Middleby Marshall PS528 (Double) User's Manual
Contents
1. ooz N LE YITIOYLNO 2 21 gt a D gt gt 094 Yaddn 2 YJOLON oz SS Y vi EH g g 9 7 e z ON 2 WO z ON 2 WO ON TNVd HI 1298 TUNVd HY 51 ze LSI 8 54 SECTION 7 ELECTRICAL SCHEMATICS NOTES 55 WARNING Improper installation adjustment alteration service or maintenance can cause property damage injury or death Read the installation operating and maintenance instructions thoroughly before installing or servicing this equipment NOTICE During the warranty period ALL parts replacement and servicing should be performed by your Middleby Marshall Authorized Service Agent Service that is performed by parties other than your Middleby Marshall Authorized Service Agent may void your warranty NOTICE Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the manufacturer of all warranty and liability NOTICE Middleby Marshall reserves the right to change specifications at any time CFESA Commercial Food Equipment Service Association Middleby is proud to support the Commercial Food Equipment Service Association CFESA We recognize and appl2. Figure 4 2 Conveyor Belt and Crumb Pan Cleaning Il MAINTENANCE MONTHLY NOTE The oven interior may require cleaning more than once a month depending on the volume of bak ing 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 occur 2 Do not use a caustic oven cleaner or the aluminized finger manifold surfaces will be severely damaged When cleaning your oven first remove all heavy debris with a vacuum cleaner Use a damp cloth for light clean ing For heavier cleaning of baked on grease and carbon deposits use a non caustic cleaner that will not react with SECTION 4 MAINTENANCE the aluminized finger manifold surfaces You can order non caustic cleaner from your local autho rized Middleby Marshall Parts Distributor in the quantities listed below Part Quantity 27170 0244 Case of Quarts 6 27170 0246 Case of Gallons 4 A Removing Conveyor From Oven For Cleaning 1 Remove entry and exit trays 2 Loosen do not remove two screws on housing guard 3 Remove motor housing guard 4 Lift conveyor and remove chain Removable Air Fingers inside baking chamber Console Controls Temperaturer Controller Conveyor Speed Control Conveyor Motor Inside Motor Housing Guard Removable
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5. idd leby PS528 Series Electric Ovens English 7728 Marshall A MIDDLEBY COMPANY owner s operating amp installation manual PS528 Series OVENS Model PS528E Single 2009 Middleby Marshall Inc Part No 63934 Rev B Price 30 00 P 08 09 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 installing or servicing this equipment NOTICE The warranty is NOT VALID unless the oven is installed started and demonstrated under the supervision of a factory authorized installer NOTICE Contact your authorized Service Agency to perform maintenance and repairs A Service Agency Directory is supplied with your oven NOTICE Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the manufacturer of all warranty and liability NOTICE Middleby Marshall Manufacturer reserves the right to change specifications at any time KEEP THIS MANUAL IN A VISIBLE LOCATION NEAR THE OVEN FOR FUTURE REFERENCE Model Serial Installation Date Mod le No Seri No MIDDLEBY MARSHALL No QUIBBLE LIMITED WARRANTY U S A ONLY MIDDLEBY MARSHALL HEREINAFTER REFERRED
6. 47 SECTION 6 PARTS LIST GYVONVLS GaddIHS Q31N3A Nvd 6 5 6L ANNYD Nvd 69787 4 8 ZL HOA3ANOO NOISN31X3 24264 L ZL 9 HOA3ANOO NOISN31X3 08266 L 9 6506 L AN A9Id HOA3ANOO LIM 9109 L vL JAHA 00586 L L YOLOW 3AIHGO 3HO8 91 S M 62862 L3400HdS eresv L 47 14 6 HOA3SANOO 2 1 102 50 NIVHO LIADOYAS 2146 L LL ANIT SZ 99656 L 80 52 YLSVIA CLCLOLE L vol 13345 ASSY 29656 L OL YALSVW ANI 19006 L 6 8L dZ 1 H3 1N3O YILSVIA ANIT 29006 L 8 8L dZ 1 1437 YSLSVW NIT 09006 L 2 9 2 X 81 ILS NLS AYIM 17138 67669 L 9 1188 1 3MA90YdS 8L8vIN OL 6 LAVHS 140689 L v LHVHS S6cc9 L 6 9266 v 4 IN3INQT3M VELLO L L NOILdIYISIO ALO 5 319NIS 49 SECTION 6 PARTS LIST NOTES 50 SECTION 7 ELECTRICAL SCHEMATICS 8 1129 N d 8295 1 09 09 8063 webera Burn SECTION 7 ELECTRICAL SCHEMATICS e INGA WG X 72 X 72 HDLIMS LV3H eL LL 8 2 N AOZ
7. 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 and lockout or tagout all electric power to the oven before attempting to clean or service this oven 15 SECTION 3 OPERATION I COMPONENT INFORMATION AND LOCATION Figures 3 1 and 3 2 A Door Safety Switch The Door Safety Switch is located atthe 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 switch Current is always present B Blower Switch The blower switch has two positions The switch must be ON or I for the main blowers to come on and permit the oven to run The fan circulates the air throughout the oven and must stay on during baking and during the cool down cycle above 200 F 93 C to prevent blower bearing damage To protect the blower motor and bear ings a thermostatic override is built into the oven If the temperature inside the oven is over 180 F 82 C the Temperature Controller Conveyor Speed Digital Control Conveyor Speed Control Module main blower will continue to run after the blower switch is turned to the OFF or O position C Heat Switch Turning the HEAT switch to ON or I
8. Crumb Pan Removable Conveyor Assembly Legs Blower and Cooling Fan Motor Adjustable Eyebrow Figure 4 3 SECTION 4 5 Lift other side of conveyor and push toward other side 6 Remove conveyor as shown Figure 4 6 Figure 4 4 Figure As Figure 4 7 CAUTION Be careful not to bump the drive sprocket while handling the conveyor to avoid damaging the drive shaft B Air Fingers Disassembly For Cleaning 26 1 As the air fingers 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 the front of the oven The marks for an upper oven should be preceded with a U example UB1 UT2 etc Standard Fingers 2 Slide blank plates straight out Figure 4 8 3 Remove air fingers NOTE Some oven users require a custom finger arrange ment where the quantity of air fingers may vary You can remove top and bottom fingers and blank plates from each or either end It is highly recommended that each finger be marked before removing so it is placed in exactly the same position when reassembled refer to step 1 Remo
