Vanguard Heating VN1800ITB User's Manual
Contents
1. Take apart gas tubing and remove for eign matter Locate and correct all leaks see Check ing Gas Connections page 11 Moisture condensation noticed on windows 104246 Not enough combustion ventilation air www desatech com 17 Refer to Fresh Air for Combustion and Ventilation requirements page 4 FREE NATURAL GAS HEATER ILLUSTRATED PARTS 21 14 BREAKDOWN VN1800ITB O gg O VENT 104246 18 OWNER S MANUAL PA RT S LI ST This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 22 of this manual VN1800ITB PART NUMBER DESCRIPTION 098304 01 Screw 10 x 3 8 098742 13 Front Panel 098238 06 Grill Guard 101108 01 Clip Grill Guard 098198 03 Apron M11084 26 Screw 10 x 3 8 098462 01 Control Rod Assembly 098457 01 Reflector Assembly 099415 08 Regulator M11084 38 Screw 8 x 3 8 104617 01 Cabinet Assembly 098324 01 Control Knob 098325 01 Roll Pin 097159 04 Piezo Ignitor 100537 02 Regulator Bracket 098522 16 Thermostat Gas Valve 098271 03 Ignitor Cable 104224 01 SIT Tube 104197 01 Inlet Tube 099211 01 Hex Head Screw See Detail Burner Assembly 099218 01 Burner 098508 01 Valve Retainer Nu2. 098522 16 Thermostat Gas Valve 098271 03 Cable Ignitor 104224 01 SIT Tubing 104197 01 Inlet Tubing 099211 01 Hex Head Screw See Detail Burner Assembly 099218 03 Burner 098508 01 Valve Retainer Nut 099056 06 Injector 100620 01 Tubing Valve to Plaque A 100607 02 Tubing Valve to Plaque B 100608 01 Tubing Valve to Plaque C 100605 02 Control Valve 100616 02 Control Valve Tube 099387 06 Pilot Tubing 103594 07 ODS Pilot 100606 01 Tubing Valve to Plaque D 100615 01 Male Connector M11084 37 Screw 8 x 1 4 M11084 26 Screw 10 x 3 8 098514 01 Thermocouple 106842 01 Ignitor Electrode 099066 01 Mounting Bracket 100619 01 Thermostat Control Position Label 100619 02 Control Position Label 100642 01 Hardware Assembly 104246 21 VANGUARD VENT FREE NATURAL GAS HEATER SPECIFICATIONS VN1800ITB VN2550ITB Btu Variable 6 600 18 000 7 000 25 500 Type Gas Natural Only Natural Only Ignition Piezo Piezo Pressure Regulator Setting 6 W C 6 W C Inlet Gas Pressure in of water Maximum 10 5 10 5 Minimum 7 7 Dimensions Inches H x W x D Heater 23 5x 18 5x8 23 5 x 25 9 x 8 Carton 25 8 x 21 3 x 10 1 25 8 x 28 7 x 10 1 Weight pounds Heater 24 32 Shipping 29 38 TECHNICAL SERVICE You may have further questions about in stallation operation or troubleshooting If so contact DESA International s Technical Service Department at 1 800 323 5190 You can also visit DES
3. VENT FREE NATURAL GAS HEATER OPERATING el LIGHTING 6 Keep thermostat control knob INSTRUCTIONS pressed in while pushing down and releasing the ignitor button This will HEATER 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 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
4. away from a wall An optional floor mounting stand is needed Purchase the floor mounting stand from your dealer See Accessories page 23 A WARNING Never install the heater in a bedroom or bathroom in a recreational vehicle where curtains furniture clothing or other flammable objects are less than 36 inches from the front top or sides of the heater as a fireplace insert e in high traffic areas in windy or drafty areas A CAUTION If you install the heater in a home garage heater pilot and burner must be at least 18 inches above floor locate heater where moving ve hicle will not hit it 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 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 Combustion and Ventilation pages 4 through 6 Forconvenience andefficiency install heater e there there is easy access for operation inspection and service e in coldest part of room An optional fan kit is available from your dealer See Access
5. 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 Ay WARNING A qualified ser vice person must install heater Follow all local codes 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 ITEMS Before installing heater make sure you have the items listed below e piping check local codes e sealant resistant to propane LP gas e equipment shutoff valve e ground joint union e test gauge connection e sediment trap e tee joint e pipe wrench A CSA AGA design certified equipment shutoff valve with 1 8 NPT tap is an ac ceptable alternative to test gauge connec tion Purchase the optional CSA AGA de sign certified equipment shutoff valve from your dealer See Accessories page 23 104246 OWNER S MANUAL LOCATING HEATER This heater is designed to be mounted on a wall AX WARNING Maintain the mini mum clearances shown in Figure 4 Ifyou can provide greater clear ances from floor ceiling and joining wall You can locate heater on floor
