Wisco 421 Service Manual

INDEX

Features .................................................................................................................1

Electrical Data ....................................................................................................... 1

Dimensions ............................................................................................................ 1

Additional Accessories .......................................................................................... 1

Cleaning Instructions ............................................................................................. 2

Operating Instructions ........................................................................................... 2

Warranty Information ............................................................................................. 3

Contact Information .............................................................................................. 3

Exploded View ....................................................................................................... 4

Wiring Diagram ...................................................................................................... 6

Parts List ............................................................................................................... 8

Handle Assembly Instructions ............................................................................... 9

Miscellaneous Baking Information ...................................................................... 11

Recipes ................................................................................................................ 12

MULTI-PURPOSE OVEN

FEATURES:

• Opening: 3" x 13"

• Removable cleanout tray

• LED Display

• Adjustable thermostat 150°F–500°F in 25°F increments

• 30-minute digital display timer

• Quick one-touch setting with temperature memory

• Long-life calrod heating elements

• Flip-up handle design for easier storage

ELECTRICAL DATA:

• 120 volts, 12.5 amps, 1500 watts

• Best when operated on an individual
branch circuit

• 6' power cord

DIMENSIONS:

• 7¾"H x 18"W x 15"D

• Inside dimension: 13" x 13" x 3"

SHIPPING WEIGHT:

ADDITIONAL ACCESSORIES AVAILABLE:

Approximately 20 lbs.

• Cookie pan (#0018024)

• Cooling rack (#00616CR)

• Parchment paper: 500 sheets (#0018167-1)
1000 sheets (#0018167-2)

IMPORTANT: Read the following safety and operating instructions to avoid injury and/or

damage to equipment and property.

Plug unit into a properly grounded electrical outlet of the correct voltage, size and plug
conguration for this unit. We recommend usage on an individual branch circuit of at
least 15 amps for best results. Failure to do so may result in decreased performance of
the pizza oven.

The oven should never be operated on or near combustible materials. Caution should
be taken because of the hot surfaces attained during use. We recommend a 6"
spacing from walls.

Exterior surfaces on unit may get hot. Use caution when touching these areas to avoid injury.

Improper assembly of the “ip-up” handle to the grill could cause the grill to rotate. This may
result in food falling off the grill. Injury to the individual could occur if attempting to catch
falling food. See proper handle assembly instructions included in this instruction manual.

When removing from oven, use caution to avoid hot food falling into the oven, on the
operator, etc.

Unplug oven when not in use.

Unit is not waterproof. DO NOT submerge in water. DO NOT operate if unit has been
submerged in water.

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ASSEMBLING COMPONENT PARTS

Included with your oven is a plastic bag containing the grill handle, screw, and a thumb nut. See
instructions for assembling the ip-up handle on page 9.

CLEANING INSTRUCTIONS

Unplug oven, and allow to cool before cleaning. This oven is designed with a cleanout tray which
should be removed and cleaned often with warm, soapy water and dried thoroughly. Most of the
spillage will fall directly onto this tray. If spillage is not allowed to accumulate, the internal parts of
the oven will stay relatively clean. Usage of aluminum foil or parchment paper in the cleanout tray
is recommended to aid in keeping the oven clean. Change the aluminum foil or parchment paper
often. Proper cleaning eliminates smoking caused by carbon buildup. The outside of the oven may
be cleaned with a soft cloth and stainless steel cleaner. As with all metals, there may be sharp
edges, and caution should be used when cleaning.

DO NOT USE ANY OVEN/RANGE CLEANERS ON THIS UNIT.

AVOID USING ABRASIVE SCOURING PADS AS SOME MAY CAUSE SCRATCH MARKS ON UNIT.

OPERATING INSTRUCTIONS:

Turning the Oven ON

• Push the control knob to turn the oven on. The prompting buzzer will
make a sound.

Quick One-touch Setting with Temperature Memory

• The oven will automatically start at the last used temperature setting
for 10 minutes if the control knob is not turned or pushed within 5
seconds. If the unit has been unplugged, the default is 450˚F. Time is
not saved in memory and will always default to 10 minutes.

Selecting Bake Time

• With the baking time ashing, turn the control knob clockwise to
increase the baking time and counterclockwise to decrease the
baking time. The maximum baking time is 30 minutes. If a longer
time is needed, turn the control knob clockwise again before original
set time is done.

• Once the desired baking time is displayed, push the control knob
once to display the baking temperature.

Selecting Baking Temperature

• Turn the control knob clockwise to increase the baking temperature and counterclockwise to
decrease the baking temperature. The temperature can be regulated in 25˚F increments. The
minimum baking temperature is 150˚F, and the maximum is 500˚F.

NOTE:

• After the baking temperature is selected, the oven will automatically start if the control knob is
not turned within 5 seconds.

• The baking temperature cannot be changed once the oven has started.

• The oven's TEMP light will ash until it has reached the desired pre-heat temperature.

Adding/Subtracting Baking Time

• Time can be added or subtracted while the oven is operating.

