Wisco Industries 421 User manual

This is not your typical pizza oven. With one simple push, your digital LED display is automatically set
for 10 minutes at 450 °F. Need more or less time? Not a problem! Our new rotary dial design allows you
to easily set it at what you need with just a turn of the dial. Did we mention it does more than just
pizza? Get creative! You’ll be amazed at what you can make in this oven.
DELUXE PIZZA
MULTI-PURPOSE OVEN
FP140166 REV: B
P.O. Box 10 • Oregon, WI 53575 • Ph: 608.835.3106 • Fx: 608.835.7399 • wiscoind.com • wiscomade.com
FEATURES: ELECTRICAL DATA:
VOLTS: 120 AMPS: 12.5 WATTS: 1500
DIMENSIONS:
SHIPPING INFORMATION:
• Best when operated on an individual branch circuit
• 6’ power cord length
• Outside: 18”W × 15”D × 7-3/4”H
• Grill/Rack: 13”W × 13”D
• : SHIPPING DIMENSIONS W × 18” 21”D × 9”H
• : 21 lbs.SHIPPING WEIGHT
• Opening: 3” x 13”
• Removable clean out tray
• LED Display
• Adjustable thermostat 150°F–500°F in 25°F
increments
• 30-minute digital display timer
• Quick one-touch setting of 450°F for 10 minutes
• Long life calrod heating elements
• Attractive stainless steel outer housing
• Flip up handle design for easier storage
• “Formed” tray to prevent food products from
sliding o ffback tray
MODEL 421
ADDITIONAL ACCESSORIES AVAILABLE:
• Cookie Pan (#0016555)
• Cooling Rack (#00616CR)
• Parchment Paper: 500 Sheets (#018167-1)
1000 Sheets (#0018167-2)

P.O. Box 10 • Oregon, WI 53575 • Ph: 608.835.3106 • Fx: 608.835.7399 • wiscoind.com • wiscomade.com
IMPORTANT: Read the following safety and operation instructions to avoid injury and to avoid damage to equipment or property.
Plug unit into a properly grounded electrical outlet of the correct voltage, size, and plug configuration 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 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 “flip-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 grill 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.
Unplug unit from power source, and allow to cool completely before performing any maintenance or cleaning.
These ovens are designed with a clean-out tray which should be pulled out and cleaned often with warm
soapy water and then dried thoroughly. Most of the spillage will fall directly on this tray, and if this is
cleaned off and not allowed to build up, the internal parts of the oven will stay relatively clean.
Additionally, proper cleaning prevents emergence of smoke caused by a build up of carbon. The outside of
the oven may be cleaned with a soft rag and stainless steel cleaner. As with all metals, there could be some
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.
CLEANING INSTRUCTIONS
OPERATION:
Included with your oven is a plastic bag containing the grill handle, clean-out tray knob and appropriate
screws and nuts. See the instruction sheet for assembling the flip up handle and clean-out tray.
OPERATION:
ASSEMBLING COMPONENT PARTS

P.O. Box 10 • Oregon, WI 53575 • Ph: 608.835.3106 • Fx: 608.835.7399 • wiscoind.com • wiscomade.com
OPERATION:
Turning the Oven ON
- Push the control knob to turn the oven on. The prompting buzzer 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 flashing, 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 flash 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.
Turning the Oven OFF
- If the control knob is pushed during the cooking cycle, the oven will shut off.
- The oven’s display will flash for the last 15 seconds of the cooking cycle, then the prompting buzzer will beep
five 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 readout 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 readout when the temperature sensor circuit is shorted; a
replacement temperature sensor may be needed to correct this.

1Slide the Grill Front over the Grill Loop allowing it to lay flat
2Place the Handle Bracket over the Grill Loop
3Rotate the Grill Front and Handle upright
4Insert the Screw through the Grill Loop,
the Handle Bracket, and the Grill Front
5Thread and tighten the Thumb Nut onto the Screw
If your grill differs in size or shape, the assembly process will remain the same.
Pizza Oven Handle Assembly Instructions
FS140096 REV: ORIG

CN4 NTC
CN2 FAN
HEAT 2
HEAT 1
CN1
CN2
ACN
ACL

P.O. Box 10 • Oregon, WI 53575 • Ph: 608.835.3106 • Fx: 608.835.7399 • wiscoind.com • wiscomade.com
PARTS LIST:
MODEL 421
ITEM # PART # DESCRIPTION
1 0022901 CONTROL BOARD
I013746 CONTROL BOARD DECAL
3 0022903 CONTROL KNOB HOUSING
4 0022905 CONTROL KNOB
5 RA441N CLEAN OUT TRAY
6 0023019 BAG OF PARTS (Incl. handle, nut, screw & clean out tray knob & screw)
7 0019113N GRILL FRONT PANEL
8 Wa114 GRILL
9 0022938 POWER CORD
10 00410 WIRE NUT
11 008248 STRAIN RELIEF
12 0023054SK SIDE FOOT SERVICE KIT
13 0023055SK REAR FOOT SERVICE KIT
14 0022921 TEMPERATURE SENSOR
15 0023033 HI-LIMIT THERMOSTAT
16 0023020SK COOLING FAN
17 0022935 UPPER HEATING ELEMENT 900W
18 0022927 POWER BOARD
19 0022936 LOWER HEATING ELEMENT 600W
20 0023057SK BOTTOM FOOT SERVICE KIT
21 RA423N BOTTOM PAN ASSEMBLY WITH FEET
2