PS360/360WB Tandem Gas Ovens: English A MIDDLEBY COMPANY owner's operating & installation manual SERIES PS360/360WB TANDEM GAS OVEN MODELS PS360L/PS360WB-L Tandem PS360/PS360WB Double Tandem PS360U/PS360WB-U Tri Tandem © 1998 Middleby Marshall Inc. PS360U/PS360WB-U Quad Tandem Part No. 38615 Price US $30.00 R. Aug. 98, Rev. B, Ver.
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. This manual must be kept in a prominent, easily reachable location near the oven. The oven has a combustion system suitable for use with all natural gases and can be converted by a qualified service agent for use with liquified gas. It is suggested to obtain a service contract with a manufacturer's certified service agent.
MIDDLEBY MARSHALL INC. OVEN LIMITED WARRANTY (Non U.S.A.) The seller warrants equipment manufactured by it to be free from defects in material and workmanship for which it is responsible. The Sellers obligation under this warranty shall be limited to replacing or repairing at Sellers option, without charge, F.O.B.
TABLE OF CONTENTS page SECTION 1 - DESCRIPTION OVEN SPECIFICATION CHARTS ............................ 1-1 CHART OF ORIFICE SIZES, GAS PRESSURES, NOMINAL INPUT RATINGS & GAS FLOW ....... 1-1 I. PRINCIPLE OF AIR FLOW ................................. 1-2 A. Heat Transfer And How It Works ................ 1-3 B. Air Fingers ................................................... 1-4 II. COMPONENT FUNCTION ................................. 1-5 A. Conveyor ..................................................... 1-5 B.
TABLE OF CONTENTS SECTION 4 - MAINTENANCE I. MAINTENANCE - DAILY ..................................... 4-1 A. Exterior ........................................................ 4-1 B. Fans and Grills ........................................... 4-1 C. Conveyor Belts ............................................ 4-2 D. Crumb Pans ............................................... 4-2 E. Window ....................................................... 4-3 II. MAINTENANCE - MONTHLY ..............................
NOTES: v
SECTION 1 DESCRIPTION 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) Shipping Cube, Single Oven 1750 lbs. (780kg) Approx. 104.5 ft (3.0 m ) 3 Rated Heat Input Approx. 122 ft.3 (3.5m3) 3 135,000 BTU (34,020 kcal, 40 kW/hr) Maximum Operating Temperature 170,000 BTU (42,840 kcal, 50 kW/hr) 550°F (288°C) Flue Vent 1.
SECTION 1 DESCRIPTION I. PRINCIPLE OF AIR FLOW 3 3 4 1 2 3 4 2 Figure 1-3 - AIR DELIVERY SYSTEM (per oven section) 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). The fingers contain an inner plate and outer plate which columnate the air and evenly distribute the heated air across the conveyor belt (4) on which the product rides.
SECTION 1 DESCRIPTION Air Flow From Plenum Chamber Inner Plate Outer Plate High Velocity Columns of Air to Product Air Flow From Plenum Chamber Inner Plate Outer Plate Figure 1-4. Air Fingers Showing Air Passing Through Inner Plate And Outer Plate Which Forms High Velocity Columns Of Air To Product. A. Heat Transfer and How It Works 1. Heat constantly moves from a warm object to a cold object. Heat moves using three different paths which are conduction, radiation and convection.
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. The columnated vertical streams of hot air provide an exceptional heat transfer rate and generally bake faster and at lower temperatures than convection hot air or infrared heating ovens. This is accomplished by the hot air fingers, (Figure 1-3 and 14) inside the oven.
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). The motor speed is controlled by a digital control. The stainless steel wire belt can travel in either direction and at variable speeds.
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. E. Blower A blower is located in each end of each oven section. These blowers force heated air through the oven and fingers. The blower switch has two positions, and must be on for oven warmup and bake. Figure 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. Outer plates are manufactured with 1 row of holes (L1 finger), 3 rows of holes (L3 finger), 6 rows of holes (L6 finger) or no holes (a radiant finger). 2.
SECTION 1 DESCRIPTION NOTES: 1-8
SECTION 2 INSTALLATION SECTION 2 INSTALLATION I. UNLOADING/UNPACKING Your Middleby Marshall Ovens are shipped partially assembled. Each oven section will arrive in its own crate of the following size and weight: Length: Width: Height: Weight: PS360U/PS360L 72 (183cm) 48 (122cm) 60 (152cm) 1675 lbs. (760kg) PS360WB-U/PS360WB-L 66 (167cm) 57 (144cm) 50 (127cm) 1750 lbs. (780kg) If you ordered stands for your ovens, they are shipped in separate crates.
