accessories not supplied by DESA Costs incurred in gaining access to the heater Damage or repairs needed as a consequence of any misapplication abuse unreasonable use unauthorized alteration improper servicing improper operation or failure to provide reasonable and necessary maintenance 8 Freight charges incurred from parts replacement 9 DESA product installed
38. r heater must be 1 2 inch in diameter or larger If the supply line branches to serve two or more heaters the line from the branch back to the gas meter must be doubled or tripled etc in size depending upon the number of heaters Example for 1 2 inch diameter supply line If the supply line branches to serve two heaters the line diameter from the branch back to the gas meter must be at least inch If three heaters are served the line diameter from the branch back to the gas meter must be at least 1 1 2 inches Note If gas supply line total length exceeds forty feet use a larger diameter pipe Use pipe that is the next size larger than the heater control valve fitting Continued 100353 INSTALLING HEATER Continued Installation must include a manual shutoff valve ground joint union plugged 1 8 NPT tap and a sediment trap Locate NPT tap within reach for test gauge hook up NPT tap must be upstream from heater see Figure 7 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 sealant that is resistant to liquid petro leum LP gas Install sediment trap in supply line as shown in Figure 7 Locate sediment trap where it is within reach for cleaning Locate sediment trap where trapped matter is not likely to freeze A sediment trap traps
39. rrect spark gap Adjust spark gap to 1 16 pressed there is no spark at pilot 2 Ignitor electrode posi tioned wrong Ignitor electrode broken Ignitor electrode not con nected to ignitor cable Ignitor cable pinched or wet Piezo ignitor nut is loose Broken or frayed ignitor cable Loose ignitor cable Bad piezo ignitor 2 Replace ignitor Replace ignitor Reconnect ignitor cable Free ignitor cable if Tighten nut holding piezo Replace ignitor cable Reconnect ignitor cable Replace piezo ignitor pinched by any metal or tubing Keep ignitor cable dry ignitor to heater cabinet Nut is located inside heater cabinet at top When ignitor button is pressed there is spark at pilot but no igni tion Gas supply turned off or manual shutoff valve closed Control knob not in PI LOT position Control knob not pressed in while in PILOT posi tion Air in gas lines when in stalled Pilot is clogged Gas regulator setting is not correct Turn on gas supply or Turn control knob to PI Press in control knob Continue holding down Clean pilot see Cleaning Replace control valve open manual shutoff valve LOT position while in PILOT position control knob Repeat ig niting operation until air is removed and Maintenance page 25 or replace pilot as sembly 100353
40. se poison ous carbon monoxide gas into your home It is very important to provide enough fresh air to run all fuel burning appliances A DANGER Carbon monoxide poisoning may lead to death Carbon monoxide is a colorless odorless gas Early signs of carbon monoxide poisoning resemble the flu with headaches dizziness and or nausea If you have these signs the heater may not be operating or venting properly Get fresh air at once Have heater or heater venting system serviced Some people are more affected by carbon monoxide than others These include pregnant women persons with heart and lung disease and anemia those under the influence of alcohol and those at high altitudes 100353 FRESH AIR FOR DETERMINING FRESH AIR FLOW FOR HEATER LOCATION COMBUSTION Example 1 Locating Heater in Unconfined Open Area AND NOTICE VENTILATION An unconfined area has a minimum air volume of 50 cubic feet for each 1000 BTU Hr input rating of all appliances in the area cubic feet equals length x width x height of area Include adjoining rooms only if there are no doors between the rooms or if you add ventila tion grills between the rooms see Ventilating Confined Area page 19 Continued In an open area the air that leaks around doors and windows may provide enough fresh air for combustion and ventilation Draft Hood Spillage Test Follow the steps below to see if enough fresh air is availab
41. st heating end of thermo ing Contact a qualified couple service person 3 Pilot burner orifice 3 Clean pilot burner see clogged or damaged Cleaning and Mainte nance page 25 4 Control valve defec 4 Replace control valve tive 5 Temperature at thermo stat bulb satisfied Heater produces a 1 Air in gas line 1 Operate burner until air is whistling noise when removed from line Have burner is lit gas line checked by local natural gas company 2 Air passageways on 2 Observe minimum instal heater blocked lation clearances see Figure 3 page 7 3 Dirty or partially 3 Clean burner see Clean clogged burner orifice ing and Maintenance page 25 or replace burner orifice 100353 TROUBLE SHOOTING Continued A WARNING If you smell gas e Shut off gas supply Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your building e 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 clicking ticking noise just after burner is lit or shut off heating or contracting while cooling OBSERVED POSSIBLE PROBLEM CAUSE REMEDY Heater produces a 1 Metal expanding while 1 This is common with most heaters If noise is excessive contact quali fied service person of heater being drawn
