Lincoln Lincoln Oven 1100ADVSVC, Lincoln Oven 1117-000-A User Manual

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SERVICE MANUAL

(DOMESTIC)

IMPINGER CONVEYOR OVENS

IMPINGER II - ADVANTAGE SERIES

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

1100AdvSvc

REV 1/5/07

TABLE OF CONTENTS

 

TABLE OF CONTENTS

2

SEQUENCE OF OPERATIONS

4

SEQUENCE OF OPERATIONS

5

SCHEMATIC 1116-000-A, 1117-000-A

6

SCHEMATIC 1130-000-A / 1131-000-A

7

SCHEMATIC 1132-000-A / 1133-000-A

8

TROUBLESHOOTING GUIDE / GAS OVENS

9

TROUBLESHOOTING GUIDE / ELECTRIC OVENS

14

REMOVAL, INSTALLATION, AND ADJUSTMENT

18

PARTS / GENERAL

26

BLOW UP / GENERAL

27

PARTS / CONTROL BOX 1116-000-A, 1117-000-A

28

BLOW UP / CONTROL BOX – 1116-000-A, 1117-000-A

29

PARTS / CONTROL BOX – 1130-000-A THRU 1133-000-A

30

BLOW UP / CONTROL BOX – 1130-000-A THRU 1133-000-A

31

PARTS / CONVEYOR & DOOR

32

BLOW UP / CONVEYOR & DOOR

33

PARTS / OVEN BACK ASSEMBLY

34

BLOW UP / OVEN BACK ASSEMBLY

35

2

Impinger II – Advantage Service Manual - Domestic

SEQUENCE OF OPERATIONS

IMPINGER II ADVANTAGE

MODEL 1116-000-A / NATURAL GAS / 120 VAC / 60 HZ / 1 PHASE

MODEL 1117-000-A / L.P. GAS / 120 VAC / 60 HZ / 1 PHASE

POWER SUPPLY

Electrical power is supplied to the oven by a three conductor cordset. Voltage

 

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

 

conductor is neutral. The green conductor is ground.

CONTROL BOX AUTO

When the temperature in the control box reaches 120°F ± 3°(48.9°C ± 1.7°C),

 

the

COOL DOWN

interrupt power to the fans when the control box temperature falls to 100°F ± 3°

 

(37.8°C ± 1.7°C).

MAIN FAN CIRCUIT

Power is permanently supplied, through a 10A fuse, and through a normally

 

closed control box hi-limit thermostat, to the normally open main fan switch.

 

Power is also supplied to the normally open cooling fan thermostat. Closing the

 

main fan switch supplies 120 VAC to the main fan motor, the cooling fan motor,

 

the primary of the temperature display transformer, the heat and conveyor

 

circuits.

BURNER CIRCUIT

Closing the main fan switch supplies 120 VAC to the burner blower motor. 120

 

VAC is also supplied, through the normally closed oven cavity hi-limit thermostat,

 

the main fan centrifugal switch (this switch closes when main fan reaches

 

approximately 1600 RPM) to the electronic temperature control and to the

 

primary of the burner transformer.

IGNITION CONTROL

The ignition control operates on both 24 VAC and 120 VAC. When the control is

 

energized by 24 VAC from the transformer, 120 VAC is switched by the ignition

 

control to the hot surface ignitor for 45 seconds for the hot surface ignitor warm

 

up. The ignitor glows red, 24 VAC is switched to the gas valve which opens and

 

ignition should now occur.

TEMPERATURE CONTROL

When the centrifugal switch of the main fan motor closes, power is applied to the

 

temperature control. The 1K ohm temperature pot 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. The heat lamp is

 

energized with the solenoid valve.

CONVEYOR DRIVE

Closing the on/off 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 will change resistance at terminals

 

P1 and P2 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.

NOTE:

The conveyor control uses a sensor and magnet, mounted on the conveyor

 

motor that senses the motor speed. Any change in motor load (±RPM) is

 

detected by the sensor and the voltage to the motor is adjusted accordingly.

