Vulcan-Hart VPX5 126588 User's Manual
Contents
1. Page 17 of 20 F25111 March 2002 VPX SERIES STEAMER ELECTRICAL OPERATION 480V D O g 2 N 2 2 z 5 F O 2 COOKING MODE uxu THREE PHASE CONNECTION AMPS 10 9 480 15 181 DERIVED FROM VPX3 amp VPX5 18 TRANSFORMER 480 240Y 100VA 3E 15028 REV 1 COUNTERTOP STEAMER 480V 7265 F25111 March 2002 Page 18 of 20 VPX SERIES STEAMER TROUBLESHOOTING TROUBLESHOOTING WARNING CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TESTS OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE EXERCISE EXTREME CAUTION AT ALL TIMES IF TEST POINTS ARE NOT EASILY ACCESSIBLE DISCONNECT POWER ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST SYMPTOM Compartment leaks water around door po POSSIBLE CAUSES Steamer not level Steamer overfilled Steam leaks around door Worn gasket See DOOR in SERVICE PROCEDURES AND ADJUSTMENTS Damaged gasket Steam vent pipe blocked Steam generated inside compartment when timer is off Timer malfunction Contactor malfunction Temperature control malfunction heater light on Steamer will not heat heat light off Line voltage incorrect Control circuit fuse s open High limit thermostat open low water light off Door open or door switch malfunction Cooking mode switch off or inoperative Relay R1 malfunction Timer malfunction timed mode only Temperature p2. e 2 5 gallons to fill holding pan approximate NOTES 1 Amperage values in the table are nominal Electric AMPERAGE PER LINE 60HZ MODEL son 3 PHASE 1 PHASE 208V 240V 480V 208V 240V 9 0std 25 0 21 7 10 9 433 37 5 VPX3 6 0 28 9 25 0 15 0 std 41 7 36 1 18 1 72 2 62 5 VPX5 10 0 48 1 41 7 Tolerance is 5 10 2 All models are shipped for three phase connections If a single phase connection is needed the steamer is field convertible Requires jumper wire changes at terminal block See wiring diagram 7264 3 Field convertible to a reduced kw output 2 3 power connection Requires jumper wire changes at terminal block See wiring diagram 7264 TOOLS Standard e Standard set of hand tools e Clear silicone sealant e VOM with an AC current tester any quality VOM with a sensitivity of at least 20 000 ohms per volt can be used e Temperature meter amp thermocouple Special e Thermal Transfer Compound Dow Corning 340 P N 819643 2 or equivalent NOTE The additional tools below are required if replacing heating element assembly e Torque wrench in Ib e Tile Trowel 3 16 x 5 32 V notch Grainger catalog stock number 5LG08 or equivalent e Loctite 271 or equivalent F25111 March 2002 VPX SERIES STEAMERS REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS WARNING D
3. SEA LEVEL SET POINT SHOWN 7252 F25111 March 2002 VPX SERIES STEAMER ELECTRICAL OPERATION ELECTRICAL OPERATION Buzzer iili Contactor Relay R1 Transformer Heater Light green Low Water Light red Cooking Mode Switch with pilot lights Door Switch High Limit Thermostat COMPONENT FUNCTION Signals end of a cook cycle when cooking time expires Supplies line voltage to heating element assembly Supplies power to temperature control Provides 240V to the control circuit 480V only Indicates steamer is heating Indicates additional water is required in cooking compartment Supplies 240V to the control circuit Two internal pilot lights indicate the cooking mode selected Timed mode is amber Continuous mode is red Removes control circuit power from steamer when door is opened Protects steamer by removing control circuit power if the heating element assembly temperature goes above 350 F 15 50 F differential Monitors temperature probe and cycles power to heater contactor for steam generation Maintains steamer at a standby temperature of 168 F 5 8 when cook timer is off timed mode only Counts cook time of product when time is dialed and energizes buzzer when time expires To silence buzzer dial must be turned to off Senses cooking compartment temperature and sends a corre
