SERVICE MANUAL - Beals & Bob's-Parts For Oil Fired And LP .
SECTION ASERVICE MANUALLOW PRESSUREPORTABLE FORCED AIR HEATERHOT SURFACE IGNITION MODELS
Hot Surface Ignition Models Service ManualSAFETY INFORMATIONWARNINGSIMPORTANT: Read this owner’s manual carefully andcompletely before trying to assemble, operate, or service this heater. Improper use of this heater can causeserious injury or death from burns, fire, explosion,electrical shock, and carbon monoxide poisoning. DANGER: Carbon monoxide poisoning may leadto death!Carbon Monoxide Poisoning: Early signs of carbon monoxidepoisoning resemble the flu, with headaches, dizziness, and/or nausea. If you have these signs, the heater may not beworking properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxidethan others. These include pregnant women, persons withheart or lung disease or anemia, those under the influence ofalcohol, and those at high altitudes.Make certain you read and understand all warnings. Keep thismanual for reference. It is your guide to safe and properoperation of this heater. Use only kerosene or No. 1 fuel oil to avoid risk of fire orexplosion. Never use gasoline, naphtha, paint thinners,alcohol, or other highly flammable fuels. Fuelinga)Personnel involved with fueling shall be qualified andthoroughly familiar with the manufacturer’s instructionsand applicable federal, state, and local regulations regarding the safe fueling of heating units.b)Only the type of fuel specified on the heater’s data plateshall be used.c)All flame, including the pilot light, if any, shall be extinguished and the heater allowed to cool, prior to fueling.d)During fueling, all fuel lines and fuel-line connectionsshall be inspected for leaks. Any leaks shall be repairedprior to returning the heater to service.e)At no time shall more than one day’s supply of heaterfuel be stored inside a building in the vicinity of theheater. Bulk fuel storage shall be outside the structure.f) All fuel storage shall be located a minimum of 25 feetfrom heaters, torches, welding equipment, and similarsources of ignition (exception: the fuel reservoir integralwith the heater unit).g)Whenever possible, fuel storage shall be confined toareas where floor penetrations do not permit fuel todrip onto or be ignited by a fire at lower elevation. 2h)Fuel storage shall be in accordance with the federal,state, or local authority having jurisdiction.Never use heater where gasoline, paint thinner, or otherhighly flammable vapors are present.Follow all local ordinances and codes when using heater.Heaters used in the vicinity of tarpaulins, canvas, or similar enclosure materials shall be located a safe distancefrom such materials. The recommended minimum safedistance is 10 feet. It is further recommended that theseenclosure materials be of a fire retardant nature. Theseenclosure materials shall be securely fastened to prevent them from igniting or from upsetting the heater dueto wind action.Use only in well-vented areas. Before using heater, provide at least a three-square-foot opening of fresh, outsideair for each 100,000 Btu/Hr of rating. This heater producescarbon monoxide, which is listed by the State of Californiaas a reproductive toxin under Proposition 65.Use only in places free of flammable vapors or high dustcontent.Use only the electrical voltage and frequency specifiedon model plate.Use only a three-prong, grounded extension cord.Minimum heater clearances from combustibles:Outlet: 8 Ft. Sides: 4 Ft. Top: 4 Ft.Rear: 4 Ft.Locate heater on a stable and level surface if heater ishot or running or a fire may occur.When moving or storing heater, keep heater in a levelposition or fuel spillage may occur.Keep children and animals away from heater.Unplug heater when not in use.When used with thermostat, heater may start anytime.Never use heater in living or sleeping areas.Never block air inlet (rear) or air outlet (front) of heater.Never move, handle, refuel, or service a hot, operating,or plugged-in heater.Never attach duct work to front or rear of heater.Approved by the New York City Fire Department undercertificate of approval #4803, #4860, #4908, or #4909.To be used only at construction sites in accordance withapplicable New York City Codes, Regulations, Rules,Directives, Permits, etc.Warning to New York City Residents For Use Only AtConstruction Sites in accordance with applicable NYCcodes under NYCFD certificate of approval #4803, #4899,#4908, #4909, or #4934.
