Lincoln 1100 Series service manual DC Gearmotor

Page 32

DC Gearmotor

Time/Temp Display

12.6 VAC Power

inoperative

Supply

S/N 2011821 & Above

Refer to Page 45

Temp Display out or

NOTE: Time/Temp displays

erratic

uses two types of temperature

 

sensor, Thermistor Probe -

 

2 yellow wires, Thermo-

 

couple Probe - 1 red wire

 

and 1 white wire

 

Thermistor Probe

Thermocouple Probe

changing a board or tach. This test is not always 100% accurate as this test is not performed at operating speeds. However, this test is the best method currently available. Readjustment should always be attempted at least once before replace- ment. See procedure for board adjustment in Section D.

If the problem seems to be the motor or gearbox. Check the brushes in the motor for excessive arcing and/or unusual wear. Check the motor and gearbox from instructions located under “possible cause” listing “Conveyor gear motor”. Measure the transformer primary

for a nominal 120 VAC input.

If 120 VAC primary voltage is not available, refer to the schematic and trace the circuit for incomi ng power failure

Measure the secondary voltage output which will be 12.5 to 15 VAC normally. Recheck secondary output at rear of Time/Temp Display. Terminals 1 to 3 should read 12.5 to 15 VAC. Terminals 1 to 2 and 2 to 3 should be

1/2 of the reading across 1 to 3. If you do not get the above secondary readings, replace the transformer. The older units have a 4 amp ambient fuse in each red secondary lead. These may be jumpered to determine if they are burnt out or intermittent.

Insert the thermocouple of your pyrometer into a finger hole in the top center of the oven. The thermocouple tip should measure air temperature and must not be touching metal. Disconnect the yellow tipped thermistor leads from the time/temp. terminals 9 &10 Measure the resistance of the thermistor probe See the chart in Section D for proper

resistance readings. Inspect the thermistor bulb for itsproper location in its spring holder.Check for short in leads where they enter the sensor bulb. Also check each thermistor lead for short toground. Connect temperature meter to thermocouple at terminals 9 and 10 on back of the time/temp display. (Be sure tomaintain proper polarity on therocouple connections.) Compare actual oventemperature with the reading at the time/temp display. If the temperature readings match, re-calibrate or replace time/temp

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Impinger II - 1100 Series Service Manual - International

