Karcher Oven PS640G User's Manual
Contents
1. 7 Marshalt WOW OVEN The Middleby Corporation 450 F BELT 01 SPEED 4m 30s OU 2 Push the ON OFF button to start the oven The con troller will display the screen as shown in Figure 3 3 Figure 3 3 Main Screen ON Zya eby 77748 Marshall WOW OVEN FRONT BELT JAMMED 450 F BELT 01 SPEED 4m 30s ES ON OFF button 3 Tochange the temperature push the TEMP button The controller will display the screen shown in Figure 3 4 To change the temperature push the e arrow button Then push either the T arrow or L arrow buttons to increase or decrease temperatures respec tively When the proper temperature is entered push the Enter Reset button The controller will now show the display shown in Figure 3 3 Figure 3 4 Temperature Screen V Middleby 77248 Marshall WOW OVEN TEMPERATURE SET UP ACTUAL TEMP 133 8 F 450 0 F O4 A4 bJ 9 TEMP Set button ON OFF button To change the conveyor belt speed push the TIME button The controller will display the screen shown in Figure 3 5 To change the minute setting push the arrow button Then push either the T arrow or J arrow buttons to increase or decrease the time accordingly To change the second setting push the arrow button Then push either the T arrow or J arrow buttons to increase or decrease the time accordingly When the proper times are entered push the2. PS640 Triple Gas Oven PARTS LIST FOR SERIES PS640 GAS OVEN INSTALLATION KIT P N 51100 Two required for double oven Three required for triple oven ITEM NO QTY PART NO DESCRIPTION 1 1 22361 0001 FLEXIBLE GAS HOSE 2 1 55028 CONVEYOR END STOP 3 1 55027 CONVEYOR LEFT REAR STOP 4 1 42612 SERVICE AGENCY DIRECTORY 5 1 22500 0080 LABEL MM 6 1 51054 ASSY HANDLE 8 DOOR Figure 2 1 PS640 Series Gas Oven Installation Parts Figure 2 2 Model PS640 Single Oven Option Base with Legs and Top HARDWARE BAG 5 6 7 10 8 11 e 00 6 e PARTS LIST FOR PS640 SERIES SINGLE OVEN OPTION BASE w 15 LEGS amp TOP ITEM NO 1 Oo Oc N O OA A W N a O P N 59720 QTY PART NO DESCRIPTION 1 60287 COMPLETE BASE WELDMENT 4 37900 0024 TOP PLATE LEG WELDMENT 2 22290 0009 SWIVEL CASTER W BRAKE FLAT PLATE 2 22290 0010 SWIVEL CASTER FLAT PLATE 32 220373 3 8 16 x 1 HEX SCREW SST 32 21416 0001 3 8 FLAT WASHER SS 32 21422 0001 3 8 SPLIT LOCK WASHER ZP 1 22450 0228 RESTRAINT CABLE ASSEMBLY 1 59560 TOP COVER 2 59677 SCR MS SL TR HD 10 32 x 2 1 2 2 7A2815 SCR MS STR TRSHD 10 32 x 3 4 Figure 2 3 Model PS640 Double Oven Option Base with Legs and Top e HARDWARE BAG O s 3 5 6 7 10 amp 11 S PARTS LIST FOR PS640 SERIES DOUBLE OVEN OPTION BASE w 6 LEGS 8 TOP ITEM NO 1 Oo Oc N OO oa A W N a O P N 59725 QTY PART NO DESCRIPTION 1 60287 COMPLETE BASE WELDMENT 4 37900 0102 TOP
3. 1 gd Table 1 4 Gas orifice and pressure specifications for PS640G gas ovens Gas Main Orifice I D Supply Inlet Orifice Manifold Bypass Type PS640G Pressure Pressure Pressure Natural 0 120 6 12 W C 14 9 29mbar 3 5 W C 8 7mbar 0 2 W C 0 015 mbar Propane 1 9mm 11 14 W C 27 4 34 9mbar 10 0 W C 24 9mbar 0 5 W C 0 12 mbar IMPORTANT Additional electrical information is provided on the oven s serial plate and on the wiring diagram inside the machinery compartment GAS ORIFICE AND PRESSURE SPECIFICATIONS PER OVEN CAVITY CE OVENS Supply Inlet Pressure IT PT ES SE Main UK CH IT AT SE CH AT DK BE IE IT PT Orifice Rated Gas Orifice DK FI NL DE BE FR FI DE NL ES UK Manifold Heat Type dia Lu K t l t Lu b p Pressure Input G20 0 120 20 20 20 11 21 22 36 A 3 05 MM mbar mbar mbar iar KWhr G25 0 120 25 16 19 22 36 MES 305 mm mbar iar KWEN G30 0 075 29 or 50 28 30 37 26 2 22 59 1 9 mm mbar or 50 mbar mbar kW hr Wiring Diagrams are contained in Section 5 of this Manual and are also located inside the oven at the bottom of the Control Panel Additional electrical information is provided on the oven s serial plate This Manual Must Be Kept For Future Reference SECTION 2 INSTALLATION WARNING After any conversions readjustments or service work on the oven e Perform a gas leak test e Test for proper combusti
4. the manual shutoff valve must remain open except during pressure testing as outlined in the above steps or when necessary during service maintenance A Gas Utility Rough In Recommendations The following gas system specifications are STRONGLY RECOMMENDED Deviating from these recommendations may affect the baking performance of the oven Gas Meter e One or two cavities 750 cfh meter e Three oven cavities 1200 cfh meter Gas Line e DEDICATED LINE from the gas meter to the oven e 2 50 8mm pipe for natural gas e 2 50 8mm pipe for propane e Maximum length 2002 61m Each 90 elbow equals 7 2 13m of pipe B Connection Check the oven s gas supply requirements before making the gas utility connection Gas supply requirement are listed on the oven s serial plate and in Table 1 4 Gas Orifice and Pressure Specifications in Section 1 Description Check the serial plate to determine the type of gas Propane or Natural to be used with the oven Refer to the instructions in the gas hose package included in the Installation Kit before connecting the gas line One gas line connection method is shown in Figure 2 18 however compliance with the applicable standards and regulations is mandatory Inlet regulated and pilot gas pressure readings can be taken using a digital tube manometer at the tap location shown in Figure 2 19 Figure 2 19 shows the burner assembly and Figure 2 21 shows the gas valve NOTE The inst
5. shaft Cleanthe shafts thoroughly using a rag Then lubri cate both the extended shaft and the interior of the hollow shaft using a light food grade lubricant DO NOT lubricate the shafts using WD40 or a similar product This can cause the shafts to wear rapidly Before reassembling the shafts into the conveyor frame check that they are oriented properly Figure 4 4 Disassembling the idler shaft 22 10 11 12 13 14 16 17 18 19 Reassemble the idler shaft into the conveyor Make sure that the bronze washer is in place between the two sections of the shaft See Figure 4 4 Replace the conveyor adjustment screws as shown in Figure 4 4 To allow the conveyor belt to be reinstalled later do not tighten the screws at this time Loosen the set screw on both of the conveyor drive sprockets Then remove the sprockets from the shaft Check the conveyor configuration as follows High speed conveyors are equipped with large flange bearings at both ends of the shaft as shown in Figure 4 5 For these conveyors remove the two screws that hold each bearing to the conveyor frame With the screws removed lift the end of the shaft at the front of the oven and pull the entire assembly free of the conveyor frame Standard conveyors are equipped with bronze bush ings mounted on spacers at both ends of the shaft as shown in Figure 4 5 For these convey ors remove the two screws that hold the bracket to t
