Lincoln 1004 Service Manual

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SERVICE MANUAL

(DOMESTIC)

IMPINGER CONVEYOR OVENS

MODEL SERIES 1000 - 1200 & 1400

Lincoln Foodservice Products, LLC

1111 North Hadley Road

Fort Wayne, Indiana 46804

United States of America

Phone : (800) 374-3004

U.S. Fax: (888) 790-8193 • Int’l Fax: (260) 436-0735

Technical Service Hot Line

(800) 678-9511

www.lincolnfp.com

1000SeriesSvc REV: 1/5/07

TABLE OF CONTENTS

TABLE OF CONTENTS..............................................................................................................................................2

SEQUENCE OF OPERATIONS 1000/1001/1004/1005/1200/1201/1204/1205 ........................................................3

SEQUENCE OF OPERATIONS 1022 / 1023 / 1202 / 1203 ......................................................................................4

SEQUENCE OF OPERATIONS 1040 / 1041 / 1240 / 1241 ......................................................................................5

SCHEMATIC / 1000, 1001 .........................................................................................................................................8

SCHEMATIC / 1004, 1005 .........................................................................................................................................9

SCHEMATIC / 1022, 1023 – S/N Q19077 & BELOW ..............................................................................................10

SCHEMATIC / 1022, 1023 – S/N Q19078 & ABOVE...............................................................................................11

SCHEMATIC / 1040, 1041 – S/N Q14279 & BELOW ..............................................................................................12

SCHEMATIC / 1040, 1041 – S/N Q14280 & ABOVE...............................................................................................13

SCHEMATIC / 1200, 1201 .......................................................................................................................................14

SCHEMATIC / 1202, 1203 S/N Q14790 & BELOW .................................................................................................15

SCHEMATIC / 1202, 1203 S/N Q14791 & ABOVE..................................................................................................16

SCHEMATIC / 1204, 1205 .......................................................................................................................................17

SCHEMATIC / 1240, 1241 – S/N Q14279 & BELOW ..............................................................................................18

SCHEMATIC / 1240, 1241 – S/N Q14280 & ABOVE...............................................................................................19

TROUBLESHOOTING GUIDE 1000 & 1200 ...........................................................................................................20

GAS OVENS .........................................................................................................................................................20

TROUBLESHOOTING GUIDE.................................................................................................................................25

ELECTRIC OVENS MODEL SERIES 1000 & 1200 .............................................................................................25

REMOVAL, INSTALLATION & ADJUSTMENTS .....................................................................................................32

PARTS / MODEL SERIES 1000 & 1200 - GENERAL..............................................................................................60

BLOW UP / 1000, 1200 – GENERAL.......................................................................................................................61

PARTS / ACCESS DOOR & 1050 DOOR................................................................................................................62

BLOW UP / ACCESS DOOR & 1050 DOOR ...........................................................................................................63

PARTS / MODEL 1000,1001,1050,1051,1004, &1005 – S/N 100 TO 4389 ............................................................64

BLOW UP / 1000, 1001, 1050, 1051, 1004, & 1005 S/N 100 TO 4389 ...................................................................65

PARTS / MODEL 1000,1001,1004, AND 1005 S/N 4390 & ABOVE .......................................................................66

BLOW UP 1000, 1001, 1004, 1005 S/N 4390 & ABOVE.........................................................................................67

PARTS / 1022-1023..................................................................................................................................................68

BLOW UP / 1022, 1023 ............................................................................................................................................69

PARTS / 1040-1041..................................................................................................................................................70

BLOW UP / 1040, 1041 ............................................................................................................................................71

PARTS / 1200, 1201, 1204 AND 1205.....................................................................................................................72

BLOW UP / 1200, 1201, 1204, 1205........................................................................................................................73

PARTS / 1202-1203..................................................................................................................................................74

BLOW UP / 1202, 1203 ............................................................................................................................................75

PARTS / 1240-1241..................................................................................................................................................76

BLOW UP / 1240, 1241 ............................................................................................................................................77

PARTS / OVEN BACK - GAS ...................................................................................................................................78

BLOW UP / OVEN BACK – GAS .............................................................................................................................79

PARTS / OVEN BACK- ELECTRIC..........................................................................................................................80

BLOW UP / OVEN BACK – ELECTRIC ...................................................................................................................81

PARTS / CONVEYOR MOTOR ASSEMBLY S/N 4390 & ABOVE ..........................................................................82

BLOW UP / CONVEYOR MOTOR ASSEMBLY S/N 4390 & ABOVE .....................................................................83

PARTS / SERIES 1000 – CONVEYOR....................................................................................................................84

BLOW UP / SERIES 1000 CONVEYOR ..................................................................................................................85

PARTS / SERIES 1200 - CONVEYOR CONTROL..................................................................................................86

BLOW UP / SERIES 1200 – CONVEYOR CONTROL ............................................................................................87

PARTS / SERIES 1200 – CONVEYOR....................................................................................................................88

BLOW UP / SERIES 1200 – CONVEYOR ...............................................................................................................89

Impinger I -–1000 Series Service Manual - Domestic

SEQUENCE OF OPERATIONS 1000/1001/1004/1005/1200/1201/1204/1205

MODEL 1000 - 120/230 VAC - 60HZ - NATURAL GAS MODEL 1001 - 120/230 VAC - 60HZ - L.P. GAS MODEL 1004 - 120/230 VAC - 60HZ - NATURAL GAS MODEL 1005 - 120/230 VAC - 60HZ - L.P. GAS MODEL 1200 - 120/230 VAC - 60HZ - NATURAL GAS/DUAL BELT MODEL 1201 - 120/230 VAC - 60HZ - L.P. GAS/DUAL BELT MODEL 1204 - 120/230 VAC - 60HZ - NATURAL GAS/DUAL BELT MODEL 1205 - 120/230 VAC - 60HZ L.P.GAS/DUAL BELT

POWER SUPPLY Electrical Power to be supplied to the Oven by a four conductor service. . Voltage

from the black conductor to the white conductor is 120 VAC. Black conductor is Hot Red conductor is Hot White conductor is Dedicated Neutral

Green conductor is Ground CONTROL BOX AUTO COOL DOWN

MAIN FAN CIRCUIT Electrical power is permanently supplied to the normally open contacts of the Double

TRANSFORMER (12.6 VAC)

BURNER CIRCUIT Closing the Fan Switch and the normally open Burner Switch supplies 120 VAC

CONVEYOR DRIVE(S/N 100 to 4389)

(S/N 4390 and UP) Closing the fan switch and the normally open conveyor switch supplies 120 VAC to

When the temperature in the Control Box reaches 120°F + 3°, the Cooling Fan

Thermostat will switch power to the Control Box Cooling Fan. The Thermostat will

interrupt power to the Cooling Fan when the Control Box temperature falls to 100°F +

3°.

Pole Main Fan Relay, the Cooling Fan Thermostat, the normally open Main Fan

Switch, and the normally open Cool Down Thermostat (thermostat closes at 160°F

and opens at 140°F). Closing the Main Fan Switch energizes the coil of the Relay.

The normally open contacts now close, energizing the Main Fan Motor through (2)

10A fuses, and the Cooling Fan. Closing the Fan Switch also supplies power to the

Hour Meter (hour meter discontinued after S/N 3484), the 12.6 VAC Transformer, the

Burner and Conveyor Switches.

Upon closure of the Fan Switch, 120 VAC is supplied to the primary of the 12.6 VAC

Transformer. The Transformer steps the voltage down to 12.6 VAC (normally 13 to

14 VAC) with a center tap, and supplies power to the Time/Temp Display. The

voltage from each leg of the Transformer's secondary to the center tap should be

one half of the secondary voltage.

through the Air Pressure Switch, to the normally open contacts of the Burner Motor

Relay, and the primary of the 24 VAC Step Down Transformer. The Transformer

secondary supplies 24 VAC (through a 1A fuse on Model 1004 and 1005) to the

Relay Coil (the normally open contacts close within 30 seconds), and the normally

open Centrifugal Switch. When the Relay contacts close, the Burner Blower Motor is

energized. As this motor reaches approximately1600 R.P.M., its internal centrifugal

switch closes, supplying 24 VAC to the Gas Control Valve. When the Gas Control

Valve is supplied with 24 VAC the pilot valve is energized, and the ignitor circuit is

energized. Ignition should now occur. After pilot flame is proven, the main gas valve

is energized. The Burner Indicator Light is also energized.

Closing the Fan Switch and the normally open Conveyor Switch supplies 120 VAC

through a 3A Fuse, to the Motor Control Board. AC volts are converted to D.C. volts

and are supplied to the Conveyor motor at board terminals A1 and A2 through a

D.P.D.T. Reversing Switch. Adjustment of the Speed Control Potentiometer (500

ohm, 10 turn) will change resistance at terminals S1, S2, and S3 varying the D.C.

voltage to the motor. The speed of the Conveyor Motor will increase or decrease as

the D.C. voltage from the Motor Control Board increases or decreases respectively.

the Motor Control Board. AC volts are converted to DC volts and are supplied to the

Conveyor Motor at terminals A+ and A-. Adjustment of the Speed Control

Potentiometer (5,000 ohm 10 turn ) will change resistance at terminals P1, P2, and

P3 varying the DC voltage to the motor. The speed of the conveyor motor will

increase or decrease as the DC voltage from the board increases or decreases

respectively. As the motor turns, it drives both the reducer gearbox and the tach.

Impinger I -–1000 Series Service Manual - Domestic

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.

NOTE

TIME TEMP DISPLAY The Time/Temp. Display is energized when the Fan Switch is closed, supplying120

The 1200 Series Ovens utilize 2 complete conveyor drive systems.

VAC to the primary of the 12.6 volt Transformer The secondary output of the

transformer, normally 13 to 14 VAC (depending on input), with a center tap is

supplied at terminals 1,2, and 3 of the Time/Temp. Display. The center tap is

terminal 2. 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 uses a slotted disc (cemented to tach.

coupling) to break the infra-red light beam of the optical switch (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 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.

NOTE: The 1200 Series Ovens use a Double Pole Double Throw Switch to connect

the two Optical Encoder Assemblies to the Time/Temp Display. By activating the

switch, either the front or rear belt speed can be shown by the Time/Temp Display.

SEQUENCE OF OPERATIONS 1022 / 1023 / 1202 / 1203

MODEL 1022 - 120/208 VAC - 3 PHASE MODEL 1023 - 120/240 VAC - 3 PHASE MODEL 1202 - 120/208 VAC - 3 PHASE - DUAL BELT MODEL 1203 - 120/240 VAC - 3 PHASE - DUAL BELT

POWER SUPPLY Electrical Power to be supplied to the Oven by a five conductor service. Voltage from

the black conductor to the white conductor is 120 VAC.

Black conductor is Hot Red conductor is Hot Orange conductor is Hot White conductor is Dedicated Neutral Green conductor is Ground

MAIN FAN CIRCUIT Electrical power is permanently supplied through 6, 50A fuses to the normally open

contacts of the Mercury Contactors. Power is also supplied through 2, 15A fuses to

the normally open contacts of the Double Pole Main Fan Relay, the Double Pole

Main Fan Switch, and the normally open Cool-Down Thermostat (thermostat closes

at 160°F and opens at 140°F.) Closing the Main Fan Switch energizes the coil of the

Main Fan Relay. The normally open contacts now close, energizing the Main Fan

Motor, and the Control Box Cooling Fan. Closing the Fan Switch also supplies power

to the Hour Meter (hour meter discontinued after S/N 3484), the 12.6 VAC

Transformer, the Heat and Conveyor Switches. TRANSFORMER (12.6 VAC)

HEAT CIRCUIT Closing the Fan Switch and the normally open Heat Switch supplies 120 VAC

TEMPERATURE CONTROL

Upon closure of the Fan Switch, 120 VAC is supplied to the primary of the 12.6 VAC

Transformer. The Transformer steps the voltage down to 12.6 VAC (normally 13 to

14 VAC) with a center tap, and supplies power to the Time/Temp Display. The

voltage from each leg of the Transformer's secondary to the center tap should be

one half of the secondary voltage.

through the Air Pressure Switch and the normally closed Hi-Limit Thermostat

(manually re-settable, opens at 190°F) the 3A Fuse, to the L1 terminal of the

Temperature Control Board, the coils of the Mercury Contactors, and to the Heat

Indicator Light.

When the Heat Switch is closed, 120 VAC is supplied to the Temperature Control.

The Temperature Control Potentiometer (2.5K ohm) is adjusted to desired

temperature. The Thermocouple will provide varying millivolts to the Temperature

Controller. The Temperature Controller switches the L2 line of the Contactor coils at

intermittent intervals to maintain desired temperature.

Impinger I -–1000 Series Service Manual - Domestic

CONVEYOR DRIVE (S/N 100 to 4389)

(S/N 4390 and UP) Closing the fan switch and the normally open conveyor switch supplies 120 VAC to

NOTE* The 1200 Series Ovens utilize 2 complete conveyor drive systems. TIME/TEMP DISPLAY The Time/Temp Display is energized when the Fan Switch is closed, supplying 120

NOTE* The 1200 Series Ovens use a Double Pole Double Throw Switch to connect the two

Closing the Fan Switch and the normally open Conveyor Switch supplies 120 VAC

through a 3A Fuse, to the Motor Control Board. AC volts are converted to D.C. volts

and are supplied to the Conveyor Motor at board terminals A1 and A2 through a

D.P.D.T. Reversing Switch. Adjustment of the Speed Control Potentiometer (500

ohm, 10 turn) will change resistance at terminals S1, S2, and S3 varying the D.C.

voltage to the motor. The speed of the Conveyor Motor will increase or decrease as

the D.C. voltage from the Motor Control Board increases or decreases respectively.

the Motor Control Board. AC volts are converted to DC volts and are supplied to the

Conveyor Motor at terminals A+ and A-. Adjustment of the Speed Control

Potentiometer (5,000 ohm 10 turn) will change resistance at terminals P1, P2, and

P3 varying the DC voltage to the Conveyor Motor. The speed of the conveyor motor

will increase or decrease as the DC voltage from the board increases or decreases

respectively. As the motor turns, it drives both the reducer gearbox 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.

VAC to the primary of the12.6 volt Transformer. The secondary output of the

transformer, normally 13 to 14 VAC (depending on input), with a center tap is

supplied to terminals 1,2, and 3 of the Time/Temp Display. The center tap is terminal

2. 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 uses a slotted disc (cemented to tach.

coupling) to break the infra-red light beam of the optical switch (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 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.

Optical Encoder Assemblies to the Time/Temp. Display. By activating the switch,

either the front or rear belt speed can be shown by the Time/Temp. Display.

SEQUENCE OF OPERATIONS 1040 / 1041 / 1240 / 1241

MODEL 1040 - 120/230 VAC - 60HZ - NATURAL GAS MODEL 1041 - 120/230 VAC - 60HZ - L.P. GAS MODEL 1240 - 120/230 VAC - 60HZ - NATURAL GAS/DUAL BELT MODEL 1241 - 120/230 VAC - 60HZ - L.P. GAS/DUAL BELT

POWER SUPPLY Electrical Power to be supplied to the Oven by a four conductor service. Voltage

from the black conductor to the white conductor is 120 VAC.

Black conductor is Hot Red conductor is Hot White conductor is Dedicated Neutral

Green conductor is Ground CONTROL BOX AUTO COOL DOWN

MAIN FAN CIRCUIT Electrical power is permanently supplied to the normally open contacts of the Double

When the temperature in the Control Box reaches 120°F ± 3°, the Cooling Fan Thermostat will switch power to the Control Box Cooling Fan. The Thermostat will interrupt power to the Cooling Fan when the Control Box temperature falls to 100°F + 3°.