Hot Surface Ignition Models Service ManualTABLE OF CONTENTSGENERAL INFORMATIONGeneral InformationI. ARRANGEMENT OF MANUALI.II.III.IV.V.Arrangement of Manual . 3Technical Service Department . 3Service Preparation . 3Tools Required . 4Parts . 4SpecificationsI.General Specifications1. Fuel Selection . 52. Electrical . 53. Ventilation . 54. Heater Sizing . 5II. Heater Performance Specifications . 6Component OperationI.II.III.IV.V.Air System1. Air Pump . 72. Air Filters . 73. Nozzle . 7Electrical System1. Motors . 72. Ignition Control/Photocell . 83. Hot Surface Ignitor . 8Fuel System . 8Combustion System . 9All Systems Working Together . 9TroubleshootingI. Safety Requirements . 10II. Cautions . 10III. Using The HA1170 Tester1. Operation . 102. Calibration . 10IV. Diagnostic Charts . 10Wiring Diagrams . 23This manual contains information and service procedures toassist the service technician in understanding and correctingproblems on DESA International oil-fired portable forced airheaters. The first section of the manual contains basic information concerning the operation of the different componentsin the heater. This information should be reviewed by servicepersonnel to provide a basic understanding of how the components function in the working system. The Troubleshootingsection of this manual is intended to provide a quick referenceconcerning conditions which result in customer complaints.These procedures will help the service technician quicklydiagnose a malfunctioning heater. The illustrations in thismanual may not necessarily depict the actual heater model,and are intended for reference ONLY.II. TECHNICAL SERVICE DEPARTMENTThe Technical Service Department, located in Bowling Green,Kentucky, is committed to assisting our Authorized ServiceCenters to increase their service knowledge, so that they canprovide prompt, efficient service. This Service Manual covers themajority of problems that are associated with the heaters.However, as with any product, certain problems can arise whichhave not been covered. If such problems arise, please call theTechnical Service Department's number, 1-800-323-5190, orvisit our website at www.desatech.com, to address these technical problem areas. If you need assistance for ordering parts,billing questions, etc. you should contact 1-800-432-5212.III. SERVICE PREPARATIONA clean work area at the start of each job is essential forefficient service work. Heaters which are extremely dirtyshould be cleaned prior to service. Cleaning will occasionallyuncover the problem area. Tools needed for the job should beobtained before work is started. Delays resulting from locatingtools result in lost time and wages.Clean fuel should always be used when testing heaters. Manyproblems are often traced to the use of the wrong type of fuelor dirty fuel.Use caution and common sense when working on a heater.Always remember that kerosene is flammable, and electricalparts can result in potential shock. Heater parts are hot duringoperation, which could result in burns.3
Hot Surface Ignition Models Service ManualIV. TOOLS REQUIREDV. PARTSIn addition to common hand tools, the service shop shouldhave the following tools and instruments for proper repairingof the heaters. These instruments will be referred to throughout this manual.In addition to the standard parts we now offer parts kits. Listedbelow are the item numbers and the accessory descriptionITEM NUMBERACCESSORYINSTRUMENTRANGEControl/Photocell TesterPressure GaugeFeeler GaugeMultimeterN/A0-15 P. S. I.001 to .1 inch0-250 VAC0-200 OhmHA1176AHA1180HA1210HA1202HA2210Parts Kit/All ModelsAir Gauge/All ModelsThermostat/Forced Air & LP Forced AirHeavy Duty Wheel KitFits: 35, 40, 50, 55, 60, 70 ModelsWheel KitFits: 35, 40, 50, 55, 60, 70 ModelsRear Handle Fits: 110, 115 ModelsRear HandleFits: 150, 155, 165, 200 ModelsFiller Neck ScreenITEM NUMBERREPLACEMENT PART104068-03Ignition controlFits: 35, 40, 50, 55, 60 ModelsIgnition control Fits: 70, 110, 115,150, 155, 165, 200 ModelsRotor Kit 1/2"Nozzle (35, 40 Models)Nozzle (50/55 Models)Nozzle (60 Models)Nozzle (70 Models)Nozzle (110, 115 Models)Nozzle (150, 155 Models)Nozzle (165 Models)Nozzle (200 Models)Hot Surface IgnitorAir Filter Kit (35, 40, 50, 55, 60, 70Models)Filter Kit (110, 115, 150, 155, 165,200 Models)Rotor Kit 5/8"PhotocellPump Adjustment KitPART NUMBERHA1170HA1180None*None**HA1206*Available at any auto parts store.**Available at most electronic 3HA2204104068-02HA3004HA3006Refer to Owner’s 8-03HA3014Pressure GaugeMultimeterHA3017HA3005M16656-24HA30204