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Contents SERVICE MANUAL IMPINGER CONVEYOR OVENSMODEL 1100 SERIES INTERNATIONALTABLE OF CONTENTS SEQUENCE OF OPERATIONS 1104 thru the display into a temperature reading SEQUENCE OF OPERATION 1134 - 1135 - 1136 - S/N 2011383 and above SEQUENCE OF OPERATIONS 2011383 and above SEQUENCE OF OPERATIONS 1152 thru intervals to maintain desired temperature temperature reading by the display into a temperature readingSCHEMATIC SCHEMATIC SCHEMATIC 1134, 1135, 1150, S/N 2011383 AND BELOW SCHEMATIC 1134, 1135 S/N 2011383 AND ABOVE SCHEMATIC 1150 S/N 2011383 AND ABOVE SCHEMATIC 1136, S/N 2011383 AND BELOW SCHEMATIC 1136, S/N 2011383 AND ABOVE SCHEMATIC 1151 S/N 2011383 AND BELOW SCHEMATIC 1151 S/N 2011383 AND ABOVE SCHEMATIC1152 THRU 1158 S/N 2011383 AND BELOW SCHEMATIC1152 THRU 1158 S/N 2011383 AND ABOVE SCHEMATIC1152 AND 1153 S/N 2011821 AND ABOVE SCHEMATIC 1154 THRU 1158 S/N 2011821 AND ABOVE TROUBLE SHOOTING GUIDE GAS OVENS MODELS 1152 - 1153 - 1154 - 1155 - 1156No main fan cool down Burner Switch switch. If switch is closed and voltagepresent on one side only, replace switch Gas Pressure SwitchCheck for proper line voltage to Power Supply Ignition Control Flame will not stay onFlame Sensor Pilot lamp is on, butthen the problem is usually with thetemperature improper adjustment. Also check for worn bearings. TheInstallation and Operations ManualPower Supply Check power supply at the DCDC Gearmotor surge in the incoming power lines. To eliminate this condition remove power from the time/tempswitch for 15 seconds, or if display stays on required. This should eliminate the problem. IfTROUBLE SHOOTING GUIDE ELECTRIC OVENS Switch, Heat Air Pressure SwitchThis normally open switch should close when the adjustment knob to maximum temperature positionas follows MODEL Main fan runs after WITH POWER OFF: To check resistance of the maintenance. Also, most of the problemsfor proper readings. If these readings are not achieved, replace thermocoupleConveyor will not run TROUBLESHOOTING GUIDE ELECTRIC OVEN MODEL 1151 200 VAC THREE PHASE 60 HZRelay, Main Fan Mercury Contactor Heater Elements Conveyor will not run S/N 2011383 and aboveREFER TO PAGE REFER TO PAGE REFER TO PAGE REFER TO PAGE REFER TO PAGE 43STEPPER MOTOR DRIVE Conveyor will not run 12 VAC Power Supply yellow wires, thermored wire and 1 white wire Thermocouple Probe Power Supplyexperienced, such as a rolling of REMOVAL, INSTALLATION, AND ADJUSTMENT IMPINGER II CONVEYOR OVENRELAY, DPST 1.Shut off power at main breaker This is part of the burner blower motor assembly TO REMOVE THE BLOWER WHEEL FOR PERIODIC CLEANINGMOTOR, BURNER BLOWER TO REMOVE BLOWER MOTORAIR PRESSURE SWITCH Page Page 1.Shut off power at the main breaker SOLENOID VALVE 1.Shut off power at main breaker5.Loosen pipe union in piping assembly HEATING ELEMENTS 1.Shut off power at main breakerIGNITION CONTROL 1.Shut off power at main breaker ORIFICE, MAIN BURNER 2.Shut off gas at main line to the oven4.Remove control compartment covers 5.Loosen 4 nuts holding manifold to burner capLAMP, PILOT BURNER LENS, PILOT LAMP OPTICAL ENCODER ASSEMBLY 1.Remove gearmotor assembly see “GEARMOTOR” Above7.To adjust optical encoder TACH. GENERATOR 1.Turn off power at main breakerD C MOTOR CONTROL BOARD 1.Turn off power and remove conveyor 4.Reverse wires fastened to terminals A+ and A5.Reverse wires fastened to terminals T1 and T2 1.Turn off power 2.Remove conveyorTRANSFORMER, TIME/TEMP. DISPLAY MODEL 1100 SERIES OVENS OHMS SWITCH, DISPLAY, SETOVEN TEMPERATURE SWITCH, ON/OFF TRANSFORMER, STEP DOWN/120 VAC DIP SWITCHES FOR 50 SEC. TO 30 MIN. TIMES maximum speed potrefer HALL EFFECT SENSOR - REPLACEMENT AIR PRESSURE SWITCH, BURNER OR OVEN CAVITY BURNER ALARM - REPLACEMENT 4.Remove conveyor gear motor8.Remove top control compartment brace 10.Assemble in reverse orderDESCRIPTION GENERAL –1100SERIESLETTER GENERAL 1100 SERIES BLOW UP 1136,1150,1151,1160 Thru1163 Page CONTROL COMPARTMENT - FRONT MODELS 1152 THRULETTER DESCRIPTIONCONTROL COMPARTMENT – FRONT 1152-1158BLOW UP DESCRIPTION CONTROL COMPARTMENT – REARLETTER CONTROL COMPARTMENT - REAR BLOW UP MODELS AND ABOVE MODELS 1160-1163S/N 2011978 AND ABOVE CONTROL COMPARTMENT – REAR BLOW UPMODELS 1130-1136,1150,1151S/N 2011383 AND ABOVE DESCRIPTION CONTROL COMPARTMENT – REARLETTER Page CONTROL COMPARTMENT – REAR MODELS 1152 THRU 1158 S/N 2011821 AND ABOVELETTER DESCRIPTIONPage OVEN BACK ASSEMBLY – 1100 SERIES OVEN BACK ASSEMBLY – 1100 SERIES BLOW UP GEARMOTOR ASSEMBLY – 1100 SERIES GEARMOTOR ASSEMBLY – 1100 SERIES BLOW UP CONVEYOR/DOOR – 1100 SERIES CONVEYOR/DOOR – 1100 SERIES BLOW UP This page intentionally left blank This page intentionally left blank
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