Holman PC18 User manual

PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
FOR SERVICE INFORMATION
U.S. AND CANADA CALL: 1-800-807-9054
24 HOURS/DAY 7 DAYS/WEEK
TABLE OF CONTENTS
UNCRATING AND INSPECTION PAGE 1
ASSEMBLY AND INSTALLATION PAGE 1, 2
STACKING INSTRUCTIONS PAGE 3
OPERATION PAGE 4
COOKING PROCEDURES PAGE 4
CLEANING PROCEDURES PAGE 5, 6
TROUBLESHOOTING GUIDE PAGE 6, 7, 8
MAINTENANCE PROCEDURES PAGE 9, 10, 11
PARTS LIST PAGE 12
DRAWINGS
ADJ. HEAT SHIELDS, FRONT VIEW PAGE 2
UNLOAD TRAY PAGE 2
HEAT REFLECTOR/CRUMB TRAYS PAGE 5
REMOVING THE CONVEYOR BELT PAGE 5
BELT SUPPORT SYSTEM PAGE 5
DRIVE SYSTEM PAGE 8
HEATER TUBE INSTALLATION PAGE 9
COMPONENT ARRANGEMENT PAGE 11
WIRING DIAGRAM
CONVEYOR BELT CLEANING PROCEDURES
PAGE 13
PAGE 14
2M-HG0106 REV. 5/4/2005

PAGE 1
PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
UNCRATING AND INSPECTION
Unpack unit and components from container. Remove all visible packing material, inspect unit for damage. If
damage is discovered, file a claim immediately with the carrier that handled the shipment.
The following should be included in the container:
A. 1 ea. Baking oven with heaters with conveyor belt in place. Remove heating element shipping
supports.
B. 1 ea. Stainless Steel Unload Tray and 4 ea. 2 ½ “ Metal Legs.
ASSEMBLY AND INSTALLATION
A. Attach legs by screwing into weld nuts, as shown
B. Anti Skid pads are available at no charge and may be adhered to the foot section of each leg to
prevent sliding. Call the Holman Cooking Equipment Factory Service Team at 1-800-807-9054 for
details.
CAUTION: Use of these pads are not approved by the National Sanitation Foundation.
C. Install unit in its operating position. The load & unload ends must be at least 6" from any vertical
combustible surfaces. Allow sufficient space for operating personnel.
D. Have an electrician connect input power to the unit(s) in accordance with local electrical codes. A
connection terminal block is inside the left side cavity.
ASSEMBLY AND INSTALLATION CONT. ON PAGE 2
INSERT LEG BY SCREWING
INTO WELD NUT ON BOTTOM
OF UNIT.

PAGE 2
PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
ASSEMBLY AND INSTALLATION (CONT)
WARNING: MAKE SURE ALL INPUT POWER IS OFF BEFORE INSTALLING/REMOVING ANY PARTS.
WARNING: BEFORE INSTALLING UNIT(S), CHECK WITH LOCAL POWER COMPANY TO DETERMINE
ACTUAL VOLTAGE AT JOB SITE. NEVER PLUG A 208 VOLT UNIT INTO 240 VOLTS OR A
240 VOLT UNIT INTO 208 VOLTS.
WARNING; BE ABSOLUTELY SURE THE GROUND CONNECTION FOR THE RECEPTACLE IS
PROPERLY WIRED. NEVER CONNECT UNIT TO POWER WITHOUT PROPER GROUND
CONNECTIONS. IMPROPER GROUND MAY RESULT IN SEVERE INJURY OR FATALITY.
E. Before applying input power to the unit(s) check heating elements for breakage, do not apply power to
the unit(s) if a broken tube is found. If no broken tubes are found apply input power by switching the
master on/off toggle switch to the ON position. Turn both heat controls and conveyor belt speed
control to the maximum setting and check all heater tubes and conveyor for proper operation.
F. Allow approximately 5 to 8 minutes for the fan cooling system to come on, check the air intake area as
noted below and be sure that there is a sufficient flow of air into the control box.
G. If all heaters and conveyor system are operating properly, switch the master on/off switch to the OFF
position and allow unit to cool, the fan will continue to circulate cool air through the unit until the
internal temperatures have been decreased.
H. If a problem is discovered during start up procedures, immediately switch the master on/off switch to
the OFF position and notify the Holman Cooking Equipment Factory Service Team at 1-800-807-9054
24 hours 7 days a week, service will be arranged for you.
I. Install unload tray as shown.
AIR INTAKE LOCATED
ON BOTTOM CONTROL
BOX COVER.
ADJUSTABLE HEAT SHUTTER
UPPER POSITION
LOWER POSITION
CRUMB TRAYCRUMB TRAY
UNLOAD TRAY