Temperature Display

Closing the switch supplies 120 VAC to the primary of the temperature display

 

transformer. The secondary of this transformer supplies 12 VAC to the temperature

 

display. The thermocouple supplies D.C. millivolts to the temperature display. The

 

display converts this millivolt reading to a temperature reading.

Impinger II –Advantage Service Manual - Domestic

3

SEQUENCE OF OPERATIONS

 

1130-000-A / 208V / SINGLE PHASE

 

1131-000-A / 240V / SINGLE PHASE

 

1132-000-A / 208V / THREE PHASE

 

1133-000-A / 240V / THREE PHASE

POWER SUPPLY

Electrical power to be supplied to the oven by a three-conductor service on single

 

phase and a four-conductor service on three phase.

 

Black conductor is Hot

 

Red conductor is Hot

 

Orange conductor is Hot (Used on 3 phase only)

 

Green conductor is ground.

CONTROL BOX AUTO COOL DOWN

When the temperature in the control box reaches 120°F ± 3°F (48.9°F ± 1.7°C),

 

the cooling fan thermostat will switch power to the cooling fans. The thermostat

 

will interrupt power to the fans when the temperature falls to 100°F ± 3°F (37°C ±

 

1.7°C).

MAIN FAN CIRCUIT

Power is permanently supplied through the 10A fuses, through the normally

 

closed control box high limit thermostat, to the normally open main fan switch.

 

Power is also supplied to the normally open cooling fan thermostat. Closing the

 

main fan switch supplies 208/240 VAC to the main fan motor, the cooling fan

 

motor, to the primary of the temperature display transformer and to the heat and

 

conveyor circuits.

HEATER CIRCUIT

Closing the fan switch supplies 208/240 VAC, through the normally open air

 

pressure switch (closed by air pressure from the main fan) through the normally

 

closed oven cavity hi-limit thermostat, to the electronic temperature control. The

 

1K ohm temperature pot is adjusted to desired temperature. The thermocouple

 

will provide varying millivolts to the temperature controller. The temperature

 

control then supplies 208/240 VAC to the coil of the contactor at intermittent

 

intervals to maintain the desired temperature. The heat lamp is energized with

 

the contactor.

CONVEYOR DRIVE

Closing the on/off 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 will change resistance at terminals

 

P1 and P2 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.

NOTE:

The conveyor control uses a sensor and magnet, mounted on the conveyor

 

motor that senses the motor speed. Any change in motor load (±RPM) is

 

detected by the sensor and the voltage to the motor is adjusted accordingly.

Temperature Display

Closing the switch supplies 120 VAC to the primary of the temperature display

 

transformer. The secondary of this transformer supplies 12 VAC to the

 

temperature display. The thermocouple supplies D.C. millivolts to the

 

temperature display. The display converts this millivolt reading to a temperature

 

reading.

4

Impinger II – Advantage Service Manual - Domestic

SCHEMATIC 1116-000-A, 1117-000-A

Impinger II –Advantage Service Manual - Domestic

5

SCHEMATIC 1130-000-A / 1131-000-A

6

Impinger II – Advantage Service Manual - Domestic

SCHEMATIC 1132-000-A / 1133-000-A

Impinger II –Advantage Service Manual - Domestic

7

TROUBLESHOOTING GUIDE / GAS OVENS

 

MODEL 1116-000-A

NATURAL GAS

120 VAC

60 HZ

1 PHASE

 

MODEL 1117-000-A

LP GAS

 

120 VAC

60 HZ

1 PHASE

 

 

 

 

 

 

 

 

SYMPTOM

POSSIBLE CAUSE

EVALUATION

 

 

 

 

Oven fan will not run

Incoming Power Supply

Check breakers, reset it required. Check power plug

 

 

 

 

to be sure it is firmly in receptacle. Measure

 

 

 

 

incoming power/call power company if needed.

 

 

Fuse, 10 Amp

 

Check, replace if necessary.

 

 

 

 

Fuse Holder

 

Check, replace if necessary.