4. Daily cleaning is required INTRODUCTION Features e Requires no water or drain line connections manual fill amp manual drain e Cast aluminum element block for efficient heat transfer and distribution e Field convertible to single phase or three phase power e When wired for single phase a reduced 2 3 power output is available Steam Cooking The VPX series steamer provides timed or continuous mode cooking in a pressure less compartment The small physical size of the steamer offers an efficient way to produce many foods in small batches Pressure less convection steam cooking will steam cook fresh foods or will steam defrost and cook frozen foods providing the maximum color flavor and nutritional value with the least expenditure of energy and labor The pressure less cooking compartment allows the operator to open and close the door anytime during a cooking cycle Model Designations e VPX3 3pan capacity e VPX5 5pan capacity based on 2 5 inch pan depth Exterior Dimensions e VPX3 21 wx 25 d x 25 h e VPX5 21 w x 25 d x 31 5 h Includes 4 legs and 2 steam vent height SPECIFICATIONS Water Requirements Use potable tap water that meets the following specifications Page 3 of 20 e Hardness of 2 3 grains 34 35ppm e Total dissolved solids TDS less than 60ppm e Ph factor of 7 0 to 7 5 These specifications can easily be obtained with the use of a properly maintained water softener
5. Internal pilot light top amber goes out NOTE Standby thermostat does not effect continuous mode operation and the cook timer is not used 5 Temperature reaches set point and the temperature control s internal relay contacts open A Contactor de energized and power is removed from heating elements 6 Steamer continues to cycle on the temperature control until the cooking mode switch is turned to off or timed or the door is opened NOTE If water level becomes low during cycling high limit thermostat will open and low water light red will come on F25111 March 2002 Page 16 of 20 VPX SERIES STEAMER ELECTRICAL OPERATION WIRING DIAGRAMS 208 240V 12 AWG CONTINUOUS COOKING MODE SWITCH SELECT AS REQUIRED mu sono et ELEMENT ASSEMBLY 208V Gk ELEMENT ASSEMBLY 205V 15i ELEMENT ASSEMBLY 240V Siw ELEMENT ASSEMBLY 240v 19 W 3 RSH LIT THERUOSTAT PLOT LAMP RED LOW WATER EQ x c f L x 2 X UxuQx LEX WL SINGLE PHASE SINGLE PHASE THREE PHASE 2 3 CONNECTION CONNECTION CONNECTION OPTIONAL REDUCED KW STANDARD THER 60 MiNGOOrU hojami 11 SMTCH ON OFF DPDT COOKING MODE AMPS Volts kw 1 PH 2 5 1 PH 3 PH 208 9 289 433 250 208 15 481 722 417 2140 15 VPX3 amp VPX5 DERIVED FROM COUNTERTOP STEAMER 3E 15027 REV 1 208V 240V 7264
6. At are ela ed TOOIS2z simtos A tads fui galu ae tel ue TOW A A gada PS E REMOVAL AND REPLACEMENT OF PARTS aaa Covers and Panels aeae a uu E uer ue X P RA EUR ae saga Component Panel Components 0 hh MINUTI Standby Thermostat l heh hn High Limit Thermostat suu rsh Oates Le x at ie e M eee a K ur FH ERU P Temperature Probe s uius seanss Ple oa beeen beeen a Heating Element Assembly teeta Manual Brain ValV 9 2 6 08 vac n haa aaa dyed a Ste he ieee a eae ae eee Bhd beach iG ed ti Aube ud td ls la Rebeca oe SERVICE PROCEDURES AND ADJUSTMENTS 00 0 cece cette eee eee Door Latch Adjustment aaa Door Sealing Adj stment sre re ita tl Shey ay efoto bes Heating Element Test ue ex unes DRE Parsee ied Pee a pare i e xe Temperature Control Calibration 1 eee eee ELEG TRIGAL OPERATION seit th ne a Ware as Component Function a lt paduses K o ee ete se Seales Component Location teens Sequence of Operation ooooccccoo eee Wirin DiagtamS e03 tres agdistjk v audi da ade dial ida i TROUBLESHOOTING 3 1 2 Kaa gts skat ts a eov a ag ete ee de oed CONDENSED SPARE PARTS LIST eideann noi ei a ei de a a a a i a a Da Vulcan 2002 F25111 March 2002 _ Page 2 of 20 VPX SERIES STEAMERS GENERAL GENERAL INSTALLATION OPERATION AND CLEANING Refer to the Installation amp Operation Manual for specific instructions NOTE
7. Install a replacement drain valve A Tighten valve body so that actuator stem is pointing towards front of steamer 10 Reverse procedure to re assemble from step 6 and check steamer for proper operation Page 9 of 20 DOOR WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED Removal 1 Remove top cover as outlined under COVERS AND PANELS 2 Open the door Pull hinge rod up Reverse procedure to install making sure the door bushings are in place TOP DOOR HINGE HINGE ROD F25111 March 2002 VPX SERIES STEAMERS REMOVAL AND REPLACEMENT OF PARTS Gasket 1 Open the door 2 Remove screws from the gasket plate 3 Pull the gasket plate out from the door housing and remove the gasket 4 Position the new gasket on the gasket plate and reverse the procedure to install Adjust the door as outlined under DOOR SEALING ADJUSTMENT NOTE Do not over tighten gasket plate screws as this will compress the gasket excessively and interfere with proper door sealing REMOVE O SCREWS N ZN REMOVE GASKET PLATE A FN v EZ y d N GASKET ES N S NU ved TSP703C Handle M E INNER DOOR PANEL 4 Remove the nuts and spacers from the handle screws and r