9. HY 51 zs 51 l 21 11 18L 52 SECTION 7 ELECTRICAL SCHEMATICS 8 01629 N d 826544 09 0S A08b 08 3 dA AIId WdH YOLOW ANOD Y3TIONLNOD YOAJANO OL VA00Z AOZL AYVONOIZS ZH 09 06 A082 072 3 ex MS ANO HILIMS LV3H 6L yee HILIMS 3MO 18 44 N 6E 7 LE 3 2 2 al gt S EOZ 202 204 92 27 3MO1 BR ROBO YOLOW o 3M018 29 6S m g 0 2 46 NV3 adan 100 YOLIV NO YOLON YaMO718 02 56 LM g LON LWD LON A gt 8 9 7 2 hte 2 ON Z 2 ON Z 2 ON 2 TENVd 7aNVd HY 51 zs 51 59 SECTION 7 ELECTRICAL SCHEMATICS 69669 N d 82554 39 09 0S A08 3 dn 5 Dld WdH YOLOW ANO UITIOYLNOI 8 2 VA00Z AOZL AYWONOIJIS 09 06 082 072 zx 6 HILIMS LV3H 7 0 LL HILIMS 3 6E 47 N
10. NOTE Wiring Diagrams are contained in Section 7 of this Manual and are also located inside the oven at the bottom of the Control Panel This Manual Must Be Kept For Future Reference 1 DESCRIPTION Console Controls Temperature Controller Control q i 2 n EEE R ASS was SSS 222 27 SSS N SSS SS RR HS gt 71 Removable Conveyor Asse mbly Removable 905 Crumb Pan End Plugs SECTION 1 DESCRIPTION Il COMPONENT FUNCTION Figure 1 4 Il 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 30 minutes this is the time that a product can take to pass through the oven B Blower Fan The blower fans are located at the rear of the oven These blowers force heated air through the airfingers The BLOWER switch mustbe set to ON or I for oven warmup and baking C Electric Heaters There is one heater element mounted on the inside of the rear panel The element is connected to an electrical control which is energized by the temperature controller D Cooling Fan See Figure 1 5 and Figure 1 6 The cooling fan is located in the back of the oven
11. PARTS LIST SINGLE OVEN EXPLODED 41 RELAY PANEL 5 a aci 43 45 CONTROL 47 SINGLE 49 SECTION 7 ELECTRICAL SCHEMATICS Wiring Diagram E208 240V 50 60 1 PS528 51 Wiring Diagram E208 240V 50 60 3 PS528 52 Wiring Diagram E380 480V 50 60 3 PS528 53 Wiring Diagram E380V 50 60 3 CE PS528 54 NOTE Wiring Diagrams are in Section 7 of this Manual The diagram for each oven is also on the lower inner surface of its Control Console SECTION 1 SECTION 1 DESCRIPTION DESCRIPTION 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 single PS528 Series Oven Figure 1 1 is mounted on a base pad with legs A double oven Figure 1 2 consists oftwo stacked single ovens A triple oven Figure 1 3 consists of three stacked single ovens The lower oven is mounted on a base pad On a double or triple oven the ovens operate independently All ovens use identical controls and components One oven can be cleaned or serviced while the others are operating Figure 1 3 Triple PS528 Oven SE
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13. OVEN MUST BE CLEANED DAILY Clean grille with a stiff nylon type brush 2 Check the air intake of the cooling fan daily The best time to check is right after starting the oven IMPORTANT NOTE The cooling fan operates when the blower switch is turned to ON I It must operate to keep the electrical control cabinet below 140 F 60 C WARNING IF FAN BLADE IS NOT ROTATING BROKEN OR FAN ASSEMBLY IS MISSING FROM MAIN BLOWER MOTOR SHAFT DO NOT OPERATE OVEN REPLACE COOLING FAN BLADE BEFORE OPERATING OVEN Serious damage could be done to the burner blower motor and or solid state electrical components if oven is operated while cooling fan is not running or vent grille is plugged 3 Using a stiff nylon brush clean control compartment vent grille C Conveyor Belt Figure 4 2 Everyday just after starting the oven stand at the un loading end of the conveyor and with a brush remove food particles crumbs etc clinging to the conveyor belt brushing them into the crumb pan 24 D Crumb Pans Figure 4 2 WARNING Crumb pan is extremely hot while oven is operating Allow oven to cool before removing crumb pan When the oven is cool remove and clean the crumb pan at each end of the oven Each crumb pan can be removed by sliding it out as shown in Figure 4 2 Reinstall the crumb pans after cleaning Cooling Fan Grille
14. Thecoolingfan draws airthrough its grille blowing itthrough the blower motor compartment and the control compartments into the oven top and exhausted out the front louvers E Air Fingers and Blank Plates See Figure 1 7 E1 Air Fingers An Air Finger Assembly is made up of three parts 1 Outer Plate The Outer Plate is the removable covering with tapered holes which direct the air stream onto the product being baked 2 Inner Plate The perforated Inner Plate is vital in forming the unique air jets It must be assembled into the manifold with its holes aligned with the holes of the outer plate 3 Manifold The Manifoldis the assembly which slides on tracks into the oven plenum Blower Motor Cooling Fan Blower Assembly Conveyor Drive Motor Right Control Box Figure 1 5 Machinery Compartment Components SECTION 1 DESCRIPTION 1 5 aaa Cooling Fan Grille Figure 1 6 Cooling Fan SECTION 1 DESCRIPTION F2 Blank Plates 1 Blank Plates The Blank Plates are available to install on the plenum where an air finger is not required Half Blank Plate Outer Plate Inner Plate Blank Plate o o _ o 7 Finger Manifold Assembly Baffle Figure 1 7 Blank Plates two sizes and an Air Finger SECTION 2 INSTALLATION SECTION 2 INSTALLATION NOTE The oven when installed must be electrically UNLOADING rounded in accordance with local code
15. or O position 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 WAS SWITCHED OFF FOR LESS THAN 5 MINUTES WAIT FORAT LEAST FIVE MINUTES BEFORE RESTARTING THE OVEN 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 Quick Refer ence Troubleshoot ing in this section Temperature Key Press this key once to view the Actual Temperature in the Display Display Shows the Set Point or the Actual Tem perature in degrees Fahrenheit F or Celsius C Unlock Key Press this key togeth er with the Set Point Key to allow the Set Point to be changed Changes can only be made for 60 seconds Middleby Marshall Up Arrow and Down Arrow Keys Press these keys to adjust the Set Point up or down If the Set Point will not change refer to Set Point Key and Unlock Key in this section 21 SECTION 3 OPERATION HEAT ON Light Lights when the burner is in operation SET PT set point Light Lights when the set point is shown in the display ACTUAL TEMP Light Lights when the Actual Temperature is shown in the display Service Key Service use only Set P
