Middleby Marshall P/N 60250 User's Manual
Contents
1. Air Fingers 1 III OVEN SPECIFICATIONS 2 A Dimensions 2 B General Specifications 2 C Electrical Specifications for PS740 Gas Ovens 2 D Gas Orifice and Pressure Specifications for PS740 Gas Ovens 2 SECTION 2 INSTALLATION 3 I BASE PAD KIT 4 II INSTALLATION KIT 6 III VENTILATION SYSTEM 12 A Requirements 12 B Recommendations 12 C Other Ventilation Concerns 12 IV ASSEMBLY 13 A Base Pad Legs Casters 13 B Stacking 14 C Restraint Cable Installation 14 D Conveyor Installation 15 E Standoff Installation 15 V FINAL ASSEMBLY 16 VI ELECTRICAL SUPPLY2. 16 Connection 17 VII GAS SUPPLY 17 A Gas Utility Rough In Recommendations 17 B Connection 18 C Gas Conversion 18 D Propane Conversion 18 E Adjusting the Maximum Pressure Setting 18 F Adjusting the Minimum Pressure Setting 19 G Checkout 19 H Maintenance 19 Page SECTION 3 OPERATION 20 I LOCATION AND DESCRIPTION OF CONTROLS 20 II NORMAL OPERATION STEP BY STEP 21 A Main Screen 21 B Daily Startup Procedure 21 C Daily Shutdown Procedure 21 III QUICK REFERENCE TROUBLESHOOTING 22 IV SCREEN ALERTS 22 SECTION 4 MAINTENANCE 23 I MAINTENANCE DAILY 23 II MAINTENANCE MONTHLY 24 III MAINTENANCE EVERY 3 MONTHS 25 IV MAINTENANCE EVERY 6 MONTHS
3. 26 V KEY SPARE PARTS KIT 27 SECTION 5 ELECTRICAL WIRING DIAGRAM 28 I WIRING DIAGRAM 740 GAS OVEN 208 240V 50 60 Hz 1 Ph 28 TABLE OF CONTENTS 1 P N 60250 September 28 2012 I OVEN USES PS740 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 II 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 D 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 ser viceable parts are located in the machinery compartment H Serial Plate Provides specifications for the oven that affect installation and operation Refer to Section 2 Installation for details I Control Panel Location of the operating controls for the oven Refer to Section 3 Operation for details J Photo Cell Turns o
4. 3 76mm minimum 8 203mm minimum 13 P N 60250 September 28 2012 IV ASSEMBLY A Top Panel and Base Pad Assembly 1 Install the four leg extensions onto the base pad using the 3 8 16 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 exten sion face OUTWARDS One rear leg should be attached using three 3 8 16 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 2 If your oven is equipped with the lower shelf position it in place as shown in Figure 2 6 Check that the lip on the shelf faces DOWN Seal joint between leg and shelf with NSF listed silicone 3 Install one caster onto each leg extension as shown in Figure 2 7 Use the 3 8 16 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 4 Install the lower oven cavity onto the base pad See Fig 2 7 5 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
5. Incorrect reassembly 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 I 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 M Check the tension of the conveyor belt as shown in Fig ure 2 14 in Section 2 Installation The belt should lift between 3 4 75 100mm DO NOT OVERTIGHTEN 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 Figure 4 2 Removing Air Fingers and Plates Figure 4 3 Disassembling the Air Fingers 25 P N 60250 September 28 2012 III MAINTENANCE EVERY 3 MONTHS A Check that the oven is cool and the power is disconnected as described in the warning at the beginning of this Section B Vacuum both of the blower mounts and their surrounding compartments using a shop vacuum C Tighten all electrical terminal screws D Split Belt Disassembly and Cleaning 1 Refer to Part D
6. Message Bar Displays the average set point of both right and left sides of the oven Pressing on the display allows individual temperature displays and adjustments D Message Bar Displays messages during oven operation E Energy Level Indicators Displays energy usage on left and right sides of the oven WARNING DO NOT SPRAY AEROSOLS IN THE VICINITY OF THIS APPLIANCE WHILE IT IS IN OPERATION 21 P N 60250 September 28 2012 II NORMAL OPERATION STEP BY STEP A Daily Startup Procedure 1 Check that the circuit breaker fused disconnect is in the On position Check that the window is closed The touch panel display should be lit 2 Adjust the conveyor to the desired bake time 3 Press the temperature button to display right and left hand oven settings Set temperatures as desired 4 Press the ON button to activate the oven The conveyor will not run until the oven temperature has reached the set points B Daily Shutdown Procedure 1 Make certain there are no products left on the conveyor in the oven 2 Press the ON square to turn the oven off 3 Open the window to allow the oven to cool faster 4 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 A Main Screen 1 On Off button Used to turn oven On and Off 2 Conveyor speed Pressing on either the minutes or seconds