 

 

 

 

Hi Limit Thermostat-Control

Check for voltage on both sides of the switch.

 

 

Box

 

Terminals are normally closed. If open, reset and

 

 

 

 

test oven for proper operation. If thermostat will not

 

 

 

 

hold and control box temperature is not exceeding

 

 

 

 

140°F (60°), replace thermostat.

 

 

Main Fan Switch

 

Check continuity between switch terminals.

 

 

Main Fan Motor

 

Check for opens, shorts, or grounds. WITH POWER

 

 

 

 

OFF turn fan blade to check for locked rotor.

 

 

Capacitor

 

Check for shorts or grounds.

 

 

 

 

 

 

WARNING: Capacitor has a stored charge,

 

 

 

 

discharge before testing.

 

 

 

No control box cooling

Incoming Power

 

Check main circuit breakers, reset if required, call

 

 

 

 

power company if needed.

 

 

 

 

Main Fan Switch

 

Check continuity between switch terminals

 

 

Cooling Fan

 

120 VAC should now be at the fan motor. If voltage

 

 

 

 

is present, check motors for shorts or opens. WITH

 

 

 

 

POWER OFF: Check for locked rotor.

 

No automatic control

Incoming Power Supply

Check circuit breakers,

 

 

 

box cooling

 

 

reset if required. Call the power company if needed.

 

 

Cooling Fan Thermostat

Check the cooling fan thermostat. (Thermostat

 

 

 

 

closes at 120°F and opens at 100°F). With the

 

 

 

 

cooling fan thermostat preheated, check for

 

 

 

 

continuity. If switch is open, replace.

 

 

Cooling Fan

 

120 VAC should be at the motor. If voltage is

 

 

 

 

present, check motor for shorts, opens, or grounds.

 

 

 

 

WITH POWER OFF: check for locked rotor.

 

Oven will not heat

Gas Supply

 

Check for adequate gas supply and closed manual

 

 

 

 

gas shut offs. Also, check flexible gas line

 

 

 

 

connection.

 

 

 

 

 

Main Fan

 

If not operating, refer to "Oven fan will not run".

 

 

High Limit Oven Cavity

Terminals are normally closed. If

 

 

Thermostat

 

open, push in reset button and retest. If thermostat

 

 

 

 

will not hold for maximum oven temperature, and

 

 

 

 

oven is not exceeding temperature dial setting,

 

 

 

 

check for proper location of capillary bulb in its

 

 

 

 

spring holder. If above checks okay, replace hi-limit

 

 

 

 

thermostat.

 

 

 

 

 

Centrifugal Switch

Check for 120 VAC at lead #9

 

 

 

 

of Main Fan Motor

(located at 6 pin connector in raceway near the main

 

 

 

 

fan motor) to neutral. If no voltage is present, and

 

 

 

 

motor is running, replace motor.

8

 

 

 

Impinger II – Advantage Service Manual - Domestic

 

Burner Blower Motor

Visually check to see if motor is running. If not,

 

 

check for 120 VAC to motor at motor connector (wire

 

 

#5 and #22). If voltage is not present, trace wiring

 

 

back to fan switch. If voltage is present and motor is

 

 

not running, check for opens, shorts, or grounds.

 

 

Also, WITH POWER OFF: check for locked rotor.

 

Transformer, Burner

Primary is 120 VAC with 24 VAC secondary. If 120

 

 

VAC is not present, trace wiring back to Main Fan

 

 

Centrifugal Switch. If 120 VAC is present, check for

 

 

24 VAC at secondary of transformer. If no voltage is

 

 

present, replace transformer.

 

Centrifugal Switch of Burner

Check of 120 VAC at motor connector, on wire #13

 

Blower Motor

to neutral. If voltage is not present, trace wiring back

 

 

to transformer. If voltage is not present and motor is

 

 

running, replace the burner blower motor.

 

Ignition Control

24 volts should be present at 24 volt terminals. If not

 

 

present, trace wiring back to centrifugal switch.