16. will energize the electric heating system This switch is in series with the blower fan motor and high temperature override switch Both switches must be closed before the heating elements an be energized D Temperature Controller The temperature controller is a solid state PID type to maintain the operator set temperature The temperature controller continuously monitors the oven temperature and turns on the modulating solid state relay controller The heat is on for the time required to maintain a constant oven temperature The temperature controller contains a low limit switch which allows the oven to cool down to 200 F 93 C before shutting off the blower A high limit indication ALM 1 will appear on the display if the oven reaches 650 F 343 C Door Safety Switch Conveyor Drive Motor Figure 3 2 Interior View of Control Console 16 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 through the bake chamber of the oven MEASURING CONVEYOR SPEED See Figures 3 4 and 3 5 To check conveyor speed place a product item at the entrance end of baking chamber as shown Time how long it takes for the leading edge of the item to go from t
17. 480V 1 3 58500 Conveyor Drive Motor and Magnet 1 4 60542 Conveyor Speed Control 1 5 33812 5 Thermocouple 1 6 63932 Heater Element 208V 10kW 1 6 61747 Heater Element 208V 12kW 1 6 63933 Heater Element 240V 10kW 1 6 63929 Heater Element 240V 12kW 1 6 63930 Heater Element 380V 12kW 1 6 63931 Heater Element 480V 12kW 1 7 57408 Contactor 1 proper location for the thermocouple is as follows 1 Temperature sensing is located on the entrance end of the unit on the bottom 2 High limit is located on the exit end of the unit on the top 3 High limit on the PS528 is 600 degree s 1 Figure 4 36 36 SECTION 5 TROUBLESHOOTING SECTION 5 TROUBLESHOOTING PROBLEM PRODUCTS ARE OVERCOOKED OR UNDERCOOKED Check for correct setting on tempera ture controller Check for correct setting of conveyor speed control Turn temperature control to correct setting Verify the food preparation process If products still cook incorrectly call your Middleby Marshall Set the conveyor speed control at correct setting Service Agency PROBLEM OVEN DOES NOT HEAT Check to see if both BLOWER switch and HEAT switch are in the ON or I position If oven does not heat call your Middleby Marshall Service Agency PROBLEM BLOWER MOTOR IS RUNNING YET LITTLE OR NO AIR BLOWS FROM AIR FINGERS Air fingers reassembled incorrectly after cleaning Assemble air fingers correctly after cl
18. AS THE SELLER WARRANTS EQUIPMENT MANUFACTURED BY IT TO BE FREE FROM DEFECTS IN MATERIAL AND WORKMANSHIP FOR WHICH IS RESPONSIBLE THE SELLER S OBLIGATION UNDER THIS WARRANTY SHALL BE LIMITED TO REPLACING OR REPAIRING AT SELLER S OPTION WITHOUT CHARGE ANY PART FOUND TO BE DEFECTIVE AND ANY LABOR AND MATERIAL EXPENSE INCURRED BY SELLER IN REPAIRING OR REPLACING SUCH PART SUCH WARRANTY SHALL BE LIMITED TO THE ORIGINAL PURCHASER ONLY AND SHALL BE EFFECTIVE FOR A PERIOD OF ONE YEAR FROM DATE OF ORIGINAL INSTALLATION OR 18 MONTHS FROM DATE OF PURCHASE WHICHEVER IS EARLIER PROVIDED THAT TERMS OF PAYMENT HAVE BEEN FULLY MET This warranty is valid only if the equipment is installed started and demonstrated under the supervision of a factory authorized installer Normal maintenance functions including lubrication cleaning or customer abuse are not covered by this no quibble warranty Seller shall be responsible only for repairs or replacements of defective parts performed by Seller s authorized service personnel Authorized service agencies are located in principal cities throughout the contiguous United States Alaska and Hawaii This warranty is valid in the 50 United States and is void elsewhere unless the product is purchased through Middleby International with warranty included The foregoing warranty is exclusive and in lieu of all other warranties expressed or implied There are no implied warranties of merchant
19. Check that the BLOWER Switch is in the ON 1 position Turn the HEAT 482 BLOWER D and CONVEYOR a switches to the OFF O position Wait for AT LEAST FIVE MINUTES before restarting the oven Repeat the Daily Startup procedure Check that the Set Point is correctly set Check that both the BLOWER gt and HEAT 382 Switches are in the ON 1 position If the oven still will not heat turn the HEAT ES BLOWER 6 and CONVEYOR a switches to the OFF position Wait for AT LEAST FIVE MINUTES before restarting the oven Repeat the Daily Startup procedure Check that the Set Point is above 200 F 93 C Turn the oven to the OFF or O position and allow it to cool Disconnect electrical power to the oven Refer to Section 4 Maintenance for instructions on reassembling the air fingers Turn the oven to the OFF or O position and allow it to cool Disconnect electrical power to the oven Check if the conveyor is blocked by an object inside the oven Refer to Section 4 Maintenance for instructions on checking the conveyor and drive chain tension Check that the set temperature and bake time settings are correct IF THESE STEPS FAIL TO RESOLVE THE PROBLEM CONTACT YOUR LOCAL MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT A SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN 22 SECTION 4 MAINTENANCE WARNING Possibilit