6. orifice s is clogged or damaged Burner damaged Gas regulator defective WN Clean burner orifice s see Cleaning and Maintenance page 14 or replace burner orifice s Replace burner Replace gas regulator Burner plaque s does not glow Wn Plaque damaged Inlet gas pressure is too low Control knob set between locked positions Replace burner Contact local natural gas company Turn control knob until it locks at de sired setting Slight smoke or odor during initial operation Residues from manufacturing processes Problem will stop after a few hours of operation Heater produces a clicking ticking noise just after burner is lit or shut off Metal expanding while heating or con tracting while cooling This is common with most heaters If noise is excessive contact qualified ser vice person White powder residue forming within burner box or on adjacent walls or furniture When heated vapors from furniture pol ish wax carpet cleaners etc turn into white powder residue www desatech com 16 Turn heater off when using furniture polish wax carpet cleaners or similar products 104246 TROUBLESHOOTING Continued OWNER S MANUAL building Ay WARNING If you smell gas 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 e Immediately call your g
7. 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 VENT FREE NATURAL GAS HEATERS DESA International warrants this product to be free from defects in materials and components for four 4 years from the date of first purchase provided that the product has been properly installed operated and 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 a result of misuse accidents lack of proper maintenance or defects caused by improper installation Travel diagnos
8. use Have heater inspected yearly by a quali fied service person Heater may need more frequent cleaning due to excessive lint from carpeting bedding material pet hair etc ODS PILOT AND BURNER ORIFICE e Use a vacuum cleaner pressurized air or small soft bristled brush to clean CLEANING BURNER PILOT AIR INLET HOLE We recommend that you clean the unit ev ery 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 Inspect burner pilot for dust and dirt 3 Blow air through the ports slots and holes in the burner 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 23 With the unit off lightly blow air through the air inlet hole You may blow through a
9. A International s technical service web site at www desatech com SERVICE PUBLICATIONS You can purchase a service manual from the address listed on the back page of this manual Send a check for 5 00 payable to DESA International SERVICE HINTS When Gas Pressure Is Too Low e pilot will not stay lit e burner s will have delayed ignition e heater will not produce specified heat When Gas Quality Is Bad e pilot will not stay lit e burner s will produce 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 22 REPLACEMENT PARTS Note Use only original replacement parts This will protect your warranty coverage for parts replaced under warranty PARTS UNDER WARRANTY Contact authorized dealer from whom you purchased this product If they are unable to supply original replacement part s call DESA International s Technical Service De partment at 1 800 323 5190 for information When contacting your dealer or DESA In ternational have ready e your name e your address e model and serial numbers of your heater e how heater was malfunctioning e type of gas used propane LP or natural gas e purchase date Usually we will ask you to return the defec tive part to the factory PARTS NOT UNDER WARRANTY Contact authorized dealers of this product If they can t supply original replacement part
10. ATIC HEAT CONTROL This heater has a thermostat sensing bulb and thermostat control This results in the greatest heater comfort This can also result in lower gas bills VANGUARD VENT FREE NATURAL GAS HEATER AIR FOR COMBUSTION AND VENTILATION AX 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 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 lossin 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 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 ti
11. Keep thermostat control knob pressed in for 30 seconds after light ing pilot After 30 seconds release control knob Note If pilot goes out repeat steps 3 through 7 This heater has a safety interlock system Wait one minute before lighting pilot again Turn thermostat control knob coun terclockwise y to the desired heating level The plaque directly above the pilot should light Plaque Control Knob Thermocouple Figure 17 Pilot Figure 16 Thermostat Control Knob In The OFF Position Ignitor Electrode Pilot Burner 104246 OPERATING HEATER Continued TO SELECT HEATING LEVEL A WARNING When running heater set control knob at the 1 2 3 or 4 locked positions Never set control knob between locked positions Poor combustion and higher levels of carbon monox ide may result A CAUTION Do nottry to adjust heating levels by using the equip ment shutoff valve 1 Slightly press in plaque control knob on right side of heater and turn coun terclockwise to the desired position IMPORTANT Release downward pressure while turning control knob Control knob will lock at the desired position 2 Turn thermostat control knob on left side of heater to any setting between LO and HI Note When burners cycle on or from LO to HI a click will be heard When the burners light a whoosh noise will be heard Control Knob 1 VN1800ITB VN2550ITB