Hot Surface Ignition Models Service ManualSPECIFICATIONS3. VentilationI. GENERAL SPECIFICATIONSThe heater should be used only in well-ventilated areas. As arule, the following minimum requirements should be followed.1. Fuel SelectionHEATER SIZE (BTU)SQUARE FOOT OPENINGOne of the most critical specifications for trouble-free operation is the use of a clean, acceptable fuel. Listed below areguidelines and comments concerning operation of heaterswith different 00/115,000150,000/155,000165,000200,0001.0 Sq. Ft.1.6 Sq. Ft.2.1 Sq. Ft.3.2 Sq. Ft.4.5 Sq. Ft.5.0 Sq. Ft.6.0 Sq. Ft.RECOMMENDEDFUELSCOMMENTSKeroseneFuel Oil No.1Jet "A"Best overall results. Minimum odor andminimum maintenance. No additivesnecessary for cold weather operation.ALTERNATE FUELSCOMMENTSFuel Oil No. 2Diesel No. 1Diesel No. 2Noticeable increase in odor. Requiresfrequent maintenance of fuel filterand nozzle. Requires a winterizingadditive at temperatures below 20 F2. ElectricalThe heater must be connected to a standard electrical outlet(120V/60HZ). For safety, all heaters are equipped with a threeprong power cord, which must be grounded. When selectingan extension cord for heater usage, the following chart shouldbe used in determining wire size.LENGTH OF CORDWIRE SIZE (AWG)100 Ft.200 Ft.300 Ft.400 Ft.No. 14No. 12No. 10No. 8No. 6The above is based on ventilation requirements of at least a3 sq. ft. opening per 100,000 BTU. If possible, it is better toprovide cross-ventilation to achieve better air movement.4. Heater SizingThe user should be aware of the proper size heater neededfor a particular application. It is easy to see that a 35,000 BTUheater would not heat a large warehouse, but the question issometimes asked "What size heater should I use?" A simpleformula that can be used to determine heater BTU requirements follows:Cu. Ft. of Area X .133 X Desired Temp. Rise F BTU SizeNeeded.Example:Area: 50' X 25' X 10' 12,500 Cu. Ft.Desired Temp. Rise: 30 F12,500 (Cu. Ft.)X .133 (Factor)1662.5X 30 (Temp. Rise)49,875 (Proper Heater Size)5ANSWER: A 50,000 BTUheater should be selectedfor this application.
Hot Surface Ignition Models Service ManualII. HEATER PERFORMANCE SPECIFICATIONSTechnical Service Heater Performance DataHeater ModelBTURatingPumpPSI .1NozzlePart No.NozzleGPH 5%MotorPart No.MotorMotorR.P.M. t AirOutput(C.F.M.)AMPS(Running)102548-03 104068-033.01652.01/15102548-03 104068-033.01702.017251/15102548-03 48-03 02548-03 02001-21)34501/5102548-03 1(102001-21)34501/5102548-03 03493-01(102001-21)34501/5102548-03 -03 9)1.20103493-01(102001-21)34501/5102548-03 183-01(102001-27)34001/4102548-03 104068-0213.56003.6M16656-24 Photocell will apply to all models for service.6IgnitorKitControlBoard
Hot Surface Ignition Models Service ManualCOMPONENT OPERATION3. NozzleI. AIR SYSTEM1. Air PumpThe heater's air pump consists of a rotor with four carbonblades rotating inside a pump body. The rotor is driven directlyby the motor and is attached to the motor shaft by means ofa plastic insert. As the motor rotates, the carbon blades traveloutward rubbing against the inside surface of the steel pumpbody. The rotor's position inside the pump body is such thatit is not concentric with the pump body and a .003/.004 of aninch gap is set at the uppermost quadrant. As the motorrotates, the air between the blades is compressed and routedto the nozzle through the air line.Gap AdjustingScrewAs mentioned previously, the purpose of the air pump is tocompress air and deliver it to the nozzle. The compressed air,as it travels through the nozzle, creates a negative pressurethat extends back through the center of the nozzle. Thisnegative pressure lifts the fuel from the fuel tank. The fuel fromthe fuel tank and the compressed air are mixed at the nozzlewhich results in a very fine mist of fuel being sprayed into thecombustion chamber. The air pump/nozzle combination eliminates the need for a conventional type fuel pump. It isimportant for the service technician to understand the nozzleoperation. In many cases concerning improper operation of aheater, the problem is the result of a seal leak or a restriction(dust/dirt) being present within the nozzle. It should also bepointed out that each model heater requires different nozzlesdue to different fuel flow rates.003/.004ClearanceMeasuredwith FeelerGageMotor ShaftInsertCompressedAir FromPumpAir Intake SideAir OutputSideRotorNozzle FacePump BodyBladeFuel Lifted From Tankby Negative PressureDirection of Rotation-Clockwise2. Air FiltersII. ELECTRICAL SYSTEMThe air filtering system consists of an air input filter and an airoutput filter. The air input filter is located at the right rear of themotor and its