Pole Main Fan Relay, the Cooling Fan Thermostat, the normally open Main Fan Switch, and the normally open Cool Down Thermostat (thermostat closes at 160°F and opens at 140°F). Closing the Main Fan Switch energizes the coil of the Relay. The normally open contacts now close, energizing the Main Fan Motor through two 10A fuses, and the Cooling Fan. Closing the Fan Switch also supplies power to the

12.6 VAC Transformer, the Burner and Conveyor Switches.

Impinger I -–1000 Series Service Manual - Domestic

TRANSFORMER (12.6 VAC)

BURNER CIRCUIT Closing the Fan Switch and the normally open Burner Switch supplies 120 VAC

TEMPERATURE CONTROL

CONVEYOR DRIVE (S/N Q14790 & Below, 1200 series S/N Q14973 & Below 1000 series)

(S/N Q14791 & Above, 1200 series refer to Pg. 5 & 6 S/N Q14974 & Above, 1000 series refer to Pg. 5 & 6 (STEPPER) NOTE: The 1200 Series Ovens utilize 2 complete conveyor drive systems. TIME/TEMP DISPLAY(S/N Q14790 & Below, 1200 series S/N Q14973 & Below 1000 series)

(S/N Q14791 & Above, 1200 series refer to Pg. 5 & 6 S/N Q14974 & Above, 1000 series refer to Pg. 5 & 6 (STEPPER)

NOTE* The 1200 Series Ovens use a Double Pole Double Throw Switch to connect the two

CONVEYOR DRIVE Closing the Oven Fan Switch supplies 120 VAC, through the Power Transformer, to

Upon closure of the Fan Switch, 120 VAC is supplied to the primary of the 12.6 VAC Transformer. The Transformer steps the voltage down to 12.6 VAC (normally 13 to 14 VAC) with a center tap, and supplies power to the Time/ Temp. Display. The voltage from each leg of the Transformer's secondary to the center tap should be one half of the secondary voltage.

through the Air Pressure Switch, to the Temperature Control Board, the normally open contacts of the Burner Motor Relay (Burner Motor Relay discontinued after S/N

14791) and the primary of the 24 VAC Transformer. The transformer's secondary supplies 24 VAC to the burner motor relay coil (the normally open contacts close within 30 seconds), and the normally open Centrifugal Switch. When the relay contacts close, the Burner Blower Motor is energized. As this motor reaches approx. 1,600 R.P.M its internal centrifugal switch closes, supplying 24 VAC to the Gas Control Valve. When the Gas Control Valve is supplied with 24 VAC, the pilot valve is energized, and the igniter circuit is energized. Ignition should now occur. After pilot flame is proven, the Main Gas Valve is energized. The Burner Indicator Light is also energized. Closing the Fan Switch and Burner Switch supplies 120 VAC to the Temperature Control Board. The 1K or 1000 ohm Temperature Potentiometer is adjusted to desired temperature. The Thermocouple will provide varying millivolts to the Temperature Controller. The Temperature Controller supplies 120 VAC to the Solenoid Valve at intermittent intervals to maintain desired temperature. Closing the fan switch and the normally open conveyor Switch supplies 120 VAC to the Motor Control Board. AC volts are converted to DC volts and are supplied to the Conveyor Motor, at terminals A+ and A-. Adjustment of the Speed Control Potentiometer (5,000 ohm 10 turn) will change resistance at terminals P1, P2, and P3 varying the DC voltage to the Conveyor Motor. The speed of the conveyor motor will increase or decrease as the DC voltage from the board increases or decreases respectively. As the motor turns, it drives both the reducer gearbox 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.

The Time/Temp. Display is energized when the Fan Switch is closed, supplying 120 VAC to the primary of the12.6 volt Transformer. The secondary output of the transformer, normally 13 to 14 VAC (depending on input), with a center tap, is supplied to terminals 1,2, and 3 of the Time/Temp. Display. The center tap is terminal 2. 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 uses a slotted disc (cemented to tach. coupling) to break the infrared light beam of the optical switch (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 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.

Optical Encoder Assemblies to the Time/Temp. Display. By activating the switch, either the front or rear belt speed can be shown by the Time/Temp Display .

the normally open Conveyor Switch. 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 Control. 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.

Impinger I -–1000 Series Service Manual - Domestic

TIME TEMP DISPLAY Closing the Oven Fan Switch supplies 120 VAC, through the Power Transformer, to

the primary of the Time/Temp. Transformer. The secondary output of the Transformers, 12.5to 15 VAC with a center tap, is supplies to terminals 1, 2, and3 of the Time/Temp. Display. The display works on a balanced input, and the center tap voltage to each leg must be 1/2 the total reading.

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1000, 1001

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1004, 1005

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1022, 1023 – S/N Q19077 & BELOW

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1022, 1023 – S/N Q19078 & ABOVE

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1040, 1041 – S/N Q14279 & BELOW

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1040, 1041 – S/N Q14280 & ABOVE

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1200, 1201

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1202, 1203 S/N Q14790 & BELOW

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1202, 1203 S/N Q14791 & ABOVE

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1204, 1205

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1240, 1241 – S/N Q14279 & BELOW

Impinger I -–1000 Series Service Manual - Domestic

SCHEMATIC / 1240, 1241 – S/N Q14280 & ABOVE

Impinger I -–1000 Series Service Manual - Domestic

TROUBLESHOOTING GUIDE 1000 & 1200

GAS OVENS

SYMPTOM POSSIBLE CAUSE EVALUATION

Oven fan will not run

NOTE:

No Main Fan Cool Down

No Control Box Cooling(For ovens equipped with Control Box Cooling Fan)

NOTE:

No automatic control box cooling (For ovens equipped with control box cooling fan)

Control box cooling fan continues to run Oven will not heat

Incoming Power Supply Check breakers/ Reset if required / Call Power Co.

if needed.

(Export Ovens) For some export ovens, there is a control circuit

step-down transformer. This transformer steps down supply voltage to 120 VAC. If main fan will not run, the secondary of this transformer must be checked for 120 VAC output. Check specific oven

model schematic for circuit location. Oven Fan Fuse(s) Check and/or Replace Fuse Holder Check and/or Replace Fan Switch Check continuity between switch terminals. Main Relay Check continuity to 120 VAC coil. Check for power

to relay coil (120 VAC). Check for 208/240 VAC to

relay terminals. Visually check for contact pull-in. Fan Motor Check for opens, shorts, or grounds. WITH

POWER OFF: Turn Fan Blade to check for locked

rotor. Capacitor Check for opens, shorts, or grounds. Cool Down Thermostat Check cool down thermostat (thermostat closes at

160°F and opens at 140°F). Check for power (120

VAC) at cool down thermostat. With the cool down

thermostat pre-heated, check for continuity. If

switch is open, replace. Main Fan Relay

(Export Ovens) Axial Cooling Fan

Incoming Power Supply Check breakers/Reset if needed. Check for

Cooling Fan Thermostat Check cooling fan thermostat (thermostat closes at

Axial Cooling Fan Check for 120 VAC to cooling fan, if present and

Cooling Fan Thermostat See "Cooling Fan Thermostat"

Gas Supply Check for adequate gas supply to oven. Manual Gas Shut-off Valve Check to see that manual shut-off valve is open. Fan Switch Check to see that fan switch is "on". Main Oven Fan Check if main oven fan is operating. If not, refer to

Burner Switch Check for 120 VAC to neutral on both sides of

Check for power to Main Fan Relay. Visually check

for contact pull in.

(For ovens equipped with a control circuit step-

down transformer, the supply voltage for the

cooling fan is 240 VAC.)

WITH POWER OFF: check for locked rotor. Check

for power (120 VAC) to cooling fan. If 120 VAC is

present at the fan motor and the fan does not run,

replace fan assembly.

incoming power (120 VAC)at cooling fan

thermostat.

120°F and opens at 100°F). With cooling fan

thermostat pre-heated, check for continuity. If

switch is open, replace.

fan does not run, replace fan.

"Oven fan will not run". Page 20.

switch. If switch is closed and 120 VAC is present

on one side only, replace the switch.

Impinger I -–1000 Series Service Manual - Domestic

Air Pressure Switch Check for 120 VAC on both sides of switch. If

Transformer, 24 VAC Check for 120 VAC to primary of transformer.

NOTE:

(Model 1004 & 1005) For oven models 1004 and 1005, there is a 1 Amp

Burner Motor Relay Delete burner motor relay refer to Section D, Page

Burner Blower Motor Check for 120 VAC supply to burner blower motor.

Centrifugal Switch of Burner Blower Motor

For ovens with Johnson Controls

Ignition Control and Valve Assembly

Ignition Control

(For ovens with Honeywell Ignition control, See Pg. 21)

No Pilot If the ignition control is supplied with 24 VAC, and

Pilot Shut-off Valve Check to see that pilot shut-off valve is open (shut-

Pilot Tube Check for gas pressure at pilot tube. Disconnect

Pilot Orifice If there is gas pressure at the pilot tube, check the

Burner Ignitor Check the burner ignitor head for any obstructions,

Impinger I -–1000 Series Service Manual - Domestic

voltage present on one side only, check for air tube

blockage. Adjust air switch. If above fails, replace

air pressure switch.

Check for 24 VAC from secondary of transformer. If

there is primary voltage, but no secondary voltage,

replace transformer.

fuse located between the 24 VAC output from the

transformer and the coil of the burner motor relay. If

there is 24 VAC output from the transformer, but no

burner motor relay action, check fuse and fuse

holder. Replace as necessary.

34.

If 120 VAC is present and motor does not run,

replace motor. WITH POWER OFF: turn blower

wheel to check for locked rotor.

Check for 24 VAC output from secondary of

transformer. If voltage is present, check for 24 VAC

at pin 6 and the ground bar on ignition control and

valve assembly. If the burner blower motor is

running and there is no voltage at pin 6 and the

ground bar on the ignition control valve, replace the

burner blower motor.

Check for 24 VAC supply to the ignition control and

valve assembly at pin 6 and the ground bar. If

voltage is present, check for 24 VAC across pin #1

and the ground bar (pilot valve). If voltage is not

present, replace electronic control package. If the

pilot valve is energized, check to see that the high

voltage ignitor circuit is also energized. To check,

disconnect the ignitor lead from the bottom of

ignition control. Place female terminal of ignitor

lead approximately 1/8" from terminal post on

ignition control. Spark should jump the 1/8" gap. If

no spark is present, replace ignition control.

the pilot valve (internal to valve assembly) and

ignitor circuits are energized, visually check for pilot

flame. This may be done by opening the small

inspection door on the end of the burner, or by

opening the main oven door and looking under the

lower finger housings on the right side of the oven.

If no pilot flame is visible, check the following.

off valve is located between ignition control and

valve assembly and burner.)

pilot tube at burner and connect manometer to pilot

tube. If no gas pressure is present, check for

blockage in pilot tube or pilot shut-off valve. If these

are clear, and there is gas supplied to the oven,

replace the ignition control and valve assembly.

pilot orifice for obstructions. Replace as need

also check for frayed or broken wire, any type of

damage to spark gap (.100 in. 2.5 m.m.) If there is

visible damage, replace ignitor assembly.

Pilot flame but no main flame

For ovens with Honeywell ignition control

No Pilot

Flame Sensor (There should be a visible pilot flame at this time.)

To check for proper flame sensor operation,

connect a digital multimeter (capable of measuring

D. C. microamperes) in series between the flame

sensor wire (normally connected to terminal #4)

and terminal #4. NOTE: This is a current

measurement and the meter must be connected in

series. This procedure is for checking the pilot

flame only. Remove main valve wire (Red) from

terminal #3 on ignition control. With a visible pilot

flame, the current readings should be as follows:

Johnson G-65 control, 0.2 micro amp. D.C.

minimum/Johnson G-60 control, 0.7 micro amp.

D.C. minimum. If these values are not achieved,

replace flame sensor. Also check for any type of

damage to flame sensor wire and connections. Ignition Control and Valve Assembly

If there is a pilot flame, and there is sufficient micro

amp. current at terminal #4, check for 24 VAC

that the main valve (internal to valve assembly) has

opened. Connect a manometer to the manifold gas

pressure tap located on the back side of the ignition

control and valve assembly. If no gas is present,

replace ignition control and valve assembly. Centrifugal Switch of Burner Blower Motor

NOTE:

Check for 24 VAC output from secondary of

transformer. If voltage is present, check for 24 VAC

at terminals marked "24V" and "24V gnd" on

Ignition Control. If the Burner Blower Motor is

running and there is no voltage at terminals 24V

and 24V gnd on the ignition control, replace the

Burner Blower Motor.

These Ignition Controls have a 30 second pre-

purge(Delay) and a 15 second lock-out time – The

Ignition Control will try for ignition for 15 seconds

and then shut-off. To Re-try for ignition, turn off

burner switch, wait 30 seconds and re-try ignition. Ignition Control

Check for 24 VAC supply to ignition control at

terminals "24V" and "24V gnd". If voltage is

present, check for 24V at terminal "P.V. (Pilot

Valve) and "gnd". If voltage is not present, replace

Ignition Control. If the pilot valve is energized,

check to see that the high voltage ignitor circuit is

also energized. To check, disconnect the ignitor

lead from the ignition control. Place the terminal of

ignitor lead approximately 1/8" from terminal post

on Ignition Control. Spark should jump the 1/8"

gap. If no spark is present, replace ignition control.

If the ignition control is supplied with 24 VAC and

the pilot valve (in gas valve) and ignitor circuits Pilot Shut-off Valve If no pilot flame is visible, check to see that the pilot

shut-off valve is open(shut-off valve is located

between gas valve and burner). Pilot Tube Check for gas pressure at pilot tube. Disconnect

pilot tube at burner and connect manometer to pilot

tube. If no gas pressure is present, check for

blockage in pilot tube or pilot shut-off valve. Pilot Orifice If there is gas pressure at the pilot tube, check the

pilot orifice for obstructions. Replace as needed. Burner Ignitor Check the burner ignitor head for any obstructions,

also check for frayed or broken wire, any type of

damage to spark gap (.100 in. 2.5 mm) If there is

visible damage, replace ignitor assembly.

Impinger I -–1000 Series Service Manual - Domestic

Pilot flame but no main flame

Spark Ignitor (Flame Sensor) (There should be a visible pilot flame at this time).

NOTE: The Honeywell Ignition Control uses the

spark ignitor as the flame sensor. If spark

continues, check for proper ground connections at

Ignition Control. Check pilot orifice for any partial

blockage. If the above checks OK, replace ignition

control. If spark stops when pilot is lit, check for 24

VAC across M.V. - M.V/ P.V. terminals, if voltage is

not present, replace ignition control. If voltage is

present at terminals M.V. - M.V./P.V., the indicator

light on the control panel should be on, verify that

the main valve has opened, connect manometer to

manifold gas pressure tap(located on the

Red Indicator Light is on, but no main flame(For ovens with

mechanical thermostat) (For ovens with Electronic Temperature Control)

Temperature Control Valve (Robert Shaw) Main Orifice Check for blockage of main orifice. If there is no

Temperature Control Potentiometer

Check for gas supply at temperature control. Check

for temperature control set above 300°F.

blockage to the main orifice, replace the

temperature control.

Check for 120 VAC across L1 and L2on

temperature control board. Potentiometer (1000

ohm,1 turn) WITH POWER OFF: check ohms

across red and black leads, the ohm reading

should be 0 to1000 ohms as the dial is turned.

From green to red, the reading should be 1000

ohms steady throughout the full turn of the dial.

NOTE: Ovens S/N Q18037 and above, the potentiometer is internal to temperature control. Proceed to next component.

Thermocouple Probe Remove thermocouple leads from the temperature

control board, and measure the millivolt output of

these leads. Refer to chart on page 38 in the

adjustment section for proper readings. Temperature Control Turn temperature control dial to full "on" position.

Measure for 120 VAC across terminals "N.O." and

"L2", if voltage is not present; replace control. Solenoid Valve If voltage is present at terminals "N.O."and "L2",

check for voltage at solenoid valve. If voltage is

present, listen for valve to open and close. Also,

check for opens and shorts in coil. If solenoid valve

is defective, replace

Intermittent Heating Both the main fan motor and burner blower motor

are equipped with thermo-protection and will cease

to operate when not cooled properly. This can

cause the units to cycle on and off intermittently.

Also, most of the problems listed under "oven will

not heat" can cause intermittent failures.

For continuing intermittent problems, a series of test lights may be made and installed in the ovens. The lights will allow the customer to advise the service technician a trouble code when the oven fails.

The lights should be connected in the following manner:

Light#l attached in 120VAC line after Air Pressure Switch. Light#2 attached after 120VAC contacts of Burner Motor Relay (or, refer to Bulletin #028 for Relay Removal). Light#3 in 24VAC Burner Transformer Secondary. Light#4 in 24VAC at terminal #6 of Johnson control valve or "24V" on Honeywell Control. Light#5 in 24VAC at terminal #1 of Johnson control valve or "PV" on Honeywell Control. Light#6 in 24VAC at terminal #3 of Johnson control valve or "MV" on Honeywell Control. CODE: All lights off - lights of main power, main fan off, air pressure switch out. 1 on 2 off 3 on 4 off 5 off 6 off - Burner Motor Relay bad.

Impinger I -–1000 Series Service Manual - Domestic

1 on 2 on 3 on 4 off 5 off 6 off - Burner Motor Centrifugal Switch bad. 1 on 2 on 3 on 4 on 5 off 6 off - Ignition Control bad. 1 on 2 on 3 on 4 on 5 on 6 off - Pilot Shield missing or warped, Flame Sensor bad, Pilot

- Orifice plugged, or Gas Valve bad. 1 on 2 on 3 on 4 on 5 on 6 on - Unit still not working Main Orifice plugged, Gas Valve bad,

- Temperature Control bad.