 

 

When 24 VAC is supplied, the control switches 120

 

 

VAC from L1 and L2 to the hot surface ignitor. if 120

 

 

VAC is not present at L1 and L2, trace wiring

 

 

back to fan switch. If 24 VAC and 120 VAC are

 

 

present and 120 VAC is not across the hot surface

 

 

ignitor terminals, replace the ignition control.

 

Hot Surface Ignitor

If 120 VAC is present at hot surface ignitor terminals,

 

 

visually check to see that the ignitor is heating.

 

 

(Ignitor may be viewed through the port glass in end

 

 

of burner tube.) The ignitor should glow bright red.

 

 

If the ignitor does not heat, replace the ignitor.

 

Ignition Control

After 45 seconds of hot surface ignitor pre-heat, the

 

 

ignition control will switch 24 VAC to the gas control

 

 

valves. Check for 24 VAC output from ignition

 

 

control, across terminals marked "valve" and "valve

 

 

ground". If no voltage is present, replace ignition

 

 

control.

 

Gas Control Valves

When 24 VAC is supplied to the gas control valve,

 

 

the valve should open. Check for gas pressure at

 

 

the manifold tap located just before the burner. If

 

 

there is no pressure, check the incoming gas supply

 

 

to be sure all manual valves are open and flexible

 

 

gas hose is properly connected. If gas is present

 

 

and coils of gas valve are energized, the gas valve is

 

 

probably defective.

Flame will not stay lit

Hot Surface Ignitor

Six seconds after the gas valve opens, ignition must

 

 

occur. if flame is not detected, the ignition control

 

 

will shut off and lock out. To reset the ignition

 

 

control, turn off the burner switch for 45 seconds,

 

 

then turn on the burner switch to retry ignition. The

 

 

ignition control requires a minimum of 0.8 D.C.

 

 

microamps. To check flame sensing operation,

 

 

connect a digital multimeter (capable of measuring

 

 

D.C. micro-amps) between the "ground" terminal on

 

 

ignition control and the ground lead.

 

 

NOTE: This is a current measurement and the

 

 

meter must be connected in series. If these

 

 

readings are not achieved, replace the hot surface

 

 

ignitor.

 

 

NOTE: The D.C. micro amp test must be conducted

 

 

with the oven in low flame (bypass) operation. Turn

 

 

the temperature control to the lowest setting.

Impinger II –Advantage Service Manual - Domestic

9

 

Power Supply

If there is sufficient micro-amp current, but the flame

 

 

will not stay lit, check for proper polarity of the 120

 

 

VAC power supply.

 

Ignition Control

If there is sufficient micro-amp current, and the 120

 

 

VAC polarity is correct, but the flame will not stay lit,

 

 

replace ignition control.

 

 

NOTE: Check for proper ground connection on

 

NOTE: Flame should be lit at

ignition control.

 

 

 

this time.

 

Low flame is on,

Temperature Control

Check for 120 VAC at terminal #7

but no main flame

 

to neutral on temperature control. If no voltage,

 

 

trace voltage back through centrifugal switch and hi-

 

 

limit. Turn the temperature adjustment knob to

 

 

maximum temperature position and check for 120

 

 

VAC at the load terminal #8 and neutral. If 120 VAC

 

 

is present and unit is not heating, refer to

 

 

"Temperature Solenoid Valve" for next check. If 120

 

 

VAC is not present, proceed.

 

Thermocouple Probe

WITH POWER ON AND THERMOCOUPLE LEADS

 

 

ATTACHED TO THE TEMPERATURE CONTROL

 

 

BOARD: Measure the D.C. millivolt output of these

 

 

leads. Refer to thermocouple chart in Section D for

 

 

proper readings. If these readings are not achieved,

 

 

replace the thermocouple.

