Middleby Marshall PS528G manual

©2012 Middleby Marshall Inc. A MIDDLEBY COMP ANY PS528-Series Gas Ovens: English owner's operating & installation manual PS528-Series OVENS Model PS528G PS528 (Triple) PS528 (Double) Part No. 63935 Rev. C Price $30.00 P: 04/12 PS528 (Single)[...]

ii WARNING FOR YOUR SAFETY, DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE. WARNING Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operation, and maintenance instructions thoroughly before in[...]

iii 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 Seller’s obligation under this warranty shall be limited to replacing or repairing, at Seller’s option, without charge, F.O.B. Seller’s factory, any[...]

iv NOTE Wiring Diagrams are in Section 6 of this Manual. The diagram for each oven is also on the lower inner surface of its Control Console. TABLE OF CONTENTS Page SECTION 1 I. MODEL IDENTIFICATION ..............................................1 SERIES PS528 GAS SPECIFICATIONS .............................2 II. COMPONENT FUNCTION .................[...]

SECTION 1 DESCRIPTION 1 I. MODEL IDENTIFICATION The Middleby Marshall PS528-Series may be used either as a single oven or stacked for use as double or triple ovens. A s ing le PS 528-Series Oven (Figure 1-1) is mounted on a base pad with legs. A double oven (Figure 1-2) consists of two, stacked, single ovens. A triple oven (Figure 1-3) consists of [...]

2 SECTION 1 DESCRIPTION PS528 SERIES OVEN SPECIFICATIONS Conveyor Belt Width 18.00" (457mm) Heating Zone Length 28.00" (711mm) Baking Area Square Feet 3.5 sq. ft. (0.33 sq. m.) Overall Dimension Standard Single Oven w/Legs 50.00" (1270mm) L × 40.75" (1035mm) W × 21.72" (786mm) H × Overall Dimension Double Oven 50.00"[...]

SECTION 1 DESCRIPTION 3 II. COMPONENT FUNCTION (Figure 1-4) Figure 1-4. PS528-Series Oven Components Locations[...]

4 SECTION 1 DESCRIPTION II. COMPONENT FUNCTION A. Conveyor Motor and Conveyor Belt The conveyor belt is driven by a variable-speed electric motor (Figure 1-5) operating through a gear reducer. The motor speed is controlled by a digital control. The stainless-steel wire belt can travel in either direction at variable rates ranging from 3 minutes to [...]

SECTION 1 DESCRIPTION 5 Figure 1-6. Cooling Fan[...]

6 SECTION 1 DESCRIPTION Figure 1-7. Blank Plates (two sizes) and an Air Finger. F2. Blank Plates 1. Blank Plates- The Blank Plates are available to install on the plenum where an air nger is not required.[...]

SECTION 2 INSTALLATION 7 W ARNING Keep the appliance area free and clear of combustibles. W ARNING Do not obstruct the ow of combustion and ventilation air to and from your oven. There must be no obstructions around or underneath the oven. Constructional changes to the area where the oven is installed shall not affect the air supply to the oven.[...]

8 SECTION 2 INSTALLATION PARTS LIST FOR SERIES PS528 GAS OVEN INSTALLATION KIT Single Stack Oven P/N 63946 ITEM NO. QTY PART NO. DESCRIPTION 1 4 3101908 LEG 4 ″ AD FT 2 1 62208 INSULA TION BOTTOM TRA Y 3 1 62206 BOTT OM TRA Y WELDMENT 4 1 61650 TOP COVER 5 4 51387 SCREW MSSL T THREAD 8-32 × 1/2, 18-8 7 1 22450-0228 GAS HOSE RESTRAINT CABLE 8 1 2[...]

SECTION 2 INSTALLATION 9 Figure 2-1 (continued). PS528-Series Gas Oven Installation Parts ITEM NO. QTY P ART NO. DESCRIPTION 1 2 62208 INSULA TION BOTTOM TRA Y 2 1 62206 BOTT OM TRA Y WELDMENT 3 1 61650 TOP COVER 4 4 51387 SCREW MSSL T THREAD 8-32 × 1/2, 18-8 5 4 M3828 PIN, ALIGNMENT 7 1 22450-0228 GAS HOSE RESTRAINT CABLE 8 3 22361-0001 GAS HOSE [...]

10 SECTION 2 INSTALLATION Figure 2-5. MODEL PS528 SINGLE OVEN DIMENSIONS The Opening Height is Adjustable from 2-1/4 inch minimum to 3-3/4 inch maximum in 1/2 inch increments. 1 1[...]

SECTION 2 INSTALLATION 11 Figure 2-6. MODEL PS528 DOUBLE OVEN DIMENSIONS 1 The Opening Height is Adjustable from 2-1/4 inch mini- mum to 3-3/4 inch maximum in 1/2 inch increments. P/N 59927 is shown in its correct installed position. 1 2[...]

12 SECTION 2 INSTALLATION Figure 2-7. MODEL PS528 TRIPLE OVEN DIMENSIONS 1 The Opening Height is Adjustable from 2-1/4 inch mini- mum to 3-3/4 inch maximum in 1/2 inch increments. P/N 59927 is shown in its correct installed position. 1 2[...]

