Instruction/ maintenance manual of the product PS360/PS360WB Middleby Marshall
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PS360L/PS360WB-L Tandem PS360/PS360WB Double Tandem PS360U/PS360WB-U Tri Tandem PS360U/PS360WB-U Quad Tandem owner's operating & installation manual SERIES PS360/360WB T ANDEM GAS OVEN MODELS A MIDDLEBY COMPANY © 1998 Middleby Marshall Inc. Part No.
NOTICE: This Operating and Installation Manual should be given to the user. The operator of the oven should be familiar with the functions and operation of the oven.
Middleby Marshall Inc. 1400 Toastmaster Drive Elgin, IL 60120 USA (847) 741-3300 FAX (847) 741-4406 Middleby Corporation 24-hour Service Hotline 1-800-238-8444 www .middleby .com MIDDLEBY MARSHALL INC. OVEN LIMITED WARRANTY (Non U.
iii NOTE Wiring Diagrams Are Contained In This Manual And Are Also Located Inside The Control Box Door. T ABLE OF CONTENTS page SECTION 1 - DESCRIPTION OVEN SPECIFICATION CHARTS ............................ 1- 1 CHART OF ORIFICE SIZES, GAS PRESSURES, NOMINAL INPUT RATINGS & GAS FLOW .
TABLE OF CONTENTS SECTION 4 - MAINTENANCE I . MAINTENANCE - DAILY ..................................... 4- 1 A . Exterior ........................................................ 4- 1 B. Fans and Grills ........................................... 4- 1 C.
NOTES: v.
1-1 SECTION 1 DESCRIPTION OVEN INFORMATION (per oven section) PS360 PS360WB Weight, Single Oven 1350 lbs. (612kg) 1400 lbs. (634kg) Shipping Weight, Single Oven 1675 lbs. (760 kg) 1750 lbs. (780kg) Shipping Cube, Single Oven Approx. 104.5 ft 3 (3.0 m 3 ) Approx.
1-2 SECTION 1 DESCRIPTION 1 2 4 3 4 3 2 3 I. PRINCIPLE OF AIR FLOW Air is heated in the heating chamber (1), then pulled into the impellers or blowers (2), which push the air into the oven plenum and delivers the heated air into the air fingers (3).
1-3 SECTION 1 DESCRIPTION Figure 1-4. Air Fingers Showing Air Passing Through Inner Plate And Outer Plate Which Forms High Velocity Columns Of Air To Product. Inner Plate Outer Plate Inner Plate Air Flow From Plenum Chamber Air Flow From Plenum Chamber High Velocity Columns of Air to Product Outer Plate A.
1-4 SECTION 1 DESCRIPTION B. Air Fingers The Middleby Marshall ovens are heavy duty conveyorized hot air ovens employing vertical air streams (Figure 1-3 and 1-4) to give uniform and intensive heating.
1-5 SECTION 1 DESCRIPTION II. COMPONENT FUNCTION The components for the lower and upper ovens are identical. The following description covers the lower oven. A. Conveyor The conveyor is driven by a direct current electric motor operating through a gear reducer, (See Figure 1-6).
1-6 SECTION 1 DESCRIPTION D. Cooling Fans -- See Figure 1-7 There are two cooling fans located in the back of each oven. These fans blow cool air in through the machinery compartment, across the blower motors, and out the rear of the top cover, or out the front bottom of the lower oven.
1-7 SECTION 1 DESCRIPTION F. Air Fingers The Air Finger Assemblies are made up of three parts as follows (See Figure 1-8): 1. Outer Plate- The Outer Plate is the removable covering with tapered holes, which directs the air stream onto the product to be baked.
1-8 SECTION 1 DESCRIPTION NOTES:.
2-1 SECTION 2 INSTALLATION WARNING Do not obstruct the flow of combustion and ventilation air to and from your oven. There must be no obstructions around or underneath the oven. I. UNLOADING/UNPACKING Your Middleby Marshall Ovens are shipped partially assembled.
2-2 SECTION 2 INSTALLATION 2" 51mm Minimum 18" 458mm 18" 458mm 12" 305mm 3” 76mm II . INSTALLATION, PREPARATION, AND SUPPLY When preparing the oven for installation at a location, the latest International, National or Local Requirements should be adhered to.