7. NOTES 30 P N 60250 September 28 2012 NOTES 31 P N 60250 September 28 2012 NOTES P N 60250 September 28 2012 Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 USA 847 741 3300 FAX 847 741 4406 www middleby com Middleby is proud to support the Commercial Food Equipment Service Association CFESA We recognize and applaud CFESA s ongoing efforts to improve the quality of technical service in the industry WARNING Improper installation adjustment alteration service or maintenance can cause property damage injury or death Read the installation op erating 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 par ties other than your Middleby Marshall Authorized Service Agent may void your war ranty NOTICE Using any parts other than genuine Middleby Marshall factory manufactured parts re lieves the manufacturer of all warranty and liability NOTICE Middleby Marshall reserves the right to change specifications at any time
8. Conveyor Installation in the Installa tion section of this Manual Then remove the following components from the oven Conveyor end stop Crumb trays Chain cover Drive chains End plugs Conveyor assembly 2 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 3 Remove the two conveyor adjustment screws from the idler end of the conveyor frame as shown in Figure 4 4 4 Remove the idler shaft assembly from the conveyor 5 Pull apart the two sections of the idler shaft 6 Clean the 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 7 Before reassembling the shafts into the conveyor frame check that they are oriented properly 8 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 9 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 10 Loosen the set screw on both of the conveyor drive sprockets Then remove the sprockets from the shaft 11 Check the conveyor configuration as follows High spee
9. N61123 P N61457 P N61458 PS740 Single Gas Oven 1 1 PS740 Double Gas Oven 2 1 PS740 Triple Gas Oven 3 1 5 P N 60250 September 28 2012 PS740 OVEN INSTALLATION REQUIRED KITS AND EQUIPMENT PS740 PS740 PS740 PS740 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 N61033 P N67025 P N67026 P N66164 PS740 Single Gas Oven 1 1 PS740 Double Gas Oven 2 1 PS740 Triple Gas Oven 3 1 3 2 4 6 5 1 PARTS LIST FOR SERIES PS740 GAS OVEN INSTALLATION KIT P N 61033 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 61823 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 amp DOOR Figure 2 1B PS740 Series Gas Oven Installation Parts 6 P N 60250 September 28 2012 Figure 2 2A Model PS740 24 Single Oven Option Base with Legs and Top PARTS LIST FOR PS740 SERIES 24 SINGLE OVEN OPTION BASE w 15 LEGS amp TOP P N 67027 HARDWARE BAG 5 6 7 10 amp 11 1 2 4 9 8 ITEM NO QTY PART NO DESCRIPTION 1 1 64943 COMPLETE BASE WELDMENT 2 4 66851 TOP PLATE LEG
10. WELDMENT 4 4 58930 SWIVEL CASTER FLAT PLATE 5 32 2000531 3 8 16 1 HEX SCREW SST 6 32 21416 0001 3 8 FLAT WASHER SS 7 32 21422 0001 3 8 SPLIT LOCK WASHER ZP 8 1 22450 0228 RESTRAINT CABLE ASSEMBLY 9 1 61125 TOP COVER 10 2 59677 SCR MS SL TR HD 10 32 2 1 2 11 2 7A2S15 SCR MS STR TRSHD 10 32 3 4 7 P N 60250 September 28 2012 Figure 2 2B Model PS740 32 Single Oven Option Base with Legs and Top PARTS LIST FOR PS740 SERIES 32 SINGLE OVEN OPTION BASE w 15 LEGS amp TOP P N 67025 HARDWARE BAG 5 6 7 10 amp 11 1 2 4 9 8 ITEM NO QTY PART NO DESCRIPTION 1 1 66159 COMPLETE BASE WELDMENT 2 4 66851 TOP PLATE LEG WELDMENT 4 4 58930 SWIVEL CASTER FLAT PLATE 5 32 2000531 3 8 16 1 HEX SCREW SST 6 32 21416 0001 3 8 FLAT WASHER SS 7 32 21422 0001 3 8 SPLIT LOCK WASHER ZP 8 1 22450 0228 RESTRAINT CABLE ASSEMBLY 9 1 59560 TOP COVER 10 2 59677 SCR MS SL TR HD 10 32 2 1 2 11 2 7A2S15 SCR MS STR TRSHD 10 32 3 4 8 P N 60250 September 28 2012 ITEM NO QTY PART NO DESCRIPTION 1 1 64943 COMPLETE BASE WELDMENT 2 4 66853 TOP PLATE LEG WELDMENT 4 4 58930 SWIVEL CASTER FLAT PLATE 5 32 2000531 3 8 16 1 HEX SCREW SST 6 32 21416 0001 3 8 FLAT WASHER SS 7 32 21422 0001 3 8 SPLIT LOCK WASHER ZP 8 1 22450 0228 RE
