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Service Manual 08/01/2008 (Rev. -)

1. Figure 40 Fan Assembly Fan Motor Replacement PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE Perform the Electrical Lockout Tagout procedure found on page 18 of this manual Perform the Fan Blade Removal procedure At the rear of the oven remove the motor access panel Discharge the capacitor Remove the rubber boot Figure 38 covering the connectors on the motor starter capacitor Tag and disconnect wires from the capacitor Loosen the three motor mounting bolts and remove the upper and lower right bolts and split ring lock washers While supporting the motor Figure 41 remove the third bolt and washer Carefully remove the motor from the oven SM 28 10 11 12 13 14 15 16 17 18 19 20 21 oA Series If the new motor does not have a small fan blade mounted on the shaft perform the Motor Small Fan Blade Installation procedure Third Bolt Figure 41 Fan Motor Tag and disconnect wires from the motor Using tags created during removal connect wires to the replacement motor Insert the motor shaft and the small fan blade through the rear housing Position the motor with the wires on the lower left and secure the motor with three mounting bolts and tighten bolts evenly and securely Inside the oven position the motor shaft with the flat surface facing
2. 38 Oven Light Bulb Replacements eio eii rettet irre Deren 38 Light Fixture Replaeemerit nene a Eo 39 Top Hinge Cover Removal i iie peed 39 Bottom Hinge Cover 40 LeftOven Door Removal erste bonu Ree e 40 Door SwiteieimoWVal x eet ttr ener sep enu ey canst eves satin 41 Right Oven Door 41 TROUBLESHOOTING E 43 T e 43 IGNITION CONTROL MODULE PROBLEMS 49 Flame Sensor Current TeSt athena atic 49 ILLUSTRATED PARTS LISTING 51 ENVIROSTAR EXPLODED VIEW DRAWINGS 51 ENVIROSTARPARTS tapes eroe dese rna eade e sds 56 ENVIROSTAR WIRING 62 GALIFORNIA REGULATIONS reu oin tee i a teas 63 SM 4 Lang A Division of Star Mfg Int l Inc TM
3. teen atcha a a sui edes aa 17 C M 17 Stainless Steel Care 18 RENE 18 Preserving amp Restoration 2 das 18 MING Sige tang 18 Lockout Tagout Procedures 18 Electricallbockout TagOUt oiii cott t nosotros 18 Gas 19 19 EleCtrO mics ACCOSS DU 19 Main Power Fuse Replaceme mt suu 20 Circuit Board Replacement he 21 Lang A Division of Star Mfg Int l Inc SM 3 Service Manual Enviro Star GCSF ES Cissy LES TABLE OF CONTENTS continued Power Transformer 22 Beeper Removal 23 3 23 Pe lay OP SAMO a 24 Relay Heplacerment Led teta 24 Ignition Controller
4. 25 Right Side Panel REMOVE roin DET ecu 25 Temperature Sensor 26 Fan Motor Starter Capacitor 26 inrita 27 FaniBlade Removal Aa eet 27 eio arreter mea rne beet pe 28 Motor Small Fan Blade Installation 29 Burner Area 55 29 Replacement m 30 i e erri ne db amne eet 30 Burner 30 Heat Exchanger Replacement inten asain ine ied 31 Steamer Assembly wii ctor t Ere reper edes ERR Ee ER RE 32 Over Temperature Switch Replacement 33 Main Gas Solenoid Replacement iii Eire deo 33 Manual Gas Valve 34 Water Solenoid Replacement xar ax Pa cx Ra 35 Thermostat Replacement Backup 36 Steam Switch Replacement Backup Controls sse 37 Manual Backup Switch Replacement Backup Controls
5. 120 VAC 24 Q GND t SW2 46 21 Lee 32 BACK UP SWITCH BACK UP SWITCH CONTROL CIRCUIT BOARD OVER TEMP SWITCH 15 PIN OUTPUT CONNECTOR 30 PIN 1 PIN 4 39 PIN 2 PIN 5 36 PIN 3 PCB PING 35 40 PIN INPUT CONNECTOR H 41 MOTOR RELAY BIS ue FWD REVERSE m PIN 9 We 42 RELAY 10 36 BACK UP STEAM WITCH V WATER SOLENOID MOTOR RELAY RUN 9 9 DOOR SWITCH H m2 SPARE PIN 13 48 PIN 14 SPARE 32 3 SPEED SM 62 Lang A Division of Star Mfg Int l Inc 165 Service Manual Enviro Star GCSF ES CALIFORNIA REGULATIONS WARNING IF NOT INSTALLED OPERATED AND MAINTAINED IN ACCORDANCE WITH THE MANUFACTURER S INSTRUCTIONS THIS PRODUCT COULD EXPOSE YOU TO SUBSTANCES IN FUEL OR IN FUEL COMBUSTION WHICH CAN CAUSE DEATH OR SERIOUS ILLNESS AND WHICH ARE KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM The State of California enactedthe California Safe Drinking Water and Toxic Enforcement Act of 1986 Prop 65 which 3 prohibits any person in the course of doing business from knowingly and intentionally exposing any individual to a chemical known to the State of California to cause cancer or reproductive toxicity without first giving clear and reasonable warning to such individuals 3 The Governor s Scientific Advisor
6. Enviro Star GCSF ES The following table lists typical operating sequences in order and results Operating Sequence ACTION RESULT Power button pressed ON Panel lights and interior lights illuminate HI or LOW fan speed selected HI or LOW fan speed light illuminates TEMP KNOB used to select 125 5259 NOTE The minimum temperature for steam operation is 125 F Oven begins heating and fan begins air circulation NOTE The fan will reverse direction every two minutes during the cooking process STEAM PULSE button pressed while selecting a steam pulse time from 1 120 seconds STEAM PULSE light illuminates TIMER LED momentarily displays pulse time and steam pulse is applied Set temperature reached within 12 minutes Buzzer sounds eight times Product loaded into oven Product begins to bake TIMER used to set cooking time Cook time displays on LED and countdown begins NOTE If the steam pulse is used a one second shot of steam is applied to the baking area Optional COOK HOLD button pressed COOK HOLD light illuminates Set cooking time expires Five beep tone sounds NOTE If COOK HOLD is used the oven temperature will drop to 150 F the COOK HOLD light will turn OFF and the oven will maintain at 150 until the oven is turned OFF or a new cooking cycle is started Product removed from oven Oven is ready