20. Marshall SET PT H 6 wait for MY Middleby 277 Marshal ene Oser er ACTUAL O sP Lock O over temp Turn the HEAT 38 switch to the ON I position and wait for the HEAT ON light to turn on I Middleby 7 9 Marshall ENE O sPtock over temp at Optional Pressthe Tem perature key to show the Actual Temperature in the display and wait for the ACTUAL TEMP lighttoturn on This allows you to monitor the oven temperature as it rises to the setpoint wait for ACTUAL re TEMP Allow the oven to preheat for 10 minutes after it has reached the set point temperature DAILY SHUTDOWN PROCEDURE Turnthe HEAT 4 Ww 2 HEAT BLOWER BLOWER amp switches 9 OFF ON to the OFF O posi I 957 tion Note thatthe blowers will remain in operation until the oven has cooled to below 200 F 93 C Make certain that there conveyor are no products left on the conveyor inside the oven I Turn the CONVEYOR a switch to the OFF position After the oven has cooled and the blowers have turned to the OFF or O position switch the circuit breaker fuse disconnect to the OFF
21. This will match up with the outer edges of the conveyor belt Remember this hook travels backwards on the conveyor Direction of travel Figure 4 30 7 Reconnect the outside master links 8 Replace all parts removed from the oven Figure 4 31 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 EN 4 32 3 The angle plate located on the underside of the con veyor must be against the lower end plug This is true on both sides of oven Vi Crumb Pan Mounting Bracket Lower End Plug Figure 4 33 34 SECTION 4 4 Reattach conveyor guard to control panel and secure Electrical Terminals MO ECON Open the control cabinet door by removing the three Install both upper end plugs screws from the control cabinet door Tighten all electrical control terminal screws including the electrical contactor terminal screws as shown in Figure 4 35 Figure 4 34 Figure 4 35 Ill MAINTENANCE EVERY 3 MONTHS B Ventilation Check that the air circulation throughout the oven is no
22. and 240V 3 phase units have a cord and plug Using flexible cable s for the electrical power supply conductors requires a 2 51mm strain relief fit ting not furnished to enable safe access to the terminal block from which oven power is distributed The supply conductors must be of the size and material copper recommended to provide the current required refer to the data plate for the ampere specifications The electric current rating for each conductor supplying a PS528 Series Oven ranges from a minimum of 16 4 amperes to a maximum of 48 1 amperes Typical specifications for each PS528 Series Oven are 208V or 240V 1 phase 3 wire 10kW this oven requires 60 ampere service A PS528 Series Double Oven Figure 1 2 installation would require two 60 ampere service connections one for each oven the 10kW power consumption also doubles for such an installation to 20kW The 208V or 240VAC electrically heated oven uses two legs of the supplied power to provide 208V or 240VAC power for the oven control circuitry ELECTRICAL Figure 2 11 Junction Connection Box SECTION 2 INSTALLATION NOTES SECTION 3 OPERATION SECTION 3 OPERATION CONTROL FUNCTIONS Blower Heat Temperature Switch Switch Controller ons 8 SSS Conveyor x Speed 5 2 I f SSS SSS A SS IS SSS as HIS SS SSS RSS WSS SSS SSS Conveyor Switch Figure 3 1 PS528 Series Oven Control Functions
23. CTION 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 x 40 75 1035mm W x 21 72 786mm H x Overall Dimension Double Oven 50 00 1270mm L x 40 75 1035mm W x 37 27 947mm H x Overall Dimension Triple Oven 50 00 1270mm L x 40 75 1035mm W x 52 82 1342 H x Weight of Single Oven 250 Ib 93 3kg Shipping Weight 325 Ib 121 3kg Shipping Cube 22 1 ft 0 62 m Operating Range 12 kW hr 3 ph 10kW hr 1ph Maximum Operating Temperature 600 F 316 C Warm up Time 20 min Belt Speed Limits 1 10 minutes SERIES PS1828 ELECTRICAL SPECIFICATIONS Main Blower amp Control Circuit Phase Frequency kW Amperage Poles Wires Elements Voltage Voltage Draw 11 L2 L3 N 208 240V 208 240 3Ph 50 60 Hz 208 12 353 353 333 3 Pole 4 Wire 3 hot 1 grd 3Ph 50 60 Hz 240 12 308 308 288 3 Pole 4 Wire 3 hot 1 grd 380V Export 208 240V 3 Ph 50 60 Hz 380 12 20 2 182 182 20 3Pole 4 Wire 3 hot 1 1 480V 208 240V 3 Ph 50 60 Hz 480 12 16 4 144 144 20 3Pole 4 Wire 3 hot 1neut 1 208 240V 208 240 1 Ph 50 60 Hz 208 10 481 48 1 2 Pole 3 Wire 2 hot 1 grd 1 Ph 50 60 Hz 230 9 2 40 0 40 0 2 Pole 3 Wire 2 hot 1 grd 1 Ph 50 60 Hz 240 10 41 7 41 7 2 Pole 3 Wire 2 hot 1 grd
24. D POSITIONING FOR PS528 SERIES 12 CIRCUIT 2 2 12 ELECTRICAL SPECIFICATIONS 12 ELECTRICAL RATING 12 SUPPLY WIRE eere nnne 12 SUGGESTED u euin egeo di 12 Il VENTILATION GUIDELINES 12 II ELECTRICAL CONNECTION INFORMATION FOR PS528 SERIES OVENS 13 IV ELECTRIC SUPPLY FOR ELECTRIC HEATED 12 SECTION 3 INSTALLATION I CONTROL 5 22 2 15 COMPONENT INFORMATION AND LOCATION 16 A Door Safety Switch 4 2 2 16 B Blower Switch 22 1 16 G 16 D Temperature Controller 16 EN GONVeyor sss 17 MEASURING CONVEYOR SPEED 17 II STEP BY STEP 18 A Startup Procedures 2 2 2 4 1 18 Daily Start p III T 18 18 B Shutdown Procedure 2 18 TABLE OF CONTENTS Continued Page IV NORMAL OPERATION STEP BY STEP 20 A Daily Startup 20 B Daily Shu
25. ION KIT Single and Double Stack Ovens P N 63938 ITEM NO QTY PART NO DESCRIPTION 1 4 3101908 LEG 4 AD FT 2 1 62208 INSULATION BOTTOM TRAY 3 1 62206 BOTTOM TRAY WELDMENT 4 1 61650 TOP COVER 5 4 51387 SCREW MSSLT THREAD 8 32 x 1 2 18 8 6 1 63934 OWNER S OPERATING amp INSTALLATION MANUAL 7 4 62207 INSULATION PARTS LIST FOR SERIES PS528 ELECTRIC OVEN INSTALLATION KIT Triple Stack Oven P N 63939 ITEM NO QTY PART NO DESCRIPTION 1 2 62208 INSULATION BOTTOM TRAY 2 1 62206 BOTTOM TRAY WELDMENT 3 1 61650 TOP COVER 4 4 51387 SCREW MSSLT THREAD 8 32 x 1 2 18 8 5 4 M3828 PIN ALIGNMENT 6 1 63934 OWNER S OPERATING amp INSTALLATION MANUAL 7 4 62207 INSULATION as Figure 2 1 PS528 Series Electric Oven Installation Parts 8 SECTION 2 INSTALLATION Figure 2 5 MODEL PS528 SINGLE OVEN DIMENSIONS 5 82 1182 148mm EXTENTION 50 00 1269mm CONVEYOR 28 09 713mm 18 75 476mm CONVEYOR 4 WITH STANDOFF a 37 79 7020 FRONT LEGS 959mm CENTER 656 5mm TO CENTER 50 00 1269mm OVERALL The Opening Height is Adjustable from 2 1 4 inch minimum to 3 3 4 inch maximum 1 2 inch increments SECTION 2 INSTALLATION Figure 2 6 MODEL PS528 DOUBLE OVEN DIMENSIONS 1182 582 50 00 148 300mm EXTENTION EXTENTION 40 74 1034mm WITH STANDOFFS 34 49 875mm 30 20 FRONT LEGS 3779 Teban a us CENTER 22387 CEN