11. allows a new value to be input for the conveyor speed Split belt ovens have two inputs front and rear belts 3 Oven temperature Pressing on the set temperature shifts the user to the oven temperature set point indicator screen 4 Energy level indicators Indicators to either side of the screen indicate the energy input to that side of the oven 5 Message bar Indicates various messages pertaining to current oven conditions B Oven Temperature Set Point Indicator Screen 1 Right actual temperature Indicates current average tem perature of the right side of the oven 2 Left actual temperature Indicates current average tem perature of the left side of the oven NOTE Right to Left temperature settings should not exceed a differential of 20 F 3 Right Set point temperature Pressing on this value allows the user to adjust the set point for the right side of the oven 4 Left Set point temperature Pressing on this value allows the user to adjust the set point for the left side of the oven 5 Exit Returns to the main screen C 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 1500 RPM while the oven maintains temperature and belt speed Energy Mode Two The oven lowers its set point by 100 F and stops the belt Anytime that the oven is more than 10 degrees
12. cleaning or servicing disconnect the gas supply before moving the oven When all cleaning and servicing is complete 1 If the oven was moved for servicing return the oven to its original location 2 If the restraint cable was disconnected to clean or service the oven reconnect it at this time 3 Reconnect the gas supply 4 Reconnect the electrical supply 5 Turn on the full flow gas safety valve Test the gas line connections for leaks using approved leak test substances or thick soap suds 6 Turn on the electric supply circuit breaker s 7 Perform the normal startup procedure I MAINTENANCE DAILY A Check that the oven is cool and the power is disconnected 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 CAUTION If a cooling fan is not operating correctly it must be replaced IMMEDIATELY Operating the oven 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 Re
13. directly from outside the building but detri mental effects can result from extreme seasonal hot and cold temperatures 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 Special locations conditions or problems may require the services of a ventilation engineer or specialist Inadequate ventilation can inhibit oven performance 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 A Requirements CAUTION Gas oven installations REQUIRE a mechanically driven ventilation system with electrical exhaust air sensing control A mechanically driven ventilation system is STRONGLY RECOMMENDED for electric oven installations PROPER VENTILATION OF THE OVEN IS THE RESPON SIBILITY OF THE OWNER IMPORTANT Where national or local codes re quire the installation of fire sup pression equipment or other supplementary equipment DO NOT mount the equipment directly to the oven MOUNTING SUCH EQUIPMENT ON THE OVEN MAY VOID AGENCY CERTIFICATIONS RESTRICT SERVICE ACCESS LEAD TO INCREASED SERVICE EXPENSES FOR THE OWNER Figure 2 5 Ventilation System 18 458mm minimum Typical both ends of oven 2 51mm minimum
14. 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 motor compartment These switches interrupt electrical power to the oven when the Machinery Compartment Access Panel is opened OR when the rear panel is removed Connection Refer to the wiring diagram inside the machinery compart ment of the oven to determine the correct connections for the electrical supply lines Connect the supply as indicated on the wiring diagram CAUTION 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 Figure 2 17 Utility Connection Locations for Gas Ovens Strain relief fitting Electrical Junction Box One per oven cavity Gas Inlet One per Single Double or Triple Oven VII GAS SUPPLY CAUTION DURING PRESSURE TESTING NOTE ONE OF 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 pressu
15. over its set point the burners will completely shut off allowing the oven to cool and the burners are on minimum flow The main blowers will continue to run at 1500 RPM in this mode Placing any article on the input belt will cause normal operation of the oven to resume and bring the set point back to its original level The belt will resume operation once both sides of the oven are within 5 F of the set point Energy Mode Three The oven will turn off completely and shut off the circulation blowers once the oven temperature has dropped below 200 F Placing any article on the input belt will cause normal operation of the oven to resume and bring the set point back to its original level The belt will resume opera tion once both sides of the over are within 5 F of the set point Energy Mode Four This is a complete oven shut down Plac ing anything on the belt will NOT return the oven to Operation The ON button on the main screen has to be pressed to restart the oven 22 P N 60250 September 28 2012 III QUICK REFERENCE TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION No electrical power Check that the circuit breaker fused disconnect is on Make sure the emergenct stop button is on Oven will not turn On No gas pressure Burner did not light Make sure main gas is on Turn oven off and restart If it still does not light call for service Oven will not heat Air fingers may be
