Vulcan-Hart VC4EC Bedienungsanleitung

A product of VULCAN-HART LOUISVILLE, KY 40201-0696

F25105 (Rev. A, October 2007)

- NOTICE -

This Manual is prepared for the use of trained Vulcan Service

Technicians and should not be used by those not properly qualified.

If you have attended a Vulcan Service School for this product, you

may be qualified to perform all the procedures described in this

manual.

This manual is not intended to be all encompassing. If you have not

attended a Vulcan Service School for this product, you should read,

in its entirety, the repair procedure you wish to perform to

determine if you have the necessary tools, instruments and skills

required to perform the procedure. Procedures for which you do not

have the necessary tools, instruments and skills should be

performed by a trained Vulcan Service Technician.

Reproduction or other use of this Manual, without the express

written consent of Vulcan, is prohibited.

VC4ED SHOWN

SERVICE MANUAL

VC4E & VC6E

SERIES

FULL SIZE

ELECTRIC CONVECTION

OVENS

MODEL ML

VC4ES 126743

VC4ED 126744

VC4EC 126745

VC6ES 126746

VC6ED 126747

VC6EC 126748

FULL SIZE ELECTRIC CONVECTION OVENS

F25105 (Rev. A, October 2007) Page 2 of 60

TABLE OF CONTENTS

GENERAL ................................................................................ 4

Introduction ............................................................................ 4

Installation ............................................................................ 4

Operation ............................................................................. 4

Cleaning .............................................................................. 4

Lubrication ............................................................................ 4

Tools................................................................................. 4

Specifications .......................................................................... 5

REMOVALANDREPLACEMENTOFPARTS .................................................... 6

Covers and Panels ...................................................................... 6

Control Panel Components ............................................................... 7

Component Panel Components ............................................................ 8

Temperature Probe (Solid State Control) ..................................................... 8

HeatingElements ....................................................................... 9

Blower and Motor ...................................................................... 10

DoorSwitch .......................................................................... 11

Door Window ......................................................................... 12

Oven Doors and Bearings (Independent Doors) .............................................. 12

Oven Doors (Simultaneous Doors) ......................................................... 13

RollerLatchAssembly .................................................................. 14

Door Catch Roller Assembly (Independent Doors) ............................................ 14

Mechanical (KX) Thermostat ............................................................. 15

HighLimitThermostat .................................................................. 15

InteriorLights ......................................................................... 16

CoolingFan .......................................................................... 16

SERVICEPROCEDURESANDADJUSTMENTS................................................. 17

SolidStateTemperatureControlCalibration ................................................. 17

Mechanical (KX) Thermostat Calibration .................................................... 18

SolidStateTemperatureControlTest ...................................................... 19

Temperature Probe Test (Solid State Control) ................................................ 20

HeatingElementTest ................................................................... 20

BlowerAdjustment ..................................................................... 21

DoorAdjustment....................................................................... 22

Door Strike Adjustment (Independent Doors) ................................................. 22

Door Catch Roller Adjustment (Independent Doors) ........................................... 23

DoorSwitchAdjustment ................................................................. 24

Door Chain Adjustment (Simultaneous Doors) ................................................ 24

ComputerControl ...................................................................... 25

ComputerControlTemperatureCalibration .................................................. 26

FULL SIZE ELECTRIC CONVECTION OVENS

F25105 (Rev. A, October 2007)Page 3 of 60

Computer Control Operational Test ........................................................ 27

ELECTRICALOPERATION .................................................................. 29

Component Function ................................................................... 29

Component Location ................................................................... 30

Sequence of Operation .................................................................. 34

VC4ES, VC6ES with Mechanical KX Thermostat.......................................... 34

VC4ED,VC6EDwithSolidStateTemperatureControl ..................................... 34

TimerCycle,Cooking(KXThermostatorSolidStateControl)................................ 34

CoolDownCycle(KXThermostatorSolidStateControl) ................................... 35

VC4EC,VC6EC(ComputerControl) ................................................... 35

Temperature and Time Cycle (Cooking) ............................................. 36

Cook and Hold Cycle ........................................................... 36

CoolDownCycle .............................................................. 36

Schematics ........................................................................... 37

VC4ES, VC6ES with Mechanical (KX) Controls, 208-240V .................................. 37

VC4ES, VC6ES with Mechanical (KX) Controls, 480V ..................................... 38

VC4ED, VC6ED with Solid State Temperature Control, 208-240V ............................ 39

VC4ED, VC6ED with Solid State Temperature Control, 480V ................................ 40

VC4EC, VC6EC Computer Control, 208-240V (Roast & Hold Standard) ........................ 41

VC4EC, VC6EC Computer Control, 480V (Roast & Hold Standard) ........................... 42

WiringDiagrams ....................................................................... 44

VC4ES, VC6ES with Mechanical (KX) Control, 208-240V ................................... 44

VC4ES, VC6ES with Mechanical (KX) Control, 480V ...................................... 46

VC4ED, VC6ED with Solid State Temperature Control, 208-240V ............................ 48

VC4ED, VC6ED with Solid State Temperature Control, 480V ................................ 50

VC4EC, VC6EC Computer Control, 208-240V (Roast & Hold Standard) ........................ 52

VC4EC, VC6EC Computer Control, 480V (Roast & Hold Standard) ........................... 54

TROUBLESHOOTING ...................................................................... 56

All Models ............................................................................ 56

Computer Control Models Only ........................................................... 57

FULL SIZE ELECTRIC CONVECTION OVEN - GENERAL

F25105 (Rev. A, October 2007) Page 4 of 60

GENERAL

INTRODUCTION

Procedures in this manual will apply to all models unless specified. Pictures and illustrations can be of any model

unless the picture or illustration needs to be model specific.