7. 5 5 sse e El 5 M 5 WATERQUALITY REQUIREMENTS i etna iii redu pa ae cerno 5 DESCRIP TION me 6 ouem see een 6 t drehte Rx ac 6 Electrical Power 6 Thermostat Operation de Ex RU Cus E ad Dc Seg EUR en ined 6 Gas e 7 LEE 7 SPCCHICATONS 7 RNC 9 Door Switch Operation ER 10 Enc 11 Water Steam 11 Burnt Gas Exhaust taedet rag iru 11 DraftlnducerOperatiOn e dee 12 GOIN TROLS 13 Using Backup Controls sciri 14 Initial Power ON Test 14 reum te pastus DRE 15 Operating 15 MAINTENANCE ctii ufi
8. BODY RH SIDE W AVK ALL Q9 146 105 01 RH SIDE ACCESS COVER ALL Q9 146 126 Q9 146 126 1 BOTTOM POWER VENT E Z BOTTOM POWER VENT E S ECSF EZ Q9 146 127 TOP POWER VENT ALL Q9 146 128 DIVIDER POWER VENT ECSF EZ Q9 146 149 1 BACKUP CONTROL BRACKET ALL Q9 146 150 WATER SOLENOID BRACKET ALL Q9 146 160 PROBE HOLDER ALL Q9 146 161 PROBE CLAMP ALL Q9 146 162 SERVICE ENTRANCE BOX ALL Q9 146 163 SERVICE ENTRANCE COVER ALL Q9 146 165 1 BURNER ACCESS COVER ALL Q9 146 316 DOOR GASKET SIDES ALL Q9 146 317 DOOR GASKET TOP ALL Q9 146 318 DOOR GASKET BOTTOM ALL Q9 146 322 DOOR SWITCH BRACKET ALL Q9 146 330 HINGE COVER TOP ALL Q9 146 331 HINGE COVER BOTTOM ALL Q9 146 350 CONTROL PANEL ENVIRO Q9 146 350 1 CONTROL PANEL ENVIRO ECSF EZ Q9 146 351 COMPONENT MOUNT ENVIRO Q9 146 351 1 COMPONENT MOUNT ENVIRO ECSF EZ SM 56 Q9 146 352 1 BRACKET VENT SOLENOID ECSF EZ Lang A Division of Star Mfg Int l Inc T Part Number Service Manual for Enviro Star GCSF ES Description Where Used Q9 146 355 2 ACTUATOR ARM POWER VENT ECSF EZ Q9 146 356 COVER CONTROL PANEL DOOR ALL Q9 146 357 BACK UP DOOR HINGE ROD ALL Q9 146 358 VENT SOLENOID SHIM ECSF EZ Q9 14
9. Service Manual for Enviro Star GCSF ES INTRODUCTION GENERAL Lang Gas Convection Ovens are manufactured for use with the type of gas indicated on the data plate natural gas or propane Variations exist between models This manual details typical servicing procedures that would apply to most but not all of the listed models INSTALLATION Refer to the Installation and Operation Manual OPERATION Refer to the Installation and Operation Manual CLEANING Refer to the Installation and Operation Manual TOOLS e Standard set of hand tools Gas leak detection equipment Gas pressure manometer WATER QUALITY REQUIREMENTS Water line pressure and quality MUST meet the Lang Manufacturing Specifications listed below Contact your local water equipmentsystem provider to assist you in determining your specific water quality or contact Lang Technical Support for assistance 1 800 807 9054 IMPORTANT LOCAL WATER CONDITIONS MAY DAMAGE LANG EQUIPMENT FAILURE TO PROPERLY TREAT WATER MAY RESULT IN DAMAGE AND MAY VOID SOME OR ALL OF THE WARRANTY WATER SPECIFICATIONS After treatment the water must continuously be within the following parameters Cold Water Minimum GPH 3 20 to 80 PH 6 8 to 7 6 Hardness 2 to 4 grains gallon Total Dissolved Solids lt 100 PPM lt 1 500 000 Ohms in Conductivity Maximum Salinity lon Content Chloramines lt 0 5 PPM Chlorine lt 0 5 PPM
10. 2H 60106 73 INSULATION KIT OCE BODY ALL Q9 146 724 SAFETY STAT ASSY ALL Q9 146 749 WINDOW RING ASSY ALL Q9 60102 006 Ferrite kit OCE XFMR INPUT NOT ILLUSTRATED Lang A Division of Star Mfg Int l Inc SM 59 Service Manual Enviro Star GCSF ES uos LES Fig Part Description Where Used No Number LAMP FIXTURE N 25 31602 08 1 250V BULB FOR 31602 08 480V Units N 25 31602 09 1 130V BULB FOR 31602 09 208 240V Units N 25 31602 08 2 LAMP GLOBES 25 31602 08 LAMP FIXTURE RANGE W 250V 480V Units 25 31602 09 LAMP FIXTURE RANGE W 130V 208V 240V Units NOT ILLUSTRATED SM 60 Lang A Division of Star Mfg Int l Inc Service Manual Enviro Star GCSF ES NOTES Lang A Division of Star Mfg Int l Inc SM 61 Service Manual for Enviro Star GCSF ES Chef 212272 ENVIROSTAR WIRING DIAGRAM r DRAFT DRAFT DRAFT AIRFROVING INDUCER SWITCH 2 INDUCER INDUCER MOTOR 1 MOTOR2 MOUNTED ON TOP OF OVEN I 1 l NOTE DRAFT INDUCER USED 1 FOR SINGLE AND DOUBLE OVENS 120 VAC 1 PHASE 1 THEREFORE ON SINGLE 9 o ONLY ONE DRAFT INDUCER AND AIR A N 1 PROVING SWITCH IS USED 37 54 51 N 37 54 51 TO OTHER OVEN FLAME SENSOR IGNITER BURNER CAPACITOR P N 40704 14 LAMP1 IGNITION CONTROL
11. E Series Remove two mounting screws from the wire cover Figure 30 pivot the cover to the left and remove Locate the relay Figure 31 and remove the screw and relay clamp on the right side Tag and disconnect wires from the relay Using tags created during removal connect wires to the relay Position the relay for installation Secure the relay with the clamp and screw Slide the electronics drawer closed but do not install the mounting screws Connect the oven to external power and press the POWER button ON to ensure the oven is operational Secure the electronics drawer with four screws 32 MOTOR RELAY 1 FWD REV 41 an N N poo c mn 35 32 RELAY 3 HI LO SPEED 48 32 Figure 31 Relay Connections Lang A Division of Star Mfg Int l Inc Che Seres Ignition Controller Replacement WARNING PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual Perform the Electronics Access procedure 3 Remove two mounting screws from the wire cover Figure 30 pivotthe covertothe left and remove 4 Locatethe ignition controller Figure 32 in the electronics drawer 5 Remove m
12. 2 Perform the Bottom Hinge Cover Removal procedure 3 Performthe Door Chain amp Turnbuckles Removal procedure 4 Openoven doors to relieve spring tension Place left door in the closed position Locate the top door hinge mounting plate and loosen but do not remove three mounting bolts 7 On the larger bottom door hinge mounting plate loosen but do not remove two mounting bolts A CAUTION Use an assistant to perform steps 8 and 9 Remove Two 2 Bolts and Split Ring Lock Washers Figure 62 Left Door Bottom Mounting Plate Lang A Division of Star Mfg Int l Inc 8 While an assistant supports the door remove two bolts from the bottom plate 9 Carefully lower the door while removing the post fromthe top door hinge plate and remove from the oven 10 Toinstall reverse the above steps Door Switch WARNING PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Taggout procedure found on page 18 of this manual 2 Performthe Top Hinge Cover Removal procedure 3 Tag and disconnect wires from the switch NOTE Access to the left screw is provided through a hole in the door hinge mounting plate 4 Remove screws and nuts securing the switch to the bracket 5 Toinstall reverse the above steps Access Hole Figure 63 Door Switch Right Oven Door Removal 1