SECTION 2 INSTALLATION 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. The ovens must be installed on an even (level) non-flammable flooring and any adjacent walls must be non-flammable. The minimum allowed distance from the rear of the oven to the wall is 12 (30cm). The ovens can be supported only by legs. No casters are allowed.
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. MOUNTING SUCH EQUIPMENT ON THE OVEN MAY: VOID AGENCY CERTIFICATIONS RESTRICT SERVICE ACCESS LEAD TO INCREASED SERVICE EXPENSES FOR THE OWNER REQUIREMENTS A mechanically driven ventilation system is required for the oven.
SECTION 2 INSTALLATION Figure 2-2 - INSTALLATION KIT PS360L/WB-L Tandem PS360/WB Double Tandem PS360U/WB-U Tri Tandem Item Part # Description 1 22361-0001 Flexible Gas Hose 2 4 3 PS360U/WB-U Quad Tandem 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 3 4 5 30758 Flue Vent, 50" Lg.
SECTION 2 INSTALLATION Figure 2-3 Dimensions and Data: PS360L Tandem 2” 51mm 3 45" 1143mm 40" 1016mm 42" 1067mm 32” 813mm 4 4 144-1/2" 3670mm 17-3/4" 451mm 42-3/4" 1086mm 17-3/4" 451mm 109" 2769mm 45-1/2" 1156mm 6-1/2" 165mm 31-1/2" 800mm 54-1/2" 1384mm 27-1/4" 692mm 27-1/4" 692mm 2 2 1 1 16-1/2" 11-1/2" 419mm 292mm 6” 152mm 10-1/2” 267mm Figure 2-4 Dimensions and Data: PS360WB-L Tandem 2” 51mm 3 53" 1346mm 48" 1219mm 40” 1016mm 50" 1270mm 4 4 144-1/2" 3670mm 17-3/4" 451mm 45-1/2"
SECTION 2 INSTALLATION Figure 2-5 Dimensions and Data: PS360 Double Tandem 2” 51mm 3 40" 1016mm 45" 1143mm 42" 1067mm 32” 813mm 4 4 17-3/4" 451mm 109" 2769mm 34" 864mm 144-1/2" 3670mm 54-1/2" 1384mm 27-1/4" 692mm 17-3/4" 451mm 81-1/2" 2070mm 1 2 6-1/4" 158mm 27-1/4" 692mm 11-1/2" 292mm 1 2 52" 1321mm 31-1/2" 800mm 1 6-1/2" 165mm 2 2 1 1 3 11-1/2" 292mm 5-27/32" 148mm 10-1/8" 258mm Figure 2-6 Dimensions and Data: PS360WB Double Tandem 2-6 16-1/2" 419mm
Figure 2-7 Dimensions and Data: PS360U Tri Tandem 2-7 SECTION 2 INSTALLATION
SECTION 2 INSTALLATION Figure 2-8 Dimensions and Data: PS360WB-U Tri Tandem 2-8
Figure 2-9 Dimensions and Data: PS360U Quad Tandem 2-9 SECTION 2 INSTALLATION
SECTION 2 INSTALLATION Figure 2-10 Dimensions and Data: PS360WB-U Quad Tandem 2-10
IV. SECTION 2 INSTALLATION 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. Figure 2-11 Thermocouple Installation Locations 3. Remove the right-side access panel of the machinery compartment.
SECTION 2 INSTALLATION 4. Connect the thermocouple leads to the temperature controller as shown in Figure 2-13. 5. Repeat Steps 1-4 for each of the other ovens in the installation.
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. An exploded view of the stand is shown in Figure 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. For QUAD TANDEM installations, perform Steps 1-7 for EACH PAIR of ovens, producing two sets of two joined ovens. Do not assemble the center bridge section at this time. 1.
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 2-1/2 ( 64 x 64mm) spacers Bolts 2-1/2 x 8 (64 x 203mm) spacers Figure 2-17 Bolts and Spacers 4. Push the ovens together. Check that the mounting bolts, alignment plate, and sealing gasket are properly aligned.
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. Tighten all of the attaching bolts. Check that the mating edges of the ovens align properly. If gaps appear between the tops of the ovens, it will be necessary to loosen the connecting bolts and realign the ovens.