8. See table below for proper values 2 If current draw is not correct turn cooking mode switch to OFF and disconnect the electrical supply a Replace heating element then proceed to step 3 C If unable to check current draw a resistance check may indicate a malfunctioning element 1 Turn the cooking mode switch to OFF and disconnect the electrical supply 2 Remove the lead wires from the heating element and check resistance ohms See table below for proper values 3 Check for proper operation Page 12 of 20 VPX SERIES STEAMER SERVICE PROCEDURES AND ADJUSTMENTS VOLTAGE KW PER EE OHMS PER ELEMENT og pg ELEMENT 208 3 144 83 144 240 3 12 5 7 2 19 2 480 3 3 6 76 8 208 5 24 0 14 0 8 70 240 5 21 0 12 0 11 5 480 5 6 0 46 0 NOTES 1 Values in the table are nominal Tolerance is 5 10 2 Voltage values are 60HZ 3 Each heating element assembly contains 3 elements Total KW would be the individual element KW times 3 4 Resistance values ohms are room temperature ELEVATION TEMPERATURE FT CF Sea Level 210 1 000 208 2 000 206 3 000 204 4 000 202 5 000 200 6 000 198 7 000 196 8 000 195 9 000 or above 194 TEMPERATURE CONTROL CALIBRATION To set the temperature control for optimum steamer operation the elevation above sea level for the service location must first be determined The elevation i
9. below set point internal relay contacts close 1 Heater light green comes on 2 Contactor energized and heating elements are powered 4 Temperature reaches 168 F and standby thermostat opens A Internal pilot light top amber goes out NOTE Steamer will maintain standby temperature until a cook time is dialed on timer or the cooking mode switch is turned to off or continuous or the door is opened B Relay R1 de energized 1 R1 2A amp R1 2B return to N C position Page 15 of 20 2 R1 3A amp R1 3B return to N O position a Temperature control de energized and internal relay contacts open a Contactor de energized and power removed from heating elements Set cook timer to desired time A Timer contacts 1 amp 3 close timer motor is energized and timing down begins NOTE Additional time can be set or the cook timer can be turned off throughout the cooking cycle If turned to off steamer reverts to standby temperature Temperature reaches set point and the temperature control s internal relay contacts open A Contactor de energized and power is removed from heating elements Steamer cycles on the temperature control until cook time expires Time expires on cook timer A Timer contacts 1 amp 3 open timer motor is de energized and timing stops B Timer contacts 1 amp 4 close 1 Buzzer energized and sounds NOTE The buzzer continues to sound unti
10. high 3 Grasp component panel and remove screws limit or damage to the mounting threads may occur securing it to the base TEMPERATURE PROBE A Lower component panel and leave at the side of steamer so that all the component lead wires can remain connected WARNING DISCONNECT THE ELECTRICAL COMPONENT PANEL POWER TO THE MACHINE AT THE MAIN LOWERED i AA X CIRCUIT BOX PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED 1 Remove all covers and panels as outlined under COVERS AND PANELS 2 Disconnect probe leads from the temperature control 3 Remove temperature probe from steam vent 4 Remove screws securing base to steamer 4 Reverse procedure to install replacement probe support frame 5 Adjust temperature control as outlined under TEMPERATURE CONTROL CALIBRATION in SERVICE PROCEDURES AND ADJUSTMENTS HEATING ELEMENT ASSEMBLY WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED The heating element assembly contains three elements molded into a cast aluminum block The block is mounted on the underside of cooking compartment F25111 March 2002 _ Page 6 of 20 VPX SERIES STEAMERS REMOVAL AND REPLACEMENT OF PARTS a STEAMER BASE COMPONENT PANEL SCREWS BASE SCREWS 5 Remove mounting nuts am