13. 6 ID 1 4 ALL 2A 20504 02 SPACER NYLON 6 1 4 X 1 ALL 2U 30200 46 MTR W FAN AXIAL 220VAC70C ECSF EZ 2U 30200 67 2U 30200 69 MOTOR OCE 208 240V MOTOR OCE 480V ECSF ES 480V 2E 30301 19 2E 30301 19 SWT MIN LEVER ACTUAT SWT MIN LEVER ACTUAT ECSF EZ 2E 30303 16 SWT TOG ON ON BLK MOM ALL 2E 30303 26 SWITCH 3PDT ALL 21 30402 27 STAT ADJ 450 DEG 48 PILOT ALL 2E 30500 08 TRM BLOCK 2 POLE SMALL 95 ECSF EZ 2E 30500 09 TRM BLOCK 3 POLE SMALL 95 2E 30700 06 2E 30700 06 3 POLE 35A 24 50 60 HZ 3 POLE 35A 24 50 60 HZ ECSF EZ 2E 30701 05 CONTC 2POLE 30A 24 VAC P amp 2E 30900 10 2E 30900 10 FUSE 15AMP 300V SC 15 FUSE 15AMP 300V SC 15 ECSF EZ 2E 30900 25 FUSE SC 20 TIME DELAY ALL 2E 30901 12 FUSE HOLDER 600V 2 POLE ALL 2E 31200 02 LUG GROUNDING ULAPPROVED ALL 2E 31400 07 XFORMR120 208 240 24V40VA ECSF EZ 2E 31400 15 XFRMR 480 24 ECSF ES 480V 2E 31400 26 XFORMR 208 240 24 12 40VA ALL 2J 40102 25 DSPLY 320X240 DB170 001 Q9 40102 70 MAIN BOARD OCE OCG ECSF EZ 2J 40102 51 CIRBD FILTER ECSF EZ 2J 40102 64 CONTROL OCE OCG NOT ON THE ECSF EZ 2E 40704 13 CAP 5 MFD 370V AC ALL 2E 41100 38 2E 41100 41 SENSOR TEMP OCE OCG SENSOR TEMP OCE OCG ECSF EZ 2B 5020
14. Chlorides lt 30 PPM Copper lt 0 05 PPM Iron 0 1 PPM Manganese 0 05 PPM Sulfates 40 PPM SPECIFICATIONS Height x Width x Depth Clearance From Weight Freight Combustible Surfaces Installed Shipping Class 36 x 40 x 40 Side 0 1 Floor 4 555 Ibs 620 lbs 70 91 4cm x 101 6cm x 101 6 252 kg 281 kg 74 x 40 4 x 40 5 0 Back 1 Floor 4 1110 Ibs 1240 Ibs 70 188 x 102 6 x 101 6cm 503 kg 562 kg UTILITY REQUIREMENTS Voltage Total kW Amps Line Total Gas Req 120V 60Hz 0 7 5 8 1 2 NPT 60 000 BTU hr 120V 60Hz 1 4 11 6 1 2 NPT 120 000 BTU hr Lang A Division of Star Mfg Int l Inc SM 5 Service Manual Enviro Star GCSF ES Chek Serves DESCRIPTION CONVECTION OVEN BASICS Aconvection ovenis an electro mechanical sealed type of oven in which the combustion products are separated from the air inside the oven Heated airis circulated by a fan into the oven and over the food product removing a thin layer of moisture from the food and allowing heat to penetrate This method requires shorter cooking times at lower temperatures andproduces consistent results which may vary due to differences in preparation rather than in oven operation Steam the cooking process prevents the removal of all the moisture during baking and produces a better product And
15. is being performed on equipment and the natural gas must remain off until service is complete by the maintenance personnel 3 Placealocking device on the natural gas inlet valve preventing actuation until the lock is removed by the maintenance personnel 4 Ontheappliance make sure all flame sources are extinguished and or removed by maintenance personnel 5 Bleedresidual gas from the appliance inlet and allow time for the gas to dissipate before beginning service on the appliance Gas Leak Test After completing service on any natural gas appliance all gas joints disturbed during service must be check for leaks DO NOT USE AN OPEN FLAME Use ahazardous gas tester or a soap and water solution 1 Applyasoap and water solution to gas joint and check for bubbles 2 fbubbles are present the joint is leaking and must be repaired before using the appliance Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES Electronics Access WARNING PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual CAUTION In the following steps the upper and lower edges of the electronics drawer slide in and out of the mounting brackets DO NOT pull the drawer completely out from the oven as it could slip out and damage wiring and or other components If further access to the drawer area is needed perform the Ex
16. 5 Ohms replace the probe Bad motor run relay MR2 With the oven ON check 24 VAC between wires 25 and 34 on the MR2 relay If voltage is present replace MR2 relay Bad circuit board With the oven OFF check for 24 VAC at pin 5 wire 39 on the circuit board If 24 VAC is available and oven is at temperature replace the circuit board SM 46 Lang A Division of Star Mfg Int l Inc a OVEN PROBLEMS Cont SYMPTOMS POSSIBLE CAUSE Service Manual for Enviro Star GCSF ES SUGGESTED REMEDY Motor only runs on low speed Incorrect wiring at high low speed relay Ensure wiring is correct as per electrical schematic correct as necessary Bad motor high low speed relay MR3 With the oven ON verify that 24 VAC is present on relay MR3 coil wires 48 and 32 If voltage is available switch speed to HIGH Voltage should drop off If voltage does not drop off check the touch pad or circuit board Bad circuit board With the oven ON check pin 13 wire 48 for 24 VAC Voltage 24 VAC should be present when LOW speed is selected If voltage is available check the relay High Low speed relay is wired wrong Ensure wiring is correct per electrical schematic correct as necessary Bad motor high low speed relay MR3 With the oven ON check for 24 VAC at relay MR3 coil wires 48 and 32 If voltage is not available switch speed to LOW 24 VAC should be available If voltage