12. VANGUARD INFRARED VENT FREE NATURAL GAS HEATER OWNER S OPERATION AND INSTALLATION MANUAL VN1800ITB and VN2550ITB ar WARNING Improper installa WARNING If the information in this manual is tion adjustment alteration not followed exactly a fire or explosion may service or maintenance can result causing property damage personal in cause injury or property dam jury or loss of life age Refer to this manual for Do not store or use gasoline or other correctinstallation and opera flammable vapors and liquids in the vicinity tional procedures For assis of this or any other appliance tance or additional informa tion consult a qualified in WHAT TO DO IF YOU SMELL GAS staller service agency or the e Do not try to light any appliance gas supplier 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 WARNING This is an unvented gas fired heater Ituses air oxy gen from the room in which it is installed Provisions for ad equate combustion and venti lation air must be provided Installation and service must be performed by Refer to Air For Combustion a qualified installer service agency or the and Ventilation on page 4 of gas supplier this manual This appliance may be installed i
13. al Fuel Gas Code ANS 2223 1 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 aggre gate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1 000 Btu per hour 4 8 m per kw of the aggregate input rating of all appliances installed in that space Rooms communicating directly with the space in which the appliances are installed through openings not furnished with doors are con sidered 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 104246 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 worksheet 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 cei
14. anchor flush to wall 4 For thin walls 1 2 or less insert red key into wall anchor Push red key to pop open anchor wings IMPORTANT Do not hammer key For thick walls over 1 2 thick or solid walls do not pop open wings 5 Place mounting bracket onto wall Line up last hole on each end of bracket with wall anchors 6 Insert mounting screws through bracket and into wall anchors 7 Tighten screws until mounting bracket is firmly fastened to wall 104246 OWNER S MANUAL Figure 9 Folding Anchor x TEN Figure 10 Popping Open Anchor Wings For Thin Walls Placing Heater On Mounting Bracket 1 Locate two horizontal slots on back panel of heater 2 Place heater onto mounting bracket Slide horizontal slots onto stand out tabs on mounting bracket Horizontal Slots _ Stand Out Tab Mounting Bracket attached to wall Figure 11 Mounting Heater Onto Mounting Bracket Installing Bottom Mounting Screws 1 Locate two bottom mounting holes These holes are near bottom on back panel of heater see Figure 14 Mark screw locations on wall Remove heater from mounting bracket AYN If installing bottom mounting screws into hollow or solid wall install wall anchors Follow steps through 4 un der Attaching To Wall Anchor Method If installing bottom mounting screw into wall stud drill holes at marked lo cations using 9 64 drill bit 5 Replace heater onto m
15. and Ventilation for required size of ventilation grills or ducts AX WARNING Rework work sheet adding the space of the adjoining unconfined space The combined spaces must have enough fresh air to supply all appliances in both spaces Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts You must provide two per manent openings one within 12 of the ceiling and one within 12 of the floor Connect these items directly to the outdoors or spaces open to the outdoors These spaces include attics and crawl spaces Follow the National Fuel Gas Code NFPA 54 ANS 2223 1 Section 5 3 Air for 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 Ventilation Grills Or into Adjoining Remove Room Door into Option 1 Adjoining Room Option 3 Ventilation Grills Into Adjoining Room Option 2 Figure 2 Ventilation Air from Inside Building ALEN Ventilated Outlet Air Attic Outlet Air Inlet Air Figure 3 Inlet Air To Attic Ventilated Crawl Space Ventilation Air from Outdoors 104246 INSTALLATION NOTICE This heater is intended for use as supplemental
