Wittco 1000-AD-SS Service Manual

OPERATIONS
MAINTENANCE
MANUAL

COOK & HOLD OVEN SYSTEMS

COMMERCIAL & INSTITUTIONAL SERIES

WITTCO MODEL NUMBERS

750-AD-SS 750-AD-SS-IS

1000-AD-SS
1200-AD-SS
1400-AD-SS 1400-AD-SS-IS

1000-AD-SS-IS
1200-AD-SS-IS

LIMITED WARRANTY

Wittco warrants the Products that it manufactures to be free from defects in materials and workmanship, under normal use and
service, for the periods indicated below from the date of purchase when installed and maintained in accordance with Wittco's written
instructions. Buyer must establish the "Products" purchase date by returning Wittco's Warranty registration Card or by other means
satisfactory to Wittco in its sole discretion.

Wittco warrants its Products to be free from defects in materials and workmanship from the date of purchase (subject to the
foregoing conditions) for the period(s) of time and on the conditions listed below:

a) Ninety (90) days Labor Warranty

b) One (1) Year Parts Warranty

THE FOREGOING WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ANY OTHER WARRANTY, EXPRESSED OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE OR PATENT OR OTHER INTELLECTUAL PROPERTY RIGHT INFRINGEMENT. Without limiting the generality of the

foregoing, SUCH WARRANTIES DO NOT COVER: Coated incandescent light bulbs or heat lamps, all glass components. Product
misuse, tampering, misapplication, application of improper voltage, or recalibration of thermostats or high limit switches.

LIMITATION OF REMEDIES & DAMAGES

Wittco's liability and Buyer's exclusive remedy hereunder will be limited solely, at Wittco's option, to repair or replacement by a
Wittco authorized service agency (other than where Buyer is located outside of the United States or Canada, in which case Wittco's
liability and Buyer's exclusive remedy hereunder will be limited solely to replacement of part under warranty) with respect to any
claim made within the applicable warranty period referred to above. Without limiting the generality of the foregoing, all portable
Products, as defined by Wittco, shall be delivered by Buyer, at its sole expense, to the nearest Wittco authorized service agency for
replacement or repair. Wittco reserves the right to accept or reject any such claim in whole or in part. Wittco will not accept the
return of any Product without prior written approval from Wittco, and all such approved returns shall be made at Buyer's sole
expense. WITTCO WILL NOT BE LIABLE, UNDER ANY CIRCUMSTANCES, FOR CONSEQUENTIAL OR INCIDENTAL

DAMAGES, INCLUDING BUT NOT LIMITED TO LABOR COSTS OR LOST OF PRODUCTS AND LOSS OF PROFITS
RESULTING FROM THE USE OF OR INABILITY TO USE THE PRODUCTS.

WITTCO TECHNICAL & PRODUCT SUPPORT

TECHNICAL SUPPORT & SERVICE INQUIRES MAY BE DIRECTED TO WITTCO BY:

1.

2.

3.

CALLING DIRECTLY TO:

WITTCO FOODSERVICE EQUIPMENT TECHNICAL & SERVICE DEPARTMENT - (800)
367-8413
8:00 AM - 4:30 PM (CENTRAL TIME)

FAXING DIRECTLY TO:

WITTCO FOODSERVICE EQUIPMENT TECHNICAL & SERVICE DEPARTMENT - (414)
354-2821
DAILY 24 HOURS

MAILING DIRECTLY TO:

WITTCO FOODSERVICE EQUIPMENT INC.
7737 NORTH 81 ST. STREET
MILWAUKEE, WISCONSIN 53223
USA

WHEN DIRECTING INQUIRIES TO WITTCO PLEASE HAVE THE FOLLOWING INFORMATION AVAILABLE TO AVOID DELAYS

1. Wittco model number indicated on the equipment serial data plate located at the electrical connection.

2. Wittco serial number indicated on the equipment serial data plate, The equipment serial number will also have
two (2) alpha characters immediately following the serial number. These alpha characters are part of the serial
number.

INTRODUCTION

Wittco Foodservice Equipment's Cook and Hold Oven System is a basic unit of food preparation equipment. It has
found wide acceptance in both institutional and commercial food service operations.

This manual has been produced to provide persons responsible for the operation and maintenance of the oven with a
simple but comprehensive understanding of its proper use. We recommend that this manual be read and understood
prior to placing the oven into operation.

As with any piece of food service equipment, this oven system will require a minimum of care and maintenance.
Suggestions for this procedure are contained in this manual and should become a regular part of the operation of the
unit.

NOTE: BEFORE USING THE OVEN IT SHOULD BE THOROUGHLY CLEANED IN ACCORDANCE
WITH THE INSTRUCTIONS CONTAINED IN THIS MANUAL.

It is recommended that prior to placing the oven system into operation that it be operated on the cook cycle for
approximately two (2) hours at 350° F. to prep it for operation.