17. LOCKOUT TAGOUT PROCEDURES This section of the manual describes removal and replacement of the various parts available from an authorized service provider For part numbers refer to the exploded view parts list in the Operations Manual provided with the unit Electrical Lockout Tagout The Lockout Tagout procedure is used to protect personnel working on an electrical appliance Perform the following steps when performing any type of maintenance or service on an electrically operated appliance 1 In electrical box place unit s circuit breaker into OFF position 2 Place a lock or other device on electrical box cover to prevent someone from placing circuit breaker ON 3 Placeatag on electrical box cover to indicate thatunithas been disconnected for service and power should not be restored until tag is removed by maintenance personnel 4 Disconnect unit power cord from electrical outlet 5 Place a tag on cord to indicate that oven has been disconnected for service and power should not be restored until tag is removed by maintenance personnel Lang A Division of Star Mfg Int l Inc 2 Gas Lockout Tagout The Gas Lockout Tagout procedure is used to protect personnel working on a gas appliance Before performing any type of maintenance or service on a gas appliance follow these steps 1 Locatethe natural gas or inlet valve and place the valve in the OFF position 2 Placeatagonthe valve indicating that service
18. MONOXIDE MUST BE WARNED OF SUCH POSSIBLE EXPOSURE THIS WARNING SHOULD BE CONVEYED IN AMANNER SO THAT IT IS CLEARLY UNDERSTOOD BY THE EMPLOYEE AND THE EMPLOYEE SHOULD BE ASKED IF IN FACT HEOR SHE UNDERSTANDS THE CORRECT METHOD OF OPERATION OF THE EQUIPMENT AND THAT ARISK OF EXPOSURE EXISTS IF THE EQUIPMENT IS OPERATED IMPROPERLY Lang A Division of Star Mfg Int l Inc SM 63 Service Manual Enviro Star GCSF ES DU Sor LES A STAR MANUFACTURING 10 Sunnen Drive St Louis MO 63143 U S A 800 807 9054 314 781 2777 Parts amp Service 800 807 9054 www star mfg com SM 64 Lang A Division of Star Mfg Int l Inc
19. Manual Backup Switch Backup Controls 5 Remove the mounting ring at the front of the switch and pull the switch down through the mounting plate 6 Using tags created during removal connect wires to the new switch 7 Insert the shaft of the new switch through the mounting plate and install the mounting nut 8 Toinstallall previously removed parts reverse the above steps 9 Connectthe ovento external power source and press the POWER button ON to ensure the 15 operational SM 38 Chek Series Oven Light Bulb Replacement A CAUTION Ensure the power is OFF and the oven is cool before performing this procedure 1 Locate the light Figure 58 in the oven that is notilluminating Oven Lights Figure 58 Oven Lights 2 Carefully turn the glass lens counter clockwise and remove the lens and metal gasket from the Socket assembly NOTE Do not lose or discard the metal gasket During replacement install the gasket with the lens 3 Rotatethe bulb counter clockwise and remove it from the light socket 4 nsertthe replacement bulb into the socket and turn clockwise into the socket until tight 5 Replace the glass lens and turn clockwise to tighten 6 Toinstallall previously removed parts reverse the above steps 7 Press the POWER button ON to ensure the oven light is operational Lang A Division of Star Mfg Int l Inc Bm Light Fixt
20. Performthe Top Hinge Cover Removal procedure 2 Perform the Bottom Hinge Cover Removal procedure 3 Perform the Door Chain amp Turnbuckles Removal procedure 4 Open the oven doors to relieve spring tension Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES 5 Locatethe brass bushing and circular clamp at the top of the right door hinge post Figure 64 6 Matchmark the brass bushing and circular clamp Figure 64 Figure 64 Right Door Hinge Bushing amp Clamp 7 Loosenthecircular clamp bolt and remove the clamp 8 Close the right door Locate the top door hinge mounting plate and loosen butdo not remove three mounting bolts 10 Locate the bottom door hinge mounting plate Figure 65 and loosen but do not remove four mounting bolts CAUTION Use an assistant when performing steps 11 and 12 11 While an assistant supports the door remove four bolts from the bottom mounting plate Remove Four 4 Bolts and Split Ring Lock Washers Figure 65 Right Door Bottom Mounting Plate SM 41 Service Manual Enviro Star GCSF ES WA Sor LES 12 Carefully lowerthe door while removing the post from the top door hinge 13 Reverse above steps to reassemble 14 During assembly ensure the circular clamp is positioned to properly activate the door switch Figure 66 Door Switch DOOR CLOSED Figure
21. drops off check wiring of relay Bad circuit board With oven ON check pin 13 wire 48 for voltage Voltage should not be present when HIGH speed is selected If no voltage is present check the relay Motor runs with door open Bad door switch Lang A Division of Star Mfg Int l Inc With power OFF and the doors closed use an Ohmmeter to check continuity across the door switch Continuity should be available With the doors open there should be no continuity If necessary replace the door switch SM 47 Service Manual Enviro Star GCSF ES PAA LES OVEN PROBLEMS Cont SYMPTOMS POSSIBLE CAUSE SUGGESTED REMEDY Oven does not create External water valve OFF Turn the external water valve ON steam Bad dirty external water filter Check the external water filter Replace the filter as needed Bad water solenoid SV1 With oven ON and in steam mode check for 24 VAC between water solenoid wires 43 and 32 If voltage is available replace the water solenoid Bad circuit board With oven ON and in steam mode check for 24 VAC between water solenoid wires 43 and 32 If voltage is not available replace the circuit board Oven creates steam at Water pressure to high Regulate incoming water pressure to all times 20 to 80 psi Bad water solenoid SV1 With oven ON and not in steam mode check for 24 VAC between water solenoid wires 43 and 32 If voltage is not available replace the solenoid Bad circ