42. t Darts 34 Parts CentralS ccii iure perseen eee a eieae a alicia 34 e EE 35 Illustrated Parts List eege ail 36 38 Warranty Information nono noconocnocanccnnncnnncnnnos Back Cover 100353 SAFETY INFORMATION A WARNINGS IMPORTANT Read this owner s manual carefully and completely be fore trying to assemble operate or service this heater Improper use of this heater can cause serious injury or death from burns fire explosion electrical shock and carbon monoxide poisoning A DANGER Carbon monoxide poisoning may lead to death Carbon Monoxide Poisoning Early signs of carbon monoxide poisoning resemble the flu with headaches dizziness or nausea If you have these signs the heater may not be operating or venting properly Get fresh air at once Have heater or heater venting system serviced Some people are more affected by carbon monoxide than others These include pregnant women people with heart or lung disease or anemia those under the influence of alcohol and those at high altitudes Natural Gas Natural gas is odorless An odor making agent is added to natural gas The odor helps you detect a natural gas leak However the odor added to natural gas can fade Natural gas may be present even though no odor exists Make certain you read and understand all Warnings Keep this manual for reference It is your guide to safe and proper operation of this heater 1 A qualifi
43. tinued Sharp Blue Flame Ei di Figure 20 Correct Burner Flame Pattern High Yellow Flame n MAAAAAAMAAAAAAA Hm A MM A A e AAC MOI Burner Figure 21 Incorrect Burner Flame Patterns If burner flame pattern is incorrect as shown in Figure 21 e turn heater off see To Turn Off Gas to Appliance page 22 e see Troubleshooting pages 26 through 29 100353 CLEANING AND MAINTENANCE A WARNING Turn off heater and let cool before cleaning or servicing A WARNING Keep heater clear and free from combustible materials gasoline and other flammable vapors and liquids AA CAUTION You must keep control areas burner and circulating air passageways of heater clean Inspect these areas of heater before each use Have heater and venting system inspected yearly by a qualified service person Heater may need more frequent cleaning due to excessive lint from carpeting bedding material etc CABINET Air Passageways e Use a vacuum cleaner or pressurized air to clean Exterior e Use a soft cloth dampened with a mild soap and water mixture Wipe the cabinet to remove dust COMBUSTION CHAMBER AND BURNER Clean the combustion chamber and burner if you have run the heater with a high yellow flame Incomplete combustion from lack of air causes the yellow flame This will deposit soot inside the combustion chamber and on the burner To clean combustion chamber and
44. ty of the consumer owner to establish the warranty period You are required to furnish proof of installation date which may be a Bill of Sales or other payment record which verifies the original installation A new or remanufactured part to replace any defective part will be provided at DESA s sole option without charge for the part itself FOB the shipping point The exchanged part will be warranted for only the unexpired portion of the original warranty Defective parts must be returned to DESA transportation charges prepaid DESA is notresponsible for any freight charges where DESA will establish to its sole satisfaction that the part was or became defective under normal use and maintenance This warranty provides a labor allowance to restore the product to proper operating condition No reimbursement will be made for transportation diagnostics shipping handling or other incidental expenses This warranty applies only to the product in its original installation location and is voided if the product is reinstalled elsewhere LIMITED FOUR YEAR WARRANTY ON COMBUSTION CHAMBER During the second through fifth years after the date of original installation DESA further warrants the combustion chamber against defects in material and workmanship under normal use and maintenance A replacement combustion chamber will be provided under the same conditions as stated in the one year warranty LIMITATION OF WARRANTIES All implied warranties including im
45. urn control knob to the PILOT position At this setting only the pilot remains lit 100353 INSPECTING PILOT AND BURNER FLAME Check pilot flame pattern and burner flame pattern often PILOT FLAME PATTERN Figure 18 shows a correct pilot flame pattern Figure 19 shows an incorrect pilot flame pattern The incorrect pilot flame is not touching the thermocouple This will prevent the thermocouple from getting hot causing the heater to shut down Figure 18 Correct Pilot Figure 19 Incorrect Flame Pattern Pilot Flame Pattern If pilot flame pattern is incorrect as shown in Figure 19 e turn heater off see To Turn Off Gas to Appliance page 22 e contact a qualified service person BURNER FLAME PATTERN Note To view burner flame look through front glass of heater Figure 20 page 24 shows a correct burner flame pattern Figure 21 page 24 shows two incorrect burner flame patterns One incorrect flame pattern shows high yellow flames and the other shows flames lifting off of burner A WARNING If high yellow flame occurs your heater could produce increased levels of carbon monoxide If burner flame is incorrect follow instructions on page 24 NOTICE Do not mistake orange flames with yellow flame Dirt or other fine dust particles enter the heater and burn causing brief patches of orange flame Continued 100353 INSPECTING PILOT AND BURNER FLAME Con
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