2-3 SECTION 2 INSTALLATION III. VENTILATION SYSTEM IMPORTANT Where international, national, or local codes require the installation of fire suppression equipment or other supplementary equipment, DO NOT mount the equipment directly to the oven.
2-4 SECTION 2 INSTALLATION PS360L/WB-L Tandem PS360/WB Double Tandem PS360U/WB-U Tri Tandem Item Part # Description PS360U/WB-U Quad Tandem 1 22361-0001 Flexible Gas Hose 2 4 3 4 2 22450-0028 Adjustable Legs 8 8 12 16 3 30773 Flue Vent, 14"Lg. 2 - - - 4 30759 Flue Vent, 29-1/2"Lg.
2-5 SECTION 2 INSTALLATION 6” 152mm 10-1/2” 267mm 16-1/2" 419mm 11-1/2" 292mm 27-1/4" 692mm 27-1/4" 692mm 54-1/2" 1384mm 17-3/4" 451mm 31-1/2" 800mm 45-1/2".
2-6 SECTION 2 INSTALLATION 34" 864mm 16-1/2" 419mm 11-1/2" 292mm 27-1/4" 692mm 27-1/4" 692mm 54-1/2" 1384mm 5-27/32" 148mm 10-1/8" 258mm 6-1/4" 158mm 11-1/.
2-7 SECTION 2 INSTALLATION Figure 2-7 Dimensions and Data: PS360U Tri Tandem.
2-8 SECTION 2 INSTALLATION Figure 2-8 Dimensions and Data: PS360WB-U Tri Tandem.
2-9 SECTION 2 INSTALLATION Figure 2-9 Dimensions and Data: PS360U Quad Tandem.
2-10 SECTION 2 INSTALLATION Figure 2-10 Dimensions and Data: PS360WB-U Quad Tandem.
2-11 SECTION 2 INSTALLATION IV. THERMOCOUPLE INSTALLATION 1. Install the thermocouple sensing bulb into the correct hole in rear of bake chamber as shown in Figure 2-11. 2. Thread thermocouple lead through grommet and into the machinery compartment. 3.
2-12 SECTION 2 INSTALLATION 8 7 6 5 4 L2 L1 9 10 11 12 13 14 15 16 4. Connect the thermocouple leads to the temperature con- troller as shown in Figure 2-13.
2-13 SECTION 2 INSTALLATION V. ASSEMBLY If the installation includes upper ovens mounted atop lower ovens, the ovens must be stacked before joining the tandem ovens together. If the installation includes ovens that are to be mounted on stands, assemble the ovens to the stands before joining the ovens together.
2-14 SECTION 2 INSTALLATION JOINING THE OVEN BODIES For TANDEM and DOUBLE TANDEM installations, perform Steps 1-7 to join the ovens. For TRI TANDEM installations, perform Steps 1-7 to join two of the ovens together, and ensure that they are level; then, repeat Steps 1-7 to join the third oven to the two that are assembled.
2-15 SECTION 2 INSTALLATION 3. Insert three of the supplied 1/2 x 5 bolts through the holes in the frame of the right oven, pointing outward as shown in Figure 2-17. Then, slide the spacers into place on the bolts. 2-1/2 x 8 (64 x 203mm) spacers 2-1/2 x 2-1/2 ( 64 x 64mm) spacers Bolts Figure 2-17 Bolts and Spacers 4.
2-16 SECTION 2 INSTALLATION 5. Check the alignment of the track rails using a straightedge. The rails MUST BE LEVEL across the gap between the ovens. If necessary, adjust the oven legs to align the track rails. Figure 2-19 Checking Track Rail Alignment 6.
2-17 SECTION 2 INSTALLATION 9 . Test-fit the transition section of the conveyor frame, as shown in Figure 2-21. The alignment pins on the bottom of the frame ensure correct spacing of the center ovens. Figure 2-21 Transition Frame Placement 10. Attach the two angled support brackets between the two center ovens, as shown in Figures 2-22a and 2-22b.
2-18 SECTION 2 INSTALLATION 10. Remove the transition section of the conveyor frame. Place the transition floor panel into place atop the support brackets. See Figure 2-23. 11. Replace the transition (center) conveyor section, as shown in Figure 2-24.
2-19 SECTION 2 INSTALLATION INSTALLING THE CONVEYOR FRAME AND BELT 1. Insert the conveyor frame into the oven as follows: For TRI TANDEM ovens, slide one center section and one end section of the frame into EACH END of the oven. The four sections should butt against each other.