PAGE 3
PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
ASSEMBLY AND INSTALLATION (CONT.)
F. Stacking Ovens
When stacking two PC18 ovens, a stacking spacer with external air duct must be used to prevent
overheating of the control box in the top oven.
1) If cart is to be used with units, place bottom unit on cart and align leg hole of unit to holes in top
portion of cart. Insert 3/8" bolts through cart and into leg holes to secure bottom unit to cart as
shown below.
2) Place stacking spacer on top of the bottom oven with internal air duct facing up and toward the rear
of the oven.
3) Mount external air duct on stacking spacer as shown below. External air duct must be installed for
cooling system of top unit to function properly.
4) Screw cap screws (4ea.) into leg holes on top oven (see fig. #1 below).
5) Place top oven on stacking spacer. Cap screws will set into cut outs in top of stacking spacer to
lock unit into position. (NOTE) Air intake of top unit must fit over the internal air duct of
stacking spacer to allow airflow into the control box of the top oven.
BOTTOM UNIT
CAN BE COUNTER
MOUNTED OR
PLACED ON A
CART AS SHOWN
MOUNTING BOLTS
FOR BOTTOM UNIT
SCREW INTO LEG
HOLES THOUGH
CART FRAME.
STACKING SPACER (REQUIRE
D
MOUNTS ON TOP
OF BOTTOM OVEN.
EXTERNAL AIR DUCT
MOUNTS ON SPACER.
TOP UNIT- CAP SCREWS
SCREW INTO LEG HOLE.
UNIT SITS ON TOP
OF SPACER.

PAGE 4
PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
OPERATION
A. Switch master on/off switch to the ON position and turn top and bottom heat controls to number 10,
turn conveyor speed control to fastest time setting.
B. Allow 10 to 15 minutes for unit(s) to warm up.
C. Baking in these units is a combination of heat and belt speed. Some foods may require more top heat
or vice versa; other foods may require low top and bottom heat and slow belt speeds. Every product
should, therefore, be tested using the separate top and bottom heat controls and the variable speed
Control to arrive at the correct balance of heat and belt speed. When changing heat and/or belt speed
settings allow approx. 5 minutes for the oven to stabilize itself at the new settings.
COOKING PROCEDURES
THE FOLLOWING SUGGESTED SETTINGS FOR THE VARIOUS PRODUCTS LISTED ARE
INTENDED TO ASSIST THE USER OF THESE OVENS WITH ARRIVING AT THE CORRECT
BALANCE OF HEAT AND SPEED. SOME ADJUSTMENTS MAY STILL HAVE TO BE MADE TO BOTH
HEAT AND SPEED DEPENDING ON THE PRODUCTS FRESHNESS AND/OR THICKNESS AND
DENSITY.
PRODUCT TOP HEAT BOTTOM HEAT BELT SPEED
PIZZA
12" FRESH 350°F 450°F 8 MINUTES
16" FRESH 300°F 450°F 12 MINUTES
12" BLANCHED 300°F 400°F 6 MINUTES
16" BLANCHED 300°F 400°F 8 MINUTES
12" FROZEN 300°F 300°F 8 MINUTES
16" FROZEN 350°F 350°F 12 MINUTES
SANDWICHES
MEAT/CHEESE 450°F 300°F 4 MINUTES
MEATBALL 500°F 350°F 2 MINUTES
BAGEL (OPEN) 500°F 400°F 2 MINUTES
COOKIES
1 TO 1 1/2 Oz 200°F 250°F 12 MINUTES
GARLIC BREAD
LIGHTLY SEASONED 500°F 500°F 2 MINUTES
FISH
SIZZLE PLATTER 400°F 500°F 6 MINUTES

PAGE 5
PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
CLEANING PROCEDURES
Preventive maintenance for your conveyor oven consist of the following recommended cleaning procedures.
To keep your oven in its top operating condition, these steps should be performed daily or weekly as indicated.
NOTE: LUBRICATION OF DRIVE CHAIN WITH A GRAPHITE BASED LUBRICANT IS REQUIRED AS PERIODIC
MAINTENANCE. CALL HOLMAN FACTORY SERVICE DEPARTMENT FOR DETAILS.
WARNING: HIGH VOLTAGES ARE PRESENT IN THESE UNITS. BE SURE ALL INPUT POWER IS OFF
BEFORE SERVICING OR CLEANING UNIT.
A. Remove load and unload trays (daily) as shown.
B. Remove the crumb trays from both load and unload ends of the oven (daily) as shown above, (DO
NOT CLEAN WITH CAUSTIC CLEANERS).
C. For lightly soiled conveyor surfaces a damp cloth or scotch pad can be used without removing the
conveyor belt. (daily)
D. For heavily soiled conveyor surfaces disconnect and remove the conveyor as shown and soak in hot
soapy water overnight (as required).
E. If you have removed the conveyor belt, then remove the conveyor support system as shown above
and clean with a scotch pad (as required).
CLEANING PROCEDURES CONT. PAGE 6
BELT SUPPORT ROD
COUPLER WILL SCREW
ONTO MOUNTING STUD
MOUNTING STUD
CRUMB TRA
Y
CRUMB TRA
Y
UNLOAD TRAY

