Middleby Marshall PS520G manual

©2006 Middleby Marshall Inc. Middleby Middleby Middleby Middleby Middleby Marshall Marshall Marshall Marshall Marshall A MIDDLEBY COMPANY PS520-Series Gas Ovens: English October 17, 2006 owner's operating & installation manual PS520-Series O VENS Model PS520G PS520 (Triple) PS520 (Double) Part No. 59223 Price $30.00 P: 10/06 ® PS520 (Sin[...]

ii W ARNING FOR Y OUR SAFETY , DO NO T ST ORE OR USE GASOLINE OR O THER FLAMMABLE V APORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY O THER APPLIANCE. W ARNING Improper installation, adjustment, alteration, service, or maintenance can cause pr oper ty damage, injury , or death. Read the installation, operation, and maintenance instructions thorough[...]

iii MIDDLEBY MARSHALL INC. O VEN LIMITED W ARRANTY (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, [...]

iv NO TE 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 PS520 GAS SPECIFICATIONS ............................ 2 II. COMPONENT FUNCTION ...............[...]

SECTION 1 DESCRIPTION 1 I . MODEL IDENTIFICATION The Middleby Marshall PS520-Series may be used either as a single oven or stacked for use as double or triple ovens. A single PS520-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 th[...]

2 SECTION 1 DESCRIPTION PS520 SERIES OVEN SPECIFICATIONS Conveyor Belt Width 18.00 ″ (457mm) Heating Zone Length 20.00 ″ (5098mm) Baking Area Square Feet 2.5 sq. ft. (0.23 sq. m.) Overall Dimension – Standard Single Oven w/Legs 42.00 ″ (1067mm) L × 35.21 ″ (894mm) W × 21.10 ″ (536mm) H × Overall Dimension – Double Oven 42.00 ″ (1[...]

SECTION 1 DESCRIPTION 3 II. COMPONENT FUNCTION (Figure 1-4) Figure 1-4. PS520-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 stain- less-steel wire belt can travel in either direction at variable rates ranging from 3 minutes t[...]

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

6 SECTION 1 DESCRIPTION Half Blank Plate Blank Plate Outer Plate Inner Plate Finger Manif old Assembly Baffle 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 finger is not required.[...]

SECTION 2 INSTALLATION 7 WARNING Keep the appliance area free and clear of combustibles. 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. Constructional changes to the area where the oven is installed shall not affect the air supply to the oven. CA[...]

8 SECTION 2 INSTALLATION PARTS LIST FOR SERIES PS520 GAS OVEN INSTALLATION KIT Single Stack Oven P/N 59182 ITEM N O . Q T Y PART NO. DE SCR IPTION 1 4 3101908 LEG 4 ″ AD FT 2 2 48392 INSULATION BOTTOM TRAY 3 1 48394 BOTTOM TRAY WELDMENT 4 1 48396 TOP COVER 5 4 51387 SCREW MSSLT THREAD 8-32 × 1/2, 18-8 6 1 59223 OWNER'S OPERATING & INSTA[...]

SECTION 2 INSTALLATION 9 Figure 2-1 (continued). PS520-Series Gas Oven Installation Parts ITEM N O . Q T Y PART NO. DE SCR IPTION 1 2 48392 INSULATION BOTTOM TRAY 2 1 48394 BOTTOM TRAY WELDMENT 3 1 48396 TOP COVER 4 4 51387 SCREW MSSLT THREAD 8-32 × 1/2, 18-8 5 4 M3828 PIN, ALIGNMENT 6 1 59223 OWNER'S OPERATING & INSTALLATION MANUAL 7 1 2[...]

10 SECTION 2 INSTALLATION 4.00 1 0 1 .6mm Figure 2-5. MODEL PS520 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 PS520 DOUBLE OVEN DIMENSIONS 4.0 0 1 0 1 .6mm 1 The Opening Height is Adjustable from 2-1/4 inch minimum 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 520 TRIPLE OVEN DIMENSIONS 1 The Opening Height is Adjustable from 2-1/4 inch minimum 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 THAT THE OVEN BE PLACED UNDER A VENTILATION HOOD FOR ADEQUATE AIR SUPPLY AND VENTILATION. ELECTRIC SUPPLY TO BE PROVIDED BY CUSTOMER CIRCUIT BREAKER Separate circuit breaker with lockout/tagout electrical shutoff for each oven. Wire eac[...]