22. for cooking SM 16 Lang A Division of Star Mfg Int l Inc a Service Manual Enviro Star GCSF ES MAINTENANCE CAUTION Always keep clear of combustible materials CAUTION Keep the floor in front of equipment clean and ary If spills occur clean immediately to avoid the danger of slips or falls Water filters and conditioners should be inspected and replaced per manufacturer s recommendations OVEN CLEANING Exterior See STAINLESS STEEL CARE AND CLEANING Interior WARNING KEEP WATER AND SOLUTIONS OUT OF THE CONTROLS AREA NEVER SPRAY OR HOSE THE CONTROL PANEL CAUTION Most cleaners are harmful to the skin eyes mucous membranes and clothing Precautions should be taken to wear rubber gloves goggles or a face shield and protective clothing CAUTION Carefully read all warnings and follow the directions on the label of the cleanerto be used CAUTION Never leave a chlorine sanitizer in contact with stainless steel surfaces longer than ten minutes Prolonged contact can cause corrosion Lang A Division of Star Mfg Int l Inc CAUTION Do not use caustic cleaners Always start with a cold oven Always follow the oven cleaner instructions Do not use caustic cleaners Using any harsh chemicals will result in removal of the ETC coating and etching of the porcelain The oveninterior should be cleaned using mild soap and a non metal scouring p
23. gas valve 14 Turn the electric supply ON and press the POWER button ON to ensure the oven is operational 15 Increase the oven temperature until the gas valve opens and the burner ignites 16 Perform the Gas Leak at all visible gas connections 17 Press the front panel POWER button OFF 18 Toinstall all previously removed parts reverse the above steps SM 34 Manual Gas Valve Replacement 4 WARNING PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE WARNING PERFORM THE GAS LOCKOUT TAGOUT PROCEDURE ALL GAS JOINTS DISTURBED DURING SERVICING MUST BE CHECKED FOR LEAKS DO NOT USE AN OPEN FLAME USE A SOAP AND WATER SOLUTION AND CHECK FOR BUBBLES WHICH INDICATE A GAS LEAK 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Gas Lockout Tagout procedure found on page 19 of this manual Turn OFF the electric supply to the oven Perform the Right Side Panel Removal procedure 5 Remove the handle from the gas valve Figure 52 6 Loosen two gas line fittings on the manual gas valve 7 Cuttie straps Figure 52 securing the manual gas valve to the backup control bracket 8 Disconnecttwo gas lines and removethe valve fromthe oven 9 Remove the handle from the new manual gas valve 10 Position the new gas valvethrough the backup control bracket and attach the handle 11 Install two gas lines into the valve and
24. when applied to bread dough during the first five minutes it allows yeast to work longer producing better spring and volume and a moist flexible outer surface Once the outside layer of dough sets gases in the loaf no longer expand to increase loaf size Steaming bread dough as it bakes gelatinizes starch on the outer layer and prevents the crust from cracking However too much steam results in an undesirable crust During the last stages of baking a dry oven is needed to produce a crisp brown crust Times and temperatures may vary due to factors such as food quality and quantity type of pan and thermostat calibration Differences in altitude will also affect cooking times and temperatures Time amp Temperature Conversion To convert standard oven recipes for use in a convection oven reduce cooking temperature by 25 F 75 F and the time by 25 35 Fan Speeds The convection fan can be set for HI or LOW speed Most baking is done on HI but delicate products i e Meringue pie require a LOW fan setting SM 6 COMPONENT OPERATION Electrical Power Circuit The operating voltage 120 VAC is routed from the power source to a terminal block NOTICE See the wiring diagrams in the Troubleshooting section The AC line is connected through a 15 Amp fuse F7 to a contact on the motor relay MR2 interior light relay LR1 and the primary winding of a step downtransformer T1 Thetransformer provides
25. 0 103 RACK SLIDE OCE OCG ALL 2B 50200 20 RACK ECCO GCCO OVEN ALL Q9 50312 02 1 SM 58 DOOR CHAIN AND TURNBCKL ALL Lang A Division of Star Mfg Int l Inc Number Service Manual for Enviro Star GCSF ES Description Where Used 2P 51001 19 SPRING SWT HINGE EHS ALL 2P 51001 38 SPRING VENT ECSF EZ 60301 162 LABEL PANEL OCE G ENVIRO ALL 2M 60301 166 LABEL PANEL OCE amp G ENVIRO ECSF EZ 2M 60301 169 LABEL OCE ACCESS DR W BUP ALL 2K 70101 03 BRASTBEELBOW 1 4NPT 3 8CC ALL 2K 70101 54 BRAS TBE UNION 3 8CCX1 4 ALL 2K 70302 36 1 PIPE NIPPLE S ANPT X 8BLK ALL 2K 70302 53 PIPE COUPLING 3 8X1 3 16 ALL 2K 70303 03 PIPE COUPLING 1 4 NPT ALL 2K 70305 05 PIPE 90 ELBOW 3 4 BLK ALL 2V 70403 05 SOLENOID WATER 2V 70403 07 SOLENOID PULL 24VAC ECSF EZ Y9 70701 17 1 KNOB 450 B PHANTOM ALL 2R 70701 45 1 BKKNOB RED TOP 6MM W D NOT ON THE ECSF EZ 2 70801 08 2K 70801 08 SNAP BUSH 1 3 4 SB1750 22 SNAP BUSH 1 3 4 SB1750 22 ECSF EZ 2U 71500 16 FAN NCO 16 IN ALL 2U 71500 17 FAN NCO 6 IN ALL Q9 EH 502 1 TRIMLOCK 4 NOT ON THE ECSF EZ 21 30401 30 STAT FXD 550 DEG OPEN ALL Q9 30401 30 2 SWT KIT STAT FXD 550 DEG ALL 1P 72602 37 GSKT OCE ELEMENT ALL
26. 24 VAC through the circuit board to control the oven electrical components Thermostat Operation The thermostat maintains oven temperature at the desired setting A sensor Figure 1 mounted inside the oven monitors oven temperature The unit is equipped with both e amechanical thermostat aprogrammable temperature controller Oven Sensor 4 d P wi Aww aw ZS Figure 1 Oven Sensor When the operator selects a temperature setting or the product to bake the oven is heated until the temperature reaches the selected setting The controls circuit monitors the temperature sensor and activates the ignition control module to ignite the burner when heatis required Lang A Division of Star Mfg Int l Inc 4 Manual Gas Valve Intermediate Gas Line Main Gas Valve Solenoid Burner Gas Line Service Manual for Enviro Star GCSF ES Figure 2 Gas Flow Diagram Gas Flow and Ignition Natural gas is supplied through the manual gas valve Figure 2 to the main gas solenoid Whenthe temperature is selectedthe ignition control module activates the igniter and opens the gas solenoid Gas flows to the burner and the igniter lights the flame The ignition control module monitors the flame sensor to determine if the burner is on If the burner does not ignite the solenoid valve closes shutting off gas flow to the oven Ignition System The igniter module co