6. the cover where the photo eye assembly will be positioned Secure the photo eye assembly in position with the two screws Place the photo eye cover on the opposite control box where the photo eye assembly was removed and secure the two screws Secure the access door with the three screws Hemove the three screws securing the access door on the opposite side Open the access door where the photo eye is now positioned and connect the photo eye connector fitting Secure the access door with the three screws Apply power to the unit Adjust the photo eye height by loosen ing the two screws securing the photo eye assembly and sliding the photo eye assembly either up or down such that the beam is approximately 1 4 inch above the belt Note This is MUCH easier in reduced light Replace all covers VI ELECTRICAL SUPPLY WARNING AN NOTE The electric supply installation must satisfy the re quirements of the appropriate statutory authority such as the National Electrical Code CSA C22 2 the Aus tralian Code AG601 or other applicable regulations Authorized installation personnel normally accomplish the connections for the ventila tion system electric supply and gas supply asarranged bythe customer Following these connections the factory authorized installer can perform the initial startup of the oven NOTE The electric supply connection must meet all national and local electrical code requirements Check the ove
7. 32 x 2 1 2 screws Figure 2 11 Installing the Restraint Cable Restraint cable assembly 3 8 18 x 1 eyebolt on rear leg extension 3 4 19mm eyebolt Wall of structure D Conveyor Installation 1 Unfold the conveyor as shown in Figure 2 12 Then begin to slide the conveyor into the end of the oven The conveyor can only be installed from the end of the oven with the drive motor 2 Continue moving the conveyor into the oven until the frame protrudes equally from each end of the oven Check that the crumb tray supports located on the under side of the conveyor frame rest firmly against the lower end plugs as shown in Figure 2 13 3 When the conveyor is positioned properly check for freedom of movement of the conveyor belt by pulling it for about 2 3 feet 0 6 1 0m with your fingers The drive and idler shafts must rotate smoothly and the belt must move freely without rubbing on the inside of the oven 4 Check the tension of the conveyor belt as shown in Figure 2 14 The belt should lift about 1 25mm DO NOT OVERTIGHTEN THE CONVEYOR BELT NOTE f necessary the belt tension can be adjusted by turning the conveyor adjustment screws located at the idler non control end of the conveyor See Figure 2 14 Figure 2 12 Conveyor installation Idler end with belt tension adjustment screws Drive end with drive sprocket Figure 2 13 Conveyor placement Crumb tray su
8. 41 3300 FAX 847 741 4406 www middleby com o Middleby 7728 Marshall THE MIDDLEBY CORPORATION
9. 9 60091 59132 59668 48455 50240 Figure 4 8 Key Spare Parts KEY SPARE PARTS PS640 GAS B amp W Touchscreen DESCRIPTION Digital Display Programmed Motor Conveyor Drive Conveyor Control Board Inverter Programmed Power Supply Kit Thermocouple Fan Cooling Control Fan Cooling Rear Air Switch Motor Blower Ignition Module Assy Valve Gas Modulating Board Signal Cond 0 15VDC High Limit Control Module 240V Transformer 240Vp 24Vs PLC Module Programmed Thermocouple Module Current Module PhotoCell Relay DPDT 24V Coil Belt Blower Ignitor Single Rod Ignition Cable 25 24 9v Aou vaE6s eseyd L ZH 09 0S HOA 02 8075 1equinN epo reuse u Aqe ppiw SECTION 5 WIRING DIAGRAM ON9 LE BE an EE n Y WA H SN3S VAS9 n ann z1 MOLLINDI A7Z AMYONODIFS a yen m a ZH 09 05 NOYZ AYVWIYd L W aX vi 983 VAS9 FTNGOW AMINO 1139 LNd A7Z AHY NOO3S S ER NOLLINSI ZH 09 05 l LTOV Od A07Z ANVHiid a avon FATVA GOW g ZYNIX ui MaINYNg d s gt K 8600LW 76 Jav H31N3 HY HH 6 709 Z 1133010Hd 30 ZOEZ laa Ja ZzOEZ 1H I HdaldlldWV VNBIS Z ME n 05 909 I INANI 1NdLNO ANNI W3TIO0HLNOO L 83 TIO81NO2 JVA7Z J3UA0Z 0 VWOZ 7 aIJINI HT Y L TIZDJOLOHd L AV IF O QO Q O Q O Bas 1 mn 7104 LNOD NVA DNI1002 O IEZSU OZEZSM WO2 Ave o m V SX7LJ 0d4 aaz OOOO ou RS amp NO 70 ND TEZI YSLYSANI Q O O O O
10. Actual temperature Indicates current average tempera ture of the right side of the oven Set point temperature Pressing on this value allows the user to adjust the set point of the oven Exit Returns to the main screen Energy Modes Energy Mode One This mode is automatic and starts bake time 1 minute after the last product has entered the oven In this mode the main oven blowers will lower to 1200 RPM while the oven maintains temperature and belt speed Ill QUICK REFERENCE TROUBLESHOOTING SYMPTOM Oven will not turn On Oven will not heat Oven is operating but little or no air is coming from the fingers Conveyor will not move IV SCREEN ALERTS SYMPTOM Battery Symbol in the lower right hand corner High Control Compartment Temperature Belt off Oven not in temperature PROBLEM No electrical power No gas pressure Burner did not light Air fingers may be as sembled incorrectly after cleaning Oven is not up to operating temperature Conveyor may be jammed Startup Sensor faulty or sensor window dirty PROBLEM The internal battery needs to be replaced to retain en ergy mode timings Thermocouple or PLC malfunction Normal operation until Oven reaches operating temperature 19 SOLUTION Check that the circuit breaker fused disconnect is on Make sure the emergenct stop button is on Make sure main gas is on Turn oven off and restart If it still does no
11. CY TELEPHONE NUMBER OF YOUR LOCAL GAS SUPPLIER AND INSTRUCTIONS TO BE FOLLOWED IN THE EVENT YOU SMELL GAS Instructions to be followed in the event the user smells gas shall be obtained by consulting the local gas supplier If the smell of gas is detected immediately call the emergency phone number of your local Gas Company They will have personnel and provisions available to correct the problem 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 instruc tions thoroughly before installing or servicing this equipment IMPORTANT An electrical wiring diagram for the oven is located inside the machinery compartment IMPORTANT It is the customer s responsibility to report any concealed or non concealed damage to the freight company Retain all shipping materials until it is certain that the equipment has not suffered concealed shipping damage NOTICE CONTACT YOUR MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT TO INSTALL AND PERFORM MAINENANCE AND REPAIRS AND IF NECESSARY TO CONVERT EQUIPMENT FOR USE WITH OTHER GASES AN AUTHORIZED SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN NOTICE Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the manu