16. as 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 air and create odors OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Heater produces unwanted odors 1 Heater burning vapors from paint hair spray glues etc See IMPORTANT statement above Gas leak See Warning statement at top of page 1 Ventilate room Stop using odor caus ing products while heater is running Locate and correct all leaks see Check ing Gas Connections page 11 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 2 Contact local natural gas company Clean ODS pilot see Cleaning and Maintenance page 14 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 11 Replace control valve Gas odor during combustion Foreign matter between control valve and burner Gas leak See Warning statement at top of page
17. ch has been under water 11 Turn off and unplug heater and let cool before servicing Only a qualified ser vice person should service and repair heater 12 Operating heater above elevations of 4 500 feet could cause pilot outage 104246 PRODUCT IDENTIFICATION Thermostat Control Knob Piezo Ignitor OWNER S MANUAL Control Knob Cabinet Figure 1 Vent Free Natural Gas Heater Model VN2550ITB Shown LOCAL CODES Install and use heater with care Follow all local codes In the absence of local codes use the latest edition of 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 104246 UNPACKING 1 2 Remove heater from carton Remove all protective packaging ap plied to heater for shipment Check heater for any shipping damage If heater is damaged promptly inform dealer where you bought heater PRODUCT FEATURES SAFETY DEVICE This heater has a pilot with an Oxygen Depletion Sensing ODS safety shutoff system 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 THERMOST
18. drinking straw if compressed air is not available Pilot Air Inl Pilot Assembly Figure 23 Pilot Inlet Air Hole 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 cabi net to remove dust 104246 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 OWNER S MANUAL AX WARNING Turn off and un plug heater and let cool before servicing Only a qualified ser vice person should service and repair heater A CAUTION Never use a wire needle or similar object to clean ODS pilot This can damage ODS pilot unit OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor buttonis pressedin thereisno 1 Ignitor electrode positioned wrong 1 Replace ignitor spark at ODS pilot 2 Ignitor electrode broken 2 Replace ignitor 3 Ignitor electrode not connected to igni 3 Reconnect ignitor cable tor cable Ignitor cable pinched or wet Broken ignitor cable Bad piezo ignitor Piezo ignitor nut is loose Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry Replace ignitor cable Replace control valve piezo is part of control valve Tighten nut holding piezo ignitor Nut is located inside heat
19. er cabinet at top When ignitor button is pressed in there is a spark at ODS pilot but no ignition Gas supply turned off or equipment shutoff valve closed Control knob not fully pressed in while pressing ignitor button non thermostat models only Thermostat control knob not fully pressed in while pressing ignitor button thermostat models only Air in gas lines when installed ODS pilot is clogged Gas regulator setting is not correct Thermostat control knob not in pilot position Turn on gas supply or open equipment shutoff valve Fully press in control knob while press ing ignitor button non thermostat mod els only Fully press in thermostat control knob while pressing ignitor button thermo stat models only Continue holding down control knob Re peat igniting operation until air is removed Clean ODS pilot see Cleaning and Maintenance page 14 or replace ODS pilot assembly Replace gas regulator Turn thermostat control knob to pilot position ODS pilot lights but flame goes out when control knob is released 104246 W Control knob not fully pressed in Control knob not pressed in long enough Equipment shutoff valve not fully open Thermocouple connection loose at con trol valve 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 f
20. from heater carton Figure 6 Mounting Bracket Removing Front Panel Of Heater 1 Remove two screws near bottom cor ners of front panel 2 Liftstraight up on grill guard until it stops Grill guard will slide up about 1 4 3 Pull bottom of front panel forward then down Figure 7 Removing Front Panel Of Heater Methods For Attaching Mounting Bracket To Wall Only use last hole on each end of mounting bracket to attach bracket to wall These two holes are 16 inches apart from their centers Attach mounting bracket to wall in one of two ways 1 Attaching to wall stud 2 Attaching to wall anchor Attaching To Wall Stud This method pro vides the strongest hold Insert mounting screws through mounting bracket and into wall studs Attaching To Wall Anchor This method allows you to attach mounting bracket to hollow walls wall areas between studs or to solid walls concrete or masonry Decide which method better suits your needs Either method will provide a secure hold for the mounting bracket Marking Screw Locations 1 Tape mounting bracket to wall where heater will be located Make sure mounting bracket is level WARNING Maintain minimum clearances shown in Figure 8 If you can provide greater clear ances from floor and joining wall 2 Mark screw locations on wall see Fig ure 8 Note Only mark last hole on each end of mounting bracket Insert mounting