26. ND JINCHES TO NONCOMBUSTIBEL SIDE WALLS ONLY PS2XX FOR INSTALLATION ON COMBUSTIBLE FLOORS ADJECENT TO COMBUSTIBLE WALLS WITH THE FOLLOWING MINIMUM CLEARENCES CJ INCHES RIGHT SIDE WALL C INCHES TO LEFT SIDE WALL C INCHES TO BACK WALL N INSTALLEZ PAS MOINS DELI PO D UN PANNEAU ARRI RE INCOMBUSTIBLE ET DE PANNEAUX LAT RAUX INCOMBUSTIBLES UNIQUEMENT DESTIN A UN USAGE AUTRE QUE DOMESTIQUE INTENDED FOR OTHER THAN HOUSEHOLD USE ELGIN ILLINOIS 60120 U S A 44957 REVD Figure 2 10 Typical Electric Oven Data Plate SECTION 2 INSTALLATION A fused disconnect switch or a main circuit breaker customer furnished MUST be installed in the electric supply line for each oven it is recommended that this switch circuit breaker have lockout tagout capability The electric supply connection must meet all national and local electrical code requirements Copperis the recommended material for the electrical supply conductors IV ELECTRIC SUPPLY FOR ELECTRICALLY HEATED OVENS Power requirements for electrically heated ovens are usually 208 240VAC 1 phase 3 wire 2 hot 1 ground or 208 240VAC 3 phase 4 wire 3 hot 1 ground although ovens built for export can have power require ments of 380VAC and 480VAC These ovens have a 4 wire system A 1 5 38mm diameter cutout hole in the back of the machinery compartment provides ac cess for the electrical supply connections on 380V and 480V units 208V
27. TER 50 00 1269mm OVERALL The Opening Height is Adjustable from 2 1 4 inch minimum to 3 3 4 inch maximum 1 2 inch increments 10 SECTION 2 INSTALLATION Figure 2 7 MODEL 528 TRIPLE OVEN DIMENSIONS we F 50 00 IUe mm EXTENTION 40 74 1034mm WITH STANDOFFS 3779 6 959mm TO CENTER 6 TO CENTER 5000 OVERALL The Opening Height is Adjustable from 2 1 4 inch minimum to 3 3 4 inch maximum in 1 2 inch increments 11 SECTION 2 INSTALLATION UTILITY ROUGH IN DIMENSIONS AND POSITIONING FOR PS528 SERIES OVENS 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 each oven separately 60 Amp circuit breaker for 208 240V 1ph 50 Amp circuit breaker for 208 240V 3ph or 30 Amp circuit breaker for 380 480V ELECTRICAL SPECIFICATIONS 208V 240V 380V 480V 280V 230V 240V ELEMENT Phase 208 240 208 240 208 240 208 240 208 240 208 240 208 240 50 60 50 60 50 60 50 60 50 60 50 60 50 60 AAA EEN SUPPLY WIRE Supply wire size must be in accord
28. ability or of fitness for a particular purpose The foregoing shall be Seller s sole and exclusive obligation and Buyer s sole and exclusive remedy for any action including breach of contract or negligence no event shall Seller be liable for a sum in excess of the purchase price of the item Seller shall not be liable for any prospective or lost profits of Buyer This warranty is effective on Middleby Marshall equipment sold on or after February 15 1995 2009 Middleby Marshall A Middleby Company Date d installation 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 Seller s factory any part found to be defective and any labor and material expense incurred by Seller in repairing or replacing such part Such warranty is limited to a period of one year from date of original installation or 15 months from date of shipment from Seller s factory whichever is earlier provided that terms of payment have been fully met All labor shall be performed during regular working hours Overtime premium will be charged to the Buyer This warranty is not valid unless equipment is installed started and demonstrated under the supervision of a factory authoriz
29. ance with the National Electrical Code current edition and must be in compli ance with local codes SUGGESTED If space permits service should be located near the control console end of the oven s to allow convenient access to safety switches 12 SS SSSS SSS ZEN Suggested dimensions are shown utility code requirements supersede any factors shown Figure 2 9 Typical PS528 Series Oven s Installation CAUTION UNIT MUST HAVE AIR VENT PLATES INSTALLED OR WARRANTY WILL VOID Il VENTILATION GUIDELINES A mechanically driven ventilation system is recommended for the PS528 Series Middleby Marshall conveyorized electric ovens Local codes and conditions vary greatly from one area to another and must be complied with Following are the sug gested requirements for good ventilation Please remember these are recommendations or guidelines you may have a special condition or problem that will require the services of a ventilation engineer or specialist Proper ventilation is the oven owner s responsibility Improper ventilation can inhibit oven performance Please Note There are now two stand off C Channels that must be installed in the field See Section 6 PARTS LIST page 44 45 for reference Item 5 These Channel brackets are installed the vertical plane using existing screws Item 6 to support these C Channels using the upper and lower Key Hole openings in th
30. aud CFESA s ongoing efforts to improve the quality of technical service in the industry Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 USA 847 741 3300 FAX 847 741 4406 www middleby com lt THE MIDDLEBY CORPORATION
31. e C Channels The C Channels are identical and once installed will allow ample amounts of air through the cooling fan mounted on the rear side of the oven by keeping the oven away from the rear wall If you have any questions about how to mount these two Channel brackets kindly phone Middleby Technical Services at 847 741 3300 Press 3 then 5 for Technical Support Ill ELECTRICAL CONNECTION INFORMATION FOR PS528 SERIES OVENS WARNING Authorized supplier personnel normally accom plish the connections for the ventilation system electric supply as arranged by the customer Following these connections the factory autho rized installer can perform the initial startup of the oven Check the oven data plate Figure 2 10 before making any electric supply connections Electric supply connections must agree with data on the oven data plate NOTE The electric supply installation must satisfy the requirements of the appropriate statutory authority such as the National Electrical Code NEC ANSI NFPA70 U S A the Canadian Electrical Code CSA C22 2 the Australian Code AG601 or other applicable regulations MEM Middleby ZZ Marshall J semA NO 1 ve Jw Jaz James ___ WIRE SERVICE woroRvors ADDITIONAL LOAD VOLTS TomLLOADVOLTS PS5XX DO NOT INSTALL CLOSER THAN 5 TO A NON COMBUSTABLE BACK WALL A