Models

MODEL

FEATURES OPTIONS

CAVITY

DEPTH

TEMPERATURE

CONTROL

DOORS

(50/50)

COOK

TIMER

COOK

TIMER

COOK &

HOLD

VC4ES 426.5" Mechanical (KX) Independent 1, 2 1-Hour Dial 5-Hour Dial N/A

VC4ED 26.5" Solid State Independent 1, 3 1-Hour Dial 5-Hour Dial N/A

VC4EC 26.5" Computer Independent 1, 3 24-Hour Digital Built in Built in

VC6ES 430.5" Mechanical (KX) Independent 1, 2 1-Hour Dial 5-Hour Dial N/A

VC6ED 30.5" Solid State Independent 1, 3 1-Hour Dial 5-Hour Dial N/A

VC6EC 30.5" Computer Independent 1, 3 24-Hour Digital Built in Built in

NOTES:1. Simultaneous doors are optional (with or w/o window).

2. Stainless steel doors w/o window (standard).

3. Stainless steel doors with window (standard)

4. In February 2001, this model was discontinued.

INSTALLATION

Refer to the Instructions Manual for detailed

installation instructions on single or stacked ovens.

OPERATION

Refer to the Instructions Manual for specific

operating instructions.

CLEANING

Refer to the Instructions Manual for specific cleaning

instructions.

LUBRICATION

!Cavity blower motor has sealed bearings and

requires no additional lubrication.

!Huskey’s TF1000 grease or equivalent high

temperature Teflon grease.

TOOLS

Standard

!Standard set of hand tools

!VOM with A.C. current tester (Any quality VOM

with a sensitivity of at least 20,000 ohms per volt

can be used)

!Gear Puller to remove blower

!Temperature tester (thermocouple type)

Special

!Manometer

!Clamp on amp meter

!Spring force gauge, pull type with a minimum 30

pound full scale range (purchase locally)

!RTV sealant, 736 DOW silicone high temp (P/N

542133) or equivalent

FULL SIZE ELECTRIC CONVECTION OVEN - GENERAL

F25105 (Rev. A, October 2007)Page 5 of 60

SPECIFICATIONS

Electrical

MODEL

TOTAL

POWER

(KW)

AMPERAGE - 3 PHASE/ 60HZ

PER LINE 1

RECOMMENDED

CIRCUIT

PROTECTION 2

208V 240V 480V 208V 240V 480V

VC4ES

VC4ED

VC4EC

VC6ES

VC6ED

VC6EC

12.5 353315454020

NOTES: 1. Amperage values in the table are nominal. Tolerance

is +5/-10%.

2. Complied in accordance with National Electric Code,

ANSI/NFPA 70, latest edition.

MODEL

TOTAL

POWER

(KW)

AMPERAGE - 1 PHASE/ 60HZ

PER LINE 1

RECOMMENDED

CIRCUIT

PROTECTION 2

208V 240V 480V 208V 240V 480V

VC4ES

VC4ED

VC4EC

VC6ES

VC6ED

VC6EC

12.5 605226807035

NOTES: 1. Amperage values in the table are nominal. Tolerance

is +5/-10%.

2. Complied in accordance with National Electric Code,

ANSI/NFPA 70, latest edition.

FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS

F25105 (Rev. A, October 2007) Page 6 of 60

REMOVAL AND REPLACEMENT OF PARTS

COVERS AND PANELS

Top Front Cover

1. The top front cover is secured with four (4)

screws, two on each side of cover. Remove

these screws then remove the cover from the

oven.

2. Reverse the procedure to install.

Bottom Front Cover

1. The bottom front cover is secured with four (4)

screws, two on each side of cover. Remove

these screws then remove the cover from the

oven.

2. Reverse the procedure to install.

Control Panel

1. Remove three (3) screws on the right side

which secure the control panel then pull the

panel away from the oven.

NOTE: If the oven has a mechanical (KX type)

thermostat, it must be removed from the control

panel first, before removing the control panel.

2. Disconnect the temperature probe leads from

the solid state temperature control.

3. Unplug the wire harness connector to the

control panel components.

4. Reverse the procedure to install.

Right Side Panel

1. Remove the two screws near front of oven,

which secure the bottom front cover and control

panel.

2. Remove the remaining seven screws securing

the right side panel.

3. Pull the right side panel out at the bottom then

down to remove.