- However, Main Orifice would not be intermittent problem.

Impinger I -–1000 Series Service Manual - Domestic

TROUBLESHOOTING GUIDE

SYMPTOM POSSIBLE CAUSE EVALUATION

Oven fan will not run

NOTE:

No Main Fan Cool Down

No control box cooling

Oven will not heat

NOTE:

ELECTRIC OVENS MODEL SERIES 1000 & 1200

Incoming Power Supply Check breakers/Reset if required/ Call Power Co. if

needed. (Export Ovens) For some export ovens, there is a control circuit

step-down transformer. This transformer steps

down supply voltage to 120 VAC. If main fan will

not run, the secondary of this transformer must be

checked for 120 VAC output. Check specific oven

to the relay coil (120 VAC). Check for 208/220/240

VAC to relay terminals. Visually check for contact

pull-in Fan Motor Check for opens, shorts, or grounds. WITH

POWER OFF: Turn Fan Blade to check for locked

rotor. Capacitor Check for opens, shorts, or grounds. Cool Down Thermostat Check cool down thermostat (thermostat closes at

160°F and opens at 140°F). Check for power (120

VAC) at cool down thermostat. With cool down

thermostat pre-heated, check for continuity. If

switch is open, replace. Main Fan Relay Check for power to main fan relay. Visually check

for contact pull in. Axial Cooling Fan WITH POWER OFF: turn the fan blade to check for

locked rotor. Check for power (120 VAC) to cooling

fan. If 120 VAC is present at the fan motor and the

fan does not run, replace fan assembly. Main Oven Fan Check if main oven fan is operating. If not, refer to

"Oven fan will not run." Heat Switch Check for continuity between switch terminals with

switch on. Replace if defective. Air Pressure Switch Check for 120 VAC on both sides of switch. If

voltage present on one side only, check for air tube

blockage, adjust air switch. If above fails, replace

air pressure switch. Hi Limit Thermostat Terminals are normally closed. If open, reset and

test oven for proper operation. If thermostat will not

hold for maximum oven temperature, and oven is

not exceeding temperature dial setting, replace

thermostat (rated at 190°F). Hi Limit Thermostat (Model 1032)

3 Amp Temperature Control Fuse Fuseholder Check and/or replace.

Terminals are normally closed. If open, reset and

test oven for proper operation. If thermostat will not

hold for maximum oven temperature, and oven is

not exceeding temperature dial setting. Replace

the thermostat. Check for proper location of

sensing bulb in its spring holder. If hi-limit is still

tripping, replace (rated for 368°C).

Check and/or Replace

Impinger I -–1000 Series Service Manual - Domestic

Oven heats with switch off

Conveyor will not run (S/N 100-4389)

Temperature Control Board Check for 120 VAC input to temperature control

board. If not present, check wiring from fuse holder

to temperature control board. Turn the temperature

adjustment dial to the maximum temperature

position Check for 120 VAC at coil of mercury

contactor(s). Next, short the leads of thermocouple

on the temperature control board, check for 120

VAC at coil of mercury contactor(s). If voltage is

not present, replace temperature control board. If

voltage is present proceed. Temperature Control Potentiometer

Potentiometer is 0 to 2.5K ohm. WITH POWER

OFF: remove the leads from the temperature

control board terminals 1, 2, and 3 and measure

ohms from black to white leads. The ohm reading

should be 0 to approximately 2.5K ohms as the dial Thermocouple Probe Remove thermocouple leads from the temperature

control board, and measure the millivolt output of

the leads. Refer to chart in adjustment section for

proper millivolt readings. Mercury Contactor(s) Check for 120 VAC to the contactor coil. If voltage

is present and contactor will not activate, replace

the contactor(s). Also check each contactor for

proper high voltage input and output. 50 Amp Fuses If there is no high voltage input to the mercury

contactor(s), check the 50 amp fuses and replace if

necessary. Heater Elements Check the Amp. draw on each hot leg for proper

load. Check the specifications plate for rating

information. If the Amp. draw is low or high, check

the individual elements for opens, shorts, and

proper resistance . To check resistance of the

elements, turn off the power! Remove all leads

from the elements and use an accurate digital

VOM. The element resistance should be as

follows: 208V - 9.8 ohms approx. 220V - 10.5 ohms

approx. 240V - 13 ohms approx. If all readings are

not correct, replace elements as needed. Mercury Contactor(s) The mercury contactor has probably malfunctioned

in the closed position. If there is no voltage to the

operating coil, but there is high voltage at the

contactor output, replace the mercury contactor. Voltage Supply Check incoming voltage supply at line 1 to neutral.

There should be a voltage reading of 120 VAC. If

not present, check breakers. 3 Amp Fuse This conveyor fuse is located on the front panel.

Replace if defective. Fuse Holder Check and/or Replace. Conveyor Switch Same procedure as for fan switch. D. C. Motor Control Board Check for 120 VAC input to D. C. control board

across L1 and L2. Check the 3 amp fuse on the D.

C. control board. Check for D. C. voltage at

terminal F1 and F2. Voltage should be 10 VDC +

10 steady. If this voltage is not present, replace D.

C. control board. Check for D. C. voltage output to

the motor across terminals A1 and A2 (this voltage

should be approx. 125 VDC at maximum conveyor

motor speed).

Impinger I -–1000 Series Service Manual - Domestic

Speed Control Potentiometer This is a 0 to 400 ohm or 0 to 500 ohm, 10-turn

potentiometer. WITH POWER OFF: remove the

red, white, and black leads from terminals S1, S2,

S3. With a digital multimeter, check the ohm

reading across the red to black leads. This ohm

reading should be a steady 400-ohm, or 500-ohm,

through the entire 10-turn rotation of the

potentiometer. Check for shorts or opens or

unsteady, ohm reading, if potentiometer is

defective, replace. If the potentiometer checks OK,

and there is no output at terminals A1 and A2,

replace the D. C. control board. Reversing Switch If there is D. C. voltage output from the motor

control board, but the conveyor drive motor is not

running, check the D.P.D.T. reversing switch. Conveyor Drive Motor Check the conveyor drive sprocket for tightness.

Disconnect the motor, check the red and black

motor leads for opens, shorts or grounds. Check

the brushes for excessive or abnormal wear.

Replace as needed. Reconnect motor. Test for

operation. If motor does not run, replace.

Conveyor will not run(S/N 4390 to Q190771000 Series) (S/N 4390Q147901200 Series)

Voltage Supply Check incoming voltage supply at line 1 to neutral.

There should be a voltage reading of 120 VAC. If

no present, check breakers. 3 Amp Fuse. This

conveyor fuse is located on the front panel.

Replace if defective. Fuseholder Check and/or Replace. Fan Switch See procedure for checking on Page 20. Conveyor Switch Same procedure as for fan switch.

NOTE:

(Dual Belt Ovens) Dual belt ovens utilize 2 complete independent

conveyor drive systems. The trouble shooting

procedures are the same as single belt ovens,

except that the dual belt ovens use one each of the

following: one "A" D. C. control board and one "B"

D. C. control board. Speed Adjustment Potentiometer

This is a 0 to 5 K ohm, 10 turn potentiometer With

power off, remove the red, black and white pot

leads from the motor control board at terminals P1,

P2 and P3. With a digital multimeter, check the

ohm reading across the red lead (P3) to the black

lead (P1). This reading should be 5 K ohms ± 5%

as the pot is rotated from low to high. Place the

meter leads on the red lead (P3) and on the white

lead (P2) Rotating the pot. slowly, from low to high,

the meter reading should show an even transition

from O to 5 K ohms ± 5%. There should be

DC Motor Control Board Check for 120 VAC input to the control board at

terminals L1 and L2. If not present, check the

conveyor switch and wiring back to 3-amp fuse and

then back to power source if necessary. If 120 VAC

is present at L1 and L2, check the VDC output at

terminals A+ and A-. If a DC voltage is not present,

check the 4 amp and the 1 amp fuses on the

control board. Also reset and check the mini

breaker in the armature line to the gearmotor. If

120 VAC is present at terminals L1 and L2, but DC

voltage is not present at A+ and A-, providing the 1

amp and 4 amp fuses are good, replace the board.

If DC voltage is present at A+ and A-, but motor

does not run, check gear motor as follows.

Impinger I -–1000 Series Service Manual - Domestic

Conveyor speed varying or intermittent

Conveyor will not run(S/N Q19078 & Up1000 Series) (S/N Q14791 & Up1200 Series)

Conveyor Gear Motor If DC voltage is present at A+ and A- and the motor

does not run, first check the mini breaker and then

the conveyor. Refer to the next possible cause.

Check the leads to the motor for evidence of any

shorts or opens, and each lead to ground. If the

motor fails the above tests, replace motor. Remove

dust cover from the top of the motor and rotate

motor shaft to determine if there is a locked rotor or

a locked gear box (use care so encoder disc is not

damaged). Conveyor Check for any mechanical misalignment or

improper adjustment. Also check for worn

bearings. The Installation and Operations Manual

shows proper conveyor belt adjustment. A

conveyor belt that is over tightened will cause

excessive bearing wear and sometimes, irregular

speed. Power Supply Check power supply at the DC control board for the

120 VAC at board terminals L1 and L2. If voltage is

not present, check main circuit breakers. Tach generator and DC Motor Control Board

With the power to the DC motor control board

turned off, remove the leads from terminals T1 and

T2.Place the test leads of a digital meter on the

tach leads, turn power on, and the meter reading

should be approximately 30 to 35 VDC. This

reading should be steady within ± 0.2 to 0.3 VDC.

If this reading is not within + 0.5 VDC, place the

test meter probes on terminals A+ and A-. The

meter reading should be approximately 150 to 160

VDC and steady within approximately 2 VDC. If the

tach. voltage is unsteady, and the board output is

steady, check the coupling for loose set screws or

any type of damage. If the coupling checks good,

the tach. is usually bad. If the board voltage output

is unsteady beyond limits, then the board is

probably bad. Always check the speed pot. Be sure

it is okay before 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 replacement. See procedure for board

adjustment on page 44. DC Gearmotor If the DC control board is steady then the problem

may be the motor or gearbox. Check the brushes

in the motor for excessive arching and/or unusual

wear. Check the motor and gearbox from

instruction located on page 27 under "possible

cause" listing "Conveyor gear motor". Voltage Supply Check incoming voltage supply at Line 1 to neutral.

There should be a voltage reading of 120 VAC. Fan Switch See procedure for checking on page 20. Conveyor Switch Check for 120 VAC to conveyor switch. If no

voltage is present, trace wiring back to the fan

switch. WITH POWER OFF: Check continuity

between switch terminals. Conveyor Fuse (3A) Check, replace if necessary. Fuseholder Check, replace if necessary.

Impinger I -–1000 Series Service Manual - Domestic

Conveyor Control(Stepper) Transformer

Check for 120 VAC supply to primary of

transformer, if voltage is not present, trace wiring

back to the fuse-holder. If voltage is present, check

for output voltage from the transformer secondary.

NOTE: this control transformer outputs (2)

secondary voltages. Red Leads 29 VAC Brown

Leads 10 VAC If BOTH secondary voltages are not

present, replace the transformer. Speed Adjustment Potentiometer

This is a 0 to 50k ohm,10 turn potentiometer. WITH

POWER OFF: remove the 3 pin potentiometer

cable plug from the motor control board. With a

digital multimeter, check the ohm reading across

the red lead to the black lead, this reading should

be 50k ohms ± 5% as the potentiometer is rotated

through its 10 turn rotation. Place the meter leads

on the red lead and white lead. Rotating the

potentiometer slowly, from low to high, the meter

should show an even transition from 0 to 50K ohms

± 5% through the 10 turn rotation of the

potentiometer. There should be no dead or open

spots through the 10 turns of the potentiometer.

Check all three leads to ground. There should be

no continuity to ground. If any of the above checks

fail, replace the potentiometer. Conveyor Motor(Stepper) Control

NOTE: if the conveyor drive motor becomes

jammed or begins to run at an uncontrolled speed,

the conveyor motor will stop running. To reset, turn

off the conveyor switch, wait 10 seconds, turn the

conveyor switch on. If the motor does not run after

attempting re-set, check for 2-29 VAC across the

motor terminals 1 to 2 and 3 to 5 on the conveyor

motor control. If voltage is not present at both sets

of terminals, replace control Conveyor Drive (Stepper) Motor

Check the drive sprocket on motor out-put shaft to

insure that it is tight.. Check motor windings –

measurements should be approximately 2 ohms.

Terminal 1-5, 2-6, 3-7, 4-8 WITH POWER OFF:

Turn the motor shaft to check for jammed gear box.

If motor shaft will not turn, replace conveyor

drive(stepper) motor.

Time/Temp Display 12.6 VAC Power Supply Measure the transformer primary inoperative for a

nominal 120 VAC input. 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 exactly 1/2 of the reading across 1 to 3. If you

do not get the above secondary readings, replace

the transformer. If 120 VAC primary voltage is not

available, refer to the schematic and trace circuit

for incoming power failure. There is a 4 amp fuse in

each red secondary lead. These may be jumpered

(for test only) to determine if they are defective or

intermittent.

NOTE: (Dual Belt Ovens) Dual belt ovens utilize a double pole double throw

switch, which allows either of the optical encoders

to be read from a single Time/Temp. Display.

Check switch and replace as needed.

Impinger I -–1000 Series Service Manual - Domestic

Temp Display out or inaccurate

NOTE: Time/Temp displays use two types of temperature sensor, Thermistor Probe – 2 yellow wires Thermocouple Probe 1 red wire and 1 white wire

Place your pyrometer thermocouple into the center

between fingers T2 and T3 in the oven. Disconnect

the yellow tipped thermistor leads from the

time/temp. terminals 9 and 10. Measure the

resistance of the thermistor probe. See chart in

Section D for proper resistance readings. Thermistor Probe Inspect the thermistor bulb for its proper location in

its spring holder. Check for short in leads where

they enter the sensor bulb. Also check each

thermistor lead for short to ground. Thermocouple Probe Place your pyrometer thermocouple into the center

between fingers T2 and T3 in the oven. Connect

temperature meter to thermocouple at terminals 9

& 10 on back of the time/temp display (Be sure to

maintain proper polarity on thermocouple

connections.) Compare actual oven temperature

with the reading at the time/temp display. If the

temperature readings match, recalibrate or replace

time/temp display. If the readings do not match,

replace thermocouple probe. Erratic time/temp display If strange or unusual behavior is experienced such

as a rolling of numbers, lock up at a given number,

first check for a display circuit lock up. This can be

caused by a voltage spike or surge. To eliminate

this condition remove power from the time/temp.

display by shutting off the main fan switch, or if

display stays on, (older models) circuit breaker

interruption may be required. This should eliminate

the problem. If the problem continues, jumper the

two fuses in the red wires leading from the 12.6

VAC transformer to the display. If this does not

solve the problem, it may be coming in through the

commercial power lines. Suggest that customer

contact his power company for evaluation. Temp Display inaccurate erratic, or inoperative

Perform the power supply check, the thermistor

probe check, and then perform the time/temp

simulator test. Refer to page 51 for instructions.

Remember, when using the time/temp simulator,

remove all the leads from the back of the display

except the 3 power leads. After completion of this

test and if reinstalling back into the oven, the dip

switches must be reset for oven operation. Time display inaccurate erratic, or inoperative

Perform all checks as in the above evaluation. If

the time check is okay, refer to the next section

optical encoder. Optical Encoder The above time/temp test should have already

been performed. Remove dust cover from the

gearmotor and inspect the coupling and encoder

disc. The coupling set screws should be tight and

not slipping on the motor shaft or the tach.

generator shaft. The encoder disc should be firmly

attached to the coupling and not warped. Check

the positioning of the optical encoder disc. The disc

should not be touching the optical encoder

assembly and the encoder assembly should be

mounted so it is squarely facing the coupling shaft.

This is to allow the infrared beams to be broken by

the encoder disc. If all this is okay, then replace the

optical encoder assembly.

Impinger I -–1000 Series Service Manual - Domestic

Time Display inaccurate, erratic, or inoperative(S/N Q19078 & Above1000 Series) (S/N Q14791 & Above1200 Series)

Conveyor Drive (Stepper) Control

Magnet Check to insure that the magnet (cemented to shaft

Hall Effect Sensor Check for any physical damage to Hall Effect

Conveyor Drive (Stepper) Control

Perform all checks as in the above evaluation. If

the time check is okay, refer to the next section.