SECTION 2 INSTALLATION 13 WARNING DO NOT USE CONDUIT OR GAS LINE FOR GROUND CONNECTION. CAUTION IT IS RECOMMENDED THA T THE OVEN BE PLACED UNDER A VENTILA TION HOOD FOR ADEQUA TE AIR SUPPL Y AND VENTILA TION. ELECTRIC SUPPLY TO BE PROVIDED BY CUSTOMER CIRCUIT BREAKER Separate circuit breaker with lockout/tagout electrical shutoff for each oven. Wir[...]

14 SECTION 2 INSTALLATION II I . ELECTRICAL CONNECTION INFORMATION FOR PS52 8 -SERIES OVENS. WARNING Authorized supplier personnel normally accom- plish the connections for the ventilation system, electric and gas supplies, as arranged by the customer. Following these connections, the factory-authorized installer can perform the initial startup of [...]

SECTION 2 INSTALLATION 15 V . GAS SUPPL Y CAUTION DURING PRESSURE TESTING NOTE THE FOLLOWING: 1. The oven and its individual shutoff valve must be dis- connected from the gas supply piping system during any pressure testing of that system at test pressure in excess of 1/2 psi (3.45 kPa). 2. The oven must be isolated from the gas supply piping syste[...]

16 SECTION 2 INSTALLATION = G. Maintenance It is recommended to check yearly the minimum and the maximumsettingandreadjustthemifnecessary . H. Connection W ARNING Some procedures in this section may require conversions, readjustments, or service on the oven's gas system. Before performing these procedures, check that the main[...]

SECTION 2 INSTALLATION 17 If the installation will use the supplied gas hose, be sure that the 1/2" to 3/4" gas line tting is attached.  Refer to the instructions in the gas hose package. One gas line connection method is shown in Figure 2-15; however , compliance with the applicable standards and[...]

18 SECTION 2 INSTALLATION NOTES[...]

SECTION 3 OPERATION 19 SECTION 3 OPERATION I. CONTROL FUNCTIONS WARNING A possibility of injury from rotating parts and electric shock exists in this oven. Never disassemble or clean the oven with the BLOWER switch or any other oven control turned “ON” or “I”. Turn “OFF” or “O” and lockout or tagout all electric power to the oven be[...]

20 SECTION 3 OPERATION II. COMPONENT INFORMATION AND LOCATION (Figures 3-1 and 3-2) A. Door Safety Switch The Door Safety Switch is located at the lower right side of control panel opening. Opening the control panel door permits this switch to open, disconnecting power to all electrical controls. CAUTION Do NOT touch the wires going to this safety [...]

SECTION 3 OPERATION 21 E. Conveyor The on-off switch for the conveyor motor is on the con- trol panel. Also on the control panel is the digital con- veyor speed control. The digital control can be adjusted from 1-10 min. bake time (conveyor speed). Refer to Figure 3-3. Conveyor speed is measured by the amount of time it takes for an item to go thro[...]

22 SECTION 3 OPERATION W ARNING OVEN MUST BE KEPT CLEAR OF COMBUSTIBLES A T ALL TIMES. III. STEP-BY-STEP OPERATION A. Startup Procedures Daily Startup 1. Turn the BLOWER switch (Figure 3-6) to the “ON” or “I” position. This starts the main blower fan and the cooling fans. The blower circulates air through the air ngers and must stay on d[...]

SECTION 3 OPERATION 23 Figure 3-6. Control Panel[...]

24 SECTION 3 OPERATION CAUTION In case of power failure, turn all switches to the “OFF” ("O") position and remove the product. After the power has been restored, perform the normal startup pro- cedure. IF THE OVEN W AS SWITCHED OFF FOR LESS THAN 5 MINUTES, W AIT FOR A T LEAST FIVE MINUTES BEFORE REST ARTING THE OVEN. A.Daily Startup P[...]

SECTION 3 OPERATION 25 Display Shows the Set Point or the Actual T em- perature in degrees Fahrenheit (F) or Celsius (C). "SP LOCK" Light Lights when the set point is locked out from changes. This setting can only be changed by service personnel. OVERTEMP Light Lights when the oven temperature is greater than650°F(343°C). Re[...]

26 SECTION 3 OPERATION V. QUICK REFERENCE: TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION The oven temperature exceeded 650°F (343°C), and the burner was automatically shut down. • Follow the procedures under Daily Shutdown Procedures in this section to shut down the oven. Contact your Middleby Marshall Authorized Service Agen[...]

SECTION 4 MAINTENANCE 27 SECTION 4 MAINTENANCE WARNING Possibility of injury from rotating parts and electrical shock exist in this oven. Turn off and lockout or tagout electrical supply to oven(s) before attempting to disassemble, clean or service oven(s). Never disassemble or clean the oven with the blower switch or any other part of the oven tur[...]

28 SECTION 4 MAINTENANCE I. MAINTENANCE - DAILY A. Exterior Everyday you should clean the outside of the oven with a soft cloth and mild detergent. WARNING Never use a water hose or pressurized steam cleaning equipment when cleaning the oven. B. Cooling Fan 1. ONE COOLING FAN GRILLE AT THE REAR OF THE OVEN MUST BE CLEANED DAILY - Clean grille with [...]