27. 5141 X333 VV Y 5 53 Lang A Division of Star Mfg Int l Inc Service Manual Enviro Star GCSF ES Cheb Ser LES sion of Star Mfg Int l Inc 4 N e SEE en A PT MI d amp We 74 PA Ih 8 Ve MODEL ECSF OCE Right Side Detail SM 54 Lang A Division of Star Mfg Int l Inc 24 tes Service Manual for Enviro Star GCSF ES A Division of Star Mfg Int l Inc hj 277 M Ww QN MODEL ECSF OCE Skins Exploded View This drawing contains information confidential to Lang Manufacturing CERTAIN INSTANCES MAY NOT BE AVAILABLE No reproduction or disclosure of its ILLUSTRATIVE PURPOSES ONLY AND IN contents is permitted SOME ITEMS ARE INCLUDED FOR Lang A Division of Star Mfg Int l Inc SM 55 Service Manual Enviro Star GCSF ES 21 ENVIROSTAR PARTS REFERENCE Part Number Description Where Used 2N 11090 37 ELE U SHPE OCE 2600W 2240V ALL Q9 146 102 1 RIGHT REAR CORNER ALL Q9 146 102 2 BODY BACK ALL Q9 146 103 BODY TOP OCE ALL Q9 146 104 BODY LEFT SIDE ALL Q9 146 105 2
28. 6 359 RELAY CLAMP ALL Q9 146 360 RELAY CLAMP BASE ALL Q9 146 361 PC BOARD HEAT SHIELD ALL Q9 146 362 PC BOARD PROTECTOR ALL Q9 146 363 COMPONENT WIRE COVER ALL Q9 146 363 1 TRIMLOCK 8 750 ALL Q9 146 364 COMPONENT WIRE COVER CLIP ALL Q9 146 407 ELEMENT TOP ACCESS COVER ALL Q9 146 408 VENT PASSTHROUGH UPPER ALL Q9 146 409 REAR PANEL STANDOFF ANGLE ALL Q9 146 413 ACCESS PANEL MOTOR ALL Q9 146 490 CTRL PANEL COOLING FAN ECSF EZ Q9 146 491 CTRL PANEL COOLING FAN ECSF EZ Q9 146 493 CTRL PANL FAN BTM ECSF EZ Q9 146 720 INTAKE COVER ASSY ALL Q9 146 736 MOTOR BRACKET WELD ALL Q9 146 737 WATER INLET WELDMENT ALL Q9 146 738 WATER INLETASSY ALL 2K 70101 04 BRAS TBE ELBW 3 8NPTM 3 8 ALL Q9 146 740 STEAMER ASSY ALL Q9 146 745 DOOR ASSY LH ALL Q9 146 750 DOOR ASSY RH ALL 2J 30802 08 BEEPER 3 24 VDC PIEZO PNL NOT ON THE ECSF EZ Q9 146 765 STACKING VENT ASSY ALL Q9 146 768 LIGHT RETAINER ASSY ALL 2C 20112 03 SCRW 1 4 20X1 2 SS ALL 2C 20119 01 Lang A Division of Star Mfg Int l Inc EYEBLTFORGD SHLDR1 4 20X1 ALL SM 57 Service Manual Enviro Star GCSF ES Part Number Description 2 2 Where Used 2 20501 05 SPCR FBR 1 4 OD
29. 66 Circular Clamp Position SM 42 Lang A Division of Star Mfg Int l Inc Clase 165 Service Manual Enviro Star GCSF ES TROUBLESHOOTING caution Only qualified service technicians should perform tests listed in this troubleshooting table Maintenance and service on this appliance should be performed only by qualified service technicians trained in appliance and test equipment operation and diagnostic and safety procedures This troubleshooting table does not cover every possible problem or condition that may occur during operation Qualified service technicians can perform tests and determine the necessary action for problems not listed in the table OVEN PROBLEMS SYMPTOMS POSSIBLE CAUSE SUGGESTED REMEDY Oven does not turn ON Oven unplugged Plug in oven Bad cord plug Replace cord plug Tripped switch in circuit breaker box Reset switch Blown fuse With AC power disconnected use an Ohmmeter to check for an open fuse Replace fuse if necessary Bad primary transformer Check transformer input leads for 120 VAC If the voltage is correct disconnect AC power and check the resistance across the transformer primary e f open replace transformer If the voltage is not correct check for open circuit between AC inputs and the transformer Bad secondary transformer With the MANUAL BACKUP switch in MANUAL position check for 24 VAC from pin 1 to pin 3 on the 15 pin cable Check f
30. Enviro Star GCSF ES Relays Four 24 VAC relays are used to operate the relay coil which acts like switch The relays control the circuits as follows Figure 28 Relay Mounting Relay 1 MR1 Fan Motor Forward Reverse e Relay 2 MR2 Fan Motor Run Relay 3 Fan Motor HI LOW Speed e Relay 4 LR1 Light Switch 120 Volts AC High Voltage Input 24 Volts AC Gro nd Relay control Figure 29 Basic Relay Operation SM 23 Service Manual for Enviro Star GCSF ES Relay Operation Relays use low voltage Figure 29 to activate a switch that routes a higher voltage to a component four oven relays operate in the same manner One side ofthe coil Figure 29 is grounded When activated by the control system circuit board 24 is routed to the other side of the coil With ground and 24 VAC applied to the coil a magnetic field is generated The magnetic field pulls the switch down The 120 VAC is then routed through the switch to one side ofthe light bulb Because the other side of the light bulb is grounded the bulb illuminates Relay Replacement ky A WARNING Cue gt X PERFORM THE ELECTRICAL LOCKOUT TAGOUT ISS PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Electronics Access procedure Transformer Component Wire Cover Figure 30 Wire Cover SM 24 10 11