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.
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. Figure 2-23 Installing the Transition Floor Panel 11. Replace the transition (center) conveyor section, as shown in Figure 2-24.
INSTALLING THE CONVEYOR FRAME AND BELT FOR ALL TYPES OF OVENS, ENSURE THAT THE DRIVE SECTION/END OF THE CONVEYOR FRAME IS PLACED ON THE SAME END OF THE OVEN AS THE CONVEYOR DRIVE MOTOR. 1. For a TANDEM or DOUBLE TANDEM oven, slide the conveyor frame assembly into either end of the oven.
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. Direction of travel Check that the links on the conveyor are oriented as shown in Figure 2-26. 3. Connect the inside master links. Check that the links are oriented as shown in Figure 2-27.
5. 6. Slide the top transition panel into place. Then, slide the two transition side panels into place. See Figure 2-29. 7. If the four latches are not already attached to the side and top transition panels, attach them in place as shown in Figure 2-29. 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.
SECTION 2 INSTALLATION GAS OVEN ROUGH-IN UTILITY ROUGH-IN DIMENSIONS AND POSITIONING CAUTION IT IS REQUIRED THAT THE OVEN BE PLACED UNDER A VENTILATION HOOD FOR ADEQUATE AIR SUPPLY AND VENTILATION. GAS SUPPLY & ELECTRICAL SUPPLY 5 PROVIDED BY CUSTOMER 2 To en v DO NOT USE CONDUIT FOR GROUND O 1 CIRCUIT BREAKER 1 circuit breaker/fused disconnect switch with lockout/tagout is required for each oven cavity. Wire each oven cavity separately.
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). NOTE: When the oven is installed, it must be electrically grounded in accordance with current IEC/CEE requirements and also with local codes.
SECTION 2 INSTALLATION Figure 2-34 Typical Oven Data Plate - Models PS360/PS360WB 2-24
VII. GAS SUPPLY FOR GAS HEATED OVENS Pipe sizing -- Always install a shut off valve in the gas supply line to the oven. This valve should be the same size as the supply line. Please remember that the longer the pipe runs, the more the pressure drops. One 90° elbow equals a 1,2 m length of pipe.
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. When preparing the oven for use of Group H or L Natural gases, the orifice (Manifold) pressure should be adjusted to the values shown in the chart on Page 1-1.
SECTION 2 INSTALLATION GAS TYPE AND PRESSURE LABEL IT ...... GB .... FR .... DE .... DE .... ES .... NL ..... BE .... II2H3+ ................... Predisposto per gas metano .................................................... 20 mbar II2H3+ ................... Adjusted for natural gas ........................................................... 20 mbar II2E+3+ ................. Essaye au gaz naturel (E/L) ................................................ 20-25 mbar II2ELL3B/P ...........
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. 5. Install new orifice in reverse order. WARNING Before operating oven check for gas leaks! TO CHANGE BYPASS (LOW FLAME) ORIFICE (Refer to Figure 2-36) 1. Turn off main gas supply valve. 2.
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. 6. Note the following comments and procedures to assure correct gas supply pressure and adjusting the gas valve to obtain proper orifice (manifold) pressure. XI.
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. The operator should be properly trained to the functioning of the oven. This instructions manual should be supplied to the operator.
SECTION 3 OPERATION SECTION 3 OPERATION I. CONTROL FUNCTIONS Blower Switch Ignition Reset Switch Heat Switch Conveyor Speed Controller and Conveyor Temperature Indicator Switch Controller Door Safety Switch (Inside) RESET RESET Ignition Reset Switch Door Safety Switch (Inside) Blower Switch Heat Switch Conveyor Temperature Switch Controller Figure 3-1. Oven Controls NOTE The ovens are only for professional use, and the ovens may only be used by qualified personnel.
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 CURRENT IS ALWAYS PRESENT. Opening the control panel permits the switch to open, disconnecting power to all electrical controls. B. Blower Switch The blower switch has two positions. The switch must be in the "I" (on) position for the burner to ignite, permitting the oven to heat.
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. E. Conveyor Switch The on/off ("I"/"0") switch for the conveyor drive motor is on the control panel of the controlling oven section.