12. E All aspects of the oven installation including placement utility connections and ventilation requirements must conform with any applicable local national or international codes These codes supersede the requirements and guidelines provided in this manual NOTE In the USA the oven installation must conform to local codes In the absence of local codes gas oven installations must conform with the National Fuel Gas Code ANSI Z223 1 Gas and electric ovens when installed must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code NEC or ANSI NFPATO NOTE In Canada the oven installation must conform with local codes In the absence of local codes gas oven installations must conform with the Natural Gas Installation Code CAN CGA B149 1 or the Propane Gas Installation Code CAN CGA B149 2 as applicable Gas and electric ovens when installed must be electrically grounded in accordance with local codes or in the absence of local codes with the Canadian Electrical Code CSA C222 PS640 OVEN INSTALLATION REQUIRED KITS AND EQUIPMENT PS640 PS640 PS640 PS640 Gas Oven Single Oven DoubleOven TripleOven Installation Option Base w OptionBase w OptionBase w TYPE OF INSTALLATION Kit 15 Legs 6 Legs Casters amp Top Casters amp Top Casters amp Top Kit Kit Kit P N51100 P N59720 P N59725 P N59726 PS640SingleGasOven Ft PS640DoubleGasOven 2 2 J 3 pt a
13. ENTER RESET but ton The controller will now show the display shown in Figure 3 3 Figure 3 5 Belt Speed Screen Message Bar Zy niod eby 7774 Marshall WOW OVEN BELT 01 SPEED LEFT FOR MINUTES RIGHT FOR SECONDS 4m 30s 14 J kage TEMP button TIME button Daily Startup Procedure Check thatthe circuit breaker fused disconnectis in the On position Check that the window is closed The touch panel display should be lit Adjust the conveyor to the desired bake time Press the temperature button to display the oven setting Set temperature as desired Press the ON button to activate the oven The conveyor will not run until the oven temperature has reached the set points 18 Daily Shutdown Procedure Make certain there are no products left on the conveyor in the oven Press the ON OFF button to turn the oven off Open the window to allow the oven to cool faster After the oven has cooled and the blowers have turned off the circuit breaker fused disconnect may be turned off Quick Reference Touch Screen Controller Main Screen ON OFF button Used to turn oven On and Off TIME See Separate Instructions TEMP See Separate Instructions Energy level indicators Indicators to either side of the screen indicate the energy input to that side of the oven Message bar Indicates various messages pertaining to current oven conditions Oven Temperature Set Point Indicator Screen
14. MMEDIATELY Operating the oven i A without adequate cooling can seriously damage the oven s internal components E Clean the conveyor belts with a stiff nylon brush This is more easily accomplished by allowing the conveyor to run while you stand at the exit end of the conveyor Then brush the crumbs off the conveyor as it moves F Remove and clean the crumb trays If necessary refer to Figure 2 16 in Section 2 Installation when replacing the crumb trays into the oven G Clean the window in place Fan grills 2 on rear Vent 1 on rear of oven and control of machinery compartment compartment 20 Il MAINTENANCE MONTHLY NOTE When removing the conveyor refer to Figure 2 12 in Section 2 Installation A Check that the oven is cool and the power is disconnected as described in the warning at the beginning of this Section B Remove the crumb trays from the oven C Lift the drive end of the conveyor slightly and push it forward into the oven This removes the tension from the drive chain Then remove the drive chain from the con veyor sprocket D Slidethe conveyor out of the oven folding it as itis removed NOTE Split belt conveyors can only be removed from the end of the oven with the drive motor Single belt conveyor assemblies may be removed from either end of the oven If itis to be removed from the end of the oven without drive motor remove the drive motor sprocket as described in the Conveyor In
15. Middleby 7728 Marshall Increase A Main On Off Button D TEMP Set Left E Message Bar Decrease B Conveyor Time Setting Right LOCATION AND DESCRIPTION OF CONTROLS A Main On Off Button Turns all oven functions on or off If the oven is below the set point it will rise to the set point and turn the conveyor on If it is turned off and the oven is above 200 F the blowers will remain on until the oven drops below 200 F B Conveyor Time Setting Adjusts and displays the conveyor bake time Dual belt ovens have two displays single units have one 16 C Temperature Control Display Displays the set point of the oven D TEMP Set Pressing on the TEMP button shows individual displays and combined adjustments E Message Bar Indicates various messages pertaining to current oven conditions NORMAL OPERATION STEP BY STEP A Main Screen b When the unit has been OFF for more than 1 minute the controller will display the screen saver as shown in Figure 3 1 To start operation push the Enter Reset button The controller will display the OFF screen as shown in Figure 3 2 Figure 3 1 Screen Saver WOW OVEN PAM ddleby 77748 Marshall yon Middleby 77245 Marshall The Middleby Corporation 1400 Toastmaster Drive Hgin IL 60120 Phone 847 741 3300 Fax 847 741 0015 2005 Middleby Corporation All rights reserved OU i Figure 3 2 Main Screen OFF
16. O O ZL W zl Q 7 N SJ A YOLOW NVA DN 100D AV 1dSIQ OE 1D LIVM 09 90A7C AlddnS YAMOd ana anD ie WI TD 1431 1HOhi m m LON H31N3D MV3H L WOD zs 7I1 0d3 v6 2a aa LWN H IH D I 4ood H1 z B 2 9a gas B inaewy eie 3oMiNO3 F 30u1NO2 1H97 NIJD 21 NIL z ane JHE 4311S SVO IJ ZIL NOTES 26 NOTES 27 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 applaud CFESA s ongoing efforts to improve the quality of technical service in the industry Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 e USA e 847 7