Check to see if the conveyor drive (stepper) motor

is running. If motor is not running, refer to

"Conveyor will not run" on page 28.

of conveyor drive (stepper) motor) has not been

damaged, or come loose from motor shaft.

Replace as needed.

sensor (mounted on conveyor drive(stepper)

motor). Check all wiring and connections for

damage.

Check all connections for tightness or proper

location and check all wiring for visible damage.

Replace as needed. If there is still no time display,

wire in (temporarily) a new conveyor drive control.

If there is still no time display, reconnect original

conveyor drive control. Replace Hall Effect Sensor.

Impinger I -–1000 Series Service Manual - Domestic

REMOVAL, INSTALLATION & ADJUSTMENTS

MODEL SERIES 1000 &1200

CAUTION !

BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER OVEN BE SURE TO DISCONNECT ELECTRICAL POWER AND GAS SUPPLY

MOTOR, MAIN FAN

1. Shut off power at main breaker.

2. Remove flue by taking out the two (2) mounting screws.

3. Remove louvered motor cover from back of oven.

4. Remove wireway by taking out the ten (10) hex head screws. NOTE: On Series 1200 ovens there are two (2) wireways to be removed and there is extra wire coiled in the control box to allow the wires to hang below the oven back for removal.

5. Remove cooling fan if equipped.

6. Remove junction box cover below motor and disconnect motor leads. Make note of wire numbers and location for reinstallation. Remove the twelve (12) hex head bolts from the oven back and slide back straight out of the oven .

7. Remove two (2) hex head bolts from fan hub and remove fan from motor shaft. NOTE: Measure distance from fan blade to rear wall assembly before removal to aid in reassembly.

8. Remove the eight (8) hex head bolts from the motor mount and slide the motor assembly out of the oven back. Remove heat slinger, if so equipped, by taking out the two (2) hex head cap screws then remove motor by taking off motor clamp and removing the four (4) mounting nuts and washers.

9. Reassemble in reverse order. When reassembling trim the motor mount bolts off after the motor is mounted (if required). Be sure the heat slinger, if so equipped, is set at the proper clearance. (3/8" approximately with 1/16" clearance at motor mount bolts). When motor mount assembly is set on the oven back, align motor shaft in the center of the hole. Set fan assembly on the motor shaft .

NOTE: Torque specs on bolts (150 in/lb. torque)

CAPACITOR, MOTOR

1. Shut off power at main breaker.

2. Remove motor cover from back of oven.

3. Discharge capacitor.

4. Remove and replace.

FAN, MAIN

1. Shut off power at main breaker.

2. Remove back assembly. (See motor, main fan)

S. N. 100-4612 (GAS) S. N. 100-4767 (ELECTRIC)

Impinger I -–1000 Series Service Manual - Domestic

9 3/4 IN.

COOLING FAN

± 1/8 IN.

FAN BLADE

3. Reinstall and locate fan so that the front of fan blades are 9 3/4" from inside of oven back. (See Drawing)

S. N. 4613 & Above (GAS) S. N. 4768 & Above (ELECTRIC)

FAN SPIDER

FAN HUB

CONE

NOTE: MEASUREMENT MUST BE MADE FROM CONE TO FAN SPIDER

1 1/2 INCH

4. Reinstall and locate fan so that the bottom of the fan spider is 1 1/2" from the top of the oven back cone (See Drawing)

RELAY, D.P.S.T.

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove cover from relay box.

4. Disconnect all wires and mark for replacement.

5. Remove relay by removing two (2) mounting screws.

6. Reassemble in reverse order.

COOL DOWN SWITCH

1. Shut off power at main breaker

2. Remove control panel top and front cover.

3. Remove the two (2) wires from the switch, located on the back wall of the control box.

4. Remove two (2) screws from the switch bracket.

5. Reassemble in reverse order, check condition of teflon insulator and be sure a aluminum sensing rod contacts the switch body.

COOLING FAN, CONTROL BOX

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove four (4) screws from the fan frame.

4. Disconnect female cord receptacle and remove fan.

5. Reassemble in reverse order.

Impinger I -–1000 Series Service Manual - Domestic

THERMOSTAT, COOLING FAN

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove lead wires and mark for reassembly.

4. Remove two (2) screws and remove thermostat.

5. Reassemble in reverse order.

BURNER BLOWER MOTOR

1. Shut off power at main breaker.

2. Remove control panel top and front panel. NOTE: Complete burner blower motor assembly, with control box (p/n 369359), is no longer available. The burner blower assembly (p/n 369265) has been changed to a burner motor kit (p/n 369366). When It is used in the 3 ft Impinger Gas oven, the following modification must be made:

3. Remove control box and components mounted on burner blower motor.

4. Mount transformer on air switch bracket as shown (use transformer as template).

5. Remove three (3) screws that attach blower assembly to burner housing.

6. Mount new blower assembly.

7. Wire as shown. See page 35.

8. Discard control box and relay.

9. Transfer air shutter assembly from old blower assembly to new blower assembly. MATERIAL NEEDED: #29 drill bit and #8 x 3/8 self tapping screws (3 each)

AIR SWITCH MOUNTING BRACKET

MOUNTING HOLES (USE #29 DRILL) #8 X 3/8 SELF TAPPING SCREW

SEPARATE GROUND SCREW

Impinger I -–1000 Series Service Manual - Domestic

MOTOR

CENTRIFUGAL SWITCH

WIRING DIAGRAM

BURNER BLOWER ASSEMBLY WITH RELAY REMOVED

RED

24 VAC TO IGNITION CONTROL

RED

GROUND 24 VAC

WHITE

BLACK

(BUTTSPLICE CONNECTORS PROVIDED FOR 120 VAC POWER SUPPLY)

120 VAC

TO GROUND TERMINAL ON IGNITION CONTROL

GREEN

TRANSFORMER P/N 369531 (WHEN USING OLD TRANSFORMER, 120 VAC LEADS ARE BLACK. WIRE TERMINALS ARE PROVIDED.)

BLOWER WHEEL, BURNER

This is part of the burner blower motor assembly.

TO REMOVE THE BLOWER WHEEL FOR PERIODIC CLEANING:

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove air shutter held by 3 screws.

4. Loosen set screw on blower wheel hub and pull straight out.

5. Reassemble in reverse order. NOTE: There is no critical placement of the blower wheel on the motor shaft. Just back as far as it will go and then spin the blower to be sure it is not rubbing.

AIR PRESSURE SWITCH

1. Shut off power at main breaker.

2. Remove front control compartment cover.

3. Remove air switch cover plate.

4. Disconnect wiring and mark for reassembly.

5. Loosen 2 screws and remove air switch.

6. Disconnect 1/4" air tube.

7. Reassemble in reverse order.

8. Turn on power and calibrate air switch as follows: Turn adjusting screw counter clockwise to full out position. Turn main fan and heat switch on. Turn adjusting screw clockwise until heat shuts off. Turn adjusting screw counterclockwise 1/4 turn and unit should heat. NOTE: Test as follows: Oven must be tested in heated condition. Remove main fan fuse. Main fan should shut down, deactivating air switch causing heat to shut off in approximately 5 to 25 seconds.

Impinger I -–1000 Series Service Manual - Domestic

BURNER ASSEMBLY

SCREW LOCATED UNDER

ADJUSTMENT CONNECTION

MANIFOLD ADJUSTMENT

SCREW LOCATED UNDER

1. Shut off power at main breaker.

2. Shut off gas supply.

3. Remove control panel top and front panel.

4. Remove gas control valve (See "GAS CONTROL VALVE")

5. Disconnect pilot tube.

6. Remove thermostat or solenoid valve.

7. Remove four (4) phillips screws that secure the burner backing plate.

8. Remove burner assembly from housing, the main and pilot orifice, flame target, pilot shield (main and extension), flame sensor, and burner ignitor can now be changed or serviced as needed.

9. Reassemble in reverse order.

GAS CONTROL VALVE

1. Shut off power at main breaker.

2. Shut off gas supply.

3. Remove control panel top and front cover.

4. Disconnect the gas piping from the back of the unit.

5. Remove the four-(4) screws from the incoming nipple mounting bracket.

6. Remove incoming nipple.

7. Remove pilot tube assembly from control valve.

8. Disconnect pipe union just above control valve.

9. Disconnect wiring from control valve making note of wire numbers and location.

10. Reassemble in reverse order - after assembly is complete be sure to check manifold pressure (3.5" W.C. NAT Gas/10" W.C. LP) and adjust if necessary. (See Section "MANIFOLD PRESSURE-ADJUSTMENT") NOTE: Check all gas line fittings for leaks after installation.

MANIFOLD ADJUSTMENT

COVER SCREW

FRONT VIEW

MANIFOLD PRESSURE

PILOT LINE CONNECTION

COVER SCREW

TOP VIEW

Impinger I -–1000 Series Service Manual - Domestic

MANIFOLD PRESSURE - ADJUSTMENT

1. Remove control panel top and front cover.

2. WITH ELECTRIC POWER AND GAS OFF: remove the outlet pressure tap plug from the gas control valve and install the adapter fitting and manometer.

3. Turn on electric power and gas and start-up oven.

4. With oven at full fire, manifold pressure should be (3.5"W.C. NAT/10" W.C. LP).

5. Turn off electric power and gas, replace cover screw, remove manometer and adapter; replace pressure tap plug.

6. Check pressure tap for gas leaks before closing panel.

7. Close control panel and check system operation.

TEMPERATURE CONTROL VALVE (ROBERT SHAW)

1. Shut off power at main breaker

2. Shut off gas supply.

3. Remove control panel top and front cover.

4. Remove gas control valve (See Above).

5. Remove the two-(2) 3/8" x 16 nuts that hold main orifice bracket to the burner assembly.

6. Remove temperature control valve sensing bulb from oven cavity. NOTE: It may be necessary to remove conveyor and fingers from oven cavity.

7. Remove piping from old temperature control valve.

8. Reassemble in reverse order, be sure the sensing bulb is properly placed in the oven cavity. The sensing bulb is properly placed in the oven cavity when it is placed in the spring holder and positioned with the 5 1/2" of the bulb to the left of the spring holder. NOTE: The bypass screw should be adjusted all the way in.

SOLENOID VALVE

1. Shut off power at main breaker.

2. Shut off gas supply.

3. Remove control panel top and front cover.

4. Remove gas control valve (See "GAS CONTROL VALVE").

5. Disconnect wires from solenoid valve.

6. Remove two (2) 3/8" x 16 hex nuts that hold main orifice bracket in place.

7. Remove solenoid valve assembly.

8. Remove piping from solenoid valve.

9. Reassemble in reverse order.

TEMPERATURE CONTROL BOARD

GAS OVENS

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove relay box cover.

4. Disconnect wiring from temperature control board.

5. Make note of wire number and location for reinstallation.

6. Reassemble in reverse order.

ELECTRIC OVENS

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Disconnect wiring from temperature control board.

4. Make note of wire numbers and location for reinstallation.

5. Reassemble in reverse order.

Impinger I -–1000 Series Service Manual - Domestic

TEMPERATURE CONTROL POTENTIOMETER – REPLACEMENT

1. Remove control panel top and front cover.

2. Remove one screw from control knob guard and move guard to one side.

3. Remove knob and locknut on control pot. shaft and push out.

4. Remove three (3) wires from temperature control board. Note wire numbers and location.

5. Reassemble in reverse order.

MERCURY CONTACTOR

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Disconnect contactor wires and mark for reinstallation.

4. Remove screws from mounting bracket and replace contactor. NOTE: Be sure contactor is not mounted upside down as this will cause a constant on condition.

5. Reassemble in reverse order.

THERMOCOUPLE- REPLACEMENT

1. Remove control panel top and front cover.

2. Remove cover from relay box.

3. Slide thermocouple out of oven chamber. NOTE: Remove conveyor and bottom fingers to aid in removal and installation of thermocouple.

4. Remove two (2) wires from temperature control board. Make note of wire numbers or color and location for reinstallation.

5. Reassemble in reverse order making sure the metal end on the thermocouple is securely in the wire form in the oven chamber.

THERMOCOUPLE MEASUREMENT CHART:

EXPLANATION: The junction temperature is the ambient air temperature where the thermocouple fastens

to the electronic temperature control board.

200°F 250°F 300°F 325°F 350°F 400°F 425°F 450°F 500°F 550°F 600°F

90°F 3.26 4.77 6.30 7.06 7.83 9.37 10.14 10.91 12.46 14.00 15.53

88°F 3.32 4.83 6.36 7.12 7.89 9.43 10.20 10.97 12.51 14.05 15.59

86°F 3.37 4.88 6.41 7.17 7.94 9.49 10.26 11.03 12.57 14.11 15.65

84°F 3.43 4.94 6.47 7.23 8.00 9.54 10.31 11.09 12.63 14.19 15.71

82°F 3.49 5.00 6.53 7.29 8.06 9.60 10.37 11.14 12.69 14.23 15.76

80°F 3.55 5.06 6.59 7.35 8.12 9.66 10.43 11.20 12.74 14.28 15.82

78°F 3.60 5.11 6.64 7.40 8.17 9.72 10.49 11.26 12.80 14.34 15.86

76°F 3.66 5.17 6.70 7.46 8.23 9.77 10.55 11.32 12.86 14.40 15.94

75°F 3.69 5.20 6.73 7.49 8.26 9.80 10.57 11.35 12.89 14.43 15.97 74°F 3.72 5.23 6.76 7.52 8.29 9.83 10.60 11.37 12.92 14.46 15.99 72°F 3.78 5.29 6.82 7.58 8.35 9.89 10.66 11.43 12.97 14.51 16.05 70°F 3.83 5.34 6.87 7.63 8.40 9.95 10.72 11.49 13.03 14.57 16.11

68°F 3.89 5.40 6.93 7.69 8.46 10.00 10.78 11.55 13.09 14.63 16.17

66°F 3.95 5.46 6.99 7.75 8.52 10.06 10.83 11.61 13.15 14.69 16.23

64°F 4.01 5.52 7.05 7.81 8.58 10.12 10.89 11.66 13.20 14.74 16.28

62°F 4.06 5.57 7.10 7.86 8.63 10.18 10.95 11.72 13.26 14.80 16.34 60°F 4.12 5.63 7.16 7.92 8.69 10.24 11.01 11.78 13.32 14.86 16.40

O V E N T E M P

Impinger I -–1000 Series Service Manual - Domestic

HEATING ELEMENT

1. Shut off power at main breaker.

2. Remove rear motor cover.

3. Disconnect heater element wire and mark for reassembly.

4. Remove oven back assembly. NOTE: For ovens SN 4768 and above, remove fan shroud.

5. Remove two (2) mounting screws and remove heating element.

6. Reassemble in reverse order. NOTE: Be sure the lead terminals are double nutted to the heating element and are tight If the leads are not attached in this manner, a loose connection may result, causing arcing and lead wire burn off.

IGNITION CONTROL

NOTE: When replacing Johnson Controls, G-60 or G-65 Ignition Control with the new Honeywell Ignition

control, the 24 VAC burner transformer (rated at 20VA) must be replaced with the larger (rated at 40VA) #369531 Transformer.

1. Read all instructions supplied in kit before starting. Tools required: Center punch and 7/32" drill bit.

2. Shut off power at main breaker.

3. Remove control panel top and front panel.

4. Remove front panel.

5. Remove ignition control package from Johnson gas valve and discard. The white flame sensor wire, from the burner to terminal #4 on Johnson gas control is no longer used. Cut Wire at burner and discard. NOTE: On some Impinger ovens, it may be necessary to drill the mounting holes through the oven specification plate. Use care to avoid drilling through any important information or agency approval markings on the specification plate.

6. Use template supplied to locate and drill two (2) 7/32" mounting holes for new Ignition Control. When mounting new ignition control, make certain that the green #67 ground wire (supplied) is installed properly.

7. Connect wiring as follows: Connect blue wire from gas valve to terminal marked P.V. on ignition control. Connect black wire from gas valve to termainal marked M.V./P.V. on ignition control. Connect red wire from gas valve to terminal marked M.V. on ignition control. Connect white wire from indicator light to ground, by using splice connection on green wire supplied.

Connect orange spark lead from burner to terminal marked "spark" on ignition control. NOTE: It may be necessary to replace ignition cable terminal with .250" quick-

connect terminal (supplied).

Connect the red wire from burner blower motor centrifugal switch to terminal marked

24V on ignition control.

Connect green #68 wire (supplied) from terminal 24 GND to terminal GND (burner)

to ground.

Connect the green wire from 24VAC transformer to wire #68 at terminal marked

24V(GND) on ignition control.