11. IES STEAMER CONDENSED SPARE PARTS LIST CONDENSED SPARE PARTS LIST VPX3 amp VPX5 PART NUMBER DESCRIPTION NOTES 844385 Door Gasket VPX5 844196 Door Gasket VPX3 843811 Door Switch 853928 Thermostat Temperature Control 853956 Thermostat Standby 853948 Thermocouple Sensor J Type 853957 Fuse Block 851929 Fuse 1Amp 250v 208 240v 853270 Contactor 208 240v 853493 High Limit Thermostat 844422 Power Switch cooking mode switch 853946 Element assy 208v 9kW 853945 Element assy 208v 15kW 853212 Element assy 240v 9kW 853213 Element assy 240v 15kW 411690 2 Timer 60 min F25111 March 2002 Printed in U S A
12. ISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED Right Side Panel 1 Remove screws from bottom of panel RIGHT SIDE 2 Slide panel down to clear top cover 3 Reverse procedure to install Top Cover 1 Remove screws from the top rear of cover IS REAR view 2 Push up on rear of cover to clear steam vent pipe and slide forward to clear the front lip 3 Lift the cover off the cabinet 4 Reverse procedure to install Left Side and Rear Panel 1 Remove top cover as outlined under TOP COVER Disconnect electrical supply at terminal block Remove screws at bottom of panel F25111 March 2002 REAR amp LEFT SIDE VIEW REMOVE SCREWS 4 Pull the combination left side and rear panel off 5 Reverse procedure to install Lower Front Cover 1 Remove screws from the lower front cover 2 Open the door cut the bead of silicone at the top rear of cover then remove cover Clean silicone residue from mating surfaces 4 Reverse procedure to install and apply silicone sealant at the top rear of cover COMPONENT PANEL COMPONENTS WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED 1 Remove right side panel as outlined under COVERS AND PANELS 2 Disconnect lead wires to component
13. NT Should the steamer door jam and can not be opened DO NOT FORCE OR PRY the door as damage will occur First try lifting up on the bottom of the door at the handle end to disengage the latch If that does not work remove the right side panel The striker that catches on the door latch is located behind the front face of the cooking cavity Remove the nut from the striker and this will release it from the panel Once the nut and washer have been removed door will open freely Page 11 of 20 Remove any burrs on the striker that may cause the latch to stick Reinstall the striker and adjust so door will not jam REMOVE STRIKER NUT F25111 March 2002 VPX SERIES STEAMER SERVICE PROCEDURES AND ADJUSTMENTS To adjust 1 Reinstall the striker with the slot pointing upwards and hand tighten nut only 2 Close the door to center the striker in the oval mounting hole 3 Open the door and check the strikers slot for horizontal alignment The slot on the striker must be kept horizontal in order for the door latch to catch it properly and latch il DOOR STRIKER ALIGNMENT POSITION SLOT HORIZONTALY i i Ji 3457 4 Once the proper slot alignment has been set hold the striker close to its base using a rag and vise grips then tighten the striker nut Be careful not to damage the striker slot when tightening or door may not latch properly NOTE Do not over tigh
14. VULCAN SERVICE MANUAL VPX SERIES ELECTRIC COUNTERTOP STEAMERS MODEL ML VPX3 126586 VPX5 126588 NOTICE This Manual is prepared for the use of trained Vulcan Service Technicians and should not be used by those not properly qualified If you have attended a Vulcan Service School for this product you may be qualified to perform all the procedures described in this manual This manual is not intended to be all encompassing If you have not attended a Vulcan Service School for this product you should read in its entirety the repair procedure you wish to perform to determine if you have the necessary tools instruments and skills required to perform the procedure Procedures for which you do not have the necessary tools instruments and skills should be performed by a trained Vulcan Service Technician Reproduction or other use of this Manual without the express written consent of Vulcan Hart is prohibited A product of VULCAN HART LOUISVILLE KY 40201 0696 F25111 March 2002 VPX SERIES STEAMERS TABLE OF CONTENTS GENERAL licita an e Ratha gan PE AAA AAA Pipes AA ut tb Dosis Installation Operation and Cleaning Rh INTOdUCUON At Puer ec eh Be ned aa a S wr Pits a a A star c Kc RE Steam Cooking iius meii ee a IA SIE A Penes AREA OIL emo rr Rae A a be Model Designations aaa Specifications 24 r u dj das rs Water Requirements aaa EIS CIC oe S tt dead date M A eU al dd Mut ny na fak