32. e or lost profits of Buyer THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES WHATSO EVER SPECIFICALLY THERE ARE NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE The foregoing shall be Seller s sole and exclusive obligation and Buyer s sole and exclusive remedy for any action whether in breach of contract or negligence In no event shall seller be liable for a sum in excess of the purchase price of the item The Middleby Marshall logo is a registered trademark of Middleby Marshall A Middleby Company Middleby Marshall Inc 1400 Toastmaster Drive Elgin Illinois 60120 9272 U S A 847 741 3300 FAX 847 741 4406 TABLE CONTENTS Page SECTION 1 I MODEL IDENTIFICATION 2 2 22 1 SERIES PS528 ELECTRICAL SPECIFICATIONS 2 Il COMPONENT FUNCTION 424 2 1 2 4 A Conveyor Motor and Conveyor Belt 4 B Bl wer Fan sities 4 Electric Heaters 4 D Cooling Fang uuu u 4 E Air Fingers and Blank Plates See Figure 1 9 4 SECTION 2 1 UNLOADING Uu caste bandit i u 7 PS528 OVEN INSTALLATION REQUIRED KITS AND EQUIPMENT 8 PARTS LIST FOR SERIES PS528 ELECTRIC OVEN INSTALLATION KIT andes rere 8 UTILITY ROUGH IN DIMENSIONS AN
33. eaning Refer to Section 4 procedure or call your Middleby Marshall Service Agency PROBLEM OVEN BLOWER AND CONVEYOR OPERATE YET THE OVEN IS NOT HEATING Reset the temperature controller to a new setting above 200 F after turning the BLOWER switch to off for 30 seconds Start the oven again If the oven still does not heat call your Middleby Marshall Service Agency PROBLEM CONVEYOR WILL NOT HOLD PROPER SPEED OR WILL NOT RUN AT ALL Check whether the conveyor is jammed on something in oven Check for proper tension of conveyor drive chain and conveyor belt Refer to Section 4 for correct procedure Check that the conveyor drive sprocket is tight If conveyor still does not run correctly contact your Middleby Marshall Service Agency PROBLEM OVEN DOES NOT TURN ON WHEN ITS SWITCHES ARE TURNED ON Check that all electric supply switches are set to the or I position Then start the oven If oven still will not start contact your Middleby Marshall Service Agency 37 SECTION 5 TROUBLESHOOTING NOTES 38 SECTION 6 PARTS LIST SECTION 6 PARTS LIST 39 SECTION 6 PARTS LIST SECTION 6 PARTS LIST YOLOW 4 ASSY 298 91 WN 31V 1d3AVN 6 4S8v SL 8 81 Z LXZE 8 GH31 LIS SW HOS 18616 v dOL 09919 eL A18WN3SSV AVAL WOLLOS 90229 LL SaN 14 v 931 806L01
34. ed installer Normal maintenance functions including lubrication adjustment of airflow thermostats door mechanisms microswitches burners and pilot burners and replacement of light bulbs fuses and indicating lights are not covered by warranty Any repairs or replacements of defective parts shall be performed by Seller s authorized service personnel Seller shall not be responsible for any costs incurred if the work is performed by other than Seller s authorized service personnel When returning any part under warranty the part must be intact and complete without evidence of misuse or abuse freight prepaid Seller shall not be liable for consequential damages of any kind which occur during the course of installation of equipment or which result from the use or misuse by Buyer its employees or others of the equipment supplied hereunder Buyer s sole and exclusive remedy against Seller for any breach of the foregoing warranty or otherwise shall be for the repair or replacement of the equipment or parts thereof affected by such breach The foregoing warranty shall be valid and binding upon Seller if and only if Buyer loads operates and maintains the equipment supplied hereunder in accordance with the instruction manual provided to Buyer Seller does not guarantee the process of manufacture by Buyer or the quality of product to be produced by the equipment supplied hereunder and Seller shall not be liable for any prospectiv
35. 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 Master Links Figure 4 24 2 Using long nose pliers unhook master links at left end of conveyor as shown in Figure 4 25 5 Figure 4 25 3 Remove the outside master links on the right and left sides of the conveyor belt as shown in Figure 4 26 Figure 4 26 SECTION 4 MAINTENANCE 4 Unhook the link to be removed 5 Pull up on the belt link section and remove Do not discard the link removed as it may be used for making spare master links NOTE If a section of the conveyor belt is being replaced it should be done now Remove the links that need re placing and use the section of conveyor belt furnished in your installation kit to replace them Figure 4 27 NOTE Before connecting the inside master links notice thatthese links have a correct position Figure 4 28 The link at the right is in the correct horns up position for inserting into the conveyor belt The horns facing down Correct AS Position Incorrect E Position are in the incorrect position Figure 4 28 SECTION 4 6 Reconnect the inside master links Figure 4 29 Figure 4 29 NOTE The outside 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 30
36. g in at the back side Remember to replace them according to the numbers A 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 tab on the outside ofthe groove which will prevent inserting the finger in the groove if the outer plate is moved away from the flange of the finger manifold Figure 4 16 Extended Lip Tab on Outer Plate Flange of Finger Manifold Outer Plate Figure 4 17 29 SECTION 4 5 Install fingers and blank plates correctly with edges interlocked and no space between edges Incorrect Too Much Space Top Finger Blank Plate Tab on Outer Plate of Finger Located in Groove Incorrect Too Top Finger Much Space Blank Plate Tab on Outer Plate of Finger Located in Groove Correct Edges Top Finger Overlap Com Blank Plate Tab on Outer Plate of Finger Located in Groove Figure 4 18 30 SECTION 4 MAINTENANCE 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 Removable Air Fingers inside baking chamber Console Cont