Should repair or adjustment of the unit become necessary, we suggest that procedures described in this manual be
followed. The operator may also contact the authorized Wittco dealer who sold the product or an authorized Wittco
service agency. If the needed repair occurs during the warranty period, prior authorization is required from Wittco by
the service company before the work is done.

It is our sincere desire that you obtain the maximum benefit from your Cook and Hold Oven System. If at any time
questions arise or additional information is required, contact Wittco at 800 367-8413.

DESCRIPTION
Operators have found that cooking foods utilizing low temperature methods reduces the amount of product shrinkage

and increases the amount of product yield. This is because less moisture is cooked out of the food when it is prepared
at 225° F. that when it is prepared at 350° F. Because of this fact, the operator will serve a product that has greater
customer satisfaction because of the increased flavor and moisture this meat possesses.

UNCRATING
Each Wittco Foodservice Equipment oven is packed in a cardboard carton which, in turn, is banded to a wooden pallet.

When the cabinet is received by the operator, the carton should immediately be inspected for any sign of visible
exterior damage. If carton is

punctured or dented, it may be an indication that the cabinet has sustained concealed freight damage.

It is very important that any evidence of damage be noted on the Bill of Lading at the time of receipt.

UNPACKING THE CABINET

1. Remove the banding material holding the carton to the pallet.

2. Remove the cardboard carton and the plastic bag covering the cabinet.

3. Carefully lift the cabinet off the carton bottom and pallet and place it on the floor.

4. Open the door and remove any packing materials which may have been used to hold the tray slides in place.
NOTE: The casters for the 1200 AD SS and the 1200 AD SS IS ovens are packed in a separate carton. Remove
them from the carton and install them on the oven.

5. Heat the oven for approximately 2 hours before using.

CABINET LOCATION

PLACING THE OVEN IN THE PROPER LOCATION IS IMPORTANT FOR EFFICIENT OPERATION.
CHOOSE A LOCATION FOR THE OVEN IN AN AREA WHICH WILL PROVIDE EASY LOADING AND
UNLOADING WITHOUT INTERFERING WITH THE FINAL ASSEMBLY OF FOOD ORDERS. PROVIDE
AT LEAST SIX INCHES OF SPACE ON EACH SIDE TO ALLOW FOR PROPER Am CIRCULATION
AROUND THE OVEN.

OPERATING CONTROLS

A complete explanation of the operating controls will be found in the Cook Guide which is supplied with the oven.

All operating controls are located on the front control panel. This panel contains the on/off switch, the electronic
cooking and holding thermostats, the electronic timer and the start button to engage the roast cycle.

NOTE: IT IS RECOMMENDED THAT THE OVEN CONNECTION TO THE POWER SOURCE BE DONE
BY A LICENSED ELECTRICIAN.

NOTE: UPON CONNECTING THE CONTROL MODULE TOP TO THE POWER SOURCE, THE
COOLING FANS MAY NOT OPERATE. THESE FANS WILL ONLY OPERATE WHEN THE
THERMOSTAT TO WHICH THEY ARE CONNECTED REQUIRES IT.

ELECTRICAL REQUIREMENTS

Wittco Cook and Hold Ovens can be factory wired for 120, 208,220, or 240 volts AC, single or three phase, 60 or 50
cycle service.

VERIFY THAT THE VOLTAGE AND PHASE OF THE POWER SOURCE IS IDENTICAL TO THE OVEN
SYSTEM DATA PLATE BEFORE CONNECTING.

The oven must be adequately and safely grounded before operation. A separate disconnect switch or circuit breaker is
recommended at a convenient location between the oven and power source.

TESTING THE OVEN

Each oven is completely checked and tested prior to shipment. However, it is a good practice to completely check the
unit again after unpacking and installation.

1. Connect oven to power source.

2. Turn the oven on and check that the low velocity interior circulating fans are
running. At the same time check that the indicator lights under the on/off switch and the hold thermostat are

illuminated.

3. Set the timer dials to 01.5 (this equals one hour and 30 minutes of cooking time), set the hold thermostat to

140° F, and set the roast thermostat to 225° F.

4. Push the start button which will start the roasting cycle. Verify that the power and the roasting indicator lights

are illuminated.

5. In approximately 15-20 minutes the oven compartment will be at the temperature indicated on the roast

thermostat.

6. The LED digital display will count down in six minute intervals during the roasting cycle until no time

remains on the timer. At that time the oven system will automatically switch to the hold cycle.

If all of the functions perform satisfactorily, the oven is ready for operation.

CLEANING

The interior of the oven should be cleaned whenever a food spill occurs. Use a mild soap and water to clean. Never
use harsh chemicals or abrasive pads to clean the cabinet.
The simple cleaning process follows.