15. being replaced 3 Remove component NOTE To remove temperature control pull knob off and remove nut from shaft Page 4 of 20 VPX SERIES STEAMERS REMOVAL AND REPLACEMENT OF PARTS 4 Reverse procedure to install replacement component and check steamer for proper operation NOTE If replacing temperature control see TEMPERATURE CONTROL CALIBRATION ADJUSTMENT FOR ELEVATION in SERVICE PROCEDURES AND ADJUSTMENTS WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED 1 Remove right side panel as outlined under COVERS AND PANELS Disconnect lead wires to timer Loosen two set screws on dial and pull timer knob from shaft Remove nut from timer shaft and remove timer Reverse procedure to install STANDBY THERMOSTAT WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED 1 Remove right side panel as outlined under COVERS AND PANELS 2 Pull insulation back to expose standby thermostat and disconnect lead wires Page 5 of 20 a 4 MOUNTING BRACKET EXTERIOR OF COOKING COMPARTMENT _ 3 Grasp thermostat body and push up to slide holding tabs out from mounting bracket 4 Apply asmall amount of thermal transfer compound to the mating surface disk side of the replacemen
16. emove the handle from the door NOTE When installing the spacers the smaller diameter fits into the slot in the door and the latch lever must rest on top of the handle latch screw T gt gt a wi 4 a HANDLE HANDLE LATCH SCREW SPACERS 1 Open the door 2 Remove screws from the top and bottom of the door 3 Pull the inner door panel out from the door housing with the gasket plate and gasket still attached F25111 March 2002 457 833 5 Reverse procedure to install Page 10 of 20 VPX SERIES STEAMER SERVICE PROCEDURES AND ADJUSTMENTS Latch Assembly 1 Open the door 2 Remove screws from the top and bottom of the door 3 Pull the inner door panel out from the door housing with the gasket plate and gasket still attached 4 Remove the screws from the side edge of the door that secure the latch mechanism and remove the latch from the door 4 v REMOVE il G EC LATCH LEVER 459 835 NOTE When installing the latch lever must rest on top of the handle latch screw 5 Reverse procedure to install SERVICE PROCEDURES AND ADJUSTMENTS WARNING CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE EXERCISE EXTREME CAUTION AT ALL TIMES IF TEST POINTS ARE NOT EASILY ACCESSIBLE DISCONNECT POWER ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST DOOR LATCH ADJUSTME
17. l timer dial is set to off position or additional time is set Turn cook timer off A Steamer reverts to standby temperature and continues to cycle until a cook time is dialed on timer or the cooking mode switch is turned to off or continuous or the door is opened NOTE If water level becomes low during cycling high limit thermostat will open and low water light red will come on Continuous Cooking Mode Conditions A Steamer connected to correct voltage and is properly grounded Cooking mode switch power off High limit thermostat closed Standby thermostat closed moD O 9 Temperature control is setup properly and is ready to use F25111 March 2002 VPX SERIES STEAMER ELECTRICAL OPERATION F Door closed door switch closed Timer off H Cooking compartment filled to the water level mark and below standby temperature of 168 F 5 8 2 Select continuous on the cooking mode switch A Internal pilot light top amber comes on B Internal pilot light bottom red comes on C Relay R1 energized 1 R1 2A amp R1 2B both N C open 2 R1 3A 8 R1 3B both N O close 3 Temperature control energized and evaluates input from thermocouple A With temperature below set point internal relay contacts close 1 Heater light green comes on 2 Contactor energized and heating elements are powered 4 Temperature reaches 168 F and standby thermostat opens A