17. PLATE LEG WELDMENT 2 22290 0009 SWIVEL CASTER W BRAKE FLAT PLATE 2 22290 0010 SWIVEL CASTER FLAT PLATE 32 220373 3 8 16 x 13 HEX SCREW SST 32 21416 0001 3 8 FLAT WASHER SS 32 21422 0001 3 8 SPLIT LOCK WASHER ZP 1 22450 0228 RESTRAINT CABLE ASSEMBLY 1 59560 TOP COVER 2 59677 SCR MS SL TR HD 10 32 x 2 1 2 2 7A2815 SCR MS STR TRSHD 10 32 x 3 4 HARDWARE BAG 1 0 9 T0 11 12 13 14 amp 17 Figure 2 4 Model PS640 Triple Oven Option Base with Outriggers and Top 1 15 PARTS LIST FOR PS640 SERIES TRIPLE OVEN OPTION BASE w CASTERS amp TOP ITEM NO 1 O N O OF A CQ N 11 12 13 14 15 16 17 O N N O O OO P N 59726 PART NO DESCRIPTION 60287 COMPLETE BASE WELDMENT 45209 QUAD OUTRIGGER WELDMENT 22290 0009 SWIVEL CASTER W BRAKE FLAT PLATE 22290 0010 SWIVEL CASTER FLAT PLATE 45206 INSERT QUAD ADJUSTMENT FOOT 45205 SPACER QUAD CASTER A27727 3 83 16x1 1 4 HEX BOLT A21924 3 83 FLAT WASHER SS 21422 0001 3 83 SPLIT LOCK WASHER ZP 21172 0004 3 83 16 NYLON INSULATED LOCKNUT ZC 2001048 1 23 13 x 1 3 8 18 8 HEX CAPSCREW A27750 1 23 18 8 FLAT WASHER 21422 0016 1 23 18 8 LOCK WASHER 59677 SCR MS SL TR HD 10 32X2 1 2 22450 0228 RESTRAINT CABLE ASSEMBLY 59560 TOP COVER 7A2815 SCR MS STR TRSHD 10 32X3 4 Ill VENTILATION SYSTEM IMPORTANT Where national or local codes re quire the installation of fire sup pression equipment or other supplementary equipment DO NOT mount the equipmen
18. PS640 Series Gas Domestic 8 Std Export ENGLISH Middleby Mieres Marshall PS640 Series Gas Ovens Model Combinations e PS640G Gas e Single Oven e Double Oven Two Stack e Triple Oven Three Stack OWNER S OPERATING AND INSTALLATION MANUAL for domestic and standard export ovens 2007 Middleby Marshall Inc A Middleby AL MRA Marshall is a registered trademark of Middleby Marshall Inc All rights reserved KI di Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 847 741 3300 FAX 847 741 4406 ise us ke NOTICE This Owner s 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 Ovens are shipped from the factory configured for use with natural gas If permitted by local national and international codes at the time of installation the oven may be converted to propane gas operation This conversion requires the use of at Gas Conversion Kit that is supplied with the oven For CE approved ovens the conversion is described in the nstallation section of this Manual For domestic and standard export ovens instructions are included in the Gas Conversion Kit It is suggested to obtain a service contract with a Middleby Marshall Authorized Service Agent WARNING POST IN A PROMINENT LOCATION THE EMERGEN
19. Section 3 Operation for details J Photo Cell Turns oven On when beam is interrupted Not Shown K Gas Burner gas ovens Heat air which is then projected to the air fingers by the blowers L Blowers Projecthotair from the burner or heating element to the air fingers M Air Fingers Project streams of hot air onto the food product l OVEN SPECIFICATIONS Table 1 1 Dimensions Single Oven Double Oven Triple Oven Overall Height 48 3 16 1219mm 62 3 4 1575mm 78 11 16 1981mm Overall Depth 60 1524mm 60 1524mm 60 1524mm Overall Length 76 1 2 1930mm 76 1 2 1930mm 76 1 2 1930mm Conveyor Width belt width is 32 33 1 2 838mm 33 1 2 838mm 33 1 2 838mm or 2 x 15 381mm or 2 x 15 881mm or 2 x 15 381mm Recommended Minimum Clearances Rear of Oven to Wall 3 76mm 3 76mm 3 76mm Control end of conveyor to Wall 1 25 4mm 1 25 4mm 1 25 4mm Non control end of conveyor to Wall 1 25 4mm 1 25 4mm 1 25 4mm Table 1 2 General Specifications PS640 GAS Weight 1150 Ibs 522kg Rated Heat Input 120 000 BTU 31 500kcal 37 kW hr Maximum Operation Temperature 600 F 315 C Air Blowers Two Blowers at 1900 RPM Warmup Time 15 min Table 1 3 Electrical specifications for PS640G gas ovens Main Blower Control Circuit Phase Freq Current Poles Wires Voltage Voltage Draw 208 240VAC 208 240VAC 1Ph 50 60Hz 11 9 6 Amp 2 Pole 3 Wire 2 hot
20. TEN THE CONVEYOR BELT If necessary the belt tension can be adjusted by turning the conveyor adjustment screws located at the idler right end of the conveyor N Replace the crumb trays 21 Figure 4 2 Removing Air Fingers and Plates Figure 4 3 Disassembling the Air Fingers Manifold Inner plate Outer Plate o Pull outer plate straight up Swing ends of inner plate and manifold apart Pull inher plate mon upwards and ken then away from cua d manifold sa a u E Step on lip of manifold MAINTENANCE EVERY 3 MONTHS Check that the oven is cool and the power is discon nected as described in the warning at the beginning of this Section Vacuum both of the blower mounts and their surrounding compartments using a shop vacuum Tighten all electrical terminal screws Split Belt Disassembly and Cleaning 1 Refer to Part D Conveyor Installation in the Installa tion section of this Manual Then remove the following components from the oven e Conveyor end stop e Crumb trays e Chain cover e Drive chains e End plugs e Conveyor assembly Remove the master links from each conveyor belt Then roll the belts up along the length of the conveyor to remove them from the frame Remove the two conveyor adjustment screws from the idler end of the conveyor frame as shown in Figure 4 4 Remove the idler shaft assembly from the conveyor Pull apart the two sections of the idler
21. allation must conform with local codes or in the absence of local codes with the National Fuel Gas Code ANSI Z223 1 latest edition Certain safety code requirements exist for the installation of gas ovens refer to the beginning of Section 2fora list of the installation standards In addition because the oven is equipped with cast ers the gas line connection shall be made with a connector that complies with the Standard for Connectors for Movable Gas Appliances ANSI Z21 69 in U S A as well as a quick discon nect device that complies with the Standard for Quick Disconnect Devices for Use With Gas Fuel ANSI Z21 41 in U S A C Gas Conversion Where permitted by local and national codes it is possible to convert ovens from natural to propane gas or from propane to natural gas Use the appropriate Middleby Gas Conversion Kit for the specific oven model CAUTION The terms ofthe oven s warranty require all start ups conversions and service work to be per formed by a Middleby Authorized Service Agent D PS640 Propane Conversion Two items have to be changed to change the oven to LP 1 Replace main orifices 2 Adjust main gas regulator per instructions below Disconnect the manifold union closest to the main burner and remove the manifold assembly four screws Slide out the manifold assembly leaving the ignition and sense wires con nected Replace the main orifices Replace the main orifices on the manifold assemb
22. anship 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 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 equipmentis installed started and demonstrated under the supervision of a factory autho rized 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 respon sible 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 durin