16. saving Mode 3 Normal operation 23 P N 60250 September 28 2012 Vents on front panel of oven Fan grills 2 on rear of oven and control compartment Vent 1 on rear of machinery compartment SECTION 4 MAINTENANCE 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 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 Autho rized 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 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 If it is necessary to move a gas oven for
17. the top panel should NOT be installed for double and triple ovens until after stacking the oven cavities Figure 2 6 Leg extension and casters installation Figure 2 7 Base pad Installation Assembled base pad Bottom oven cavity 10 32 3 4 screw length Top panel Figure 2 8 Top panel installation 1 2 flat washer 1 2 lock washer 1 2 13 1 1 4 hex screw 10 32 2 1 2 screw length 14 P N 60250 September 28 2012 NOTE DO NOT install top panel onto double or triple ovens until AFTER stacking the oven cavities See Part B Stacking B Stacking For single ovens skip ahead to Part C Restraint Cable Installation IMPORTANT Middleby Marshall STRONGLY RECOMMENDS that PS740 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 All four sides of the lower lip on the bottom edge of the oven cavity overlap the top of the lower oven The oven is level 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 Figure 2 10 Top panel installation C Restraint Cable Installation Because the oven is equipped w
18. 27 3 83 16x1 1 4 HEX BOLT 8 32 A21924 3 83 FLAT WASHER SS 9 32 21422 0001 3 83 SPLIT LOCK WASHER ZP 10 16 21172 0004 3 83 16 NYLON INSULATED LOCKNUT ZC 11 8 2001048 1 23 13 x 1 3 8 18 8 HEX CAPSCREW 12 8 A27750 1 23 18 8 FLAT WASHER 13 8 21422 0016 1 23 18 8 LOCK WASHER 14 2 59677 SCR MS SL TR HD 10 32X2 1 2 15 1 22450 0228 RESTRAINT CABLE ASSEMBLY 16 1 61125 TOP COVER 17 2 7A2S15 SCR MS STR TRSHD 10 32X3 4 PARTS LIST FOR PS740 SERIES 24 TRIPLE OVEN OPTION BASE w CASTERS amp TOP P N 64946 HARDWARE BAG 7 8 9 10 11 12 13 14 amp 17 1 2 3 16 15 6 5 4 Figure 2 4A Model PS740 24 Triple Oven Option Base with Outriggers and Top 11 P N 60250 September 28 2012 ITEM NO QTY PART NO DESCRIPTION 1 1 66159 COMPLETE BASE WELDMENT 2 4 45209 QUAD OUTRIGGER WELDMENT 3 2 22290 0010 SWIVEL CASTER FLAT PLATE 4 2 22290 0009 SWIVEL CASTER FLAT PLATE W BRAKE 5 4 45206 INSERT QUAD ADJUSTMENT FOOT 6 4 45205 SPACER QUAD CASTER 7 32 A27727 3 83 16x1 1 4 HEX BOLT 8 32 A21924 3 83 FLAT WASHER SS 9 32 21422 0001 3 83 SPLIT LOCK WASHER ZP 10 16 21172 0004 3 83 16 NYLON INSULATED LOCKNUT ZC 11 8 2001048 1 23 13 x 1 3 8 18 8 HEX CAPSCREW 12 8 A27750 1 23 18 8 FLAT WASHER 13 8 21422 0016 1 23 18 8 LOCK WASHER 14 2 59677 SCR MS SL TR HD 10 32X2 1 2 15 1 22450 0228 REST
19. 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 I2H I2L I2E I2E I3B P I3 Pressure Input G20 0 120 20 20 20 11 21 22 36 3 05 mm mbar mbar mbar mbar kW hr G25 0 120 25 16 19 22 36 3 05 mm mbar mbar kW hr G30 0 075 29 or 50 28 30 37 26 2 22 59 1 9 mm mbar or 50 mbar mbar kW hr 3 P N 60250 September 28 2012 SECTION 2 INSTALLATION WARNING After any conversions readjustments or service work on the oven Perform a gas leak test Test for proper combustion and gas supply 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 o
20. OWNER S OPERATING AND INSTALLATION MANUAL for domestic and standard export ovens 2012 Middleby Marshall Inc is a registered trademark of Middleby Marshall Inc All rights reserved Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 847 741 3300 FAX 847 741 4406 PS740 Series Gas Ovens P N 60250 September 28 2012 PS740 Series Gas Domestic amp Std Export ENGLISH Model Combinations PS740G Gas Single Oven Double Oven Two Stack Triple Oven Three Stack II P N 60250 September 28 2012 RETAIN THIS MANUAL FOR FUTURE REFERENCE Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 USA 847 741 3300 FAX 847 741 4406 www middleby com 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 Installation section of this Manual For domestic and standard export ovens instru