18. p washers from the rear cooking compartment support legs and remove base REMOVE NUT amp WASHER 1 EACH SIDE 6 Disconnect heating element lead wires from element terminals Page 7 of 20 7 Disconnect high limit thermostat lead wires and remove high limit from heating element assembly DISCONNECT HIGH LIMIT LEAD WIRES amp REMOVE HIGH LIMIT HEATING ELEMENT ASSEMBLY 8 Remove heating element assembly from steamer HEATING ELEMENT ASSEMBLY REMOVE NUTS amp WASHERS FROM MOUNTING STUDS i M 7156 9 Clean Loctite residue from heating element assembly mounting stud threads 10 Apply approximately 4 oz of heat transfer compound to the mating surface side opposite markings on the heating element assembly A Using a tile trowel spread the compound evenly over the surface of the assembly 11 Mount replacement heating element assembly to the underside of cooking compartment F25111 March 2002 VPX SERIES STEAMERS REMOVAL AND REPLACEMENT OF PARTS A Temporarily install a flat washer and nut on all mounting studs Hand tighten only B Tighten each nut to 100 in lb using the sequence as shown d HEATING ELEMENT ASSEMBLY TIGHTENING SEQUENCE o C Remove nut and washer from each mounting stud D Apply Loctite 271 to heating element assembly mounting stud threads E Stack two new spring disk washers Belleville together and ins
19. robe malfunction Temperature control malfunction Steamer will not heat heat light on Line voltage incorrect Heating element malfunction Contactor malfunction Timer motor does not run Door open or door switch malfunction Relay R1 malfunction Timer inoperative Door not closing properly Door latch assembly Striker adjustment Steamer pan not inserted properly Door won t open DIEM EIO OM ON Z OO NOS ROM ZIG O M Latch won t release See DOOR LATCH ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS Buzzer not operating Timer malfunction Buzzer malfunction Water spraying out of steam vent pipe during a cook cycle Temperature control calibration to high See TEMPERATURE CONTROL CALIBRATION ADJUSTMENT FOR ELEVATION in SERVICE PROCEDURES AND ADJUSTMENTS Temperature probe malfunction Temperature control malfunction Contactor malfunction High water usage ZIAN Temperature control calibration to high See TEMPERATURE CONTROL CALIBRATION ADJUSTMENT FOR ELEVATION in SERVICE PROCEDURES AND ADJUSTMENTS Temperature probe malfunction Temperature control malfunction Steamer operating in continuous mode Excessive or inconsistent cook times PON BON Door left open between loads Temperature control calibration to low Heating element malfunction Standby thermostat malfunction Page 19 of 20 F25111 March 2002 VPX SER
20. s used in conjunction with the elevation table below to determine the correct set point temperature for the control NOTE If the set point temperature is too high the excess boiling action will cause water droplets to exit the steam vent pipe and cause high water usage 1 Remove right side panel as outlined under COVERS AND PANELS 2 Place a thermocouple approximately one inch down in the center of steam vent pipe 3 Turn steamer on by selecting continuous mode 4 Allow steamer temperature to stabilize by completing two heating cycles 5 Record the temperature reading when heater light goes out 6 Using the elevation table compare the recorded temperature to the temperature listed for the specific elevation NOTE Use temperature scale on control dial plate for reference only The scale represents dial turns in 1 F increments not the actual temperature When calibrating use the recorded temperature taken from thermocouple Page 13 of 20 A If the set point temperature of the control is correct no adjustment is necessary B If the set point temperature of the control is not correct adjust the temperature control Repeat step 4 until the correct temperature is achieved 1 Turn the temperature control dial clockwise to increase temperature or counterclockwise to decrease temperature cw INCREASE TEMPERATURE CCW DECREASE 190 TEMPERATURE SCALE IS FOR REFERENCE ONLY
21. sponding DC voltage back to the temperature control J type thermocouple COMPONENT LOCATION E B LIGHT TIMER BT F25111 March 2002 RIGHT SIDE SHOWN HEATER T EIL COOKING MODE EN HI LIMIT Ru BUZZER R1 AX y YS A gt Eos CONTROL CONTACTOR DOOR SWITCH STANDBY THERMOSTAT THERMOSTAT FUSES AL SO m gt TD or aa Page 14 of 20 VPX SERIES STEAMER ELECTRICAL OPERATION SEQUENCE OF OPERATION Wiring diagram 7264 will be used to explain the electrical sequence of operation Timed Cooking Mode 1 Conditions A Steamer connected to correct voltage and is properly grounded Cooking mode switch power off High limit thermostat closed Standby thermostat closed mM 2 69 9 Temperature control is setup properly and is ready to use T Door closed door switch closed D Timer off H Cooking compartment filled to the water level mark and below standby temperature of 168 F 5 8 NOTE At temperatures below 168 F the steamer is in a pre heat state 2 Select timed on the cooking mode switch A Internal pilot light top amber comes on B Internal pilot light bottom red comes on C Relay R1 energized 1 R1 2A amp R1 2B both N C open 2 R1 3A 8 R1 3B both N O close 3 Temperature control energized and evaluates input from thermocouple A With temperature