1 DISCONNECT THE OVEN FROM THE POWER SOURCE.

2. Remove the control module top and place it away from the oven cabinet. CLEANING (CON'T)

3. Lift and tip the side tray racks toward the center of the cabinet. Remove them from the cabinet. These racks

should be taken to a sink or dish washer for a thorough cleaning.

4. Remove the interior rear mounted air distribution tunnel and take it to a sink or dish washer for cleaning.

5. Clean the interior oven cavity with soap and water.

6. Reassemble the oven.

REPLACEMENT OF ELECTRICAL COMPONENTS
It is highly recommended that only Wittco Foodservice Equipment replacement parts be used to insure compatibility of

component parts in the operation of cook and hold oven systems. All of the electrical components which may require
servicing are in the control module top.

WARNING: DISCONNECT THE OVEN FROM THE POWER SOURCE BEFORE REMOVING THE
CONTROL MODULE TOP FROM THE OVEN CABINET.

ON/OFF SWITCH REPLACEMENT

1. DISCONNECT THE OVEN FROM THE POWER SOURCE.

2. Remove the protective cover from the control module top.

3 Notice the arrangement of all electrical leads and refer to the wiring diagram for reference. Remove the

defective switch from the control panel.

4. Install the replacement switch and secure it to the control panel. Reconnect the electrical leads to the new

switch.

5. Reinstall the control module cover.

6. Test the oven as described in the TESTING THE OVEN section.

COOK OR HOLD TEMPERATURE CONTROL REPLACEMENT

1. DISCONNECT THE OVEN FROM THE POWER SOURCE.

2. Remove the top cover by removing the retaining screws and lifting it off the control module top to
expose the thermostat.

COOK OR HOLD TEMPERATURE CONTROL REPLACEMENT (CON'T)

3. Notice the arrangement of all electrical leads and refer to the wiring diagram for reference.

4. Disconnect the electrical leads of the temperature control needing replacement from the circuit board.

5. Remove the black knob by loosening the "L-end" screws that holds it to the temperature controller stem.

NOTE: PRIOR TO LOOSENING THE "L-END" SCREWS, TURN THE BLACK TEMPERATURE
CONTROL KNOB COUNTER CLOCK-WISE UNTIL THE KNOB STOPS.

7. Remove the two screws on the front of the control panel that hold the temperature control in place and remove it.

8. Install the replacement temperature control following the reverse of the above procedure.

NOTE: ONCE THE BLACK KNOB HAS BEEN REINSTALLED TURN IT COUNTER CLOCK­WISE UNTIL THE TEMPERATURE CONTROL SHAFT STOPS. LOOSEN THE "L-END"
SCREWS AND REPOSITION THE WHITE ARROW ON THE KNOB TO POINT TO THE SMALL
SILVER DASH UNDER THE LOWEST TEMPERATURE SETTING.

9. Reinstall the control module cover and screws.

10. Test the oven as described in the TESTING THE OVEN section.

INDICATOR LIGHT REPLACEMENT

1. DISCONNECT THE CABINET FROM ITS POWER SOURCE.

2. Remove the top cover by removing the screws and lifting the cover off the control module top to expose the
indicator light.

3. Notice the arrangement and connection of all electrical leads and refer to the wiring diagrams for reference.

4. Disconnect the electrical leads to the indicator light and remove it.

5. Install the replacement indicator light by pushing it into the control panel until the retaining clips snap into place.

INDICATOR LIGHT REPLACEMENT (CON'T)

6. Reconnect the electrical leads to the indicator light.

7. Reinstall the module control top cover and screws.

8. Test the oven as described in the TESTING THE OVEN section.

COOK CYCLE TIMER REPLACEMENT

1 DISCONNECT THE OVEN FROM THE POWER SOURCE.

2. Loosen the two screws on the timer face plate holding the timer in its housing.

3. Carefully pull the timer straight out from the timer housing. (The rubber gasket remains attached to the housing
surface.)

4. Insert the replacement timer into the timer housing.

5. Tighten the two screws holding the timer to the housing.

6. Test the oven as described in the TESTING THE OVEN section.

COOLING FAN REPLACEMENT

1. DISCONNECT THE OVEN FROM THE POWER SOURCE.

2. Remove the top cover by removing the screws and lifting the cover off the control module top to expose the
cooling fans.

3. Notice the arrangement and connection of all electrical leads and refer to the wiring diagrams for reference.

4. Disconnect the electrical leads to the cooling fan and remove it.

5. Install the replacement cooling fan.

NOTE: THE AIR FLOW DIRECTION ARROW MUST POINT TO THE LEFT OR AWAY FROM THE
CONTROL MODULE TOP.

6. Reconnect the electrical leads to the cooling fan.

7. Reinstall the module control top cover and screws.

8. Turn the oven on for approximately 30 minutes at 225° F to see if the cooling fan operates.