L.B. White Classic 346 Owner's Manual And Instructions

L.B. White Classic 346 Owner's Manual And Instructions Manual pdf 23 page image

Classic Agricultural Animal Confinement Building HeatersOwner’s Manual • Classic23FIG. 34Testing the thermocouple:-- Obtain a volt /ohm meter and set the meter to thecontinuity scale.-- Place the probes at both ends of the thermocouple.-- The meter should exhibit readings of approximately 1ohm or less. A reading showing high resistance or anoverload condition indicates a defective thermocouple.Pilot Light Assembly1. Remove the pilot shield, exposing the pilot bracket,pilot orifice, and thermocouple. See Fig. 35, Classic115 shown.FIG. 352. Using a soft brush or compressed air, clean the pilot ofdust and dirt, paying attention to the the flame spreaderat the top of the stack.3. Blow off the top of the pilot orifice to clean out as muchdirt as possible.4. Servicing the pilot orifice:-- Remove the pilot tube from the inlet of the pilotorifice See Fig. 35.-- Remove the pilot orifice from the pilot bracket.-- Hold the orifice up to the light to see if the holesin the orifice are open. If not, clean with air orreplace.-- See Fig. 36 for comparison. Ensure the properpilot orifice is installed for the fuel being used.(Note the number stamped on the flat of the orificehex to identify if LP or NG.)FIG. 365. When lit after cleaning, the pilot flame should impingeon the upper half of the thermocouple. The flameshould not be wavy, noisy, or lazy. See Fig. 37.FIG. 37Classic 115:Ensure the pilot gasket is located as shown in Fig. 38,and is not torn. A missing or damaged gasket will causea pilot outage to occur when the blower motor is operat-ing. Ensure the gasket is properly positioned on theburner before after servicing the pilot or at reassemblyof the pilot assembly.THERMOCOUPLE CONNECTED TOGAS CONTROL4712LPPILOT FLAMESPREADERHEADTHERMOCOUPLETOP HALF OFTHERMOCOUPLE6721NGPILOT ORIFICEPILOT TUBEFITTING