Dean 2020E Installation & Operation Manual

Contents

Dean 2020E Installation & Operation Manual Manual pdf 9 page image

6Do not use steel wool, abrasive cloths,cleansers, or powders! If it is necessary toscrape stainless steel to remove encrustedmaterials, soak the area with hot cloths toloosen the material, then use a wood or nylonscraper. Do not use a metal knife, spatula, orany other metal tool to scrape stainless steel!Scratches are almost impossible to remove.7. TROUBLESHOOTINGThese troubleshooting procedures must becarried out only by a Factory Authorized ServiceAgent or a local service company specializing inhotel and restaurant cooking appliances.FACTORY APPROVAL MUST BE OBTAINEDPRIOR TO ANY WARRANTY WORK BEINGDONE OR DEAN INDUSTRIES CANNOT BEHELD RESPONSIBLE.7.1 If the elements will not turn on and thereis no evidence of heating the vessel evenwhen cold, check the following:a) With the proper ON/OFF switch "ON",manually reset the high temperature limitswitch (push the red button behind theaccess door).b) Check that the branch or main circuitbreakers or fuses are not tripped orblown.c) Check that correct line voltage existsacross block terminals L1-L2, L2-L3, andL3-L1 (three-phase connection), or L1-L2 (single-phase connection).d) Check that correct line voltage exists onall terminals on the load side of thecircuit breakers.e) If the panel indicator light is glowing butcontactors are not actuated, checkcontinuity of the two holding coil circuits,from the indicator light to L2.f) If the panel indicator light is not glowing,first check that line voltage does notexist across the lamp, then:1) Check the fuse for line voltagebetween the load side and L2.2) Check the power on/off switch for linevoltage between the load side andL2.3) Check the high limit thermostat forline voltage between the load sideand L2; if resetting does not produceresults, replace the device.4) Check the operating thermostat forline voltage between the load sideand terminal L2; if defective, replacethe part.5) Check the wiring to the temperaturecontroller.7.2 Poor temperature control on the coldside; warm-up time excessive; slow orinadequate temperature recovery whenvessel loaded; uneven heating.a) Check temperature controlleradjustment: Place the sensing bulb of ahigh quality immersion thermometerabout 1-1/2 inches above the thermostatsensing bulb or RTD probe and set thecontroller dial for 350°F. Wait at least 20minutes for the oil temperature tostabilize. If the temperature is not with+/-10°F of the dial setting, see "ProbeTest" below for the solid state"Thermatron" controller or call forservice for an operating thermostat.b) With the panel indicator light glowing,check that both holding coil circuits orcontactors are energized and contactorsare actuated.c) Check the load side of the contactors tothe heating element terminals. Eachelement should draw about 30 amps(208V) or 26 amps (240V).