PAGE 6
PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
CLEANING PROCEDURES CONT.
F. Check air intake area for dust and grease. To clean, remove the control box cover and wipe with a dry
cloth.
G. Re-assemble unit and check to be sure it is operating properly. Call the Holman Cooking Equipment
Factory Service Team at 1-800-807-9054 if the unit is not operating properly.
TROUBLESHOOTING GUIDE
A. UNIT WILL NOT HEAT, CONVEYOR WILL NOT TURN.
1) Be sure main circuit breaker is switched to the ON position and there is power at the outlet.
2) Check to see that the unit is connected to power and Master On/Off is switch to the ON position.
3) Be sure RESET BUTTON is pushed in (see below).
B. UNIT WILL NOT HEAT, CONVEYOR TURNS PROPERLY.
1) Check to see if top and bottom heat controls have been turned to the maximum setting.
2) Press heat limit reset button located on the front section of the control box as shown above. If this
reactivates the heater tubes, see section C below.
3) For further assistance call the Holman Factory Service Team at 1-800-807-9054.
TROUBLESHOOTING GUIDE CONT. ON PAGE 7
HEAT LIMIT SWITCH LOCATED
BENEATH FRONT EXTENSION.
CUTAWAY VIEW OF CONTROL BOX WITHOUT
CONTROL BOX COVER
CONTBOX.DS4
ON FRONT OF CONTROL BOX
CRUMB TRAYCRUMB TRAY

PAGE 7
PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
TROUBLESHOOTING GUIDE CONT.
C. HEAT LIMIT SWITCH
Your conveyor oven is equipped with an automatically activated temperature limit switch which interrupts the
heater tube connections if the air temperature in the control box exceeds 190°F (88°C). This limit switch can be
reset manually by pushing the button in the center of the switch which is located as shown.
THE HEAT LIMIT SWITCH CAN BE ACTIVATED IF THERE IS NOT A PROPER AMOUNT OF AIR FLOW
BEING GENERATED BY THE COOLING FAN. IF THIS OCCURS:
1) DISCONNECT UNIT FROM POWER SOURCE.
2) Check to see if air intake area (openings in bottom center of control box) is free of dust, grease or
other obstructions.
3) Check to see if crumb trays (heat reflectors) are in place.
NEVER OPERATE UNIT WITHOUT CRUMB TRAYS IN POSITION AS THIS CAUSES OVERHEATING IN
THE CONTROL BOX.
TROUBLESHOOTING GUIDE CONT. ON PAGE 8
HEAT LIMIT SWITCH
CRUMB TRA
Y
CRUMB TRA
Y
UNLOAD TRAY

PAGE 8
PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
TROUBLESHOOTING GUIDE CONT.
D. CONVEYOR WILL NOT TURN, UNIT HEATS PROPERLY.
1) DISCONNECT UNIT FROM POWER SOURCE.
2) Check to see if there are obstructions in the conveyor system that may cause a jam.
3) Check power supply for loose or disconnected wires.
4) Remove right side panel and drive motor sprocket, (see below) Manually move conveyor belt to
check for mechanical binding. If conveyor moves freely, call the Holman Cooking Equipment
Factory Service Team at 1-800-807-9054 as drive motor and/or speed control may have to be
replaced.
E. CONVEYOR TURNS AT ONE SPEED REGARDLESS OF SPEED CONTROL SETTING.
1) Call the Holman Factory Service Team at 1-800-807-9054 as conveyor speed control may have to
be replaced. (refer to page 10 for instructions on replacing the speed control).
F. COOLING FAN DOES NOT START.
1) Remove control box cover and check fan blade for obstructions.
2) Contact the Holman Factory Service Team at 1-800-807-9054 as the fan switch and/or fan motor
may have to be replaced.
DRIVE CHAIN
DRIVE SPROCKET
DRIVEN SPROCKET

PAGE 9
PIZZAS OF EIGHT PIZZA SYSTEMS
OPERATOR'S MANUAL
MODEL PC18
MAINTENANCE PROCEDURES
A. REPLACING HEATER TUBES (see below)
1) DISCONNECT UNIT FROM POWER SOURCE.
2) Remove left and right side panels by removing the three truss head screws in each panel. Pull the
top of each panel out slightly and lift up.
3) Disconnect wires from terminal block connections at end of heater tube(s) requiring replacement.
4) Remove heater tube retainer by removing retainer screw with washer (Retainers are located on
power supply side of unit).
5) GENTLY, pull old heater tube out of unit.
6) GENTLY, place new heater tube into unit.
7) Replace heater tube retainers.
8) Reconnect heater wires to terminal block connections.
9) Replace side panels and test unit for proper operation. Call the Holman Cooking Equipment
Factory Service Team at 1-800-807-9054.
B. REPLACING FAN MOTOR
1) DISCONNECT UNIT FROM POWER SOURCE.
2) Remove control box cover with fan motor.
3) Unplug power supply cord from fan motor.
4) Remove(4)screws which hold fan motor and grill to cover.
5) Put replacement motor and grill in place and secure to the control box cover with screws.
6) Reconnect power supply cord to fan motor.
7) Replace control box cover.
MAINTENANCE PROCEDURES CONT. PAGE 10
HEATER
TUBE RETAINERS
HEATER TUBE
SIDE PANEL
FAN MOTOR
SECURED BY 4 SCREWS
AIR INTAKE
CONTROL BOX COVER