21. gh 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 A WARNING Any change to this heater or its controls can be dangerous A WARNING Do not use any accessory not approved for use with this heater Due to high temperatures the appliance should be located out of traffic and away from furniture and draperies Do not place clothing or other flammable material on or near the appliance Never place any objects on the heater Surface of heater becomes very hot when running heater Keep children and adults away from hot surface to avoid burns or clothing ignition Heater will re main hot for a time after shut down Allow surface to cool be fore touching Carefully supervise young chil dren when they are in the same room with heater Make sure grill guard is in place before running heater Keep the appliance area clear and free from combustible materials gasoline and other flammable vapors and liquids 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 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 Immediately call your gas supplier from a neighbo
22. 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 20 e turn heater off see To Turn Off Gas to Appliance page 13 e see Troubleshooting pages 15 through 17 Pilot Burner Thermocouple Figure 19 Correct Pilot Flame Pattern Pilot Burner Thermocouple Figure 20 Incorrect Pilot Flame Pattern BURNER FLAME PATTERN Figure 21 shows a correct burner flame pattern Figure 22 shows an incorrect burner flame pattern Ifburner flame pattern is incorrect as shown in Figure 22 e turn heater off see To Turn Off Gas to Appliance page 13 e see Troubleshooting pages 15 through 17 Figure 21 Correct Burner Flame Pattern Aag dlr droll Dit Figure 22 Incorrect Burner Flame Pattern CLEANING AND MAINTENANCE A WARNING Turn off heater and let cool before cleaning A CAUTION You must keep control areas burner and circu lating air passageways of heater clean Inspect these areas of heater before each
23. ling 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 all fuel burning appliances in the space Vent free heater Btu Hr Gas water heater Btu Hr Example Gas furnace Btu Hr Vented a Btu H Gas water heater 40 000 Btu Hr a h es Vent free heater 18 000 Btu Hr ee ae ee Total 7 58 000 Btv Hr Other gas appliances 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 58 000 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 ro
24. n an aftermarket permanently located manufac tured mobile home where not prohibited by local codes 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 Aftermarket Completion of sale not for purpose of resale from the manufacturer Save this manual for future reference VANGUARD VENT FREE NATURAL GAS HEATER SAFETY INFORMATION A warnines 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 cause serious 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 resemble the flu with headaches dizziness or nausea If you have these signs the heater may not be working properly Get fresh air at once Have heater serviced Some people are more affected by carbon monoxide than others These include pregnant women persons 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 thou
25. ollowing A Low gas pressure B Dirty or partially clogged ODS pilot Thermocouple damaged Control valve damaged Safety interlock system has been trig gered thermostat models only www desatech com 15 Press in control knob fully 2 After ODS pilot lights keep control sO knob pressed in 30 seconds Fully open equipment shutoff valve Hand tighten until snug then tighten 1 4 turn more A Contact local natural gas company B Clean ODS pilot see Cleaning and Maintenance page 14 or replace ODS pilot assembly Replace thermocouple Replace control valve Wait one minute for safety interlock sys tem to reset Repeat ignition operation Continued VANGUARD VENT FREE NATURAL GAS HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner s does not light after ODS pilot is lit 1 W Burner orifice s is clogged Burner orifice s diameter is too small Inlet gas pressure is too low 1 Clean burner orifice s see Cleaning and Maintenance page 14 or replace burner orifice s Replace burner orifice s Contact local natural gas company Delayed ignition of burner s Manifold pressure is too low Burner orifice s is clogged Contact local natural gas company Clean burner orifice s see Cleaning and Maintenance page 14 or replace burner orifice s Burner backfiring during combustion Ww N Burner