14 SECTION 2 INSTALLATION These ‘C’ Channel brackets are installed in the vertical plane using existing screws (Item 6) to support these ‘C’ Channels using the upper and lower Key Hole openings in the ‘C’ Channels. The ‘C’ Channels are identical and once installed will allow ample amounts of air through the cooling fan mounted on th[...]

SECTION 2 INSTALLATION 15 V. GAS SUPPLY CAUTION DURING PRESSURE TESTING NOTE THE FOLLOWING: 1. The oven and its individual shutoff valve must be discon- nected 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 system [...]

16 SECTION 2 INSTALLATION 1. Checking the Gas Supply (Inlet) Pressure a. With the main gas supply valve closed and the circuit breaker/fused disconnect in the OFF (“O”) position, open the inlet pressure tap shown in Figure 2-13 and attach a manometer to the tap. b. Depress the safety switches to allow the oven to operate. c . Open the main gas [...]

SECTION 3 OPERATION 17 SECTION 3 OPERA TION 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 b[...]

18 SECTION 3 OPERATION I I . 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 safet[...]

SECTION 3 OPERATION 19 E. Conveyor The on-off switch for the conveyor motor is on the control panel. Also on the control panel is the digital conveyor 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 through [...]

20 SECTION 3 OPERATION WARNING OVEN MUST BE KEPT CLEAR OF COMBUSTIBLES AT 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 fingers and must stay on duri[...]

SECTION 3 OPERATION 21 Figure 3-6. Control Panel[...]

22 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 procedure. IF THE OVEN WAS SWITCHED OFF FOR LESS THAN 5 MINUTES, WAIT FOR AT LEAST FIVE MINUTES BEFORE RESTARTING THE OVEN. A.Daily Startup Procedu[...]

SECTION 3 OPERATION 23 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). Refer to Qui[...]

24 SECTION 3 OPERATION V. QUICK REFERENCE: TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION The oven temperature ex- ceeded 650°F (343°C), and the burner was automati- cally shut down. • Follow the procedures under Daily Shutdown Procedures in this section to shut down the oven. Contact your Middleby Marshall Authorized Service Agent to determine and c[...]

SECTION 4 MAINTENANCE 25 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 disas- semble or clean the oven with the blower switch or any other part of the oven t[...]

26 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 27 Figure 4-3. II. MAINTENANCE - MONTHLY 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 PS520 Oven note the following: PRECAUTIONS - 1. Do not use excessive water or saturatio[...]

28 SECTION 4 MAINTENANCE 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 29 B. Air Fingers Disassembly For Cleaning 1. As the air fingers are removed use a felt pen to mark all parts of the fingers. This includes the finger 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 from t[...]

30 SECTION 4 MAINTENANCE 6. To remove the inner plate, pull the plate out and then up. Figure 4-11. 7. The outer finger 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. Standar[...]

SECTION 4 MAINTENANCE 31 4. Replace the air fingers 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 fingers the tab on the outer plate must be in the groove as shown in Figure 4-18. There is a blocking [...]

32 SECTION 4 MAINTENANCE 5. Install fingers 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 33 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.[...]

34 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 35 G. Conveyor Belt Link Removal 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[...]

36 SECTION 4 MAINTENANCE H. Attaching Drive Chain 1. If drive sprocket assembly was removed reassemble it into the conveyor drive shaft. Be sure flat 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 37 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: It is recommended that the 3-month mainte- nance be performed by an autho[...]

38 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 production, if a failure occurs.[...]

39 SECTION 5 TROUBLESHOOTING SECTION 5 TROUBLESHOO TING 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 y[...]

SECTION 5 TROUBLESHOOTING 40 NO TES[...]

41 SECTION 6 ELECTRICAL SCHEMATICS SECTION 6 ELECTRICAL SCHEMA TICS Wiring Diagram, G208-240 50/60 GO, PS520G - + + +- - + - + 214 215 401 400 212 213 211 210 240 317 315 206 204 337 335 228 228 333 204 319 317 313 208 208 311 311 307 305 309 307 230 339 339 230 TC1 105 105 103 103 104 104 H2 H1 X2 X1 303 79 68 12 E 687 3 RELAY 1 0 4 2 TB1 G N FILT[...]

SECTION 6 ELECTRICAL SCHEMATICS 42 NOTES[...]

43 SECTION 6 ELECTRICAL SCHEMATICS NOTES[...]

Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • USA • (847)741-3300 • FAX (847)741-4406 www .middleby .com Middleby is proud to support the Commercial Food Equipment Service Association (CFESA). We recognize and applaud CFESA's ongoing efforts to improve the quality of technical service in the industry. W [...]