37. he entrance end of the baking chamber to the exit end This should be the conveyor speed shown on the con veyor speed digital control NOTE In Figures 3 4 and 3 5 the oven shown is with the conveyor running right to left WARNING Possibility of injury from rotating parts and electrical shock exist in this oven Never disassemble or clean the oven with the blower switch or any other part of the oven turned or I Turn OFF or O and lock out or tagout all electrical power to the oven before attempting to clean or service this oven SECTION 3 OPERATION _ Minutes Seconds Figure 3 3 Conveyor Speed Digital Control ma Figure 3 4 Product at entrance end of baking chamber BEGINNING OF TIMING Figure 3 5 Product at exit end of baking chamber END OF TIMING SECTION 3 OPERATION WARNING OVEN MUST BE KEPT CLEAR OF COMBUSTIBLES AT ALL TIMES II 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 during the cooking or baking process 2 Check to see if the cooling fans See Figure 1 8 are operating when the blower switch see Figure 3 6 is turned ON or l The cooling fans cool the control components and blower motor The c
38. oint Key Press this key togeth er with the Unlock Key to allow the Set Point to be changed Changes can only be made for 60 seconds SECTION 3 OPERATION V QUICK REFERENCE TROUBLESHOOTING SYMPTOM OVERTEMP light is lit food product is undercooked PROBLEM The oven temperature ex ceeded 650 F 343 C and the burner was automatically shut down Oven will not turn on at all Electrical power may not be reaching the oven or the controls may be set incorrectly L l r IL appears in display oven is not heating The oven did not reach 200 F 93 C within 15 min utes of startup and the oven has stopped heating Oven will not heat Controls may be set incor rectly Oven is operating but little or no air is blowing from air fingers Air fingers may have been reassembled incorrectly after cleaning Conveyor moves with a jerky motion or will not move at all Conveyor may be jammed on an object in the oven or conveyor belt or drive chain tension may be incorrect Food products are over cooked or undercooked Controls may be set incorrectly SOLUTION 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 correct the cause of the condition to prevent damage to the oven Check that the circuit breaker fused disconnect is turned on
39. ooling fans located at the rear of the oven blows air into and through the cabinet Air is exhausted through the front of the cabinet and also out the front of the oven Refer to Daily Maintenance Section for fan intake checking procedure IMPORTANT NOTE The cooling fan operates when the BLOWER switch is turned ON or I It must operate to keep the control console below 140 F 60 C 3 Turnthe CONVEYOR switch Figure 3 6 to the ON or I position This starts the conveyor belt moving through the oven Set the conveyor speed for the desired baking time Refer to the following Procedures E F and G 18 4 Set the temperature controller to the desired baking temperature NOTE For complete temperature controller operation instructions refer to Step C 5 Turn the HEAT switch Figure 3 6 to the ON or I position This completes a circuit to supply electric power to the electric heating system 6 Ovenwill reach abakingtemperature of 500 F 232 C in approximately 20 minutes Allow the oven to cycle for 30 minutes after it has reached desired bake temperature The oven is now ready for baking Power Failure In case of power failure turn off all switches and remove product After power has been reestablished follow normal startup procedure B Shutdown Procedure 1 Turn the BLOWER and HEAT switches to OFF or O NOTE The blowers will remain on until the oven tem perature cool
40. rols Blower and Cooling Temperaturer Fan Motor Controller Conveyor Speed Control Conveyor Motor Inside Motor Housing Guard Removable Adjustable Crumb Pan Removable ie Eyebrow Conveyor Assembly Figure 4 20 31 SECTION 4 MAINTENANCE E Conveyor Reassembly Into Oven F Checking Conveyor Belt Tension 1 Lift conveyor and position it in oven as shown ee WARNING NOTE Conveyor may be inserted into either end of oven If it is to be installed from the non drive end of the oven Oven conveyor belt must be cool when adjusting the drive sprocket assembly must be removed as shown belt Do not adjust belt if HOT in conveyor disassembly section 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 to 2 75mm to 102mm 2 If conveyor belt is still not under proper tension an entire link must be removed Use the following procedure H Conveyor Belt Link Removal to remove a link If conveyor belt is under proper tension proceed directly X to J Attaching Drive Chain Figure 4 21 2 Reinstall the conveyor extension oo s RANKS Conveyor Extension Figure 4 23 Figure 4 22 32 G Conveyor Belt Link Removal 1 Using long nose pliers an
41. s or inthe absence codes with the National Electrical Code NEC Your Middleby Marshall PS528 Series Oven is shipped or ANSI NEPA70 partially assembled It will arrive in a carton on a crate The crate and carton must be examined before signing the Bill of Lading Report any visible damage to the transport NOTE company and check for the proper number of crates If There must be adequate clearance between apparent damage is found make arrangements to file a the oven and any adjacent combustible con claim against the carrier Surface Interstate Commerce struction Clearance must also be provided Regulations U S A require that the claim must be for servicing and for operation initiated by the consignee within 10 days from the date that the shipment is received CAUTION It is recommended thatthe oven be placed under a ventilation hood for adequate air supply and ventilation CAUTION Do not obstruct the flow of ventilation air to and from your oven Do not obstruct the fan holes in the rear of the unit CAUTION Onovens with the Machinery Drive Compartment located at the right end a minimum clearance of 0 to a left side wall 18 to a right side wall and 6 from a back wall to air openings at the rear of the oven must be maintained For servicing and cleaning a minimum of 18 clearance from all walls is recommended SECTION 2 INSTALLATION PARTS LIST FOR SERIES PS528 ELECTRIC OVEN INSTALLAT