26. om If the extra space provides an unconfined space remove door to adjoin ing 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 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 Section 5 3 or applicable local codes Continued 104246 5 VANGUARD VENT FREE NATURAL GAS HEATER AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space When ventilating to an adjoining unconfined space you must pro 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 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
27. on 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 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 10kg 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 lf 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 Nation
28. ories page 23 If plan ning to use fan locate heater near an electri cal outlet CEILING 36 Minimum Minimum From ers Sides Of Heater Left Mi Right Side S Side IY Minimum t Top FLOOR Surface Of Carpeting Tile or Other Combustible Material Figure4 Mounting Clearances As Viewed From Front of Heater Continued VANGUARD VENT FREE NATURAL GAS HEATER INSTALLATION Continued THERMOSTAT SENSING BULB The thermostat sensing bulb has been placed inside the heater for protection during shipping Locating Thermostat Sensing Bulb 1 Remove front panel of heater see Fig ure 7 2 Locate thermostat sensing bulb just under the burner assembly IMPORTANT Attach thermostat sensing bulb to the back of heater for proper operation Attaching Thermostat Sensing Bulb 1 Remove thermostat sensing bulb from holders inside heater Route through slot opening in bottom of heater 2 Place clamp on thermostat sensing bulb as shown in Figure 5 Clamp is pro vided in hardware package 3 Snap clamp into upper mounting hole as shown in Figure 5 Mounting hole is located on lower left edge on back of heater Make sure the thermostat sens ing bulb is pointing up Thermostat Sensing Pe Bulb Clamp Figure 5 Attaching Thermostat Sensing Bulb INSTALLING HEATER TO WALL Mounting Bracket Locate mounting bracket in heater carton Remove mounting bracket
29. ounting bracket 6 Place spacers between bottom mount ing holes and wall anchor or drilled hole 7 Hold spacer in place with one hand With other hand insert mounting screw through bottom mounting hole and spacer Place tip of screw in opening of wall anchor or drilled hole 8 Tighten both screws until heater is firmly secured to wall Do not over tighten Note Do not replace front panel at this time Replace front panel after making gas connections and checking for leaks see pages 10 and 11 Figure 12 Installing Bottom Mounting Screws Continued VANGUARD VENT FREE NATURAL GAS HEATER INSTALLATION Continued CONNECTING TO GAS SUPPLY A WARNING This appliance re quires a 3 8 NPT National Pipe Thread inlet connection to the pressure regulator AX WARNING A qualified service person mustconnectheaterto gas supply Follow all local codes A WARNING Never connect heater to private non utility gas wells This gas is commonly known as well head gas IMPORTANT Check gas line pressure be fore 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 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 large enough diameter to allow proper gas volume to heate
30. r s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department 3 This heater shall not be installed in a bedroom or bathroom 4 Always run heater with plaque control knob at the 1 2 3 or 4 locked posi tions Never set control knob between locked positions Poor combustion and higher levels of carbon monoxide may result 5 This heater needs fresh outside air ven tilation to run properly This heater has an Oxygen Depletion Sensing ODS safety shutoff system The ODS shuts down the heater if not enough fresh air is available See Air for Combustion and Ventilation pages 4 through 6 6 Keep all air openings in front and bot tom of heater clear and free of debris This will insure enough air for proper combustion 7 If heater shuts off do not relight until you provide fresh outside air If heater keeps shutting off have it serviced 8 Before using furniture polish wax car pet cleaner 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 9 Do not run heater e where flammable liquids or vapors are used or stored e under dusty conditions 10 Do not use heater if any part has been under water Immediately call a quali fied service technician to inspect the room heater and to replace any part of the control system and any gas control whi