SECTION 3 OPERATION Conveyor Speed Indicator (Tri Tandem / Quad Tandem version shown) Oven Control Panel Conveyor Speed Controller (Tri Tandem / Quad Tandem version shown) Middleby Marshall ALM HEAT 0 I 0 I 0 I 260 1 C SET PT Service Key Heat Switch Blower Switch RESET Temperature Controller Conveyor Switch Lighted Ignition Reset Switch Figure 3-6. Control Panel III. STEP-BY-STEP OPERATION A. Startup Procedure 1. Turn on the main disconnect switch / circuit breaker. 2.
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. The RESET switch must be pushed to restart the ignition sequence. This restarting can be repeated; however, after 15 minutes, the control system goes into automatic 'lockout.
SECTION 3 OPERATION b. Changing the 'set point'. Press the UP Arrow button ▲ or DOWN Arrow button ▼. The temperature set point will increase or decrease. If this button is kept depressed, the temperature set point will continue to increase or decrease at a faster rate. 2. Displaying the actual oven temperature. See Figure 3-8. a. To check the oven temperature, press the TEMPERATURE button once to display the actual oven temperature. The word “TEMP” also appears.
SECTION 3 OPERATION b. Press the TEMPERATURE button again to display the 'set point'. If the TEMPERATURE button is not pressed, the display automatically shows the temperature set point after 60 seconds. 3. Display Messages a. ALM - The ALM window will display either a “2” or will be blank. See Figure 3-9. AA. The “2” signals that the oven temperature is below 200°F (93°C).
SECTION 3 OPERATION 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. BB. When the HEAT window is blank, the temperature set point has been reached and the burner is turned down to low flame. CC. During normal operation, the "1" continues to blink on and off every few seconds.
SECTION 3 OPERATION 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. You will also note that the “2” in the ALM window stays on. This condition signals a problem in oven heating or heat sensing. BB. To reset the temperature controller, turn off the blower switch . Wait 10 seconds and turn the blower switch back on.
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. 2. Turn the conveyor switch to "0" (off), after making certain that there are no products left on the conveyor inside the oven. 3. Turn off the main gas supply valve. 4. Open the window.
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. This is measured by noting the time when the leading edge of the pizza enters the oven and the time the leading edge of the pizza leaves the oven.
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. Conveyor Speed (Bake Time) is controlled by adjusting the conveyor speed controller. Bake Time will be the same for any size pizza Bake Time Leading Edge of Product Figure 3-12.
SECTION 4 MAINTENANCE SECTION 4 MAINTENANCE CAUTION: DO NOT use any abrasive cleaning materials or water spray. Wipe clean only. Cleaning with a water hose or pressurized steam cleaning equipment voids the oven warranty. I. MAINTENANCE - DAILY A. Exterior Everyday, clean the outside of the oven using a soft cloth moistened with mild detergent. Rinse by wiping with a soft cloth moistened with clear water. Wipe dry. B. Fans and Grills 1. Clean the two fan grills (Figure 4-1) on the rear of each oven DAILY.
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. (Figure 4-3 shows crumb pans for both upper and lower ovens.) Figure 4-2.
SECTION 4 MAINTENANCE Conveyor End Stop Lift, and slide pan toward the oven; then, lower the pan. Conveyor Conveyor Extension Figure 4-4. Crumb Pan Removal Crumb Pan End Plug 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. 2. After cleaning, reinstall the crumb pans. E. Window 1.
SECTION 4 MAINTENANCE II. MAINTENANCE - MONTHLY WARNING: 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. A. Removing conveyor from oven for cleaning 1. Remove the crumb pans (Tandem and Double Tandem Ovens only). Refer to the Daily Maintenance procedures. 2.
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 assembly must be removed by loosening the 3/32" set screw on the conveyor drive shaft collar. Then, remove the drive sprocket assembly from the end of the shaft. 7. Pull the conveyor belt until its master links are near the end of the upper belt surface. Disconnect the master links.
SECTION 4 MAINTENANCE B. Disassembling the blank plates and air fingers for cleaning 1. Use a felt pen to mark each plate and all parts of the air fingers with a 'finger arrangement' identifier, like those shown in Figure 4-8, when removing the blank plates and air fingers from the oven baking chamber. This marking should include the finger manifold, inner plate, and the outer plate of each air finger. T1 T2 T3 T4 T5 T6 B1 B2 B3 B4 B5 B6 Figure 4-8.
SECTION 4 MAINTENANCE 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. Figure 4-11. Outer Plate Disassembly NOTE: The outer plate is stainless steel and may be cleaned by either soaking in a hot, strong detergent solution or using a caustic cleaner. The conveyor belt can also be cleaned in the same way. 4.