23. e SECTION 1 DESCRIPTION aise 1roniren aon 1 maga k OVEN UES srce ae 1 SECTION 3 OPERATION eene 14 Il OVEN COMPONENTS rre npno e tone en ere e co pner 1 l LOCATION AND DESCRIPTION OF CONTROLS 16 A Conveyor Motor Drive 1 II NORMAL OPERATION STEP BY STEP 17 B Crumb Pans ECRIRE TT 1 A Main Screen cccceececceeeesceeeesceeeesees 17 Gi Oy ON real E Y 1 B Daily Startup Procedure 18 PDE GG 1 C Daily Shutdown Procedure 18 E Eyebrows esses 1 IIl QUICK REFERENCE TROUBLESHOOTING 19 F iiio c 1 IV SCREEN ALEHTS eee ates oben iba o eisotdtss EE BRUtEmde de 19 G Machinery Compartment Access Panel 1 H Serial Plate eeeseeeeesseeeeeessse 1 SECTION 4 MAINTENANCE eene 20 Control Panel r k etid ie dilo a etiain nonus 1 I MAINTENANCE DAILY eene 20 J LUCRUM 1 Il MAINTENANCE MONTHLY 21 K Gas BUMET er sa p pan pat 1 IIl MAINTENANCE EVERY 3 MONTHS 22 Was c a ti a len n je ea ee eee 1 IV MAINTENANCE EVERY 6 MONTHS 23 M Air FINgETS eeeccsia esuada edited acean maid esae cente 1 V KEY SPARE PARTS KIT entier ette otro 24 Ill OVEN SPECIFICATIONS 3 aicdtec sean d
24. facturer of all warranty and liability NOTICE Middleby Marshall Manufacturer reserves the right to change specifications at any time NOTICE The equipment warranty is not valid unless the oven is installed started and demonstrated under the supervision of a factory certified installer NOTICE THIS EQUIPMENT IS ONLY FOR PROFESSIONAL USE AND SHALL BE USED BY QUALIFIED PERSONNEL RETAIN THIS MANUAL FOR FUTURE REFERENCE Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 USA e 847 741 3300 e FAX 847 741 4406 www middleby com Model No Mod le No Serial No Seri No MIDDLEBY MARSHALL No QUIBBLE LIMITED WARRANTY U S A ONLY MIDDLEBY MARSHALL HEREINAFTER REFERRED TO AS THE SELLER WARRANTS EQUIPMENT MANUFAC TURED BY IT TO BE FREE FROM DEFECTS IN MATE RIAL AND WORKMANSHIP FOR WHICH IT IS RESPON SIBLE THE SELLER S OBLIGATION UNDER THIS WAR RANTY SHALL BE LIMITED TO REPLACING OR REPAIR ING AT SELLER S OPTION WITHOUT CHARGE ANY PART FOUND TO BE DEFECTIVE AND ANY LABOR AND MATERIAL EXPENSE INCURRED BY SELLER IN REPAIR ING 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 unde
25. g 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 and 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 prospective 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 Pag
26. he conveyor frame With the screws removed lift the end of the shaft at the front of the oven and pull the entire assembly free of the conveyor frame The brackets will be removed along with the drive shaft assembly Disassemble and lubricate the two sections of the drive shaft as described for the idler shaft above Before reassembling the shafts into the conveyor frame check that they are oriented properly Reassemble the drive shaft into the conveyor Make sure that the bronze washer is in place between the two sections of the shaft See Figure 4 4 Replace the drive sprockets Reassemble the belts and master links onto the conveyor Reinstall the end plugs and conveyor onto the oven Reattach the drive chains Replace the chain cover Check the tension of the conveyor belt as shown in Figure 2 14 in Section 2 Installation The belt should lift about 1 25mm If necessary adjust the belt tension by turning the conveyor adjustment screws Replace all components onto the oven Figure 4 5 Drive shaft configurations Figure 4 6 Disassembling the drive shaft AO E Blower Belt 1 Remove the six screws shown in Figure 4 7 Then remove the rear panel from the oven 2 Check the blower belt for the proper 1 4 6mm deflec tion at the center and for cracking or excessive wear See Figure 4 7 Overtightening the belt will cause premature bearing failure and possible vibrations A loose belt may al
27. ircuit 9 Close pressure tap screw Figure 2 20 Burner Assembly Maine Orifices Manifold Assembly Figure 2 21 Gas Valve Adjustment Screw 5 mm Adjustment Screw for minimum pressure 8 mm for setting maximum pressure setting 15 Adjusting the Minimum Pressure Setting 1 Disconnect pressure feedback connection if appcable Connect a suitable pressure gauge to pipe line or to outlet pressure tap of gas control concerned to measure burner pressure measuring point must be as near to burner as possible 3 Disconnect electrical connection of the Moduplus 4 Energize operator set control in operation and wait until an outlet pressure is recorded on pressure gauge 5 I fminimum rate pressure needs adjustment use an 8 mm wrench to turn adjustment screw for minimum pressure setting clockwise to increase or counter clockwise to decrease pressure until the desired minimum outlet pressure is obtained 6 Check if main burner lights easily and reliable at minimum pressure 7 Reconnect pressure feedback connection if appcable 8 Close pressure tap screw G Checkout After any adjustment set appliance in operation and observe through a component cycle to ensure that burner system components function correctly H Maintenance It is recommended to check yearly the minimum and the maximum setting and readjust them if necessary SECTION 3 OPERATION C Temperature Control Display V
28. ition Incorrect master link position E Final Assembly 1 Installthe crumb trays underneath the conveyor as shown in Figure 2 16 Figure 2 16 Crumb Trays Crumb tray insertion CONVEYOR BELT REVERSAL Conveyor belt reversal consists of three steps 1 Physically reversing the conveyor belt 2 Resetting direction jumper on the conveyor control board 3 Switching the photo detector 12 REVERSING THE CONVEYOR BELT Remove the conveyor from the oven and find the master link location Remove master links and remove the belt from the conveyor frame Reassemble the belt back onto the frame in the reverse direction and reinstall the master links Replace the conveyor assembly in the oven RESETTING DIRECTION JUMPER Locate Jumper P1 on the conveyor control board Move jumper from terminals 1 and 2 and replace onto terminals 2 and 3 CAUTION Shock hazard in compartments electrical filters are electrically alive SWITCHING PHOTO DETECTOR CAUTION Disconnect Power Before Switching Photo eye AN Hemove the three screws securing the access door to the unit Open the access door and disconnect the connector fitting to the photo eye assembly Remove the two screws securing the photo eye assembly to the control box Remove the four nuts securing the photo eye to the housing Rotate the photo eye 180 degrees and resecure the photo eye with the four nuts On the opposite control box remove the two screws holding