42. s down to 200 F 93 C at which time they will stop automatically 2 Make certain that there are no products left on the conveyor inside the oven Turn the CONVEYOR switch to OFF or SECTION 3 OPERATION TEMPERATURE ON 88 OFF 2 BLOWER Nd 2 O HEAT ON CONVEYOR O ACTUAL TEMP O sP Lock OVER TEMP Figure 3 6 Control Panel 19 SECTION 3 OPERATION IV NORMAL OPERATION STEP BY STEP A Daily Startup Procedure 1 Check that the circuit breaker fused disconnect is in the on position Wait for the oven to heat to the setpoint temperature Higher setpoint temperatures will require a longer wait The oven can reach a temperature of 500 F 232 C in approximately 15 minutes Turn the BLOWER switch to the ON 1 position BLOWER N OFF Turnthe CONVEYOR gt switch to the ON 1 position CONVEYOR OFF ON If necessary adjust the conveyor speed setting by pressing the or pushbuttons on the conveyor speed controller to change the displayed bake time Adjust the temperature controller to a desired settemperature ifneces sary Press the Set Point and Unlock keys at the same time Wait forthe SET PT light to turn on Press the Up Arrow and Down Arrow Keys as necessary to adjust the set point MIN SEC or Middleby 4
43. t blocked and is working properly WARNING Shut OFF all electrical power and lock tag out the switch before attempting maintenance work IV MAINTENANCE EVERY 6 MONTHS A Check brushes on D C conveyor motor when worn NOTE Itis recommended thatthe 3 month maintenance to less than 1 10 2 4mm replace the brushes be performed by an authorized Middleby Marshall B Check your oven venting system technician IMPORTANT NOTICES Installation of replacement parts requiring access to the interior of the oven is permitted only by an authorized service technician f there are any problems with the operation of the oven the authorized service technician must be called tis suggested to obtain a service contract with a manufacturer s authorized service technician 35 SECTION 4 KEY SPARE PARTS KIT An oven can be purchased with a Key Spare Parts Kit parts that can reduce serious downtime and loss of pro Figure 4 36 The kit can be purchased when the oven duction if a failure occurs is ordered or later from a Middleby Marshall Authorized Parts Distributor The kit contains many of the crucial EI PIE Middleby Marshall Authorized Parts Distributor PS528 SERIES ELECTRIC OVEN KEY SPARE PARTS KIT Figure 4 36 ITEM PART NO ENGLISH DESCRIPTION QUANTITY 1 47321 Kit Temperature Control On Off Pid 1 2 44914 Controller 208 240V 1 2 44658 Controller 380
44. tdown Procedure 20 V QUICK REFERENCE TROUBLESHOOTING 22 SECTION 4 MAINTENANCE I MAINTENANCE 24 As Ext rior zu aus 24 B Cooling 24 C Conveyor Belt 2222 24 D Crumb Pans 20 2 2 24 Il MAINTENANCE 25 A Removing Conveyor From Oven For Cleaning 25 Air Fingers Disassembly For Cleaning 27 Reassembly of Air 28 D Reinstall End Plugs 31 E Conveyor Reassembly Into Oven 32 F Checking Conveyor Belt Tension 32 G Conveyor Belt Link Remowval 33 H Attaching Drive Chain 34 Ill MAINTENANCE EVERY 3 MONTHS 35 A Electrical Terminals eee 35 B Ventilation u u u u 35 IV MAINTENANCE EVERY 6 MONTHS 35 PS528 SERIES ELECTRIC OVEN KEY SPARE PARTS am 36 KEY SPARE PARTS KIT 36 SECTION 5 TROUBLESHOOTING Troubleshooting 22 37 SECTION 6
45. ve the air fingers pull the finger at the back side pull straight out 27 SECTION 4 MAINTENANCE Figure 4 9 4 With air fingers out place them in an upright position to remove the outer plate 5 Gently step on the lip of the finger and pull the outer plate off Figure 4 10 SECTION 4 6 remove the inner plate pull the plate out and then up C Reassembly of Air Fingers 1 Air fingers are made up of one inner plate one outer plate and the finger housing manifold Be sure to match up the markings T1 2 T3 etc on all the parts of the air fingers as you are reassembling 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 14 2 Reassemble the inner plate Keep your fingers clear so you won t pinch them The inner plate of a finger will only go in one way because of its design 3 Replace the outer plate by placing your hands flat on the top of the plate and pushing down Keep your fingers clear so you won t pinch them Figure 4 12 Standard Lower Finger Figure 4 15 Figure 4 13 Standard Upper Finger 28 SECTION 4 4 Replace the air fingers by pushin
46. y 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 disas semble clean or service oven s Never disassemble or clean the oven with the blower switch or any other part of the oven turned on WARNING Before performing any maintenance work or cleaning turn main power switch off CAUTION When cleaning do not use any abrasive cleaning materials or water spray wipe clean only Never use a water hose or pressurized steam cleaning equipment when cleaning this oven NOTICE If the oven is to be removed from its installed location for servicing perform the following procedure 1 Switch off the oven and allow it to cool Do NOT service the oven while it is warm Turn off main circuit breakers and disconnect con nector from oven Move oven to desired location for servicing When servicing is complete move oven to original location Adjust legs to level oven Connect electrical connectors to oven Turn main circuit breakers Follow normal startup instructions 23 SECTION 4 MAINTENANCE SECTION 4 MAINTENANCE 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
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