Lb-white AD250(Spark Ignition) User Manual

All Models areavailable in eitherL.P. Gas VaporWithdrawal orNatural GasConfigurations.MODELS OUTPUT (Btuh) FUELAD250 250,000Congratulations!You have p

1. Assemble according to the illustration and tighten alleyebolts securely. (See Fig. 2):FIG. 22. Be sure heater is securely fastened and is hangingl

1. To Connect the Series Tap Plug Thermostat Kit:a. Connect the power cord of the heater to thefemale side of the plug on the end of thethermostat cor

Follow steps 1 - 6 on initial start-up after heater installationby a qualified gas heater service person. For normal start-up, simply turn thermostat

1. Some models of propane (LP) gas or natural gasheaters have a throttle valve for varying heat outputlocated between the gas control valve and gasman

WARNINGThis heater may be washed only on the external caseassembly provided:A. The heater is disconnected from the electricalsupply.B. All access pane

141. Shut off the gas supply to the heater.2. Disconnect the heater from its electrical supply.3. Open the case fan access panel on the control boxend

1. Close the fuel supply valves to the heater anddisconnect the heater from its electrical supply.2. The igniter and sensor assembly is located within

ATTENTION The following explains a typical procedure to be followedin checking gas pressures. The gas pressures will vary depending upon fuel type.

TESTING THE MANUAL RESET HIGH LIMIT SWITCHWARNINGFire Hazard Do not operate the heater with the high limit switchbypassed. Operating the heater a

Troubleshooting InstructionsREAD THIS ENTIRE SECTION BEFOREBEGINNING TO TROUBLESHOOT PROBLEMS.The troubleshooting flow charts in this section provides

SPARK IGNITION OPERATION SEQUENCE:— Line Voltage is Sent to Transformer and to IgnitionControl— 24 V.A.C. is sent from Transformer to the Thermostat—

ProblemLED constant onLED lightnot onduring acall forheat.Normal operation.Is heaterplugged in?Plug heater in.YesNoYesYesYesIs thermostatset above roo

ProblemLED FlashingOne TimeFlash pattern beginsimmediately, fan motordoes not run. Heaterdoes not light.Is flapper orair-proving switch armbinding on

Two TimesFlash patternbegins 12seconds afterconditionoccurs.(Patternindicates lack of airproving in fansection of unit.)Are air-proving switchcontacts

Three TimesLack ofignition. The modulehas gone intosafety lockout.Is LP tankfull and properly sized and are all gas supply valves to heater open?Fill

Four TimesIf DSI board does not reset, then replace the board. (Internal board fault.)If DSI board resets, then have qualified electrician check powe

CAUTIONAlways refer to the heater’s electrical connection diagram when servicing to avoid wiring errors and heater malfunction.Check for proper operat

26Heater Component FunctionAir Proving Switch Safety device used to insure that the proper air flow is beingachieved before the gas valve is opened.

27212425262728292332303122332019181716141513121110 2 9 7 8 4 3 5 6 1363534Parts IdentificationPARTS SCHEMATIC

28Parts IdentificationPARTS LISTItem Description Part Number1 Regulator, LP Gas, 2nd Stage, Vent Over Outlet 06553Regulator, LP Gas, 2nd Stage, Vent O

WARNINGFire and Explosion Hazard Not for home or recreational vehicle use. Installation of this heater in a home orrecreational vehicle may result i

Contact your local L.B. White dealer for replacement partsand service or call the L.B. White Co., Inc. at 1-800-345-7200for assistance. Be sure that

This Owner's Manual includes all options and accessoriescommonly used on this heater. However, depending on theconfiguration purchased, some opt

SPECIFICATIONSMaximum Input (BTUH) 250,000Minimum Input (BTUH) 160,0001,050 CFM11 in. 7 in.W.C. W.C.10 in. 4 in.W.C. W.C.11.58 250lbs. cu. ft.7.41 16

LP gas and natural gas have man-made odorants added specifically for detection of fuel gas leaks.If a gas leak occurs, you should be able to smell the

1. Do not attempt to install, repair, or service this heateror the gas supply line unless you have continuingexpert training and knowledge of gas heat

1. Read all safety precautions and follow L. B. Whiterecommendations when installing this heater. Ifduring the installation or relocating of heater,

12. A qualified service agency must check for properoperating gas pressure upon installation of theheater.13. Light according to instructions on heate