29. lies with the LP units and replace the manifold assembly Reconnect the union E Adjusting the Maximum Pressure Setting 1 Disconnect pressure feedback connection if appcable 2 Connect a suitable pressure gauge to pipe line or to outlet pressure tap of gas control concerned to mea sure burner pressure measuring point must be as near to burner as possible Figure 2 18 Flexible Gas Hose Installation 1 2 gas pipe nipple 3 4 1 2 gas pipe To Gas reducer Supply N Pipe bh 3 4 gas C pipe nipple 1 1 2 gas line tee with W pressure tap x Full Flow Gas Shutoff Valve Individual gas connection for Flexible Quick Gas Hose disconnect each oven device cavity Figure 2 19 Gas Burner Assembly Gas Burner Manifold Pressure Tap 3 Make sure that the appliance is in operation and the Moduplus coil is energized with maximum current 4 fmaximum rate pressure needs adjustment use an 8 mm wrench to turn adjustment screw for maximum pressure setting clockwise to increase or counter clockwise to decrease pressure until the desired maximum outlet pressure is obtained 5 Disconnect electrical connection of the Moduplus 6 Check minimum pressure setting and readjust if neces sary See Adjusting Minimum Pressure Setting for proper adjusting procedure 7 Reconnect pressure feedback connection if appcable 8 If minimum and maximum pressures are set wire the Moduplus in c
30. motor compartment These switches interrupt electrical power to the oven when the Machinery Compartment Access Panelis opened OR when the rear panel is removed Connection Refer to the wiring diagram inside the machinery compartment of the oven to determine the correct connections for the electrical supply lines Connect the supply as indicated on the wiring diagram CAUTION AN The terms of the oven s warranty require all Start ups conversions and service work to be performed by a Middleby Marshall Authorized Service Agent 13 Gas Inlet One per Single Double or Triple Oven Vil GAS SUPPLY CAUTION DURING PRESSURE TESTING NOTE ONE OF q 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 psi 3 45 kPa 2 Theovenmustbeisolatedfrom the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressure equal to or less than 72 psi 3 45 kPa 3 If incoming pressure is over 14 W C 35mbar a separate regulator MUST be installed in the line BE FORE the individual shutoff valve for the oven WARNING AN To prevent damage to the control valve regu lator during initial turn on of gas it is very important to open the manual shutoff valve very slowly After the initial gas turn on
31. n serial plate before making any electric supply connections Electric supply connections must agree with data Figure 2 17 Utility Connection Locations for Gas Ovens Strain relief fitting Electrical Junction Box One per oven cavity on the oven serial plate The location of the serial plate is shown in Figure 1 1 in Section 1 Description A fused disconnect switch or a main circuit breaker customer furnished MUST be installed in the electric supply line for each oven cavity It is recommended that the switch circuit breaker have Lockout Tagout capability The supply conductors must be of the size and material copper recommended Refer to the wiring diagram inside the machinery compartment of the oven Electrical specifications are also listed on the oven s serial plate and in Table 1 3 Electrical Specifications in Section 1 Description The oven requires a ground connection to the oven ground screw For gas ovens the screw is located in the electrical junction box see Figure 2 14 If necessary have the electri cian supply the ground wire Do NOT use the wiring conduit or other piping for ground connections Incoming electrical power lines are fed through the strain relief fitting shown in Figure 2 14 The electrical supply connections are made inside the electrical junction box The power lines then connect to the oven circuits through safety switches located inside the machinery compartment and each blower
32. nenne 14 The diagram for each oven is also on the lower D Propane Conversion eeecee 14 inner surface of its Control Console E Adjusting the Maximum Pressure Setting 14 F Adjusting the Minimum Pressure Setting 15 Cs CIO CK OUI e 15 H Maintenance PE 15 TABLE OF CONTENTS SECTION 1 DESCRIPTION l OVEN USES Figure 1 1 Oven Components PS640 Series Ovens can be used to bake and or cook a wide variety of food products such as pizza pizza type products cookies sandwiches and others Il OVEN COMPONENTS see Figure 1 1 A Conveyor Drive Motor Moves the conveyor B Crumb Pans Catch crumbs and other materials that drop through the conveyor belt One crumb pan is located at each end of the conveyor C Conveyor Moves the food product through the oven UO End Plugs Allow access to the oven s interior E Eyebrows Can be adjusted to various heights to prevent heat loss into the environment F Window Allows the user to access food products inside the baking chamber G Machinery Compartment Access Panel Allows access to the oven s interior and control components No user serviceable parts are located in the machinery compart ment H Serial Plate Provides specifications for the oven that affect installation and operation Refer to Section 2 Instal lation for details l Control Panel Location of the operating controls for the oven Refer to
33. on and gas supply e Test for correct air supply particularly to the Check that the ventilation system is in operation burner blower WARNING Keep the appliance area free and clear of combustibles WARNING The oven must be installed on an even level non flammable flooring and any adjacent walls must be non flammable Recommended minimum clearances are specified in the Description section of this manual 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 CAUTION To reduce the risk of fire the appliance is to be mounted on floors of noncombustible construction with noncombustible flooring and surface finish and with no combustible material against the underside thereof or on noncombustible slabs or arches having no combustible material against the underside thereof such construction shall in all cases extend not less than 12 inches 304mm beyond the equipment on all sides CAUTION For additional installation information contact your local Authorized Service Agent NOTE There must be adequate clearance between the oven and combustible construction Clearance must also be provided for servicing and for proper operation NOTE An electrical wiring diagram for the oven is located inside the machinery compartment NOT
34. p on the shelf faces DOWN Seal joint between leg and shelf with NSF listed silicone Install one caster onto each leg extension as shown in Figure 2 7 Use the 3 8 16 x 1 screws 3 8 flat wash ers and 3 8 lockwashers supplied in the Installation Kit The locking casters should be installed at the FRONT of the oven The non locking casters should be installed at the REAR of the oven Install the lower oven cavity onto the base pad See Fig 2 7 For single ovens ONLY Install the top panel using the screws included in the base pad kit as shown in Figure 2 8 Then skip ahead to Part C Restraint Cable Installation For double or triple ovens Continue on to Part B Stacking Note that the top panel should NOT be installed for double and triple ovens until after stacking the oven cavities Figure 2 7 Base pad Installation Bottom oven cavity Assembled base pad Figure 2 6 Leg extension and casters installation Finished sides of leg extension face corner of base pad Domestic and standard export ovens Locking casters FRONT of oven Non locking casters va REAR of oven S 3 8 flat washer 3 8 lock OO washer E 316 x1 hex screw Figure 2 8 Top panel installation 10 32 x 2 1 2 Top screw length Br panel 10 32 x 3 4 p screw length NOTE DO NOT install top panel onto double or triple ovens until AFTER stacking the oven cavities See Part B S