 

Temperature Set

Disconnect the potentiometer leads

 

Potentiometer

from the board. Place ohm meter test leads on the

 

 

blue and green pot leads. Reading should be 1 K

 

 

ohms. Place meter leads across the blue and purple

 

 

pot leads and rotate knob from high to low. Repeat

 

 

on green and purple leads. Check for even rise and

 

 

fall of ohms reading to insure that there are no open

 

 

or dead spots in the potentiometer. Check each

 

 

lead to ground for shorts. Replace pot if it does not

 

 

meet the above test.

 

Temperature Solenoid

If 120 VAC is present on the

 

Valve

temperature control board at load terminal #8 to

 

 

neutral, check for voltage at temperature regulation

 

 

valve. If voltage is present, listen for valve to open

 

 

and close. Also check for opens or shorts in the coil.

 

 

Replace as necessary.

Intermittent Heating

Thermal/Overload of Main Fan

The main fan motor and the burner blower motor are

 

and Burner Blower Motors

equipped with internal thermal protection and will

 

 

cease to operate if over heating occurs. As the

 

 

motors overheat and then cool, this will cause the

 

 

units to cycle on and off intermittently. This may be

 

 

caused by improper ventilation or preventive

 

 

maintenance. Also, most of the problems listed

 

 

under "Oven will not heat" can cause intermittent

 

 

failure.

Conveyor will not run

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.

 

10 Amp Fuse

Check and/or replace.

 

Fuseholder

Check and/or replace.

 

Fan Switch

See procedure for checking on Page 10.

10

Impinger II – Advantage Service Manual - Domestic

 

Speed Adjustment

This is a 0 to 10 K ohm, 1 turn potentiometer. With

 

Potentiometer

power off, remove the black and white pot leads

 

 

from the motor control board at terminals P1, P2.

 

 

Place the meter leads on the black lead (P2) and on

 

 

the white lead (P1). Rotating the pot., slowly, from

 

 

low to high, the meter readings should show an even

 

 

transition from 0 to 10 K ohms ± 5%. There should

 

 

be no dead or open spots through out the 1 turn of

 

 

the pot. Check both leads to ground. There should

 

 

be no continuity to ground. If any of the above

 

 

checks fail, replace the pot.

 

DC Motor Control Board

Check for 120 VAC input to the control board at

 

 

terminals L1 and L2. If not present, check wiring

 

 

back to the oven fan switch. If 120 VAC is present

 

 

at L1 and L2, check both fuses on control board (8A

 

 

line and 1A armature), check the VDC output at

 

 

terminals A+ and A-. If 120 VAC is present at

 

 

terminals L1 and L2 and DC voltage is present at

 

 

A+ and A-, but the motor does not run, check gear

 

 

motor as follows:

 

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. Check

 

 

motor brushes. From the top of the motor, rotate

 

 

motor shaft to determine if there is a locked rotor or

 

 

a locked gear box (use care so magnet and H.S.

 

 

board are not damaged). Replace motor as needed.

 

Conveyor

Check for any mechanical misalignment. Also,

 

 

check for worn bearings. A conveyor belt that is

 

 

over tightened will cause excessive bearing wear

 

 

and sometimes, irregular speed.

Conveyor speed varying or

Power Supply

Check power supply at the DC control board for the

intermittent

 

120 VAC at board terminals L1 and L2.

 

Motor Control Board

Place the test meter probes on terminals A+ and A-.

 

 

(With speed potentiometer set to maximum speed

 

 

(Approximately 2 min.) The meter reading should be

 

 

approximately 100 VDC (±3%), if voltage is not

 

 

steady within limits, then the board is probably bad.

 

 

Always check the speed pot., be sure it is okay

 

 

before changing a board. 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.

 

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 11 under "possible cause" listing

 

 

"conveyor gear motor."

 

Magnet

Check to insure that the magnet (cemented to shaft

 

 

of conveyor drive motor) has not been damaged, or

 

 

come loose from motor shaft. Replace as needed.

 

Hall Effect Sensor

Check for any physical damage to hall effect sensor

 

 

(mounted on conveyor drive 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. Connect

 

 

new hall effect to system and check for steady

 

 

operation.

Impinger II –Advantage Service Manual - Domestic

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