The Honeywell ignition control module provides 100% safety lockout. Control will try for

ignition for 15 seconds. If ignition does not occur, control will lockout or shut off. To reset control, the burner switch must be turned off for 1 minute.

Impinger I -–1000 Series Service Manual - Domestic

24V (GND)

NEW GREEN WIRE

GREEN WIRE SUPPLIED

24V

1 24V

2 24V

WHITE FROM PILOT LIGHT

BLUE FROM VALVE

BLACK FROM VALVE

#3 RED FROM VALVE

2 MV/PV

1 MV

GND

24V GND

4 GND

24V

MV/PV

BUTT SPLICE AND

SUPPLIED IN KIT

TO PILOT LIGHT

SPARK 9

WHITE FROM PILOT LIGHT

BUTT SPLICE AND NEW

TO PILOT LIGHT

#3 RED FROM VALVE

24V FROM TRANSFORMER INSULATED MALE TAB CONNECTOR

BLUE FROM VALVE

BLACK FROM VALVE

FROM BLOWER

CENTRIFUGAL SWITCH

CABLE

IGNITOR/SENSOR

IN KIT

RING TERMINAL END OF WIRE HARNESS SUPPLIED IN KIT

Impinger I -–1000 Series Service Manual - Domestic

FLAME SENSOR

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove burner assembly (see burner assembly).

4. Disconnect one (1) wire from flame sensor.

5. Remove flame sensor by removing one (1) mounting nut.

6. Reassemble in reverse order.

NOTE: Be sure flame sensor is not bent or touching any other burner parts.

BURNER IGNITOR

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove burner assembly.

4. Remove flame sensor.

5. Remove pilot shield and pilot shield extension.

6. Remove burner igniter.

7. Reassemble in reverse order. NOTE: Be sure to reconnect burner igniter cable to ignition control.

TRANSFORMER 120/24 VAC

1. Remove control panel top and front cover.

2. Remove control box cover from burner blower motor. NOTE: The complete burner blower motor assembly, with control box (PN 369359), is no longer available. The blower motor assembly (PN 369265) has been changed to a burner motor kit (PN 369366). If the burner blower motor or 24V transformer (PN 369531 ) are replaced, the following modifications must be made:

3. Shut off power at main breaker.

4. Remove control box and components from burner blower motor.

5. Mount transformer on air switch bracket (use transformer as template).

6. Discard control box and relay. Material needed: #29 drill bit and #8 x 3/8" self tapping screws (3 each)

7. See Burner blower motor section for wiring information.

8. Replace covers and check system operation.

BURNER LIGHT (24 VAC) - GAS OVENS

1. Shut off power at main breaker.

2. Remove control panel top and front panel.

3. Remove access cover.

4. Remove two wires from burner light, note number and location.

5. Grasp body of light assembly and slide sideways to remove.

6. Reassemble in reverse order and check.

HEAT LIGHT (125 VAC) - ELECTRIC OVENS

1. Shut off power at main breaker.

2. Remove control panel top and front panel.

3. Remove two (2) wires from heat light, note number and location.

4. Grasp body of light assembly and slide sideways to remove.

5. Reassemble in reverse order and check.

THERMOSTAT, Hl-LIMIT - ELECTRIC OVENS

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove the two-(2) wires from the thermostat located on the back wall of the control box.

4. Remove two (2)-mounting screws.

5. Reassemble in reverse order. NOTE: Be sure to press red "reset" button on new thermostat to ensure that it is in the "closed" position.

Impinger I -–1000 Series Service Manual - Domestic

PILOT ORIFICE - BURNER

1. Shut off power at main breaker.

2. Shut off gas supply.

3. Remove burner assembly (see Burner Assembly).

4. Remove pilot line from pilot orifice.

5. Remove pilot orifice from burner igniter.

6. Reassemble in reverse order.

MAIN ORIFICE - BURNER

1. Shut off power at main breaker.

2. Shut off gas supply.

3. Unbolt temperature control valve assembly (see Temperature Control Valve) and carefully rotate to access main orifice bracket. NOTE: Be sure not to damage capillary tube.

4. Remove main orifice from orifice bracket.

5. Reassemble in reverse order.

6. Check all gas fittings for leaks.

POTENTIOMETER - CONVEYOR SPEED CONTROL

1. Shut off power at main breaker.

2. Remove control panel top and front panel.

3. Remove conveyor speed control dial.

4. Remove mounting nut from pot. shaft.

5. Remove pot. from front panel.

6. Disconnect pot. wiring from conveyor control board.

7. Remove pot. assembly.

8. Reassemble in reverse order.

DIAL, CONVEYOR SPEED CONTROL (NON-DIGITAL DISPLAY OVENS)

1. Shut off power at main breakers.

2. Remove dial by loosening set screws.

3. Set new dial indicator to "000" in window and lock.

4. Turn speed control pot. shaft to its minimum speed position.

5. Slide dial assembly onto pot. shaft and tighten set screw.

DIAL, CONVEYOR SPEED CONTROL (OVEN WITH DIGITAL DISPLAY)

1. Shut off power at main breaker.

2. Remove old dial by loosening set screw.

3. Remove shaft locking nut.

4. Install new shaft locking nut. NOTE: This is a friction type locking nut do not try to trim this nut to fit.

5. Install new dial by sliding over pot. shaft and tightening set screw.

CONVEYOR MOTOR REPLACEMENT - BODINE (SN 100-4389)

1. Shut off power at main breaker.

2. Remove control panel top and front panel.

3. Remove the conveyor drive chain from the motor sprocket.

4. Remove chain guard.

5. Remove the sprocket from the conveyor motor shaft by loosening the set screws and sliding the sprocket off the shaft.

6. Unplug the conveyor motor wiring harness.

7. Remove the four (4) mounting bolts and nuts.

8. Reassemble in reverse order and calibrate the conveyor D. C. control board (See D. C. Motor Control Board - Calibration, Bodine System).

Impinger I -–1000 Series Service Manual - Domestic

CONVEYOR MOTOR REPLACEMENT - BALDOR 1000 SERIES SN 4390 - 14974 1200 SERIES SN 4390 – 14791

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove the conveyor drive chain from the motor sprocket.

4. Remove chain guard.

5. Remove the sprocket from the conveyor motor shaft by loosening the set screws and sliding the sprocket off the shaft.

6. Unplug the wiring harness for the motor.

7. Disconnect the red and black wires from the terminals on the tach. generator which is mounted on the top of the D.C. conveyor motor. Note which terminal the red and black wires are attached to. (Reversing the polarity will cause motor to run wide open with no control from the speed pot.)

8. Remove the four (4) mounting bolts.

9. Remove dust cover, remove tach., tach. bracket, coupling, and optical encoder assembly for reinstallation on new motor assembly. (See page 82)

10. Reassemble in reverse order and calibrate in the conveyor D. C. control board (See D. C. Motor Control Board - Calibration).

CONVEYOR MOTOR REPLACEMENT - STEPPER 1000 SERIES SN14975 AND ABOVE 1200 SERIES SN14792 AND ABOVE

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove the chain guard.

4. Remove the conveyor drive chain from the motor sprocket.

5. Remove the sprocket from the conveyor motor shaft by loosening the set screw and sliding the sprocket off the shaft.

6. Unplug the wire harness for the motor.

7. Unplug the wire harness for the hall effect sensor (mounted on motor) from the conveyor speed control.

8. Remove the four (4) mounting bolts and washers.

9. Reassemble in reverse order and calibrate the control board. (See Stepper Control-Adjustment) NOTE: New drive motors will come as an assembly with Magnet and Hall Effect Sensor. The magnet and sensor will also be available as a replaceable spare part. (When replacing the magnet be sure to clean shaft and locate new magnet up against the shoulder on the shaft.)

COUPLING AND ENCODER DISC

1. Shut off power at main breaker.

2. Remove conveyor motor assembly.

3. Remove dust cover above motor.

4. Loosen both allen set screws (.050 inch allen wrench) located on coupling hub.

5. Remove 3 screws from tach. bracket, loosen the 4th.

6. Remove encoder assembly, see optical encoder assembly in following procedure. Pushing coupling down on motor shaft. Swivel tach. bracket aside and remove coupling. To install, push coupling on to motor shaft. The encoder disc must be nearest motor.

7. Refasten tach. bracket in proper alignment.

8. Tighten the set screw on the tach. side first maintaining the .010 minimum dimension between the coupling hub and tach.

9. Pull the coupling apart (approximately 1/8",3.2mm) and fasten the motor side set screw. If the optical encoder was loosened, refer to optical encoder in this section for adjustment. NOTE: The thin, slotted encoder disc must be handled with care so not to bend it.

10. Recheck tightness on the set screws to be sure they are tight. If available, LOC TITE (the removable kind) should be used to secure set screws.

Impinger I -–1000 Series Service Manual - Domestic

OPTICAL ENCODER ASSEMBLY

1. Shut off power at main breaker.

2. Remove conveyor motor assembly .If replacing with new assembly, cut wires to remove as new wires and plug are provided. If only removing for access to coupling follow step 4.

3. Remove pins from connectors with pin extractor tool, P/N 369600.

4. Loosen dust cover screws and pull dust cover away from motor.

5. Remove 2 screws from optical encoder and remove encoder.

6. Reassemble in reverse order. To adjust optical encoder: Position the encoder assembly so it does not rub the coupler hub and is square with the encoder disc. The infrared light beam will be broken by slots in the encoder disc. The encoder disc should not touch the bottom or top of the optical encoder. If it does readjust the coupling. The digital speed readout may be observed to check proper adjustment of the optical encoder assembly.

TACH. GENERATOR

1. Shut off power at main breaker.

2. Remove conveyor motor assembly .

3. Remove tach. cover plate and tach. Ieads. Mark lead position.

4. Remove 2 slotted screws from dust cover base and remove dust cover.

5. Loosen coupling set screw (.050 inch allen wrench).

6. Remove tach. bracket from motor.

7. Remove 4 screws from base of tach. and tach. is now free for removal.

8. Reassemble in reverse order. Maintain spacing of .010 minimum between tach. Bracket and coupler hub. NOTE: If a new tach. generator is installed, the D.C. motor control board MUST BE RECALIBRATED There is no repair procedure for the tach. If defective, replace.

CONVEYOR MOTOR CONTROL BOARD

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove cover from relay box. SN 100-4389 BODINE SYSTEM Remove wires from terminal strip on control board making sure to mark wires so they will be reinserted on the proper terminal. Remove the four (4) hex head screws. Reassemble in reverse order and calibrate (See D. C. Motor Control Board - Calibration, Bodine System)

SN 4390-14974 1000 SERIES GAS OVENS SN 4390-14791 1200 SERIES GAS OVENS

4. Make note of wire number and location before removing them from the control board. POLARITY BETWEEN, T1-T2 AND A+ AND A- IS CRITICAL. The bottom mounting screw need only be loosened as the mounting bracket for the control board is slotted. Remove top two (2)mounting screws and remove control board. NOTE: Exchange boards on the mounting bracket before reinstallation.

5. Reassemble in reverse order and calibrate (See D. C. Motor Control Board - Calibration)

SN 14975 AND ABOVE 1000 SERIES GAS OVENS SN 14792 AND ABOVE 1200 SERIES GAS OVENS

Make note of wire numbers and location before removing them from the control board.

6. The bottom mounting screw need only be loosened as the mounting bracket for the control board is slotted. Remove top two (2) mounting screws and remove control board.

7. Reassemble in reverse order and calibrate. (See Stepper Control-Adjustment)

D. C. MOTOR CONTROL BOARD - CALIBRATION SN 100 to 4389 - BODINE SYSTEM

1. Remove control panel top and front cover.

2. Remove cover from relay box.

3. Identify D. C. control board and calibrate as per the following instructions: NOTE: THE USE OF A DIGITAL VOLTMETER IS NECESSARY FOR PROPER ADJUSTMENT Check incoming AC voltage at L1 and L2. Should be 120 VAC ± 10%. Check field voltage at terminals F1 and F2. Should be 100 VDC ± 10 volts. Turn speed control dial clockwise to its maximum speed position.

Impinger I -–1000 Series Service Manual - Domestic

PLACE DIGITAL VOLTMETER LEADS ON terminal S1 and S2, adjust the max pot. for a

TERMINAL

reading of 3.4 VDC. Place METER LEADS on terminals A1 and A2. Adjust the reg. pot. for a reading of 125 VDC. NOTE: In some instances when the input AC voltage runs on the high side of the normal input range, you may have difficulty adjusting the max. pot. for a reading of 3.4 VDC. In this instance, a reading of 3.45 VDC is acceptable. Adjust speed pot to obtain the proper time setting for the conveyor to meet customers desired speed . Check conveyor travel in a no load situation to insure conveyor belt is traveling at a constant speed.

GND S 3

3 A. FUSE

S 2 S 1 A 2 A 1 F 2 F 1 L 2 L 1

D. C. CONTROL BOARD "BODINE" S/N 100-4389

REG MIN MAX

3 A. FUSE

D. C. CONTROL BOARD "BODINE" S/N 100 4389 ( TOP VIEW )

STRIP

Impinger I -–1000 Series Service Manual - Domestic

D. C. MOTOR CONTROL BOARD SN 4390 - 14974 1000 SERIES GAS OVENS SN 4390 - 14790 1200 SERIES

Three different styles of control boards have been used and all three are still usable. All three were supplied under the same part number. STYLE 1 CONTROL BOARD ADJUSTMENT

NOTE: A digital meter must be used for this adjustment. Voltage at L1 and L2 terminals of the control board is to be 120 VAC ± 10% Connect a digital volt meter to terminals A+ and A-, set meter on 200 VDC scale. Turn speed control pot. (on oven control panel) to its maximum speed setting. Turn "MAX", "MIN", and "IR" pots counter clockwise until they stop (DO NOT turn CL pot.) Adjust "TACH" pot. so the volt meter indicates 110 VDC ± 0.5 volts. Adjust "IR" pot. to read between 1.5 and 2 VDC above tach. reading. (Example: If tach. reading would be 110.3 then adjust IR to between 111.8 VDC and

112.3 VDC)

Turn speed control pot. to its minimum speed setting. Adjust "MIN" pot. so the voltmeter indicates between 2 and 6 VDC.

Turn speed control dial to obtain a reading of 22 VDC on your meter. Observe for approximately 30 seconds to see if stable within ± 0.5 VDC. Repeat at 35 VDC. Check speed of conveyor and adjust time/temp. display if necessary. Seal pots with Glyptol or nail polish.

L 1 A+

L 1 A +

4 A. FUSE 1 A. FUSE

P 2

P 3

L 2

A -

P 1

BOARD P/N 369155

STYLE 1

RESISTOR

T 1 T 2MAX MIN IR CL TACH

4 A. FUSE 1 A. FUSE

L 2

A -

P 2

P 3

P 1

MAX MIN IR CL TACH T 1 T 2

" B " BOARD P/N 369272

CHOKE

STYLE 2 AND STYLE 3 CONTROL BOARD ADJUSTMENT

NOTE: A digital meter must be used. Voltage at L1 and L2 terminals of the control board is to be 120 VAC± 10%. Connect a digital voltmetet to terminal T1 and T2, set the meter on DC scale. Turn speed control pot. (on oven control panel) to its maximum speed setting. Adjust the "MAX" pot. so the voltmeter indicates 22.6 to 22.8 VDC. Turn the speed control pot. to its minimum speed setting. Adjust the "MIN" pot. so the voltmeter indicates 1.4 to 1.5 VDC. Reset the speed control pot. to its maximum speed setting and check if voltage is still at 22.6 to 22.8 VDC. Readjust if necessary.

Reset the speed control pot. to its maximum speed setting and check if voltage is still at 1.4 to

1.5 VDC. Readjust if necessary.

If readjustment of either the "MAX" or "MIN" pot. was necessary, the opposite must always be 46

Impinger I -–1000 Series Service Manual - Domestic

checked until both "MIN" and "MAX" are in proper adjustment. Measure the speed of the conveyor and adjust the time/temp. display if necessary. Seal pots with Glyptol or nail polish.

NOTE: Occasionally a new board (Style 2 and 3 only) is so far out of adjustment that you will be unable to adjust the correct voltage. To correct, turn both the "MAX" and "MIN" pots 10 turns in either direction and then 5 turns in opposite direction. This will center the pots and allow them to be calibrated. If after this procedure, the board will not adjust, it is probably defective.