purpose is to filter all incoming air prior toentering the air pump. The filter design is such that it can becleaned in a mild, soapy solution, thoroughly dried and usedover again. The air output filter is located under the plastic endcover. This filter's purpose is to prevent any carbon dust (fromrotor or blade wear) from entering the air passages in thenozzle. This filter is non-cleanable and should be replacedwhen considerable buildup of carbon dust is observed. (Seedrawings below).1. MotorsAir Output FilterAir Output FilterAir InputFilterAir InputFilterThe motors used on the low pressure heaters are fractionalhorsepower motors ranging from 1/15 HP on the smallestheater to 1/4 HP on the largest heaters. The motors used canbe grouped into two categories. The first category is theshaded pole motor. The shaded pole motor contains a singlewinding and does not require an integral start/run capacitor foroperation. This type of motor is used on 35, 40, 50, 55, and 60model heaters.The second category is the permanent start capacitor motor.This motor contains two separate windings. The first windingbeing the auxiliary or start winding and the second being themain or run winding. This motor utilizes an integral start/runcapacitor which is wired internally and cannot be replaced.This type of motor is used on the 70, 110, 115, 150, 155, 165,and 200,000 Btu models.XAUMOTOR35,000, 50,000, 55,000, and70,000 BTUFilter SystemAC LINE110,000, 115,000, 150,000,155,000, 165,000, and 200,000BTU Filter SystemShaded Pole Motor7CAPACITORMAINAC LINEPermanent Start Capacitor Motor
Hot Surface Ignition Models Service Manual2. Ignition Control/Photo Cell3. Hot Surface IgnitorThe ignition control circuit consists of a photocell (light sensitive resistor) and an ignition control. The photocell is used tosense the presence of light inside the combustion chamber.The resistance of the photocell changes as the light levelinside the combustion chamber changes. When the heater isoperating properly, the flame pattern inside the combustionchamber is very turbulent which results in the resistance of thephotocell increasing and decreasing very rapidly. This dynamic change in resistance is required by the ignition controlto allow the heater to continue to operate. If the signal from thephotocell becomes “lazy” or steady state indicating a lack ofturbulence, then the heater will be turned off. Some examplesof this condition are a loss of fan and a blocked inlet. Becausethe photocell also responds to the color of the flame, thecontrol will also shut off the heater if the fuel/air mixture is toolean. With a fuel lean mixture the flame becomes blue in colorand the photocell does not respond to that end of the lightspectrum as well as it responds to orange light which ispresent during proper operation. As a service technician, it isimportant to understand the operation of the ignition control.In the past, it has been the single most misdiagnosed part ofthe heater. It is suggested that all controls be checked perinstructions listed in the Troubleshooting section, prior toreplacement.All models will use 102548-03 Ignitor Kit.PhotocellThe hot surface ignitor is rated for 120 volts. With the ratedvoltage applied, the ignitor element heats up to 1400º Celsius(2550º Fahrenheit) within 5 seconds. When the atomized fuelis sprayed by the nozzle it is ignited by this extremely hotsurface.Note: It is important for the service technician to be cautiouswhen working with the hot surface ignitor due to its extremelyhigh operating temperature. Care should also be taken not tobend or strike the ignitor element.IgnitorBlockIgnitor ElementIII. FUEL SYSTEM (FUEL FILTERS)There are several types of fuel filters used on different modelheaters. The filters are always located in line with the fuelpickup tube. The purpose of the filter is to eliminate thepossibility of dirt, dust, etc. from entering the nozzle andrestricting the flow. The filters should be inspected andcleaned whenever a heater is brought in for service. It is alsoimportant that the bottom of the tank be inspected for sedimentation or dirt buildup. The filter’s design is such that apossible restriction in the filter screen can be pre
Refer to Owner’s Manual Nozzle (50/55 Models) HA3024 Nozzle (60 Models) HA3026 Nozzle (70 Models) HA3027 Nozzle (110, 115 Models) HA3028 Nozzle (150, 155 Models) HA3029 Nozzle (165 Models) 100735-31 Nozzle (200 Models) 102548-03 Hot Surface Ignitor HA3014 Air Filter Kit (35, 40, 50, 55, 60, 70 Models) HA3017 Filter Kit (110, 115, 150, 155 .
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