35. pport bracket Conveyor placed in oven A9 8 0 ATA 0 Figure 2 14 Conveyor Belt tension A marana LI d LT LLALLLAD YN Ex mwen ala an DEGA A TNA ANANAS 2 ZB BI AA AZIL LI 1 25mm vertical deflection Adjustment screws 2 on idler end of conveyor 11 5 If it is necessary to add or remove conveyor links to achieve the correct tension OH if it is necessary to reverse the conveyor belt for correct orientation the belt will need to be removed from the conveyor frame If this is necessary perform the following procedure e Remove the conveyor assembly from the oven and place it flat on the floor e Hemove the master links using long nose pliers Then roll up the belt along the length of the conveyor frame e Add or remove belt links as necessary to achieve the correct belt tension e Replace the belt on the conveyor frame Check that the conveyor belt links are oriented as shown in Figure 2 15 and that the smooth side of the conveyor belt faces UP e Connectthe inside master links Check thatthe links are oriented as shown in Figure 2 15 e Connect the outside master links Note that the outside master links each have an open hook on one side This hook aligns with the hooks along the sides of the other conveyor links See Figure 2 15 e Replace the conveyor into the oven Figure 2 15 Conveyor and Master Link orientation Direction of travel CORRECT master link pos
36. r the supervision of a factory autho rized installer Normal maintenance functions including lubrication clean ing 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 prin cipal 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 merchantability or of fitness for a particu lar purpose The foregoing shall be Seller s sole and exclusive obligation and Buyer s sole and exclusive remedy for any action in cluding breach of contract or negligence In 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 equip ment sold on or after February 15 1995 2003 Middleby Marshall A Middleby Company Installation Date 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 workm
37. rical supply WARNING Possibility of injury from moving parts and electrical shock exists in this oven Switch off and lockout tagout the electric supply BEFORE beginning to disassemble clean or service any oven Never disassemble or clean an oven with the BLOWER gt switch or any other circuit of the oven switched on CAUTION NEVER use a water hose or pressurized steam cleaning equipment when cleaning this oven To avoid saturating the oven insulation DO NOT use excessive amounts of water DO NOT use a caustic oven cleaner which can damage the bake chamber surfaces NOTE ANY replacement parts that require access to the interior of the oven may ONLY be replaced by a Middleby Marshall Authorized Service Agent It is also strongly recommended that the 3 Month Maintenance and 6 Month Maintenance procedures in this section be performed ONLY by a Middleby Marshall Authorized Service Agent l MAINTENANCE DAILY Figure 4 1 Cooling Vents and Grills A Check that the oven is cool and the power is discon nected as described in the warning at the beginning of this Section B Clean ALL of the cooling fan grills and vent openings with a stiff nylon brush Refer to Figure 4 1 for the locations of the grills and vents C Clean the outside of the oven with a soft cloth and mild detergent D Check that ALL cooling fans are operating properly Vents on CAUTION Ifa cooling fan is not operating correctly it must ga be replaced I
38. s bo aks siz 2 A Dimensions RR 2 SECTION 5 ELECTRICAL WIRING DIAGRAM 25 B General Specifications 2 WIRING DIAGRAM 640 GAS OVEN 208 240V C Electrical Specifications for 35d RE T 25 P5640 Gas Ovens esee 2 D Gas Orifice and Pressure Specifications for P8640 Gas Ovens 2 SECTION 2 INSTALLATION eese 3 l BASE PAD KIT eeeeeseeeeennrnnnnnnnn nnn 4 Il INSTALLATION KIT eeeeeeeeenren 5 Ill VENTILATION SYSTEM eii sotti dis t b f v 8 A Requirements wis scsecsicniunccicaventeaseasuctensemmtentene 8 B Recommendations sse 8 C Other Ventilation Concerns 8 I ASSEMBLY die E 9 A Base Pad Legs Casters 9 B ON N PERENNE RETO 10 C Restraint Cable Installation 10 D Conveyor Installation 11 E Standoff Installation 11 V FINAL ASSEMBLY ioter Debe reo eter 12 VI ELECTRICAL SUPPLY tne otio oEResus 12 COMING CHO usce soododiicto inm tee ipee prenom 13 MIL GAS SUPPLY akfensateun ive reto s t see nto EEROR sad 13 NOTE B Connection ke ann 44 Wiring Diagrams are in Section 5 of this Manual C Gas Conversion ssennnsnennnnnennnnneennnnee
39. so cause vibrations 3 If necessary adjust the tension of the belt by loosening the four motor mounting bolts Reposition the motor as neccessary until the correct 1 4 6mm deflection is reached then tighten the bolts 23 Figure 4 7 Rear panel access Remove eight 8 screws to remove rear panel Bearings 2 total Grease fitting 1 per bearing Blower belt Blower motor Loosen four 4 screws to adjust motor position and belt tension IV MAINTENANCE EVERY 6 MONTHS A Check that the oven is cool and the power is discon nected as described in the warning at the beginning of this Section Check for excessive wear on the conveyor drive motor brushes The brushes should be replaced if they have worn to less than 1 4 6mm in length Be sure to replace the brushes in exactly the same position For gas ovens inspect and clean the burner nozzle and the spark electrode assembly Check the conveyor drive shaft bushings and spacers Replace the components if they are worn V KEY SPARE PARTS Available separately See Figure 4 8 ITEM QTY CO N O 01 AIIN Aa IN a la ee es WM O O CO N oOo BB JQIN O The M ddieby Corporation lt ee a N e ae Ml a IN ee af aj ee a P N 60191 58920 58679 60192 M9608 60196 97525 51399 50610 57288 50239 60679 60671 33983 32108 60193 58668 5866