L 1 A+

L 1 A +

4 A. FUSE

P 2

P 3

MAX MIN

1 A FUSE4 A FUSE RESISTOR

L 2

A -

P 1

BOARD P/N 369155

STYLE 2

T 1 T 2

L 1 L 2 A +A -

4 A FUSE

P 2

P 3

MAX MIN

1 A. FUSE

L 2

A -

P 1

" B " BOARD P/N 369272

CHOKE

T 1 T 2

RESISTOR

CAPACITOR

MIN MAX

S 1

T 2T 1S 3

S 2

BOARD P/N 369155

Impinger I -–1000 Series Service Manual - Domestic

STYLE 3

STEPPER CONTROL - ADJUSTMENT S/N 14975 AND ABOVE 1000 SERIES GAS OVEN S/N 14792 AND ABOVE 1200 SERIES GAS OVEN

12345

CURRENT SENSE DO NOT ADJUST

Heat Sink

MOTOR

J 6

J 5J 4J 3 J 1

Max. Conveyor Speed Adj.

POTENTIOMETER

Min. Conveyor Speed Adj.

Blue

LOCKED ROTOR

TIME/TEMP

Red

Gray

To T/T display

Brown Red

POWER

Black to #4 White to #7

1. With power off, the five (5) dip switches located on the conveyor control (see drawing above) should be set as below.

DIP SWITCHES

CONTROL 1 2 3 4 5 SWITCH POSITION OFF OFF ON OFF OFF

2. With power off, the ten (10) dip switches located on rear of Time/Temp Display (see drawing on page 52) should be set as below.

DISPLAY 1 2 3 4 5 6 7 8 9 10 SWITCH POSITION OFF * * ON OFF OFF ON ON OFF ON *SWITCH 2 - OFF FOR 60HZ, ON FOR 50HZ *SWITCH 3 - OFF FOR °F, ON FOR °C

3. With conveyor running, set conveyor speed control so Time/Temp. Display indicates 5:00 minutes. Place a pan on the conveyor, measure (STOPWATCH) the time (SPEED OF PAN) of the leading edge in to leading edge out of oven. Turn the speed adjustment pot. on the rear of the Time/Temp. Display so display agrees with time measured by the stop watch. (See drawing on page 52).

4. Turn conveyor speed control fully counterclockwise and adjust the stepper control maximum speed pot (refer to drawing above) so the display indicates 50 seconds.

5. Turn conveyor speed control fully clockwise and adjust the stepper control minimum speed pot so the display indicates 30 minutes. NOTE: Repeat 4 and 5 to be sure settings are accurate.

6. Turn power off and set #1 dip switch to its (ON/OFF) other position and verify that the conveyor reverses direction when power is applied. Set conveyor travel direction as customer requests. CAUTION: ALWAYS REMOVE POWER BEFORE CHANGING CONVEYOR DIRECTION.

Impinger I -–1000 Series Service Manual - Domestic

REVERSING CONVEYOR DIRECTION SN 100-4389 (BODINE)

1. Shut off power at main breaker.

2. Remove control panel top.

3. Turn reversing switch (located on relay box) to obtain desired belt direction.

4. Reassemble in reverse order.

SN 4390-14974 1000 SERIES GAS OVEN

SN 4390-14791 1200 SERIES

All ovens leaving our plant are wired to operate conveyors from left to right. To reverse conveyor direction, use the following procedure.

1. Shut off power at main breaker.

2. Remove control panel top.

3. Remove cover from relay box.

4. Reverse wires fastened to terminals A+ and A-.

5. Reverse wires fastened to terminals T1 and T2. Both set of leads must be reversed or oven will run at maximum speed with no speed adjustment possible.

STEPPER DRIVE SYSTEM

SN 14975 AND ABOVE 1000 SERIES GAS OVEN

SN 14792 AND ABOVE 1200 SERIES

1. Shut off power at main breaker.

2. Remove control panel top.

3. Remove relay box cover.

4. Change position of dip switch #1 on stepper control board.

5. Reassemble in reverse order.

MINI CIRCUIT BREAKER

1. Shut off power at main breaker.

2. Remove control panel top and front panel.

3. Disconnect two (2) wires from circuit breaker.

4. Remove knurled mounting nut and remove.

5. Reassemble in reverse order.

NOTE: Be sure to reset breaker before operating.

BEARING, CONVEYOR SN 100-2163

1. Remove conveyor from oven and place of flat surface.

2. Remove connecting links from conveyor belting. See Installation and Operting Instructions Manual.

3. Remove conveyor belting from conveyor.

DRIVE END

4. Remove drive sprocket from drive shaft.

5. Remove drive shaft from end of conveyor frame.

6. Remove bearing retaining clips from ends of drive shaft.

7. Slide bearing off drive shaft.

8. Reassemble in reverse order.

IDLER END

4. Remove idler shaft from end of conveyor frame.

5. Slide bearing off idler shaft.

6. Reassemble in reverse order.

Impinger I -–1000 Series Service Manual - Domestic

BEARING, CONVEYOR SN 2164 AND ABOVE

1. Remove conveyor from oven and place on a flat work surface.

2. Remove connecting links from conveyor belting. See Installation and Operating Instructions Manual .

3. Remove conveyor belting from conveyor

DRIVE END

4. Remove drive sprocket from drive shaft.

5. Remove two (2) allen head bolts.

6. Remove drive shaft and bearing assembly from conveyor frame.

7. Reassemble in reverse order.

IDLER END

4. Remove idler shaft/bearing/mounting plate assembly from conveyor frame.

5. Remove bearing/mounting plate assembly from conveyor.

6. Remove bearing from mounting plate.

7. Reassemble in reverse order.

TRANSFORMER-STEPPER MOTOR CONTROL

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Disconnect transformer wire harness.

4. Remove two (2) mounting screws.

5. Reassemble in reverse order.

HALL EFFECT SENSOR – REPLACEMENT

NOTE: There are two (2) styles of hall effect sensors - (See Drawing).

OLD STYLE

Remove two (2) screws from conveyor drive motor and break away hall effect sensor from motor shaft. To install new sensor, cut sensor bracket through center hole and install sensor

half with one (1) screw. Reinstall plug on conveyor control.

NEW STYLE

Remove two (2) mounting screws and remove sensor from conveyor motor. Reinstall in reverse order.

CUT HERE

DISCARD

NEW STYLE

OLD STYLE

Impinger I -–1000 Series Service Manual - Domestic

TEMPERATURE GAUGE - REPLACEMENT

1. Shut off power at main breaker.

2. Remove control panel top.

3. Disconnect thermocouple from temperature gauge.

4. Remove two (2) mounting bolts and remove temperature gauge.

5. Reassemble in reverse order.

THERMISTOR - REPLACEMENT

1. Shut off power at main breaker.

2. Remove control panel top.

3. Slide thermistor probe out of oven chamber. NOTE: Remove conveyor and bottom fingers to aid in removal and instaliaticn of thermistor probe.

4. Disconnect wires from back of digital display at terminal strip (location #9-10).

5. Reassemble in reverse order making sure the probe is placed securely in the wire form in the oven chamber.

6. Reconnect to digital display and calibrate. (See Time/Temperature Display - Replacement and Calibration)

To test the thermistor probe, refer to the following chart and instructions

OVEN TEMPERATURE

300º F 325º F 350º F 400º F 425º F 450º F 500º F 550º F

OHMS 182 138 102 62 48 38 24 16

Place test pyrometer thermocouple and preheat oven as specified under temperature calibration.

Disconnect the thermistor probe from terminals 9 and 10 and measure the resistance across the 2 yellow leads. Refer to the above chart to determine if probe is producing the proper resistance.

EXAMPLE: The probe resistance at 500°F(260°'C) should be 24 ohms.

TRANSFORMER, TIME/TEMP. DISPLAY

1. Shut off power at main breaker.

2. Remove control panel top.

3. Remove relay box cover.

4. Disconnect two (2) wires at base of transformer and three (3) wires at terminals 1,2, and 3 on Time/Temp Display.

5. Remove two (2) mounting screws.

6. Reassemble in reverse order.

TIME/TEMPERATURE DISPLAY - REPLACEMENT & CALIBRATION

1. Shut off power at main breaker.

2. Remove control panel top.

3. Disconnect wires from rear of display. Make note of wire numbers and location for reinstallation.

4. Remove four (4) screws from display bezel (2 top/2 bottom) and remove display.

5. Install new display in reverse order. Note dip switch position and calibrate display as follows: a) Check all wire connections to insure proper tightness. b) Check dip switch setting to insure proper positions for the model of oven:

Impinger I -–1000 Series Service Manual - Domestic

ALL 1000 & 1200 SERIES OVENS

SWITCH SETTINGS

1 2 3 4 5 6 7 8 9 10

TYPE I OFF OFF* ON ON ON OFF**

TYPE II OFF OFF* OFF** ON ON ON TYPE III OFF OFF* OFF** ON OFF ON ON ON OFF ON (Baldor Motor) TYPE III OFF OFF* OFF** ON OFF OFF ON ON OFF ON (Stepper Motor) TYPE IV OFF OFF ** ON OFF ON ON ON OFF ON (Baldor Motor) TYPE IV OFF OFF ** ON OFF OFF ON ON OFF ON (Stepper Motor)

*These switches are for Hertz settings (OFF=60HZ) & (ON=50HZ)

**These switches are for temperature read-out (OFF=Degrees F) & (ON=Degrees C)

c) Turn power on. d) Calibrate time:

Place an object on the conveyor belt and time with a stopwatch, the elapsed time for the object to travel through the oven. (Leading edge in to leading edge out.) Push in and hold the set button. Adjust the time calibration pot on the rear of the module until the display numbers match the measured time. Seal adjustment pot. with Glyptol or nail polish.

e) Calibrate temperature:

Place a temperature sensor in between top two fingers and set temperature control to 500°F; allow temperature to stabilize. "Fine Tune" temperature setting to achieve measured temperature swings from 497°F to 503°F. So if actual temperature falls between 497°F and 503°F the display must show 500°F. Adjust temperature calibration pot to achieve a display reading of 500°F(260°C).

1 2 3 4 5 6 7 8 9 10

DIP SWITCH MODULE (TYPE I AND II HAVE ONLY 6 SWITCHES)

HI TEMP

TEMP CAL

TIME

1 2 3 4 5 6 7 8 9 10

SWITCH POSITION ON OFF

RED

FROM TRANSFORMER

RED

YELLOW

BLACK

PURPLE

TO SET SWITCH

TO CONVEYOR MOTOR PICK UP

WHITE

PURPLE

YELLOW

TO THERMISTOR PROBE

To identify the module, measure the width of the case.

Type I is 51/8 inches wide Type II is 5 5/8 inches wide Type I & II have a 6 position dip switch module. Type III has a 10 position dip switch module. Type IV is 5 5/8 inches wide x 3 ¼ inches deep

Impinger I -–1000 Series Service Manual - Domestic

Type IV has adjustment pots. In the center board.

TEST PROBES SHOULD

If temperature is still inaccurate after above calibration and troubleshooting, use the following to check the High Temp. Pot. normally the High Temp. Pot. does not require

adjustment. Occasionally the pot is accidentally moved or needs adjustment. Refer to the following drawing showing proper adjustment of the High Temp. Pot.

BOTTOM OF TIME TEMP DISPLAY

test leads here reading should be 26 ± .5 ohms if not, adjust. pot. range 0-34 ohms

SWITCH, DISPLAY, SET

1. Shut off power at main breaker.

2. Remove control panel top.

3. Disconnect wires from time/temp. display terminals 5 and 6.

4. Pull off black operating knob and remove hex mounting nut.

5. Reassemble in reverse order.

PROCEDURE FOR USE OF TIME/TEMP. SIMULATOR

NOTE: DO NOT CHANGE HI TEMP POT.

READ 18 OHMS

4 7 9 10

Check incoming power to display at Terminals 1, 2, and 3. Approximately 13 VAC at 1-3, 6.5 VAC at 1-2, 6.5 VAC at 2-3. WithpowerOFF,removeleadsfrom4,5,6,7,8,9,and10.Installtime/temp.simulator to terminals 4,7,9,10. To identify display type: (MEASURE WIDTH OF COVER ON DISPLAY) Type I is 51/8 inches wide.

Type II is 5 5/8 inches wide. Type I & II have a 6 position dip switch module. Type III has a 10 position dip switch module.

Impinger I -–1000 Series Service Manual - Domestic

Dip Switch

1 2 3 4 5 6 7 8 9 10 TYPE I OFF OFF OFF ON OFF OFF TYPE II OFF OFF OFF OFF OFF OFF TYPE III OFF OFF OFF OFF OFF OFF OFF ON OFF ON

NOTE: When on 50 HZ power, dip switch #2 must be "ON" With power ON turn time and temperature cal. pot. fully counterclockwise. Display should read: (Wait 15-20 seconds) TYPE I 9:30 + 10 sec.475 + 10°F TYPE II 9:20 + 10 sec. HHH TYPE III 9:35 + 10 sec. 635 + 10°F Turn time and temp. cal. pot. fully clockwise.

Display should read: (Wait 15-20 seconds)

TYPE I 10:20 + 10 sec. 615 + 10°F

TYPE II 10:10 + 10 sec. 475 + 10°F TYPE III 10:20 + 10 sec. 475 + 10°F

Turn time pot. to 10:00 minutes and temp. pot. to 540°F. Time reading 10:00 ± 5 seconds. Temperature reading should be steady at 540°F + 10°F. If these readings are not achieved, replace display.

NOTE: After simulator test is completed, the oven Time/Temperature Display must be re-calibrated.

SWITCH REPLACEMENT (FAN, HEAT, CONVEYOR)

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove switch access cover.

4. Depress the spring clips on the sides of the switch and push out.

5. Remove wires from back of switch. Note wire number and location.

6. Install new switch in reverse order and check.

SWITCH REPLACEMENT - (FAN SWITCH UPDATE)

INSTALLATION OF DOUBLE POLE FAN SWITCH #369260 IN PLACE OF SINGLE POLE FAN SWITCH #350705

NOTE: This change is not necessary for proper operation of oven nor is it permissible to change under warranty. Should be changed only at customer's request and their agreement to pay your bill. ADVANTAGE: Allows time/temp. display, in older models, to operate same as current production models. Also allows locked time/temp. display (caused by voltage surge, interruption or spike) to be reset by fan switch rather than circuit breaker. IDENTIFICATION: To determine which fan switch you have, observe if temperature displays stays on during cooling down. If it stays on , you have the single pole switch. If it goes out as soon as fan switch is turned off you have the double

pole switch.

REPLACEMENT: Replace single pole switch # 350705. Install double pole switch # 369260. Disconnect lead indicated by # in proper diagram and reroute as shown. Install jumper lead indicated by * in proper diagram. Reapply all other leads as removed.

Impinger I -–1000 Series Service Manual - Domestic

THE FOLLOWING ITEMS ARE USED IN THE MODEL 1030, 1046, 1047

ELECTRICAL

CONNECTOR

ELECTRICAL

CONNECTOR

IMPINGER OVEN (EXPORT)

AIR PRESSURE SWITCHES - REPLACEMENT AND ADJUSTMENT

1. Remove control panel top.

2. Disconnect wires from switch making note of wire number and location for reinstallation.

3. Remove air tube from switch assembly.

4. Remove switch from wire hanger.

5. Install new switch in reverse order, make sure air tube is not blocked miss-aligned. Adjust as needed.

To adjust the air pressure switch, remove snap on cover on the side of the switch to expose adjusting screw. To increase sensitivity, turn screw counter clockwise; to decrease sensitivity, turn screw clockwise. Check for proper line voltage switching from N.C. to N.O. as the air pressure switch closes.

GAS VALVE - REPLACEMENT AND ADJUSTMENTS

1. Remove control panel top and front cover.

2. Disconnect the gas piping from the back of the unit.

3. Remove the four (4) screws from the incoming nipple mounting bracket.

4. Remove incoming nipple.

5. Disconnect two (2) plugs, (1 ) 3 prong and (1 ) 4 prong - Note location.

6. Disconnect pipe union just above gas valve and remove assembly.

7. Reassemble in reverse order (check all pipe fittings for leaks). After assembled, check for proper adjustment of gas pressure switch, 8.8 on dial for natural gas, 23 for L.P. Gas and 4.5 for town gas.

8. Check and adjust manifold pressure. Remove pressure tap located in gas piping above the gas valve prior to the burner orifice and install manometer . Adjustment screw is located on the front of the valve, remove plastic cap and adjust as needed: 3.5" W.C. for Natural Gas and 10" W.C. for L.P.

9. Check gas filter by removing cover plate (located on either side of valve). Remove four (4) screws and slide filter out of valve housing and inspect. Reassemble in reverse order and check for leaks around cover.