31. F ELECTRICAL SHOCK DO NOT REMOVE THE CONTROL PANEL THERE ARE NO USER SERVICABLE PARTS INSIDE REPAIRS SHOULD BE MADE BY AUTHORIZED SERVICE PERSONNEL ONLY NOTICE Using any part other than genuine Lang factory supplied parts relieves the manufacturer of all liability Lang reserves the right to change specifications and product design without notice Such revisions do not entitle the buyer to corresponding changes improvements additions or replacements for previously purchased equipment Due to periodic changes in designs methods procedures policies and regulations the specifications contained in this document are subject to change without notice While Lang Manufacturing exercises good faith efforts to provide information that is accurate we are not responsible for errors or omissions in information provided or conclusions reached as a result of using the specifications By using the information provided the user assumes all risks in connection with such use SM 2 Lang A Division of Star Mfg Int l Inc 165 Service Manual Enviro Star GCSF ES TABLE OF CONTENTS AER 2 INTRODUCTION m 5 GENERAL wO asec 5 INSTALLATION tees 5 OPERATION 5 e NU cC
32. LECTRICAL LOCKOUT TAGOUT PROCEDURE WARNING PERFORM THE GAS LOCKOUT TAGOUT PROCEDURE WARNING ALL GAS JOINTS DISTURBED DURING SERVICING MUST BE CHECKED FOR LEAKS DO NOT USE AN OPEN FLAME USE A SOAP AND WATER SOLUTION AND CHECK FOR BUBBLES WHICH INDICATE A GAS LEAK 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Gas Lockout Tagout procedure found on page 19 of this manual Perform the Internal Access procedure Performthe Fan Blade Removal procedure Remove 14 screws securing the burner access cover Burner Access Cover Figure 43 Burner Access Cover SM 29 Service Manual Enviro Star GCSF ES Igniter Replacement 1 Perform the Burner Area Access procedure 2 Remove the igniter Figure 44 by removing the screw securing it to the burner 3 Remove tie straps securing the wires in the wiring harness 4 Tag disconnect igniter wiring Using tags created during removal connect wires to the new igniter 6 Position the igniter in the burner and secure with a screw 7 Toinstall all previously removed parts reverse the above steps 8 Turnthe external gas supply ON and press the POWER button ON to ensure the oven is operational Q 9 I Igniter Figure 44 Igniter and Flame Sensor SM 30 A Flame
33. Lang A Division of Star Mfg Int l Inc GAS FULL SIZE COMPUTERIZED CONVECTION OVEN Enviro STAR GCSF ES Service Manual 2M W1345 Rev 08 01 08 Lise Service Manual Enviro Star GCSF ES Chl 165 These symbols are intended to alert the user to presence of important operating and maintenance instructions in this manual IMPORTANT FOR YOUR SAFETY THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL GAS EQUIPMENT WHO SHOULD PERFORM THE INITIAL FIELD START UP AND ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE EVENT THE SMELL OF GAS IS DETECTED THIS INFORMATION CAN BE OBTAINED FROM THE LOCAL GAS SUPPLIER A WARNING IN THE EVENT OF A POWER FAILURE DO NOT ATTEMPT TO OPERATE THIS DEVICE A WARNING IN THE EVENT A GAS ODOR IS DETECTED SHUT DOWN UNIT AT THE MAIN SHUTOFF VALVE AND CONTACT THE LOCAL GAS COMPANY OR GAS SUPPLIER FOR SERVICE FOR YOUR SAFETY DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE A WARNING IMPROPER INSTALLATION ADJUSTMENT ALTERATION SERVICE OR MAINTENANCE CAN CAUSE PROPERTY DAMAGE INJURY OR DEATH READ THE INSTALLATION OPERATING AND MAINTENANCE INSTRUCTIONS THOROUGHLY BEFORE OPERATING THIS EQUIPMENT A WARNING TO REDUCE THE RISK O
34. NG PERFORM THE GAS LOCKOUT TAGOUT PROCEDURE ALL GAS JOINTS DISTURBED DURING SERVICING MUST BE CHECKED FOR LEAKS DO NOT USE AN OPEN FLAME USE A SOAP AND WATER SOLUTION AND CHECK FOR BUBBLES WHICH INDICATE A GAS LEAK 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Gas Lockout Tagout procedure found on page 19 of this manual 3 Performthe External Right Side Panel Removal procedure 4 Tag and disconnect wires from the main gas valve Figure 51 Figure 51 Main Gas Solenoid SM 33 Service Manual for Enviro Star GCSF ES 5 Loosen two gas line fittings 6 Remove two screws securing the gas valve bracket to the oven housing 7 While supporting the gas valve disconnectthe two gas lines and remove the valve from the oven 8 Remove the gas valve bracketfrom the old valve and secure it to the new one 9 Insert two gas lines into the new gas valve 10 Position the gas valve bracket on the oven housing and secure with two screws 11 Tighten two gas line fittings 12 Using tags created during removal connect wires to the gas valve solenoids A WARNING ALL GAS JOINTS DISTURBED DURING SERVICING MUST BE CHECKED FOR LEAKS DO NOT USE AN OPEN FLAME USE A SOAP AND WATER SOLUTION AND CHECK FOR BUBBLES WHICH INDICATE A GAS LEAK 13 Turn the external gas line valve ON and perform the Gas Leak Test at the input side of the new
35. OF FUSE 600 60302 77 WARNING FOR CONTINU WITH SAME 15 Figure 21 Fuse Replacement Lang A Division of Star Mfg Int l Inc Oe Series Circuit Board Replacement PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual Perform the Electronics Access procedure 3 Remove the heat shield on the right side front Figure 22 of the electronics drawer by removing mounting screws at the top and bottom Heat Shield Figure 22 Heat Shield 4 Taganddisconnectfive cables Figures 23 and 24 from the circuit board DO NOT pull on the wires 5 Carefully pull off the knobs from the temperature selector and timer 6 Remove the mounting nut and washer from temperature selector and timer shafts 7 Remove the nuts and nylon washers from in the four corners of the circuit board 8 Carefully remove the circuit board from the threaded studs Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES NOTE A spacer and two washers remain on each 10 11 12 13 14 15 16 17 18 mounting stud Do not lose the washers and spacers Toinstall a replacement circuit board carefully insert the temperature selector and timer shafts through the front panel and position the circuit board on the four corner studs Secure th