21. RAINT CABLE ASSEMBLY 16 1 59560 TOP COVER 17 2 7A2S15 SCR MS STR TRSHD 10 32X3 4 PARTS LIST FOR PS740 SERIES 32 TRIPLE OVEN OPTION BASE w CASTERS amp TOP P N 66164 HARDWARE BAG 7 8 9 10 11 12 13 14 amp 17 1 2 3 16 15 6 5 4 Figure 2 4B Model PS740 32 Triple Oven Option Base with Outriggers and Top 12 P N 60250 September 28 2012 III VENTILATION SYSTEM 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 IN AUSTRALIA COMPLIANCE TO REGULATIONS AS5601 AG601 IS MANDATORY The rate of air flow exhausted through the ventilation system may vary depending on the oven configuration and hood de sign 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 temperature controlled for summer and winter Return air can also be brought in
22. ROM 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 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 per sonnel 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 merchantability or of fitness for a particular purpose The foregoing shall be Seller s sole and exclusive obliga tion and Buyer s sole and exclusive remedy for any action including 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 2012 Middleby Marshall A Middleby Company The Middleby M
23. RSHALL AUTHORIZED SERVICE AGENT TO INSTALL AND PERFORM MAINTENANCE 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 manufacturer 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 III P N 60250 September 28 2012 MIDDLEBY MARSHALL INC OVEN LIMITED WARRANTY Non U S A The Seller warrants equipment manufactured by it to be free from defects in material and workmanship for which it is responsible The Seller s obligation under this warranty shall be limited to replacing or repairing at Seller s option without charge F O B Seller s factory any 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 per
24. STRAINT CABLE ASSEMBLY 9 1 61125 TOP COVER 10 2 59677 SCR MS SL TR HD 10 32 2 1 2 11 2 7A2S15 SCR MS STR TRSHD 10 32 3 4 PARTS LIST FOR PS740 SERIES 24 DOUBLE OVEN OPTION BASE w 6 LEGS amp TOP P N 67028 HARDWARE BAG 5 6 7 10 amp 11 1 2 4 9 8 Figure 2 3A Model PS740 24 Double Oven Option Base with Legs and Top 9 P N 60250 September 28 2012 ITEM NO QTY PART NO DESCRIPTION 1 1 66159 COMPLETE BASE WELDMENT 2 4 66853 TOP PLATE LEG WELDMENT 4 4 58930 SWIVEL CASTER FLAT PLATE 5 32 2000531 3 8 16 1 HEX SCREW SST 6 32 21416 0001 3 8 FLAT WASHER SS 7 32 21422 0001 3 8 SPLIT LOCK WASHER ZP 8 1 22450 0228 RESTRAINT CABLE ASSEMBLY 9 1 59560 TOP COVER 10 2 59677 SCR MS SL TR HD 10 32 2 1 2 11 2 7A2S15 SCR MS STR TRSHD 10 32 3 4 PARTS LIST FOR PS740 SERIES 32 DOUBLE OVEN OPTION BASE w 6 LEGS amp TOP P N 67026 HARDWARE BAG 5 6 7 10 amp 11 1 2 4 9 8 Figure 2 3B Model PS740 32 Double Oven Option Base with Legs and Top 10 P N 60250 September 28 2012 ITEM NO QTY PART NO DESCRIPTION 1 1 64943 COMPLETE BASE WELDMENT 2 4 45209 QUAD OUTRIGGER WELDMENT 3 2 22290 0010 SWIVEL CASTER FLAT PLATE 4 2 22290 0009 SWIVEL CASTER FLAT PLATE W BRAKE 5 4 45206 INSERT QUAD ADJUSTMENT FOOT 6 4 45205 SPACER QUAD CASTER 7 32 A277
25. arshall 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 IV P N 60250 September 28 2012 NOTE Wiring Diagrams are in Section 5 of this Manual The diagram for each oven is also on the lower inner surface of its Control Console Page SECTION 1 DESCRIPTION 1 I OVEN USES 1 II OVEN COMPONENTS 1 A Conveyor Motor Drive 1 B Crumb Pans 1 C Conveyor 1 D End Plugs 1 E Eyebrows 1 F Window 1 G Machinery Compartment Access Panel 1 H Serial Plate 1 I Control Panel 1 J Photo Cell 1 K Gas Burner 1 L Blowers 1 M
26. ary adjust the belt ten sion by turning the conveyor adjustment screws 19 Replace all components onto the oven Figure 4 4 Disassembling the idler shaft Figure 4 5 Drive shaft configurations 26 P N 60250 September 28 2012 Figure 4 6 Disassembling the drive shaft 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 deflection 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 also 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 Figure 4 7 Rear panel access Remove eight 8 screws to remove rear panel Blower belt Bearings 2 total Blower motor Loosen four 4 screws to adjust mo tor position and belt tension IV MAINTENANCE EVERY 6 MONTHS A Check that the oven is cool and the power is disconnected as described in the warning at the beginning of this Section B 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 C For gas ovens i