4. Reverse the procedure to install.

FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS

F25105 (Rev. A, October 2007)Page 7 of 60

Left Side Panel

1. Remove the screws which secure the left side

of the top front cover, bottom front cover and

control panel.

2. Remove the seven screws securing the left side

panel.

3. Pull the left side panel out at the bottom then

down to remove.

4. Reverse the procedure to install.

CONTROL PANEL

COMPONENTS

Removable Components

1. Remove the control panel as outlined under

COVERS AND PANELS.

2. Remove the component being replaced.

3. Reverse the procedure to install the

replacement component, then check oven for

proper operation.

FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS

F25105 (Rev. A, October 2007) Page 8 of 60

COMPONENT PANEL

COMPONENTS

Removable Components

1. Remove the right side panel as outlined under

COVERS AND PANELS.

NOTE: If right side panel is not accessible, this

component can be serviced by removing the control

panel as outlined under COVERS AND PANELS.

2. Disconnect the wire leads to the component

being replaced.

3. Remove the component.

4. Reverse the procedure to install the

replacement component and check oven for

proper operation.

TEMPERATURE PROBE

(SOLID STATE CONTROL)

1. Remove the right side panel as outlined under

COVERS AND PANELS.

NOTE: If right side panel is not accessible, this

component can be serviced by removing the control

panel as outlined under COVERS AND PANELS.

2. Disconnect the probe leads from the solid state

temperature control.

3. Remove the racks and right rack support.

4. Remove the probe guard or mounting clips.

FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS

F25105 (Rev. A, October 2007)Page 9 of 60

5. Remove probe by pushing it through the oven

wall and into the control panel area.

NOTE: The hole in the oven cavity wall does not line

up straight with the oven cavity outer shell, therefore

the probe must be removed at an angle.

6. Reverse the procedure to install the

replacement probe.

7. Adjust the temperature control as outlined under

SOLID STATE TEMPERATURE CONTROL

CALIBRATION in SERVICE PROCEDURES

AND ADJUSTMENTS.

HEATING ELEMENTS

NOTE: Starting with production in October, 2001, the

top cavity panel will have 3/4" square holes for easier

element removal. Ovens manufactured prior to this

date have 1/2" round holes that sometimes make it

difficult to remove elements thru the cavity. A serial

number cut off will not be available. Follow the

procedures for element removal as outlined below.

Front Access

1. Remove the oven racks and rack supports.

2. Remove the "top" door seal from the oven.

3. Determine if the heating element to replace is

on the left or right side in the oven cavity. The

element locations from front to back are: Right

side - R1, R2 & R3; Left side - R4, R5 & R6.

A. Measure the current draw of the heating

elements as outlined under HEATING

ELEMENT TEST in SERVICE

PROCEDURES AND ADJUSTMENTS.

4. From inside the oven cavity, remove the

perforated panel from the same side of the

element being replaced.

A. If removing the right side panel, also

remove the probe guard or mounting clips.

B. Run the probe wire thru the panel opening

before lifting panel out.

5. From the element being replaced, remove the

hold down clamps, the mounting bracket screws

at the top, then remove the element.

FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS

F25105 (Rev. A, October 2007) Page 10 of 60

LEFT SIDE ELEMENTS SHOWN

NOTE: The mounting bracket is sealed with RTV

which may still hold the element after the screws are

removed. Also, in some cases, the ring terminal

connected to the element may interfere with easy

removal. If access to the left side panel and/or the

top panel is available, see ALTERNATE ACCESS.

6. Disconnect the lead wires from the element.

7. Clean RTV residue from the mating surface

inside the oven, apply new high temperature

RTV to the heating element mounting bracket

and reverse procedure to install.

8. Check for proper operation.

Alternate Access

If the heating element is not removing easily from

inside the oven cavity, and access to the left side

panel and/or the top panel is available, this alternate

removal method may be used.

NOTE: On stacked ovens, if the bottom oven is

being serviced and the heating element to replace is

on the right side, the ovens must be unstacked to

access the heating element terminals through the

top. Once unstacked, follow the removal procedure

below.

1. Perform steps 1 thru 4 under FRONT ACCESS.

2. If the element is on the left side:

A. Remove the left side panel and pull back

the insulation at the top to expose the

element terminals.

B. Remove the lead wires from the element

being replaced. Proceed to step 4.

3. If the element is on the right side:

A. Remove the top panel and pull back the

insulation to expose the element terminals.

B. Remove the lead wires from the element

being replaced.

4. From the same element, remove the two

clamps holding the element vertical, the screw's

securing mounting bracket at the top, and then

remove the element.

NOTE: The mounting bracket is sealed with RTV

which may still hold the element after the screws are

removed.

5. Clean RTV residue from the mating surface

inside the oven, apply new high temperature

RTV to the heating element mounting bracket

and reverse procedure to install.

6. Check for proper operation.

BLOWER AND MOTOR

1. Take out the racks and rack supports.

2. Remove screws securing baffle panel and

remove the panel.

3. If replacing:

A. Blower Only - Loosen set screws on blower

hub and using a bearing puller, remove

blower from motor shaft.

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