31. r If pipe is too small undue loss of pres sure will occur Typical Inlet Pipe Diameters VNI800ITB 3 8 or greater VN2550ITB 1 2 or greater Installation must include equipment shutoff valve union and plugged 1 8 NPT tap Locate NPT tap within reach for test gauge hook up NPT tap must be upstream from heater see Figure 13 IMPORTANT Install an equipment shutoff valve in an accessible location The equip ment shutoff valve is for turning on or shutting off the gas to the appliance 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 CAUTION Use pipe joint seal ant that is resistant to liquid pe troleum LP gas Pressure Regulator Regulator Bracket Heater P Cabinet Tee Joint Reducer Test Bushing to Gauge _ 1 8 NPT DoS Connection 1 8 NPT Plug Tap Sediment _ Trap Pipe Nipple Cap Figure 13 Gas Connection Install sediment trap in supply line as shown in Figure 13 Locate sediment trap where it is within reach for cleaning Locate sedi ment trap where trapped matter is not likely to freeze A sediment trap traps 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 Hold pressure regulator with wrench when connecting it
32. s call DESA International s Parts Department at 1 800 972 7879 for referral information When calling DESA Interna tional have ready e model number of your heater e the replacement part number 104246 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 or write to the address listed on the back page of this manual for referral information EQUIPMENT SHUTOFF VALVE GA5010 For all models Equipment shutoff valve with 1 8 NPT tap 104246 OWNER S MANUAL FAN KITS GA3100 A B AND GA3200T A B For all models Provides better heat distri bution Makes heater more efficient Com plete installation and operating instructions included Manually controlled GA3100 A B In cludes ON OFF switch Thermostatically controlled GA32000T A B Includes three settings ON OFF AUTO 23 Ns i Ui iy Lunii se SSS lt FLOOR MOUNTING STAND Models VN1800ITB GA4000B Models VN2550 ITB GA4010B For locating heater on the floor away from a wall Complete installation instructions provided with floor mounting stand WARRANTY INFORMATION KEEP THIS WARRANTY Model Serial No Date Purchased Always specify model and serial numbers when communicating with the factory We
33. screws through these holes only 3 Remove tape and mounting bracket from wall 13 16 Min C A TOTO ODDO OOOO OOS Only Insert Mounting 4g 3 4 Screws Through Last Min Hole On Each End i PR OMng Wary Floor Model VN2550 ITB L 9 1 4 16 x Min an Aj Roo oC COO OOOO OOOO Only Insert Mounting 48 3 4 Screws Through Last Min Hole On Each End i T smry Wat Floor Model VN1800ITB Figure 8 Mounting Bracket Clearances 104246 INSTALLATION Continued Attaching Mounting Bracket To Wall Note Wall anchors mounting screws and spacers are in hardware package The hard ware package is provided with heater Attaching To Wall Stud Method For attaching mounting bracket to wall studs 1 Drill holes at marked locations using 9 64 drill bit 2 Place mounting bracket onto wall Line up last hole on each end of bracket with holes drilled in wall 3 Insert mounting screws through bracket and into wall studs 4 Tighten screws until mounting bracket is firmly fastened to wall studs Attaching To Wall Anchor Method For attaching mounting bracket to hollow walls wall areas between studs or solid walls concrete or masonry 1 Drill holes at marked locations using 5 16 drill bit For solid walls concrete or masonry drill at least 1 deep Fold wall anchor as shown in Figure 9 3 Insert wall anchor wings first into hole Tap
34. t 099056 03 Injector 099048 01 Tubing Valve to Plaque A 099049 02 Tubing Valve to Plaque B 099050 01 Tubing Valve to Plaque C 100605 01 Control Valve 099387 06 Pilot Tubing 100616 01 Control Valve Tube 103594 06 ODS Pilot 100615 01 Male Connector M11084 26 Screw 10 x 3 8 M11084 37 Screw 8 x 1 4 098514 01 Thermocouple 106842 01 Ignitor Electrode 099066 01 Mounting Bracket 2 1 1 2 1 9 1 1 il 2 1 1 1 1 1 1 1 1 dl 2 1 1 1 3 1 1 1 1 1 1 1 2 2 3 1 1 1 100619 01 Thermostat Control Position Label 100619 03 Control Position Label 100642 01 Hardware Assembly 104246 19 VANGUARD VENT FREE NATURAL GAS HEATER ILLUSTRATED PARTS BREAKDOWN VN2550ITB 20 104246 OWNER S MANUAL PA RT S LI ST This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 22 of this manual VN2550ITB PART NUMBER DESCRIPTION 098304 01 Screw 10 x 3 8 098742 14 Front Panel 098238 07 Grill Guard 101108 01 Clip Grill Guard 098198 04 Apron M11084 26 Screw 10 x 3 8 098462 01 Control Rod Assembly 098457 05 Reflector Assembly 099415 08 Regulator M11084 38 Screw 8 x 3 8 104617 02 Cabinet Assembly 098324 01 Control Knob 098325 01 Roll Pin 097159 04 Piezo Ignitor 100537 02 Regulator Bracket
35. tic cost labor transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES INCLUDING WARRANTIES OF MER CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO FOUR 4 YEARS ON ALL COMPONENTS 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 CONSEQUENTIAL DAMAGES Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential damages so the above limitation on implied warranties or exclusion or limitation on damages may not apply to you This warranty gives you specific legal rights and you may also have other rights that vary from state to state DESA INTERNATIONAL 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 www desatech com 104246 01 104246 01 Rev E NOT A UPC 03 00 For information about this warranty write Patent Pending