40. so be brought in directly from outside the building but detrimental effects can result from extreme seasonal hot and cold tempera tures from the outdoors NOTE Return air from the mechanically driven system must not blow at the opening of the baking chamber Poor oven baking performance will result C Other ventilation concerns e Special locations conditions or problems may require the services of a ventilation engineer or specialist e Inadequate ventilation can inhibit oven performance e It is recommended that the ventilation system and duct work be checked at prevailing intervals as specified by the hood manufacturer and or HVAC engineer or specialist Figure 2 5 Ventilation System 18 458mm minimum Typical both 2 51mm 8 203mm 3 76mm ends of oven minimum minimum minimum IV ASSEMBLY A Top Panel and Base Pad Assembly 1 Install the four leg extensions onto the base pad using the 3 8 16 x 1 screws 3 8 flat washers and 3 8 lockwashers supplied in the Base Pad Kit See Figure 2 6 Check that the finished sides of each leg extension face OUTWARDS One rear leg should be attached using three 3 8 16 x 1 screws and the 3 4 eyebolt as shown in Figure 2 6 This eyebolt acts as the anchor point for the restraint cable assembly see Part C Restraint Cable Installation If your oven is equipped with the lower shelf position it in place as shown in Figure 2 6 Check that the li
41. stallation instructions in Section 2 Installation E Remove the end plugs from the oven The end plugs are shown in Figure 1 1 in Section 1 Description F Slide the air fingers and blank plates out of the oven as shown in Figure 4 2 AS EACH FINGER OR PLATE IS REMOVED WRITE A LOCATION CODE ON IT WITH A MARKER to make sure that it can be reinstalled correctly Example of markings Top Row T1 Bottom Row B1 T2 T3 T4 B2 B3 B4 T5 T6 B5 B6 G Disassemble the air fingers as shown in Figure 4 3 AS EACH FINGERIS DISASSEMBLED WRITE THE LOCATION CODE FOR THE FINGER ON ALL THREE OF ITS PIECES This will help you in correctly reassembling the air fingers CAUTION Incorrectreassembly of the air fingers will change the baking properties of the oven H Clean the air finger components and the interior of the baking chamber using a vacuum cleaner and a damp cloth Refer to the boxed warnings at the beginning of this Section for cleaning precautions Reassemble the air fingers Then replace them in the oven using the location guide as a guide J Replace the end plugs on the oven K Reassemble the conveyor into the oven If the drive sprocket was removed when installing the conveyor replace it at this time L Reattach the drive chain Check the tension of the conveyor belt as shown in Figure 2 14 in Section 2 Installation The belt should lift between 3 4 75 100mm DO NOT OVERTIGH
42. t directly to the oven MOUNTING SUCH EQUIPMENT ON THE OVEN MAY e VOID AGENCY CERTIFICATIONS e RESTRICT SERVICE ACCESS e LEAD TO INCREASED SERVICE EXPENSES FOR THE OWNER A Requirements CAUTION AN A mechanically driven ventilation system is STRONGLY RECOMMENDED for electric oven installations PROPER VENTILATION OF THE OVEN IS THE RESPONSI BILITY OF THE OWNER Gas oven installations REQUIRE a mechani cally driven ventilation system with electrical exhaust air sensing control B Recommendations NOTE THAT THE HOOD DIMENSIONS SHOWN IN FIGURE 2 5 ARE RECOMMENDATIONS ONLY LOCAL NATIONAL AND INTERNATIONAL CODES MUST BE FOLLOWED WHEN INSTALLING THE VENTILATION SYSTEM ANY APPLICABLE CODES SUPERSEDE THE RECOMMENDATIONS SHOWN IN THIS MANUAL The rate of air flow exhausted through the ventilation system may vary depending on the oven configuration and hood design Consult the hood manufacturer or ventilation engineer for these specifications To avoid a negative pressure condition in the kitchen area return air must be brought back to replenish the air that was exhausted A negative pressure in the kitchen can cause heat related problems to the oven components as if there were no ventilation at all The best method of supplying return air is through the heating ventilation and air conditioning HVAC system Through the HVAC system the air can be tempera ture controlled for summer and winter Return air can al
43. t light call for Service Turn oven off and allow to cool Reassemble fingers correctly Allow oven to preheat Turn oven off and allow to cool Check conveyor for blockage Clean window Sensor requires maintenance call for service SOLUTION A qualified service technician should accomplish this Failure to do this will eventually shut down the oven due to excessive temperature Remove obstruction and restart oven If no obstruction call service Remove obstruction and restart oven If no obstruction call service SECTION 4 MAINTENANCE WARNING Before ANY cleaning or servicing of the oven perform the following procedure 1 Switch off the oven and allow it to cool Do NOT service the oven while it is warm 2 Turn off the electric supply circuit breaker s and disconnect the electric supply to the oven 3 lfitis necessary to move a gas oven for cleaning or servicing disconnect the gas supply before moving the oven When all cleaning and servicing is complete If the oven was moved for servicing return the oven Turn on the full flow gas safety valve Test the gas to its original location line connections for leaks using approved leak test If the restraint cable was disconnected to clean or substances or thick soap suds service the oven reconnect it at this time Turn on the electric supply circuit breaker s Reconnect the gas supply Perform the normal startup procedure Reconnect the elect
44. tacking B Stacking For single ovens skip ahead to Part C Restraint Cable Installation IMPORTANT Middleby Marshall STRONGLY RECOMMENDS that PS640 Gas oven cavities be stacked BY AUTHORIZED PERSONEL Contact your Middleby Marshall Authorized Service Agent for complete stacking instructions 1 Stack an oven cavity on top of the lower oven Check the following e All four sides of the lower lip on the bottom edge ofthe oven cavity overlap the top of the lower oven e The oven is level e The oven is firmly seated See Figure 2 9 2 For triple ovens repeat Step 1 to install the top oven cavity 3 Install the top panel using the screws included in the base pad kit as shown in Figure 2 10 Figure 2 9 Stacking 10 C Restraint Cable Installation Because the oven is equipped with casters a restraint cable assembly must be installed to limit the movement of the appli ance without depending on the connector and the quick discon nect device or its associated piping One end of the cable is anchored to the eyebolt on the rear surface of the oven s base pad while the other is anchored to the wall See Figure 2 11 After connecting the restraint cable move the oven to its final location Adjust the bottom hex sections of the feet so that the casters are off the floor For quad ovens lock the two front casters Figure 2 10 Top panel installation 1110 32 x 3 4 Top screws panel nn 10
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