SECTION 4 MAINTENANCE 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.) on all the parts of each air finger during reassembly. Figure 4-13. Air Finger Parts 1. Reassemble the inner plate into the finger manifold (Figure 4-14). Keep your fingers clear to avoid pinching them.
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. Top Finger Incorrect, Too Much Space Blank Plate Figure 4-15.
SECTION 4 MAINTENANCE D. Checking conveyor belt tension WARNING: Oven conveyor belt must be cool for adjusting tension. DO NOT adjust belt when HOT. 1. Check the belt tension by lifting the conveyor belt (Figure 4-16). (The conveyor assembly can either be in or out of the oven.) The belt should not lift more than 3" to 4" (75 to 100 mm). Figure 4-16. Checking Conveyor Belt Tension 2.
SECTION 4 MAINTENANCE 2. Unhook the master links at the end of conveyor belt, using long-nosed pliers, as shown in Figure 4-18. Figure 4-18. Unhooking the Master Links Master Link 3. Unhook the complete belt link to be removed and slide it out (Figure 4-19). (Do not discard this removed link because it can be used for making spare master links.) Figure 4-19. Entire Link Removal 4. Prepare to reconnect the inner master links.
SECTION 4 MAINTENANCE 5. Reconnect the outer master links, as shown in Figure 4-21. Figure 4-21. Outer Master Link Connection IMPORTANT NOTICE: The outer master links have right and left sides to them. The right-edge master link has an open hook facing you, as shown in Figure 4-22. This will match the right outer edge of the conveyor belt. Remember, this hook travels backwards on the conveyor. Direction of Travel Figure 4-22. Right-edge Outer Master Link Position F.
SECTION 4 MAINTENANCE II. MAINTENANCE - EVERY 3 MONTHS WARNING: 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. A. Cleaning the blower motors (See Figure 4-23.) Remove the end panels from the machinery compartment. Clean the blower motors in each oven section and the surrounding area, using either compressed air or CO2.
SECTION 4 MAINTENANCE IV. MAINTENANCE - EVERY 6 MONTHS WARNING: 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. A. Check the brushes of the conveyor drive motor; when worn to less than 3/32" (2.4mm), replace the brushes. B. Clean and inspect the burner nozzle and electrode assembly.
SECTION 5 TROUBLESHOOTING SECTION 5 TROUBLESHOOTING PROBLEM: PRODUCTS OVERCOOKED OR UNDERCOOKED Check for correct setting of conveyor speed control. Check set temperature on temperature controller of each oven section. Set conveyor speed control at correct setting. Refer to OPERATION Section for procedure to set temperatures correctly. Verify food preparation process. If products still cook incorrectly call your local Middleby Marshall Authorized Service Agent.
SECTION 5 TROUBLESHOOTING PROBLEM: OVEN BLOWER AND CONVEYOR OPERATE BUT OVEN SECTION(S) WILL NOT HEAT If the oven section(s) do not reach 200°F (93°C) within 15 minutes, the temperature controller(s) will flash "FAILSF". To reset the temperature controller(s), turn the blower switch(es) off for 30 seconds. Try restarting the oven section(s) again. If the oven section(s) will not heat, call your local Middleby Marshall Authorized Service Agent.
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. PROBLEM: BLOWER MOTORS RUNNING BUT LITTLE OR NO AIR AT FINGERS Fingers assembled incorrectly after cleaning. Refer to the MAINTENANCE section for instructions on removing and reassembling the air fingers.
SECTION 5 TROUBLESHOOTING NOTES: 5-4
SECTION 6 ELECTRICAL SCHEMATICS SECTION 7 ELECTRICAL SCHEMATICS 6-1
SECTION 6 ELECTRICAL SCHEMATICS 6-2 Electrical Wiring Diagram: PS360/360WB Tandem and Double Tandem Ovens
6-3 SECTION 6 ELECTRICAL SCHEMATICS Electrical Wiring Diagram: PS360/360WB Tri Tandem and Quad Tandem Ovens
SECTION 6 ELECTRICAL SCHEMATICS 6-4 Electrical Schematic: PS360/360WB Tandem Ovens (all versions)
NOTES: 6-5 SECTION 6 ELECTRICAL SCHEMATICS
A MIDDLEBY COMPANY 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.middleby.