22. t thermostat A Spread the compound completely and evenly over the surface of the thermostat 5 Reverse procedure from step 3 to install and check steamer for proper operation HIGH LIMIT THERMOSTAT WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED 1 Remove right side panel as outlined under COVERS AND PANELS 2 Pull insulation back to expose high limit thermostat and disconnect lead wires RIGHT SIDE SHOWN HIGH LIMIT THERMOSTAT 3 Remove thermostat from heating element assembly F25111 March 2002 VPX SERIES STEAMERS REMOVAL AND REPLACEMENT OF PARTS NOTE Thermostat base is a brass 5 8 hex with a NOTE As the steamer is disassembled remove the threaded stem sheets of insulation from top rear and left side and 4 Apply a small amount of thermal transfer the bottom Retain insulation for use during re assembly compound to the mating surface disk side of the replacement thermostat 1 Remove all covers and panels as outlined A Spread the compound completely and ander Ce VERS ANE PASERO evenly over the surface of the thermostat 2 From the rear tilt steamer until it rests on door 5 Reverse procedure from step 3 to install and A Place wooden blocks opposite door handle check steamer for proper operation to level and support steamer NOTE Do not cross thread or over tighten the
23. tall on each stud 1 Tighten each nut to 45 in Ib using the same sequence as shown 12 Reverse procedure to re assemble from step 7 and check steamer for proper operation MANUAL DRAIN VALVE WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED 1 Remove all covers and panels as outlined under COVERS AND PANELS 2 From the rear tilt steamer until it rests on door F25111 March 2002 A Place wooden blocks opposite door handle to level and support steamer 3 Grasp component panel and remove screws securing it to the base A Lower component panel and leave at side of steamer so that all the component lead wires can remain connected COMPONENT PANEL X LOWERED P NOW x d 7152 4 Remove screws securing base to steamer support frame Qu STEAMER BASE COMPONENT PANEL SCREWS BASE SCREWS Page 8 of 20 VPX SERIES STEAMERS REMOVAL AND REPLACEMENT OF PARTS 5 Remove mounting nuts amp washers from the rear cooking compartment support legs and remove base REMOVE NUT amp WASHER 1 EACH SIDE SUPPORT LEG 6 Remove outer nut on drain valve stem and lift off drain handle assembly 7 Remove manual drain valve from cooking compartment drain pipe 8 Clean thread sealant residue from drain pipe threads and apply new sealant 9
24. ten as the striker will begin to turn and change alignment DOOR SEALING ADJUSTMENT On initial installation of new door gaskets the door will be hard to close This is required for proper gasket fit As the door is used it becomes easier to close after a few days 1 Check the door gasket quality If damaged or worn replace as outlined under DOOR 2 Loosen screws until the screw heads no longer touch the gasket plate 3 Tighten screws until screw head touches gasket plate and at that point begin counting turns Tighten all screws approximately two turns Close the door and check unit for proper operation F25111 March 2002 6 If necessary tighten all screws an additional Y2 turn and repeat step 5 7 Repeat step 6 until the door closes properly and no steam leaks are seen around the gasket seal HEATING ELEMENT TEST WARNING THE FOLLOWING STEPS REQUIRE POWER TO BE APPLIED TO THE UNIT DURING THE TEST USE EXTREME CAUTION AT ALL TIMES 1 Turn cooking mode switch to continuous 2 Measure voltage at heating element terminals and verify it against data plate voltage A If voltage is incorrect find the source of the problem B If voltage is correct check current draw amps through the heating element lead wires NOTE This method is preferred over a resistance check when a clamp on type amp meter is available 1 If current draw is correct then heating element is functioning properly
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