TOP VIEWSIDE VIEW

PRESSURE CONTROLLER ADJUSTMENT

FILTER COVER PLATE

Impinger I -–1000 Series Service Manual - Domestic

OUTPUT MANIFOLD

PRESSURE ADJUSTMENT

gnd

1 2

IGNITION CONTROL - REPLACEMENT

1. Remove control panel top and front cover.

2. Loosen two (2) locking screws on front cover of relay (approx. 1/2 turn).

3. Remove front portion of relay by pulling straight out (rocking motion).

4. Remove wires from plug-in terminal strip, note wire numbers and locations.

5. Remove two (2) screws from mounting bracket and remove.

6. Reassemble in reverse order (NOTE: Plug in terminal strip is polarized and will only allow relay to plug in one direction, make sure manual reset button lines up with access hole in front cover.) Check system operation.

HIGH - LIMIT THERMOSTAT - REPLACEMENT

1. Remove control panel top and front cover.

2. Remove conveyor and fingers.

3. Remove capillary bulb from wire form in oven chamber and pull through tube into control box.

4. Remove two (2) wires from thermostat, note wire numbers and location for reinstallation.

5. Remove screws from bracket and remove thermostat.

6. Reassemble in reverse order making sure capillary tube is placed securely in the wire form.

NOTE: Depress reset button to insure thermostat is set for operation.

SPARK GENERATOR – REPLACEMENT

1. Remove control panel top and front cover.

2. Loosen two (2) locking screws (approx. 1/2 turn) on ignition control and remove front portion of relay exposing terminal strip.

3. Remove two (2) wires for spark generator.

4. Unplug connector on bottom of spark generator.

5. Remove two (2) mounting screws and remove generator assembly.

6. Reassemble in reverse order and check system operation.

SOLENOID VALVE – REPLACEMENT

1. Remove control panel top and front cover.

2. Disconnect pipe union just above gas valve assembly.

3. Disconnect two (2) wires from solenoid, note wire number and location for reinstallation.

4. Remove four (4) nuts from main orifice burner bracket and remove assembly.

5. Replace valve and reassemble in reverse order.

6. After assembly, check all fittings for leaks and check system operation.

BURNER ALARM - REPLACEMENT

1. Remove control panel top and front cover.

2. Remove two (2) wires from alarm, note wire numbers and location.

3. Remove retainer cover from alarm and remove assembly from mounting bracket.

4. Reassemble in reverse order and check.

FLOW

Impinger I -–1000 Series Service Manual - Domestic

BURNER ALARM LIGHT - REPLACEMENT

1. Remove control panel top and front cover.

2. Remove two (2) wires from light assembly, note wire number and location.

3. Grasp body of light assembly and slide sideways to remove.

4. Reassemble in reverse order and check.

PILOT LIGHT (220V) - REPLACEMENT

1. Remove control panel top and front cover.

2. Remove switch access cover.

3. Remove two (2) wires from light assembly, note wire number and location.

4. Grasp body of light assembly and slide sideways to remove.

5. Reassemble in reverse order and check.

IGNITER SENSOR ASSEMBLY - REPLACEMENT

1. Remove control panel top and front cover.

2. Remove gas valve assembly (See Gas Valve)

3. Remove screws from burner tube and pull burner assembly out.

4. Remove wire connectors from igniter sensor assembly.

5. Remove screws from mounting bracket and remove assembly.

6. Reassemble in reverse order and check system operation. NOTE: After installation, check all pipe fittings for leaks.

BURNER BLOWER MOTOR – REPLACEMENT

1. Remove control panel top and front cover.

2. Remove screws around blower tube.

3. Disconnect motor wiring and remove.

4. Reassemble in reverse order and check system operation.

TEMPERATURE CONTROL BOARD - REPLACEMENT- MODEL 1030

1. Remove control panel top and front cover.

2. Remove potentiometer leads (3), note color and location.

3. Remove thermocouple leads (2), note color and location (white:pos/red:neg.).

4. Remove power and solenoid leads (4), note wire number and location.

5. Remove screw and board assembly and replace.

6. Reassemble in reverse order and check system operation. NOTE: When replacing #369174 with (new) #369728, turn temperature control to its maximum position and allow oven 30 minute preheat then calibrate board as follows:

Place temperature probe between top fingers #2 and #3 (making sure probe is not touching any metal) and adjust potentiometer P6 to a Maximum temperature of 575°F.

RED

POTENTIOMETER

2.5 K OHMS

transformer marked with green gold or silver dot

BLACK

WHITE

THERMOCOUPLE TYPE J

2 3

6 7

P 3

P 5P 6

L 1 120 VAC

L 2

LOAD

Impinger I -–1000 Series Service Manual - Domestic

TEMPERATURE CONTROL POTENTIOMETER - REPLACEMENT

1. Remove control panel top and front cover.

2. Remove one screw from control knob guard and move guard to one side.

3. Remove knob and locknut on control pot shaft and pushout.

4. Remove three (3) wires from temperature control board, note wire colors and location.

5. Install new control pot. in reverse order and check system operation.

6. NOTE: If temperature control knob is type with temperature numbers on it, adjust it to agree with the time/temp. display for knobs with reference numbers only, #9 is 500°F/260°C.

RELAY ASSEMBLY, BURNER BLOWER MOTOR - REPLACEMENT

1. Remove control box top and front cover.

2. Remove cover from relay box.

3. Remove wire from ignition control (#20).

4. Remove two (2) wires from transformer (#21 and #23).

5. Remove wire from burner blower motor connector plug (requires pin extractor tool (#369600) (#73).

6. Remove nut and washer from rear of relay assembly and remove assembly.

7. Install new relay in reverse order and check system operation.

TEMPERATURE CONTROL - REPLACEMENT - 1046-1047

1. Remove control panel top and front cover.

2. Remove one screw from control knob guard and move guard to one side.

3. Remove temp. control knob and locknut.

4. Remove six (6) wires from temperature control board , note wire colors and location.

5. Install new temperature control board in reverse order and check system operation.

RELAY, GAS CONTROL - REPLACEMENT - MODEL 1046,1047

1. Shut off power at main breaker.

2. Remove control panel top and front cover.

3. Remove cover from relay box.

4. Disconnect all wires and mark for replacement.

5. Remove relay by removing two (2) mounting screw.

6. Reassemble in reverse order.

TIME DELAY RELAY, 20 MINUTE - REPLACEMENT

1. Remove control box top and front cover.

2. Disconnect all wires and mark for replacement.

3. Remove center mounting screw.

4. Reassemble in reverse order. NOTE: Do not over tighten mounting screw as this may damage the internal electronic components.

CONVEYOR BEARING REPLACEMENT AND SHAFT LUBRICATION – 1200 SERIES OVENS

1. Remove conveyor from oven.

2. Remove conveyor belt.

3. Remove idle & drive shaft assemblies

4. Disassemble and clean/replace parts as needed. Use Molykote G-N metal assembly paste for lubrication.

Impinger I -–1000 Series Service Manual - Domestic

THIS PAGE INTENTIONALLY LEFT BLANK.

Impinger I -–1000 Series Service Manual - Domestic

PARTS / MODEL SERIES 1000 & 1200 - GENERAL

LETTER PART NO. DESCRIPTION

A 369003 Door Hinge B 369207 Handle Retainer

369337 Retainer (See page 62) C 369110 Access Window (See page 62) D 369209 Latch & Strike E 369828 Handle Spacer F 369157 Complete Door G 1534 Finger Support Assy. H 369057 Support Bracket Pins

I 369643 Strike Assy.

J 1009 Oven Top K 369062 Top, Control Panel L 369046 Flue Assy. (Gas)

369367 Flue Assy. (Electric) M 369140 Compression Spring N 369903 Flat Washer, 5/16” O 369141 Conveyor Hold Down Bracket

P 369139 Shoulder Screw

Q 369058 Baffle, Inlet and Outlet

369211 Thumb Screw R 369369 Seam Cover, Conveyor Opening

S 369203 Stud Wing Head T 369749 Chain Cover Assy. ( S/N Q14974 & Above)

U 369204 Split Ring Retainer

V 369373 Receptacle, Snap In

W 369205 Chain Guard Cover – S/N 2164 to Q14973

X 369651 Top, Chain Guard – S/N 2164 to Q14973 Y 369379 Bottom Chain Guard – S/N 2164 to Q14973

Z 369052 Adjustable Leg AA 369030 Caster – 6” BB 369328 Leg, Stand

CC 369904 Insulation Holder DD 369218 Internal Crumb Pan

EE 369053 Finger Housing FF Columnating Plates (See Installation Manual)

GG 369055 Finger Cover HH 369748 Bracket, Chain Cover – S/N Q14974 & Above

JJ 369690 Label, Time/Temp Display Cover

KK 370048 Instrument Cover

LL 369673 Thermostat Guard

MM 369244 Instrument Cover Assy.

NN 369887 Instrument Cover Label

OO 369886

369199

Window Fº Window Cº

PP 369246 Display Bezel

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / 1000, 1200 – GENERAL

Impinger I -–1000 Series Service Manual - Domestic

PARTS / ACCESS DOOR & 1050 DOOR

LETTER PART NO. DESCRIPTION

369110 Complete Access Window Assy. A 369310 Screw, 6-32 x 3/16” B 369377 Screw, 8-32 x 3/8” C 369308 Bottom, Access Window Assy. D 369111 Glass, Old Style 4 9/32” X 20”

369334 Glass, New Style 4” x 20” E 350638 Handle

F 369311 Handle Spacer (2 required) G 369309 Top, Access Window Assy. H 369336 Door Latch

I 369906 Screw, 8-32 x 5/8”

J 369230 Screw, 8-32 x ¾” K 369112 Ball Catch

L 350257 Screw, 6-32 x 3/8” M 369229 Adapter Plate N 369337 Retainer, New Style O 369207 Retainer, Old Style P 369004 Door Latch & Catch Q 369031 Complete Door Assy. R 369015 Door Gasket S 369049 Vertical Retaining Plate

T 369051 Retaining Plate Screw U 369050 Horizontal Retaining Plate V 369003 Door Hinge

W 369926 Window Frame, Bottom

X 369925 Glass, Access Window Y 369927 Window Frame, Top

Z 369930 Screw, 10-32 x ¼”

AA 369931 Screw, 8-32 x 3/8” BB 369929

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / ACCESS DOOR & 1050 DOOR

Impinger I -–1000 Series Service Manual - Domestic

PARTS / MODEL 1000,1001,1050,1051,1004, &1005 – S/N 100 TO 4389

LETTER PART NO. DESCRIPTION

A 369012 Fuseholder

369013 Fuse, 3 Amp B 369014 Fuse, 10 Amp C 369066 Sprocket, Drive - Prior to S/N 4390 D 369260 Switch, ON/OFF E 350225 Lens, Red

F 369104 Pilot Light, 24 VAC G 369025 Blower Air Switch H 369022 Conveyor Motor - Prior to S/N 4390

369113 Brush 369114 Brush Cap 369115 Brush Spring

I 369032 Relay

J 369008 D. C. Conveyor Controller - S/N 4389 & Below K 369079 Relay Cover

L 369080 Reverse Switch w/Harness - Prior to S/N 4390 M 369007 Temperature Sensing Switch

369902 Sensing Rod Switch N N. L. A See Burner Blower Motor - Page 34 O 369531 Transformer, 120/24V- 40VA P 369366 Burner Blower Motor Kit Q 369009 Thermocouple R 369029 Temperature Gauge S 369108 Thermostat Knob (Degree F)

T 369263 Gas Valve (Body Only), NAT/LP

369393 Ignition Control, NAT & LP U 369344 Pilot Shut Off Valve V 369006 Temperature Control Valve

W 369072 Main Burner Orifice, Natural Gas

369099 Main Burner Orifice, LP X 369144 Pilot Shield, Extension Y 369202 Pilot Shield, Main

Z 369075 Flame Sensor

A A 369073 Pilot Orifice, Natural Gas

369100 Pilot Orifice, LP

B B 369076 Burner Ignitor C C 369142 Flame Target D D 369067 Air Switch Tube E E 369063 Conveyor Speed Controller - Prior to S/N 4390

F F 369064 Conveyor Speed Control Dial

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / 1000, 1001, 1050, 1051, 1004, & 1005 S/N 100 TO 4389

Impinger I -–1000 Series Service Manual - Domestic

PARTS / MODEL 1000,1001,1004, AND 1005 S/N 4390 & ABOVE

LETTER P/N DESCRIPTION

A B 369248 Knob

369064 Conveyor Speed Control Dial (Non-Digital Display Ovens) C 369012 Fuseholder D 369013 Fuse, 3 Amp

369014 Fuse, 10 Amp

E 369158 10 Tooth Sprocket - S/N 4390 & Above

F 350705 Switch ON/OFF G 369260 Double Pole Fan Switch H 350225 Lens, Red

I 369104 Pilot Light, 24 VAC

J 369507 Cooling Fan Thermostat K SEE PAGE 82 L 369025 Blower Air Switch

M 369032 Relay N 369155 Conveyor Motor Control Board

357028 Fuse, Non Delay, 1A 250V 369201 Fuse, 4 Amp, 250V

O 369240 Hi Hat

P 369173 Control Transformer

Q 369363 Unit Relay Cover Top LH R 369154 0.7 Amp Circuit Breaker

S 369007 Temperature Sensing Switch

369902 Sensing Rod Kit

T N. L. A. See Burner Blower Motor - Page 34

U 369531 Transformer 120/24V - 40VA

V 369366 Burner Blower Motor Kit

W 369331 Finger Guard, Cooling Fan

X 369167 Set Switch Assy. Y 369172 Digital Display

369029 Temperature Gauge (Not Shown) 369009 Thermocouple (Not Shown) used with Temperature Gauge

Z 369108 Thermostat Knob (Degree F)

AA 369263 Gas Valve (Body Only) NAT/LP

369393 Ignition Control NAT & LP B B 369344 Pilot Shut Off Valve C C 369086 Pilot Line Assy - S/N 121 & Above D D 369006 Temperature Control Valve E E 369072 Main Burner Orifice Natural Gas

369099 Main Burner Orifice LP F F 369144 Pilot Shield Extension

G G 369202 Pilot Shield Main

H H 369075 Flame Sensor

I I 369073 Pilot Orifice Natural Gas

369100 Pilot Orifice LP

JJ 369076 Burner Igniter

K K 369142 Flame Target

L L 369124 Cooling Fan Control Box MM 369152 Oven Conveyor Control Pot. N N 369193 Thermistor Probe

369247

Shaft Lock Ring

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP 1000, 1001, 1004, 1005 S/N 4390 & ABOVE

Impinger I -–1000 Series Service Manual - Domestic

PARTS / 1022-1023

LETTER P/N DESCRIPTION

A 369247 Shaft Lock Ring B 369012 Fuseholder

369129 Fuseholder, Main Fan

C 369013 Fuse, 3 Amp

369130 Fuse, 15A

D 369064 Conveyor Speed Control Dial-Non Digital Display Units

369248 Knob E 369260 Switch, ON/OFF F 369066 Sprocket, Drive - Prior to S/N 4390 & S/N Q19078 and above

369158 10 Tooth Sprocket - S/N 4390 to S/N Q19077 G 369605 Transformer (Stepper) H 350225 Lens, Red

I 369128 Neon Pilot Light, 125 VAC

J 369022 Motor, Conveyor - S/N 4389 & Below

SEE PAGE 82 S/N 4390 & Above

369113 Brush (For 369022)

369114 Brush Cap (For 369022)

369115 Brush Spring (For 369022) K 369120 Contactor, 60A

L 369127 Hi Limit Thermostat

357067 Thermostat, Capillary

M 353014 Supply Terminal (Ground)

N 369118 Power Terminal Block O 369007 Temperature Sensing Switch

369902 Sensing Rod Kit P 369154 0.7 Amp Circuit Breaker

369640 Control (Stepper) S/N Q19078 & Above

357028 Fuse, Non Delay, 1 A 250V

369201 Fuse, 4 Amp, 250V T 369240 Hi Hat U 369167 Set Switch Assy.

370046 Button Only V 369172 Digital Display

369029 Temperature Gauge (S/N Q5276 & Down) Uses 369009 T-Couple

W 369342 Knob, Temperature Control

X 369193 Thermistor Probe Y 369340 Potentiometer, Temp. Control & Harness Z 369132 Temperature Control Board

A A 369173 Control Transformer

B B 369131 Thermocouple Probe Assy. C C 369032 Relay D D 369124 Cooling Fan, Control Box

369535 Cord Set, Cooling Fan

EE 369025 Blower Air Switch

FF 369067 Air Switch Tube

GG 369063 Conveyor Speed Controller S/N 4389 & Below

369153 Electric Conveyor Control Pot. S/N 4390 to Q19077 369391 Speed Pot. (Stepper) S/N Q19078 & Above

Not Shown 369080 Reversing Switch – S/N 4389 & Below

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / 1022, 1023

Impinger I -–1000 Series Service Manual - Domestic

PARTS / 1040-1041

LETTER P/N DESCRIPTION

A B C

D E

H 350225 Red Lens

I 369104 Pilot Light 24 VAC J SEE PAGE 82 K 369507 Cooling Fan Thermostat L 369025 Blower Air Switch

M 369032 Relay

N 369155 Conveyor Motor Control Board - S/N 4390 - Q14973

369640 Control Stepper- S/N Q14974 & Above 357028 Fuse, Non Delay, 1 A 250V 369201 Fuse, 4 Amp, 250V

O 369240 Hi Hat

P 3691730 Control Transformer

Q 369363 Unit Relay Cover, Top LH

R 369131 Thermocouple Probe Assy S 369270 Electronic Temperature Control Q18037 & Below T N. L. A. See Burner Blower Motor - Page 34 U 369531 Transformer, 120/24V - 40VA V 369366 Burner Blower Motor Kit

W 369331 Finger Guard, Cooling Fan

X 369193 Thermistor Probe Y 369167 Set Switch Assy.