36. to gas pip ing and or fittings Equipment Shutoff Typical Valve Inlet Pipe From Gas Meter 7 W C to 10 5 W C Pressure A CSA AGA design certified equipment shutoff valve with 1 8 NPT tap is an acceptable alternative to test gauge connection Purchase the optional CSA AGA design certified equipment shutoff valve from your dealer See Accessories page 23 104246 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 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 3 5 kPa 1 Disconnect appliance with its appliance main gas valve control valve and equip ment shutoff valve from gas supply pip ing system Pressures in excess of 1 2 psig will damage heater regulator 2 Cap off open end of gas pipe where equipment 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 equipment shu
37. toff valve to gas supply Check re connected fittings for leaks 104246 1 4 OWNER S MANUAL Test Pressures Equal To or Less Than 1 2 PSIG 3 5 kPa Close equipment shutoff valve see Fig ure 14 Pressurize supply piping system by ei ther using compressed air or opening main gas valve located on or near gas meter Check all joints from gas meter to equipment shutoff valve see Figure 15 Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak Correct all leaks at once Pressure Testing Heater Gas Connections 1 Open equipment 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 equipment shutoff valve to control valve see Figure 15 Apply mixture of liquid soap and wa ter to gas joints Bubbles forming show a leak Correct all leaks at once Light heater see Operating Heater pages 12 and 13 Check the rest of the internal joints for leaks Turn off heater see To Turn Off Gas to Appliance page 13 Replace front panel Equipment Shutoff Valve Figure 14 Equipment Shutoff Valve Control Valve Location Gas Meter A 4G T a a rra gt Equipment a eS eSS a a gt Shutoff Valve Figure 15 Checking Gas Joints VANGUARD
38. w N D y w 5 N gt w N q w Y Figure 18 Burner Patterns 104246 OWNER S MANUAL ai TO TURN OFF GAS TO APPLIANCE Shutting Off Heater Turn thermostat control knob clock wise N to the OFF position 2 Turn off all electric power to the ap pliance if service is to be performed Shutting Off Burner Only pilot stays lit Turn thermostat control knob clockwise N to the PILOT position eal THERMOSTAT OPERATION Since the thermostat measures the tem perature of air near the heater cabinet this may not always agree with room temperature depending on housing con struction installation location room size open air temperatures etc Frequent operation of your heater will enable you to determine your own comfort levels E MANUAL LIGHTING PROCEDURE 1 Follow steps 1 through 5 under Light ing Instructions page 12 2 With thermostat control knob pressed in strike match Hold match to pilot until pilot lights 3 Keep thermostat control knob pressed in for 30 seconds after light ing pilot After 30 seconds release control knob Follow step 8 under Lighting Instructions page 12 VANGUARD VENT FREE NATURAL GAS HEATER INSPECTING BURNER Check pilot flame pattern and burner flame pattern often PILOT FLAME PATTERN Figure 19 shows a correct pilot flame pat tern Figure 20 shows an incorrect pilot flame pattern The incorrect pilot flame
39. which has been un der water Thermostat Control Knob STOP Read the safety information at the top column 1 Make sure equipment shutoff valve is fully open Turn thermostat control knob on left side of heater clockwise XN to the OFF position Wait five 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 column 1 If you don t smell gas go to the next step Turn thermostat control knob on left side of heater counterclockwise y N to the PILOT position Press in thermostat control knob for 5 seconds Note You may be running this heater for the first time after hook ing up to gas supply If so you may need to press in thermostat control knob for 30 seconds This will allow air to bleed from the gas system e If thermostat control knob does not pop up when released contact a qualified service person or gas supplier for repairs Ignitor Button light pilot If necessary continue to press ignitor button until pilot lights If pilot does not light e turn thermostat control knob clockwise XN to the OFF po sition e repeat steps 5 and 6 If pilot does not stay lit after several tries e refer to Troubleshooting pages 15 through 17 e contact a qualified service person or gas supplier Until repairs are made light pilot with match To light pilot with match see Manual Lighting Procedure page 13
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