27. as sembled incorrectly after cleaning Turn oven off and allow to cool Reassemble fingers correctly Oven is operating but little or no air is coming from the fingers Oven is not up to operating temperature Conveyor may be jammed Allow oven to preheat Turn oven off and allow to cool Check conveyor for blockage Conveyor will not move SYMPTOM PROBLEM SOLUTION Clean and replace the front fan filters Failure to do this will eventually shut down the oven due to excessive temperature High Control Compartment Temperature The computer has detected a problem with either the main or burner blowers This should be corrected by a qualified service technician Main Blower problem or Combustion Blower problem SCREEN ALERTS Control Over Temp Front filters are clogged Clean or replace filters Front belt jammed Front belt has stopped Remove obstruction and restart oven If no obstruction call service Rear Belt jammed Rear belt has stopped Remove obstruction and restart oven If no obstruction call service High Temp Error Thermocouple or Call service PLC malfunction Belt off Oven not Normal operation until in temperature Oven reaches operating temperature Energy Saving Mode 1 Normal operation Energy saving mode 2 Normal Operation Energy
28. bs 522kg Rated Heat Input 99 000 BTU 25 000kcal 29 kW hr 99 000 BTU 25 000kcal 29 kW hr Maximum Operation Temperature 600 F 315 C 600 F 315 C Air Blowers Two Blowers at 1900 RPM Two Blowers at 1900 RPM Warmup Time 15 min 15 min Table 1 3 Electrical specifications for PS740G 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 1 gd Table 1 4 Gas orifice and pressure specifications for PS740G gas ovens Gas Main Orifice I D Supply Inlet Orifice Manifold Bypass Type PS740G Pressure Pressure Pressure Natural 0 1065 0 120mm 8 12 W C 19 9 29 9mbar 3 5 W C 8 7mbar 0 25 0 3 W C 0 6 0 8 mbar Propane 0 067 1 9mm 11 14 W C 27 4 34 9mbar 10 0 W C 24 9mbar 0 9 1 0 W C 2 2 2 5 mbar IMPORTANT Additional electrical information is provided on the oven s serial plate and on the wiring diagram inside the machinery compartment NOTE 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 GAS ORIFICE AND PRESSURE SPECIFICATIONS PER OVEN CAVITY CE OVENS Supply Inlet Pressure IT PT ES SE Main UK CH IT
29. 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 Connect the inside master links Check that the links are oriented as shown in Figure 2 15 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 Replace the conveyor into the oven Figure 2 15 Conveyor and Master Link orientation E Final Assembly 1 Install the crumb trays underneath the conveyor as shown in Figure 2 16 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 Remove 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 as
30. ctions 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 EMERGENCY 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 instructions thoroughly before installing or servicing this equipment WARNING DO NOT SPRAY AEROSOLS IN THE VICINITY OF THIS APPLIANCE WHILE IT IS IN OPERATION 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 MA
31. d 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 the conveyor frame With the screws removed lift the end of the shaft at the front of the oven and pull the entire as sembly free of the conveyor frame The brackets will be removed along with the drive shaft assembly 12 Disassemble and lubricate the two sections of the drive shaft as described for the idler shaft above 13 Before reassembling the shafts into the conveyor frame check that they are oriented properly 14 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 15 Replace the drive sprockets Reassemble the belts and master links onto the conveyor 16 Reinstall the end plugs and conveyor onto the oven 17 Reattach the drive chains Replace the chain cover 18 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 necess
32. f 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 con struction 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 NOTE 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 require ments 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 NFPA70 NOTE In Canada the oven installation must conform with local codes I
33. formed 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 authorized 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 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
34. h 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 If 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 Figure 2 13 Conveyor placement Figure 2 14 Conveyor Belt tension Folded frame Crumb tray support bracket End plug Conveyor placed in oven Adjustment screws 2 on idler end of conveyor Idler end with belt tension adjustment screws Drive end with drive sprocket 1 25mm verti cal deflection 16 P N 60250 September 28 2012 5 If it is necessary to add or remove conveyor links to achieve the correct tension OR 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 Remove the conveyor assembly from the oven and place it flat on the floor Remove the master links using long nose pliers Then roll up the belt along the length of the conveyor frame Add or remove belt links as necessary to achieve the correct belt tension Replace the belt on the