370046 Button Only

Z 369172 Digital Display

AA 369316 Knob, Temperature Adjustment

B B 369263 Gas Valve (Body Only), NAT/LP

369393 Ignition Control, NAT & LP C C 369344 Pilot Shut Off Valve D D 369317 Potentiometer, Temperature Adjustment w/Faceplate

E E 369398 Solenoid Valve, NAT & LP F F 369072 Main Burner Orifice, Natural Gas

369099 Main Burner Orifice, LP G G 369144 Pilot Shield, Extension H H 369202 Pilot Shield, Main

I I 369075 Flame Sensor JJ 369073 Pilot Orifice, Natural Gas

369100 Pilot Orifice, LP

K K 369076 Burner Ignitor

L L 369142 Flame Target

MM 369007 Temperature Sensing Switch

369902 Sensing Rod Kit N N 369154 0.7 Amp Circuit Breaker O O 369124 Cooling Fan, Control Box

P P 369067 Air Switch Tube QQ 369152 Potentiometer, conveyor S/N 4390 - Q14973

369391 Potentiometer, conveyor S/N Q14974 & Above

RR 369316 Knob, temperature control SS 369801 Thermostat

TT 370058 Jumper, thermocouple

369247 369012 369013 369014

369248 369158 369066

369260 369605

Shaft Lock Ring Fuseholder Fuse, 3 Amp Fuse, 10 Amp

Knob 10 Tooth Sprocket - S/N 4390 to Q14973 Sprocket - S/N 14974 & Above

Switch, ON/OFF Transformer (Stepper)

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / 1040, 1041

Impinger I -–1000 Series Service Manual - Domestic

PARTS / 1200, 1201, 1204 AND 1205

LETTER

G G 369142 Flame Target

A B C D

E G H

P/N

369012 369014 369252 369248 369247 369260 350225 369507 369104 369193

DESCRIPTION

Fuseholder Fuse, 10 Amp Paddle Switch Knob Shaft Lock Ring Switch, ON/OFF Lens, Red Cooling Fan Thermostat Pilot Light, 24 VAC Thermistor Probe

K 369025 Blower Air Switch

L 369032 Relay

M 369007 Temperature Sensing Switch

369902 Sensing Rod Kit N 369173 Control Transformer O 369363 Unit Relay Cover, Top LH P N. L. A See Burner Blower Motor - Page 34 Q 369531 Transformer, 120/24V - 40VA R 369366 Burner Blower Motor Kit S 369331 Finger Guard, Cooling Fan

T 369167 Set Switch Assy.

370046 Button Only U 369172 Digital Display V 369108 Thermostat Knob (Degree F)

W 369263 Gas Valve (Body Only), NAT/LP

369393 Ignition Control, NAT & LP X 369344 Pilot Shut Off Valve Y 369006 Temperature Control Valve

Z 369086 Pilot Line Assy - S/N 121 & Above

A A 369072 Main Burner Orifice, Natural Gas

369099 Main Burner Orifice, LP

BB 369144 Pilot Shield, Extension C C 369202 Pilot Shield, Main D D 369075 Flame Sensor E E 369073 Pilot Orifice, Natural Gas

369100 Pilot Orifice, LP

F F 369076 Burner Ignitor

H H 369124 Cooling Fan, Control Box

JJ 369067 Air Switch Tube

KK 369253 Speed Pot., "A"

369254 Speed Pot., "B"

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / 1200, 1201, 1204, 1205

Impinger I -–1000 Series Service Manual - Domestic

PARTS / 1202-1203

LETTER P/N DESCRIPTION

A 369247 Shaft Lock Ring B 369129 Fuseholder, 15A

369012 Fuseholder

C 369013 Fuse, 3 Amp

369130 Fuse, 15A D 369248 Knob E 369252 Paddle Switch

F 369260 Switch, ON/OFF

H 350225 Lens, Red

I 369128 Neon Pilot Light, 125 VAC

J 369025 Blower Air Switch

K 369120 Contactor, 60A

L 369127 Hi Limit Thermostat M 353014 Supply Terminal (Ground) N 369118 Power-Terminal Block O 369007 Temperature Sensing Switch

369902 Sensing Rod Kit Q 369119 60A Fuseholder R 369134 Fuse, 50A S 369193 Thermistor Probe

T 369167 Set Switch Assy

370046 Button Only U 369172 Digital Display V 369342 Knob, Temperature Control

W 369340 Potentiometer, Temp. Control Harness

X 369132 Temperature Control Board Y 369173 Control Transformer

Z 369032 Relay A A 369131 Thermocouple Probe Assy. B B 369124 Cooling Fan, Control Box C C 369067 Air Switch Tube D D 369253 Speed Pot., "A" S/N 14974 & Below

369254 Speed Pot., "B" S/N 14974 & Above

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / 1202, 1203

Impinger I -–1000 Series Service Manual - Domestic

PARTS / 1240-1241

LETTER P/N DESCRIPTION

A 369012 Fuseholder

B 369014 Fuse, 10 Amp

C 369248 Knob D 369247 Shaft Lock Ring

E 369260 Switch, ON/OFF

G 350225 Lens, Red H 369507 Cooling Fan Thermostat

I 369104 Pilot Light, 24 VAC

J 369025 Blower Air Switch K 369032 Relay L 369363 Unit Relay Cover, Top LH

M 369131 Thermocouple Probe Assy N 369270 Electronic Temperature Control O N. L. A. See Burner Blower Motor - Page 34

P 369531 Transformer, 120/24V - 40VA

Q 369366 Burner Blower Motor Kit R 369331 Finger Guard, Cooling Fan

S 369193 Thermistor Probe T 369167 Set Switch Assy.

370046 Button Only

U 369172 Digital Display

V 369316 Knob, Temperature Adjustment

W 369263 Gas Valve (Body Only), NAT/LP

369393 Ignition Control, NAT & LP X 369344 Pilot Shut Off Valve Y 369317 Potentiometer, Temperature Adjustment w/Faceplate Z 369398 Solenoid Valve, NAT & LP

AA 369086 Pilot Line Assy - S/N 121 & Above

B B 369072 Main Burner Orifice, Natural Gas

369099 Main Burner Orifice, LP

C C 369144 Pilot Shield, Extension D D 369202 Pilot Shield, Main E E 369075 Flame Sensor F F 369073 Pilot Orifice, Natural Gas

369100 Pilot Orifice, LP

G G 369076 Burner Ignitor

H H 369142 Flame Target

I I 369007 Temperature Sensing Switch

369902 Sensing Rod Kit

JJ 369252 Paddle Switch

K K 369124 Cooling Fan, Control Box

L L 369067 Air Switch Tube

MM 369253 Speed Pot., "A" S/N 4390 - Q14790

369254 Speed Pot., "B" S/N 4390 - Q14790

369652 Speed Pot., (Stepper) S/N Q14791 & Above

N N 369316 Knob

O O 369801 Thermostat

P P 370058 Thermocouple Jumper

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / 1240, 1241

Impinger I -–1000 Series Service Manual - Domestic

PARTS / OVEN BACK - GAS

LETTER

Not Shown 369318 Cone Conversion Kit 60 HZ

Not Shown 369321 Cone Conversion Kit 50 HZ

A B

C D

F G H

I J K

P/N

369048 369212 369214 369192 369045 369306 369646 369647 369213

N.L.A. 369026 369215 369028 369020

DESCRIPTION

Motor and Fan Cover Motor, S/N begins with a"Q" Motor, 50 Hz, 240V Capacitor 7.5 MFD, 370 VAC Oven Back- S/N 4612 & Below Oven Back Assy. - S/N 4613 & Above Rod, Stand Off Inlet Panel, 16" Fan, S/N begins with a "Q" See Page 86 See Conversion Kits Below Heat Slinger Bar Motor Support Assy - S/N Q4613 & Above Motor Mount Support Assy. - S/N 4612 & Below

Oven Fan Motor- S/N 4612 & Below M 369027 Motor Cooling Fan N 369545 Wire Form, Thermostat Bulb

369547 Wire Form, Thermostat Bulb -1040 Series

Replaces N.L.A. Fan Assy. with New Style Oven Back Assy.

Replaces N.L.A. Fan Assy. with New Style Oven back Assy.

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / OVEN BACK – GAS

Impinger I -–1000 Series Service Manual - Domestic

PARTS / OVEN BACK- ELECTRIC

LETTER P/N DESCRIPTION

A 369699 Rear Cover Assy. B 369212 Motor, S/N begins with a "Q"

369214 Motor, 50 Hz, 240V C 369192 Capacitor 7.5 MFD, 370 VAC D 369307 Oven Back Assy. - S/N 4768 & Above E 369122 240V Heating Element

369287 208V Heating Element

369315 220V Heating Element

F 369647 Inlet Panel, 16" G 369213 Fan, S/N begins with a "Q" H See Detail Page 86

I N.L.A See Conversion Kits Below

J 369646 Rod, Stand Off K 369026 Heat Slinger Bar

L 369215 Motor Support Assy - S/N Q4768 & Above

369028 Motor Mount Support Assy. - S/N Q4767 & Below M 369020 Oven Fan Motor- S/N Q4767 & Below N 369027 Motor Cooling Fan O 369547 Wire Form, Thermostat Bulb- Electric Ovens

Not Shown 369319 Cone Conversion Kit 208V 60 HZ

Replaces N.L.A. Fan Assy. with New Style Oven Back Assy

Not Shown 369320 Cone Conversion Kit 240V 60 HZ

Replaces N.L.A. Fan Assy. with New Style Oven Back Assy.

Not Shown 369322 Cone Conversion Kit 220V 50 HZ

Replaces N.L.A. Fan Assy. with New Style Oven Back Assy.

Not Shown 369323 Cone Conversion Kit 240V 50 HZ

Replaces N.L.A. Fan Assy. with New Style Oven Back Assy.

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / OVEN BACK – ELECTRIC

Impinger I -–1000 Series Service Manual - Domestic

PARTS / CONVEYOR MOTOR ASSEMBLY S/N 4390 & ABOVE

LETTER P/N DESCRIPTION

A 369291 Motor, DC - Conveyor

369384 Motor Brush Assy. B 369294 #4 Lockwasher C 369296 Screw, 4-40 x 1/4 D 369290 Optical Encoder Assy. E 369151 Coupling and Encoder Disc (.050 in. Allen Wrench included)

F 369146 Hex Nut, 4-40 G 369294 #4 Lockwasher H 369292 Bracket, Tach. Generator

I 369297 Screw, 6-32 x 1/4

J 369156 #6 Lockwasher K 369293 Screw, 4-40 x 3/8

L 369150 Tach. Generator M 369298 Dust Cover N 369299 Bushing O 350247 Screw, 10-32 x 3/8 P 369295 #10 Lockwasher Q 369603 Stepper Motor Gearbox Assy. - includes R, S, T, U R 369737 Hall Effect Sensor S 369900 #8 Lockwasher

T 369658 Screw, 8-32 x 1/4 U 369736 Magnet

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / CONVEYOR MOTOR ASSEMBLY S/N 4390 & ABOVE

Impinger I -–1000 Series Service Manual - Domestic

PARTS / SERIES 1000 – CONVEYOR

LETTER P/N DESCRIPTION

A 369002 Tension Knob, Conveyor

B 369314 Roll, Conveyor-Notched C 369835 Conveyor Frame Assy. D 369312 Conveyor Shaft, Idler

E 369160 Conveyor Pan Stop

F 369641 Idle Bearing Bracket G 369220 Idle Bearing H 369005 Conveyor Belt Connecting Link

I 369237 Conveyor Drive Shaft

J 369161 Roller Chain Sprocket, S/N 2164-Q14973 (Gas)

S/N 2164-Q19077 (Electric) 369066 Drive Sprocket S/N Q14974 & Above (Gas) S/N Q19078 & above (Electric)

369413 Drive Key K 369219 Rod End, Female L 369644 Screw 1/2-20 x 3/4

M 369206 Crumb Pan N 369163 Conveyor Belt

369362 Conveyor Belt by Foot

O 369143 Crumb Pan

P 369036 Drive Bearing Assy.

Q N.L.A. Conveyor Frame

(Replace with 369117 Complete Conveyor Assy.)

R 369380 Conveyor Guard Strap

S 369060 L.H. Conveyor Guard Assy. T 369037 Snap Ring

U 369034 L.H. Conveyor Idler Bearing Assy.

V 369035 R.H. Conveyor Idler Bearing Assy.

W 369042 Idler Shaft

X 369039 Blank Drive Gear Y 369038 Notched Drive Gear Z 369043 Drive Shaft

A A 369059 R.H. Conveyor Guard Assy. B B 369040 Conveyor Sprocket (Uses 369042 Key

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / SERIES 1000 CONVEYOR

Impinger I -–1000 Series Service Manual - Domestic

PARTS / SERIES 1200 - CONVEYOR CONTROL

LETTER P/N DESCRIPTION

A SEE PAGE 82 B 369012 Fuseholder

C 369013 Fuse, 3 Amp D 369240 Hi Hat

E 369155 Conveyor Motor Control, "A" S/N Q4613 to Q14973

369640 Conveyor Control (Stepper) S/N Q14974 & Above

357028 Fuse, Non Delay, 1A 250V

369201 Fuse, 4 Amp, 250V F 369272 Conveyor Motor Control "B" S/N Q4613 to Q14973

357028 Fuse, Non Delay, 1A 250V

369201 Fuse, 4 Amp, 250V

G 369154 0.7 Amp Circuit Breaker H N. L.A.

I 369665 Chain Guard

J 369289 Sprocket, 5/8" - S/N Q14791 & Below

369242 Sprocket, 1/2" (Stepper) S/N Q14791 & Above K 369696 Clip, Chain Guard L 369124 Cooling Fan, Control Box

M 369605 Transformer (Stepper)

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / SERIES 1200 – CONVEYOR CONTROL

Impinger I -–1000 Series Service Manual - Domestic

PARTS / SERIES 1200 – CONVEYOR

LETTER P/N DESCRIPTION

A 369277 Retaining Block, Inner B 369275 Flanged Bearing, .50 ID

C 369276 Inner Drive Shaft D 369274 Flanged Bearing, .75 ID

E 369279 Retaining Block, Outer F 369278 Outer Drive Shaft

G 369241 Sprocket 3/4" Bore

369242 Sprocket 1/2" Bore

H 369005 Conveyor Belt Connecting Links

I 369280 Idler Shaft, Inner J 369284 Collar Shaft Spacer K 369039 Blank Drive Gear L 369038 Roll, Conveyor, Notched

M 369281 Idler Shaft, Outer N 369160 Conveyor Pan Stop O 350238 Nut, 10-24

P 369697 Lockwasher, SS #10

Q 369282 Compression Spring R 369206 Crumb Pan

S 369273 Complete Conveyor Belt

Not Shown 369249 Drive Chain, Long Not Shown 369250 Drive Chain, Short Not Shown 369817 Drive Chain, Long (Stepper Drive) Not Shown 369818 Drive Chain, Short(Stepper Drive)

Impinger I -–1000 Series Service Manual - Domestic

BLOW UP / SERIES 1200 – CONVEYOR

Impinger I -–1000 Series Service Manual - Domestic

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Impinger I -–1000 Series Service Manual - Domestic

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Impinger I -–1000 Series Service Manual - Domestic

Lincoln 1004 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual