Lincoln 1100 Series service manual intervals to maintain desired temperature

Page 10

 

adjusted to desired temperature. The Thermocouple will provide varying

 

millivolts to the Electronic Temperature Controller. The electronic tempera-

 

ture controller supplies 120 VAC to the Solenoid Valve at intermittent

 

intervals to maintain desired temperature.

CONVEYOR DRIVE

Closing the Conveyor Switch supplies 120 VAC to the

 

D.C. Motor Control Board at terminals L1 and L2. AC volts are converted

 

to DC volts and are supplied to the Conveyor Motor at terminals A+ and A-

 

. Adjustment of the Speed Control

S/N 2011821 and above

Potentiometer (5,000 ohm, 10 turn) will change resistance at Refer to

Page B15

terminals P1, P2, and P3 varying the DC voltage to the Conveyor Motor.

 

The speed of the conveyor motor will increase or decreaseas the

 

DC voltage from the board increases or decreases respectively. As the

 

motor turns, it drives both the reducer gear box and the Tach. Generator.

 

The tach. generator is a DC voltage generator which supplies a voltage to

 

the DC Motor Control Board and is used as a reference for maintaining a

 

constant conveyor speed.

TIME/TEMP DISPLAY

The secondary output of the Display Transformer, is supplied to terminals

 

1, 2, and 3 of the Time/Temp. Display. The secondary output of Trans-

 

former is nominally 12.5 to 15 VAC with a center tap. The voltage from

S/N 2011821 and above

center tap to each leg is 1/2 the secondary voltage.

 

Refer to Page B15

The speed side of the Time/Temp. Display uses a slotted disc (cemented

 

to tach. coupling) to break the infra-red light beam of the optical encoder

 

(mounted on gear motor), producing electrical pulses that are transmitted

 

to the display. The display converts these pulses into a read-out of

 

minutes and seconds.

 

The temperature portion of the Time/Temp Display uses a Thermistor

 

Probe to sense oven temperature. The thermistor outputs a resistance

 

proportional to the oven temperature. This resistance is then converted by

 

the display into a temperature reading.

AUTOMATIC COOL DOWN

When this oven is started, the time delay relay timing circuit is enabled,

 

permitting the oven fan to run for approximately 20 minutes after the oven

 

is shut off, to cool the oven. The Time Delay Relay will keep the coil of

 

Main Fan Relay closed, maintaining operation of the Main Fan Motor and

 

cooling fans.

CONVEYOR DRIVE

Closing the Conveyor Switch supplies 120 VAC, through a 3 Amp Fuse,

 

to the primary of the Conveyor Control Transformer. The secondary of this

 

Transformer supplies 10 VAC and 29 VAC to the Conveyor Control. The

 

Conveyor Control supplies voltage pulses to the Conveyor Motor. The

 

Conveyor Control Potentiometer varies the frequency of these pulses. The

 

motor speed will increase or decrease, as the frequency of the pulses

 

increase or decrease respectively.

TIME/TEMP DISPLAY

Closing the Main Fan Switch supplies 120 VAC to the primary

(STEPPER MOTOR DRIVE)

of the Time/Temp Transformer. The secondary output of the Trans

 

former, 12.5 to 15 VAC with a center tap, is supplied to terminals 1, 2,

 

and 3 of the Time/Temp Display. The Display works on a balanced input,

 

and center tap voltage to each leg must be 1/2 the total reading.

 

The speed side of the Time/Temp Display is supplied by the Conveyor

 

Control, with the frequency of the pulses to the Conveyor Motor. This

 

frequency is converted by the Time/Temp Display into a read out of

 

minutes and seconds.

10

Impinger II - 1100 Series Service Manual - International

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Contents MODEL 1100 SERIES SERVICE MANUALIMPINGER CONVEYOR OVENS 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 present on one side only, replace switch Burner Switchswitch. If switch is closed and voltage Gas Pressure SwitchCheck for proper line voltage to Flame Sensor Power Supply Ignition ControlFlame will not stay on Pilot lamp is on, butthen the problem is usually with thetemperature Power Supply improper adjustment. Also check for wornbearings. TheInstallation and Operations Manual Check power supply at the DCDC Gearmotor switch for 15 seconds, or if display stays on surge in the incoming power lines. To eliminatethis condition remove power from the time/temp required. This should eliminate the problem. IfTROUBLE SHOOTING GUIDE ELECTRIC OVENS This normally open switch should close when the Switch, HeatAir Pressure Switch adjustment knob to maximum temperature positionas follows MODEL Main fan runs after for proper readings. If these readings WITH POWER OFF: To check resistance of themaintenance. Also, most of the problems are not achieved, replace thermocoupleConveyor will not run TROUBLESHOOTING GUIDE ELECTRIC OVEN MODEL 1151 200 VAC THREE PHASE 60 HZRelay, Main Fan REFER TO PAGE REFER TO PAGE REFER TO PAGE Mercury Contactor Heater ElementsConveyor will not run S/N 2011383 and above REFER TO PAGE REFER TO PAGE 43STEPPER MOTOR DRIVE Conveyor will not run red wire and 1 white wire 12 VAC Power Supplyyellow wires, thermo 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 MOTOR, BURNER BLOWER This is part of the burner blower motor assemblyTO REMOVE THE BLOWER WHEEL FOR PERIODIC CLEANING TO REMOVE BLOWER MOTORAIR PRESSURE SWITCH Page Page 5.Loosen pipe union in piping assembly 1.Shut off power at the main breakerSOLENOID VALVE 1.Shut off power at main breaker HEATING ELEMENTS 1.Shut off power at main breakerIGNITION CONTROL 1.Shut off power at main breaker 4.Remove control compartment covers ORIFICE, MAIN BURNER2.Shut off gas at main line to the oven 5.Loosen 4 nuts holding manifold to burner capLAMP, PILOT BURNER LENS, PILOT LAMP 7.To adjust optical encoder OPTICAL ENCODER ASSEMBLY1.Remove gearmotor assembly see “GEARMOTOR” Above TACH. GENERATOR 1.Turn off power at main breakerD C MOTOR CONTROL BOARD 5.Reverse wires fastened to terminals T1 and T2 1.Turn off power and remove conveyor4.Reverse wires fastened to terminals A+ and A 1.Turn off power 2.Remove conveyorTRANSFORMER, TIME/TEMP. DISPLAY MODEL 1100 SERIES OVENS OVEN TEMPERATURE SWITCH, DISPLAY, SETOHMS 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 8.Remove top control compartment brace BURNER ALARM - REPLACEMENT4.Remove conveyor gear motor 10.Assemble in reverse orderLETTER GENERAL –1100SERIESDESCRIPTION GENERAL 1100 SERIES BLOW UP 1136,1150,1151,1160 Thru1163 Page LETTER CONTROL COMPARTMENT - FRONTMODELS 1152 THRU DESCRIPTIONCONTROL COMPARTMENT – FRONT 1152-1158BLOW UP LETTER CONTROL COMPARTMENT – REARDESCRIPTION CONTROL COMPARTMENT - REAR BLOW UP MODELS AND ABOVE MODELS 1130-1136,1150,1151S/N 2011383 AND ABOVE CONTROL COMPARTMENT – REAR BLOW UPMODELS 1160-1163S/N 2011978 AND ABOVE LETTER CONTROL COMPARTMENT – REARDESCRIPTION Page LETTER CONTROL COMPARTMENT – REARMODELS 1152 THRU 1158 S/N 2011821 AND ABOVE 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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