35. he National Electrical Code CSA C22 2 the Australian Code AG601 or other applicable regulations NOTE The electric supply connection must meet all national and local electrical code requirements Check the oven serial plate before making any electric supply connections Electric supply connections must agree with data Figure 2 16 Crumb Trays Crumb tray insertion Direction of travel CORRECT master link position Incorrect master link position 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 17 P N 60250 September 28 2012 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 cop per 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
36. ith 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 10 32 3 4 screw length Top panel Figure 2 11 Installing the Restraint Cable Wall of structure Restraint cable assembly 3 4 19mm eyebolt 3 8 18 1 eyebolt on rear leg extension 10 32 2 1 2 screw length 15 P N 60250 September 28 2012 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 underside 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 wit
37. 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 Model No Mod le No Serial No Seri No Installation Date Date d installation 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 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 ANY PART FOUND TO BE DEFECTIVE AND ANY LABOR AND MATE RIAL 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 F
38. move 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 Figure 4 1 Cooling Vents and Grills 24 P N 60250 September 28 2012 II 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 Sec tion 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 conveyor sprocket D Slide the conveyor out of the oven folding it as it is removed 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 T2 T3 T4 T5 T6 Bottom Row B1 B2 B3 B4 B5 B6 G Disassemble the air fingers as shown in Figure 4 3 AS EACH FINGER IS DISASSEMBLED WRITE THE LOCA TION CODE FOR THE FINGER ON ALL THREE OF ITS PIECES This will help you in correctly reassembling the air fingers CAUTION
39. n 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 C22 2 NOTE In Australia the oven installation must conform with local codes In the absence of local codes gas oven installations must conform with the requirements of AS5601 AG601 Gas Electricity and any other relevant statutory regulations 4 P N 60250 September 28 2012 3 2 4 6 5 1 PARTS LIST FOR SERIES PS740 GAS OVEN INSTALLATION KIT P N 61452 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 61823 CONVEYOR END STOP 3 1 31461 CONVEYOR LEFT REAR STOP 4 1 42612 SERVICE AGENCY DIRECTORY 5 1 22500 0080 LABEL MM 6 1 51054 ASSY HANDLE amp DOOR Figure 2 1A PS740 Series Gas Oven Installation Parts PS740 24 OVEN INSTALLATION REQUIRED KITS AND EQUIPMENT PS740 PS740 PS740 PS740 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 N61452 P
40. ne to natural gas Use the appropriate Middleby Gas Conversion Kit for the specific oven model CAUTION The terms of the oven s warranty require all start ups conversions and service work to be performed by a Middleby Authorized Service Agent D PS740 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 assemblies with the LP units and replace the manifold assembly Reconnect the union E Adjusting the Maximum Pressure Setting 1 Disconnect pressure feedback connection if applicable 2 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 Figure 2 19 Gas Burner Assembly Figure 2 18 Flexible Gas Hose Installation Gas Burner Manifold Pressure Tap To Gas Supply Pipe 90 Elbow Quick disconnect device Flexible Gas Hose Full Flow Gas Shutoff Valve 3 4 gas pipe nipple 3 4 1 2 gas pipe reducer Individual gas connection for each oven cavity 1 2 gas pipe ni
41. nspect and clean the burner nozzle and the spark electrode assembly D Check the conveyor drive shaft bushings and spacers Replace the components if they are worn 27 P N 60250 September 28 2012 V KEY SPARE PARTS Available separately See Figure 4 8 KEY SPARE PARTS PS740 GAS ITEM QTY P N DESCRIPTION 1 1 60190 Digital Display Programmed 2 1 58920 Motor Conveyor Drive 3 1 58679 Conveyor Control Board 4 1 60194 Inverter Programmed 5 1 M9608 Power Supply 6 1 60196 Kit Thermocouple 7 1 97525 Fan Cooling Control 8 1 51399 Fan Cooling Rear 9 1 62044 Air Switch 10 1 57288 Motor Blower 11 1 61602 Ignition Module 12 1 60679 Assy Valve Gas Modulating 13 1 60671 Board Signal Cond 0 15VDC 14 1 33983 High Limit Control Module 240V 15 2 32108 Transformer 240Vp 24Vs 16 1 60684 Control C14RS Programmed 17 1 58668 Thermocouple Module 18 1 58669 Current Module 19 1 60250 PhotoCell 20 2 59132 Relay DPDT 24V Coil 21 1 59668 Belt Blower 22 1 62288 Ignitor Single Rod 23 1 50240 Ignition Cable 25 24 1 64106 Bearing PB 5 8 B Figure 4 8 Key Spare Parts 1 2 3 4 5 15 10 16 17 18 19 20 21 22 23 24 28 P N 60250 September 28 2012 SECTION 5 WIRING DIAGRAM Middleby Marshall Model Number G208 240 Volt 50 60 Hz 1 Phase 59324 Rev E 29 P N 60250 September 28 2012