2-20 SECTION 2 INSTALLATION 2 . Slide the conveyor belt through the support rods underneath the frame, and thread it through the oven. Then, reach through the oven window and pull the free end of the belt through the oven so that it lies atop the conveyor frame.
2-21 SECTION 2 INSTALLATION 5. For a TANDEM, DOUBLE TANDEM, or TRI TANDEM oven installation, skip ahead to the next section. For a QUAD TANDEM oven installation, continue on to Step 6. Figure 2-29 Transition Assembly 6. Slide the top transition panel into place.
2-22 SECTION 2 INSTALLATION 6 6 4 5 2 2 3 3 1 5 GAS OVEN ROUGH-IN UTILITY ROUGH-IN DIMENSIONS AND POSITIONING GAS SUPPLY & ELECTRICAL SUPPLY PROVIDED BY CUSTOMER DO NOT USE CONDUIT FOR GROUND CIRCUIT BREAKER 1 circuit breaker/fused disconnect switch with lockout/tagout is required for each oven cavity.
2-23 SECTION 2 INSTALLATION VI. ELECTRICAL CONNECTION Check the oven data plate before making any electric supply connections. Electric supply connections must agree with data on the oven data plate. A typical oven data plate is shown in Figure 2-34 (on Page 2-24).
2-24 SECTION 2 INSTALLATION Figure 2-34 Typical Oven Data Plate - Models PS360/PS360WB.
2-25 SECTION 2 INSTALLATION Figure 2-35 Flexible Hose Connector Installation Appliance Connection/ Male Nipple Flexible Hose Correct Position Full-Flow Gas Shutoff Valve To Gas Supply Pipe 90° ST Elbow Union VII. GAS SUPPLY FOR GAS HEATED OVENS Pipe sizing -- Always install a shut off valve in the gas supply line to the oven.
2-26 SECTION 2 INSTALLATION VIII. PREPARATION FOR VARIOUS GASES Before proceeding to set up the oven for a specific gas, the main gas supply valve and the electrical supply circuit breaker should be turned off.
2-27 SECTION 2 INSTALLATION Outlet Pressure Tap Low Flame Bypass Orifice 3/4 Union Pilot Line Low Flame Bypass Line 1/2 Nuts Main Orifice Governor Adjustment Gas Converter Inlet Pressure Tap Ins.
2-28 SECTION 2 INSTALLATION IX. CHANGING ORIFICES TO CHANGE MAIN ORIFICE (Refer to Figure 2-36) 1. Turn off main gas supply valve. 2. Open 3/4" union in gas supply line. 3. Remove 1/2" nuts securing gas train to the burner housing. 4. Using a 11/16" wrench remove orifice from the mounting flange.
2-29 SECTION 2 INSTALLATION 4. Replace cover screw on adjustment valve and turn off main gas supply valve. 5. Record the reading obtained from the gas meter and calculate obtained gas flow. Compare this to the indicated flow in the CHART OF ORIFICE SIZES, GAS PRESSURES, NOMINAL INPUT RATINGS AND GAS FLOW on Page 1.
2-30 SECTION 2 INSTALLATION SPECIAL NOTICES: The ovens should be operated only in an area that has good air circulation. The oven must be installed under an electrically powered ventilating hood. Installation of replacement parts requiring access to the interior of the oven is permitted only by authorized service personnel.
3-1 SECTION 3 OPERATION SECTION 3 OPERA TION I. CONTROL FUNCTIONS Figure 3-1. Oven Controls RESET RESET Ignition Reset Switch Door Safety Switch (Inside) Blower Switch Heat Switch Conveyor Switch Temp.
3-2 SECTION 3 OPERATION II. COMPONENT INFORMATION AND LOCATION (EACH OVEN SECTION) A. Door Safety Switch Located at the inside upper left corner of the control box. WARNING: DO NOT TOUCH THE WIRES GOING TO THIS SWITCH BECAUSE CUR- RENT IS ALWAYS PRESENT.
3-3 SECTION 3 OPERATION to maintain a constant temperature. The temperature controller contains a high-limit (safety) switch that shuts down the oven when the oven reaches 343°C (650° F) and a low-limit switch which allows the oven to cool down to 82° C (180° F) before shutting off the blowers.