SECTION 4 MAINTENANCE 29 Figure 4-3. NOTE: The oven interior may require cleaning more than once a month depending on the volume of baking. To clean the interior, you have to disassemble some parts of the oven. When cleaning your Series PS528 Oven note the following: PRECAUTIONS - 1. Do not use excessive water or saturation of oven insulation will [...]

30 SECTION 4 MAINTENANCE side. 6. Remove conveyor as shown. Figure 4-6. Figure 4-7. CAUTION Be careful not to bump the drive sprocket while handling the conveyor, to avoid damaging the drive shaft. Figure 4-4. Figure 4-5.[...]

SECTION 4 MAINTENANCE 31 B. Air Fingers Disassembly For Cleaning 1. As the air ngers are removed use a felt pen to mark all parts of the ngers. This includes the nger manifold, inner plate and the outer plate (refer to Figure 1-9). If a blank or choke plate is used, mark that plate also. Fingers are marked in the order shown; as viewed fro[...]

32 SECTION 4 MAINTENANCE 6. To remove the inner plate, pull the plate out and then up. Figure 4-11. 7. The outer nger plate is stainless 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. Figure 4-12. Standard Lower Finger Figure 4-13. Standa[...]

SECTION 4 MAINTENANCE 33 4. Replace the air ngers by pushing in at the back side. Remember to replace them according to the numbers marked on them when they were removed. They must go back in the same way they came out. IMPORTANT: When inserting ngers the tab on the outer plate must be in the groove as shown in Figure 4-18. There is a blockin[...]

34 SECTION 4 MAINTENANCE 5. Install ngers and blank plates correctly with edges interlocked and no space between edges. Figure 4-18. Top Finger Incorrect - Too Much Space Blank Plate Tab on Outer Plate of Finger Located in Groove Top Finger Incorrect - Too Much Space Blank Plate Tab on Outer Plate of Finger Located in Groove Top Finger Correct -[...]

SECTION 4 MAINTENANCE 35 D. Reinstall End Plugs 1. Reinstall lower end plug. Be sure to tighten the wing screw on the end plug. 2. Reinstall conveyor. 3. Reinstall upper end plug. Be sure to tighten two wing screws on the end plug. Figure 4-19. Figure 4-20.[...]

36 SECTION 4 MAINTENANCE F. Checking Conveyor Belt Tension WARNING Oven conveyor belt must be cool when adjusting belt. Do not adjust belt if HOT. 1. With the conveyor assembly in the oven, stand at one end of conveyor and check tension by lifting the conveyor belt at the center of the oven chamber opening. The belt should not lift higher that 1 ?[...]

SECTION 4 MAINTENANCE 37 1. Using long nose pliers, an entire link can be removed with the conveyor assembly either in or out of the oven. Position master links at end of conveyor as shown in Figure 4-24. Figure 4-24. 2. Using long nose pliers, unhook master links at left end of conveyor as shown in Figure 4-25. Figure 4-25. 3. Remove the outside m[...]

38 SECTION 4 MAINTENANCE H. Attaching Drive Chain 1. If drive sprocket assembly was removed reassemble it into the conveyor drive shaft. Be sure at on end of drive shaft aligns with set screw in conveyor shaft collar. Once in place tighten 3/32 ″ set screw. 2. Lift conveyor and install drive chain to conveyor drive sprocket and motor sprocket.[...]

SECTION 4 MAINTENANCE 39 4. Reattach conveyor guard to control panel and secure two screws. Install both upper end plugs. Figure 4-34. III. MAINTENANCE - EVERY 3 MONTHS WARNING Shut OFF all electrical power and lock/tag out the switch before attempting maintenance work. NOTE: I t is recommended that the 3-month maintenance be performed by an author[...]

40 SECTION 4 MAINTENANCE KEY SPARE PARTS KIT An oven can be purchased with a Key Spare Parts Kit (Figure 4-36). (The kit can be purchased when the oven is ordered, or later, from a Middleby Marshall Authorized Parts Distributor). The kit contains many of the crucial parts that can reduce serious downtime and loss of pro- duction, if a failure occur[...]

41 SECTION 5 TROUBLESHOOTING SECTION 5 TROUBLESHOOTING PROBLEM: PRODUCTS ARE OVERCOOKED OR UNDERCOOKED Check for correct setting of conveyor speed control. Set the conveyor speed control at correct setting. Check for correct setting on tempera- ture controller. Turn temperature control to correct setting. If products still cook incorrectly, call yo[...]

SECTION 5 TROUBLESHOOTING 42 NOTES[...]

43 SECTION 6 ELECTRICAL SCHEMATICS SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, G208-240 50/60 GO, PS528G • P/N 62317 REV B[...]

Middleby Cooking Systems Group • 1400 T oastmaster Drive • Elgin, IL  60120 • USA  • (847)741-3300 • F AX (847)741-4406 www .middleby .com Middleby is proud to support the Commercial Food Equipment Service Association (CFESA). We recognize and applaud CFESA&a[...]