• Turn the control knob clockwise to increase the baking time and counterclockwise to decrease
the baking time.

Turning the Oven OFF

• If the control knob is pushed during the cooking cycle, the oven will shut off.

• The oven’s display will ash for the last 15 seconds of the cooking cycle, then the prompting
buzzer will beep ve times and shut off. The cooling fan will remain running for several minutes.

Error Codes

If the digital readout should display either of the following error codes, please give us a call.

• The code E1 will appear on the LED display when there is an open circuit in the temperature

sensor circuit; a replacement temperature sensor may be needed to correct this.

• The code E2 will appear on the LED display when the temperature sensor circuit is shorted; a

replacement temperature sensor may be needed to correct this.

2

LIMITED WARRANTY / RETURN POLICY 1 YEAR REPLACEMENT/EXCHANGE

Wisco Industries, Inc. warrants its equipment against defects in materials and workmanship subject to the
following conditions:

Should any product fail to function in its intended manner under normal use within the limits dened in this
warranty, Wisco Industries will determine if the item is to be repaired or replaced by Wisco Industries. Failure to
follow authorizing instructions may void any claim and/or warranty.

• Contact Wisco Industries for repair/replacement by calling [phone] or toll free [phone]. You can

also email us at: [e-mail]

• An authorizing RMA number must be obtained through Wisco Industries BEFORE any warranty issues can

be resolved. Failure to do so in advance may void the warranty/claim resulting in Wisco Industries not being
responsible for any incurred expenses and/or charges.

• At time of call, Wisco Industries will assist you in:

- getting your unit replaced/exchanged

- and/or obtaining repair parts

- and/or authorizing a service agent

This warranty covers products shipped to the 48 contiguous Unites States, Hawaii, and metropolitan areas of
Alaska and Canada only. Warranty for international or areas not listed above will consist of replacement of parts
only. There will be no labor coverage, and parts must be shipped to an address within the 48 contiguous United
States, Hawaii, and metropolitan areas of Alaska and Canada only.

Time Period

One year from date of shipment from our manufacturing facility. Parts replaced under this warranty are warranted
for the unexpired portion of the original product warranty only.

Exclusions

The following conditions are not covered by warranty:

• Equipment failure relating to improper installation and improper utility connection or supply.

• Equipment that has not been properly maintained or damage from improper cleaning and/or water damage to

controls.

• Equipment that has not been used for its intended purpose or has been subject to misuse or misapplication,

neglect, abuse, accident, alteration, negligence, damage during subsequent transit, delivery or installation, re,
ood, riot, or act of god.

• Equipment that has the model number or serial number removed or altered.

WISCO INDUSTRIES, INC. DISCLAIMS AND EXCLUDES ANY AND ALL OTHER EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, ANY AND ALL WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE.

Buyer agrees that its SOLE AND EXCLUSIVE REMEDY against Wisco and Wisco’s SOLE AND EXCLUSIVE
LIABILITY arising out of any defect or nonconformity in the product shall be replacement/exchange of such
nonconforming countertop food service equipment at Wisco’s expense. No countertop food service equipment
shall be returned without Wisco’s consent. IT IS AGREED THAT WISCO’S MAXIMUM LIABILITY SHALL NOT IN
ANY CASE EXCEED THE SALE PRICE FOR THE COUNTERTOP EQUIPMENT CLAIMED TO BE DEFECTIVE OR
NONCONFORMING.

Without limiting the generality of the foregoing, SUCH WARRANTIES DO NOT COVER: Glass, plastic enclosures/
panels, door assemblies, light bulbs, and wire pizza oven heating elements.

SHIPPING DAMAGE

If the outside packaging of your order is visibly dented, crushed, torn, or otherwise signicantly damaged, or if
you move the carton and you hear broken glass, please reject the shipment while driver is still with you if possible.
Please call us at [phone] or email [e-mail] to notify us of the issue. We will conrm the
damage with the carrier and reship your order immediately.

RETURN POLICY

You may return any unused, undamaged items within 30 days of receipt. We will issue a refund in the form of your
original payment less a 20% restock fee. All returns must be received in resalable condition. Wisco Industries will
not accept a return with shipping damage. Wisco Industries will not reimburse any shipping and handling fees.

If you would like to return an item, please call us at [phone] or toll free at [phone]. Ask for our Food
Service Equipment Division. You may also email us at: [e-mail]. You will be given an RMA number
and return instructions. We cannot accept returns without an RMA number. Please be sure to include a copy of
the packing list with the return.

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Model 421

Exploded View

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MODEL 421 EXPLODED VIEW

7

11

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9

8

6

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4

4

15

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16

14

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18

19

21

20

1

3

2

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MODEL 421 WIRING DIAGRAM

Model 421

Wiring Diagram

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11

16

14

15

CN2 FAN

CN2

1

CONTROL BOARD POWER BOARD

CN4 NTC

HEAT 2

CN1

HEAT 1

18

ACL

ACN

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