3-4 SECTION 3 OPERATION III. STEP-BY-STEP OPERATION A. Startup Procedure 1. Turn on the main disconnect switch / circuit breaker. 2. Open the manual gas supply valve. 3. Turn the blower switch to "I" (on) 4. Set the temperature controller to the desired baking temperature.
3-5 SECTION 3 OPERATION 5. Turn the heat switch to "I" (on). The ignition system goes through a 45-second purge time after which the pilot lights and ignites the burner. If the burner does not ignite, the red light on the "RESET" pushbutton switch will light.
3-6 SECTION 3 OPERATION Middleby Marshall ALM HEAT 251 TEMP C Figure 3-8 b. Changing the 'set point'. Press the UP Arrow button ▲ or DOWN Arrow button ▼ . The temperature set point will increase or de- crease. If this button is kept depressed, the tempera- ture set point will continue to increase or decrease at a faster rate.
3-7 SECTION 3 OPERATION Figure 3-9 Middleby Marshall ALM HEAT 92 S E T P T 2 C b. Press the TEMPERATURE button again to display the 'set point'. If the TEMPERATURE button is not pressed, the display automatically shows the tem- perature set point after 60 seconds.
3-8 SECTION 3 OPERATION Middleby Marshall ALM HEAT 260 S E T P T 1 C Figure 3-10 b. HEAT - The HEAT window will display either a "1" or it will be blank. See Figure 3-10. AA. The "1" signals that the temperature controller is calling for heat and the burner is turned full on.
3-9 SECTION 3 OPERATION Figure 3-11 Middleby Marshall ALM HEAT 92 FAIL SF 2 C c . FAILSF (Failsafe) See Figure 3-11. AA. If the oven does not reach 200°F (93°C) in 15 minutes, the temperature controller will shut off the high flame valve and begin flashing “FAILSF” and “SET PT” alternately.
3-10 SECTION 3 OPERATION C. Shutdown Procedure 1. Turn the blower and heat switches to "0" (off). NOTE: The blowers will remain on, until the oven temperature cools down to 93°C (200°F) at which time they will stop automatically.
3-11 SECTION 3 OPERATION E. Bake Time vs. Bake Temperature Along with oven temperature, the bake is dependent on the conveyor speed (or 'bake time'); that is, the time it takes the product to pass through the oven. 1. 'Bake time' is actually conveyor speed and is defined as the time the pizza is actually in the oven.
3-12 SECTION 3 OPERATION F. Conveyor Speed (Bake Time) and Time of Delivery CONVEYOR SPEED (BAKE TIME)- As stated in the previous paragraphs, conveyor speed (bake time) is defined as the amount of time that elapses between the time when the Leading edge of a pizza enters the oven and when the leading edge exits the oven.
4-1 SECTION 4 MAINTENANCE SECTION 4 MAINTENANCE Top Grill Figure 4-1. Oven Cooling Fans -Two on upper oven and two on lower oven CAUTION: DO NOT use any abrasive clean- ing materials or water spray. Wipe clean only . Cleaning with a water hose or pressurized steam cleaning equipment voids the oven warranty.
4-2 SECTION 4 MAINTENANCE C. Conveyor Belts (Tandem and Double Tandem Ovens only) Everyday, stand at the unloading end of the conveyor with a brush (Figure 4-2, lower oven). Brush all crumbs off the belt so that they fall into the crumb pan below the conveyor.
4-3 SECTION 4 MAINTENANCE The crumb pans with cutout holes (and an end shield attached on the inner end) are used at the left end (conveyor motor end) of an upper oven. The shield protects the conveyor motor from heat. The crumb pans without cutout holes are installed on a lower oven.
4-4 SECTION 4 MAINTENANCE II. MAINTENANCE - MONTHLY W ARNING: Before performing any further maintenance, turn the main power switch off. NOTE: The interior may require cleaning more than once a month, depending on the volume of baking. To clean the interior, you must disassemble some parts of the oven.
4-5 SECTION 4 MAINTENANCE NOTE: The conveyor assembly of a tandem or a double tandem oven can be removed from either end of oven. If you are removing the conveyor from the end of the oven without the drive motor, the drive sprocket as- sembly must be removed by loosening the 3/32" set screw on the conveyor drive shaft collar.
4-6 SECTION 4 MAINTENANCE Figure 4-8. "Finger Arrangement" Identifiers Figure 4-10. Air Finger Removal Air fingers and blank plates should be marked in the order shown, as viewed from the front of the oven. (The finger arrangement numbers for an upper oven can be pre- ceded with a "U"; example: UB1, UT2, etc.