42. ntil 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 com ponents function correctly NOTE The installer MUST verify oven operation prior to put ting oven into service H Maintenance It is recommended to check yearly the minimum and the maxi mum setting and readjust them if necessary Figure 2 20 Burner Assembly Figure 2 21 Gas Valve Adjustment Screw 5 mm for minimum pressure setting Adjustment Screw 8 mm for maxi mum pressure setting 20 P N 60250 September 28 2012 SECTION 3 OPERATION I 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 C Temperature Control Display A Main On Off Button B Conveyor Time Setting C Temperature Control Display E Energy Level Indicators E Energy Level Indicators D
43. pple 1 2 gas line tee with pressure tap 3 Make sure that the appliance is in operation and the Mo duplus coil is energized with maximum current 4 If maximum rate pressure needs adjustment use an 8 mm wrench to turn adjustment screw for maximum pres sure 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 applicable 8 If minimum and maximum pressures are set wire the Moduplus in circuit 9 Close pressure tap screw 19 P N 60250 September 28 2012 F Adjusting the Minimum 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 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 If minimum rate pressure needs adjustment use a 5 mm wrench to turn adjustment screw for minimum pressure setting clockwise to increase or counter clockwise to decrease pressure u
44. re in excess of psi 3 45 kPa 2 The oven must be isolated from the gas supply piping system by closing its individual manual shutoff valve dur ing any pressure testing of the gas supply piping system at test pressure equal to or less than psi 3 45 kPa 3 If incoming pressure is over 14 W C 35mbar a separate regulator MUST be installed in the line BEFORE the individual shutoff valve for the oven WARNING 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 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 One or two cavities 750 cfh meter Three oven cavities 1200 cfh meter Gas Line DEDICATED LINE from the gas meter to the oven 2 50 8mm pipe for natural gas 2 50 8mm pipe for propane Maximum length 2002 61m Each 90 elbow equals 7 2 13m of pipe 18 P N 60250 September 28 2012 B Connection Check the oven s gas supply requirements before making the gas utility connection Gas supply requirement are listed on the oven s se
45. rial 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 regula tions 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 installation 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 2 for a list of the installation standards In addition because the oven is equipped with casters 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 disconnect 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 propa
46. sembly 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 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 Remove 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 loosening 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 Authorized installation personnel normally ac complish the connections for the ventilation system electric supply and gas supply as arranged by the customer Following these connections the factory authorized installer can perform the initial startup of the oven NOTE The electric supply installation must satisfy the require ments of the appropriate statutory authority such as t
47. ven 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 Project hot air from the burner or heating element to the air fingers M Air Fingers Project streams of hot air onto the food product SECTION 1 DESCRIPTION Figure 1 1 Oven Components 2 P N 60250 September 28 2012 I OVEN SPECIFICATIONS Table 1 1 Dimensions Single Oven Double Oven Triple Ove 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 15 381mm or 2 15 381mm or 2 15 381mm Shortened Exit Conveyor 24 Single Oven Double Oven Triple Ove Overall Depth 52 75 1340mm 52 75 1340mm 52 75 1340mm Overall Length 69 1753mm 69 1753mm 69 1753mm All other dimension are the same 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 PS740 GAS 32 Belt 24 Belt Weight 1150 lbs 522kg 1150 l
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