4-7 SECTION 4 MAINTENANCE Figure 4-11. Outer Plate Disassembly 3. After removing each air finger, place it in an upright position to remove the outer plate . Gently, step on the lip of the finger manifold and pull the outer plate upward to disassemble it, as shown in Figure 4-11.
4-8 SECTION 4 MAINTENANCE Figure 4-13. Air Finger Parts Figure 4-14. Inner Plate Reassembly Details C. Reassembly and reinstallation of air fingers Each air finger is made up of one inner plate, one outer plate and one finger manifold (Figure 4-13). Be sure to match the 'finger arrangement' identifier markings (T1, T2, etc.
4-9 SECTION 4 MAINTENANCE 4. Ensure that the air fingers and blank plates fit tightly together in the channel with edges interlocked and no space between edges, as shown in Figure 4-15.
4-10 SECTION 4 MAINTENANCE Figure 4-16. Checking Conveyor Belt Tension Figure 4-17. Conveyor Belt Master Links Master Links D. Checking conveyor belt tension WARNING: Oven conveyor belt must be cool for adjusting tension. DO NOT adjust belt when HOT. 1.
4-11 SECTION 4 MAINTENANCE Master Link Figure 4-18. Unhooking the Master Links Figure 4-19. Entire Link Removal Correct Position Incorrect Position Figure 4-20. Master Link Positions 2. Unhook the master links at the end of conveyor belt, using long-nosed pliers, as shown in Figure 4-18.
4-12 SECTION 4 MAINTENANCE Direction of Travel Figure 4-21. Outer Master Link Connection Figure 4-22. Right-edge Outer Master Link Position 5. Reconnect the outer master links, as shown in Figure 4-21. IMPORTANT NOTICE: The outer master links have right and left sides to them.
4-13 SECTION 4 MAINTENANCE II. MAINTENANCE - EVERY 3 MONTHS W ARNING: All electric power must be shut off before beginning this maintenance procedure. NOTE: It is recommended that an authorized Middleby Marshall service agent should perform the 3-month and 6-month maintenance procedures.
4-14 SECTION 4 MAINTENANCE IV. MAINTENANCE - EVERY 6 MONTHS W ARNING: All electric power must be shut off before beginning this maintenance procedure. NOTE: It is recommended that an authorized Middleby Marshall service agent should perform the 3-month and 6-month maintenance procedures.
5-1 SECTION 5 TROUBLESHOOTING SECTION 5 TROUBLESHOOTING PROBLEM: PRODUCTS OVERCOOKED OR UNDERCOOKED Check for correct setting of conveyor speed control. Set conveyor speed control at correct setting. Check set tempera- ture on temperature controller of each oven section.
5-2 SECTION 5 TROUBLESHOOTING PROBLEM: CONVEYOR WILL NOT HOLD PROPER SPEED OR WILL NOT RUN AT ALL Check if conveyor is jammed on something in oven. Check for proper tension of conveyor drive chain and conveyor belt. Refer to MAINTE- NANCE Section for checking procedure.
5-3 SECTION 5 TROUBLESHOOTING PROBLEM: OVEN SECTION(S) WILL NOT TURN ON WHEN THE SWITCHES ARE TURNED ON Check if wall circuit breakers are turned on. If oven section(s) still will not respond, call your local Middleby Marshall Authorized Service Agent.
5-4 SECTION 5 TROUBLESHOOTING NOTES:.
SECTION 7 ELECTRICAL SCHEMATICS 6-1 SECTION 6 ELECTRICAL SCHEMATICS.
Electrical Wiring Diagram: PS360/360WB Tandem and Double Tandem Ovens 6-2 SECTION 6 ELECTRICAL SCHEMATICS.
Electrical Wiring Diagram: PS360/360WB Tri Tandem and Quad Tandem Ovens 6-3 SECTION 6 ELECTRICAL SCHEMATICS.
Electrical Schematic: PS360/360WB Tandem Ovens (all versions) 6-4 SECTION 6 ELECTRICAL SCHEMATICS.
NOTES: 6-5 SECTION 6 ELECTRICAL SCHEMATICS.
Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin, IL 60120 (847)741-3300 FAX (847)741-4406 Middleby Corp 24-Hour Service Hotline 1-800-238-8444 www.
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