36. Sensor Replacement 4 SW warnine Ni 3 PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual Perform the Internal Access procedure Perform the Burner Area Access procedure Removethe flame sensor Figure 44 by removing the screw securing it to the burner 5 disconnect the wire from the igniter Position the new igniter for installation and secure with a screw 7 Using tag created during removal connect the wire to the igniter 8 Toinstall all previously removed parts reverse the above steps 9 Turnthe external gas supply ON and press the POWER button ON to ensure the oven is operational Burner Replacement 1 Perform the Burner Area Access procedure 2 Perform the Flame Sensor Replacement procedure Performthe Igniter Replacement procedure Remove mounting screws from the igniter and flame sensor bracket and remove the bracket WARNING DONOTPLACEFINGERS UNDER THE BURNER WHEN SCREWS ARE REMOVED THE BURNER WILL DROP FROM THE MOUNTING BRACKETS SERIOUS PERSONAL INJURY MAY OCCUR TO FINGERS 5 Toavoidinjuryto fingers during removal place a screwdriver under the left side of the burner Figure 45 6 Remove two screws securing the burner to the heat exchanger assembly 7 Carefully slide the burner Figure 46 out from under the heat exchanger Lang A Division of Star Mfg Int
37. Water Inlet ees CARBON MONOXIDE IS A DEADLY GAS THAT Line KILLS ENSURE THAT APPLIANCE EXHAUST Water Stall gt VENTS FLUES AND CHIMNEYS ARE INSTALLED AND SERVICED BY PROFESSIONAL INSTALLATION PERSONNEL AND ARE Figure 9 Water Flow Diagram ADEQUATE FOR THE APPLIANCE BEING INSTALLED Lang A Division of Star Mfg Int l Inc SM 11 Service Manual Enviro Star GCSF ES A negative pressure in the appliance allows the exhaust gases to flow up the flue The flue helps generate air flow around the burner allowing the burner to burn the gas more efficiently A draft inducer Figure 11 provides air to the burner and helps exhaust the burnt gasses Draft Inducer Operation The Draft Inducer is a device mounted on the top of the oven over the exhaust vent It provides secondary air to the burners by creating a draft The operation of the Draft Inducer is controlled by the Ignition Control Draft Inducer Figure 11 Draft Inducer NOTE See the wiring diagram for wire routing for the draft inducer The draft inducer uses a proving switch to ensure proper air flow when the burneris in operation The switch is mounted between the controller W terminal and the PS terminal An internal controller switch Figure 12 between the PS and MV1 terminals routes voltage to the main gas valve If the internal switch is open the main gas valve solenoid will not open to allow gas flow to the burner NOTE n a descrip
38. ad Care should be taken to prevent caustic cleaning compounds from coming in contact with the fan wheel Oven interior should be wiped down daily and thoroughly cleaned weekly using warm water and mild detergent Do notuse caustic cleaners This appliance should be checked at six month intervals by a qualified technician heating unit mechanical stability corrosion etc especially control and safety devices The oven racks and rack slides may be removed and cleaned outside the oven using oven cleaner The stainless exterior can easily be cleaned using stainless steel cleaner Always apply stainless steel cleaners when the oven is cold and rub in the direction of the metal s grain SM 17 Service Manual Enviro Star GCSF ES STAINLESS STEEL CARE Cleaning Stainless steel contains 70 80 iron which will rust if not properly maintained It also contains 12 30 chromium which forms an invisible passive protective film that shields against corrosion If the film remains intact the stainless steel will remain intact However ifthe film is damaged the stainless steel can break down and rust To preventstainless steel breakdown follow these steps CAUTION Never use any metal tools Scrapers files wire brushes or scouring pads except for stainless steel scouring pads will mar the surface CAUTION Never use steel wool which will leave behind particles that rust CAUTION Never use acid b
39. and an over temperature switch to the ignition controller pin W The ignition control module Figure 4 operates on 24 VAC at pin W provided by the transformer The module controls the main gas solenoid and the igniter SM 8 Dp Series 338 Ignition Controller Figure 4 Ignition Control Module When the power switch is placed in the ON position and atemperature is selected using the temperature knob a call for heat is generated in the controller Thecontroller performs a self check routine e The diagnostic LED flashes for one second A safety timing sequence begins Thecontroller performs a 15 second pre purge of the system Thecontroller must detectthat the air switch is working properly before it energizes the igniter and the surface of the igniter tip heats up The main gas valve solenoids open allowing gas to flow to the burner Thegasinthe burner is ignited by the igniter tip A TFI trail forignition period checks the flame sensor for evidence of a flame at the burner If flame does not ignite within 7 seconds the control module closes the maingas valve solenoids and gas stops flowing to the burner When a flame is detected voltage to the igniter stopsandthe igniter cools The thermostat pressure switch and burner flame are monitored for proper operation When the selected temperature is reached voltage stops flowing to the main gas valve solenoids Figu
40. ar Mfg Int l Inc T Service Manual for Enviro Star GCSF ES Oven Lights Water Steam Applications Light relay LR1 routes voltage to one side ofthe When steam is required for the baking process the four oven lights Figure 8 The other side ofthe controller activates the water solenoid SV1 lights is connected to a neutral When the Figure 9 Water is passed through the water stall controller applies 24 VAC to the light relay 120 Figure 10 and heated to produce steam The steam VAC is routed tothe oven lights illuminating the fills the cooking area The water system has a 3 8 oven cooking area inlet line and a 3 8 supply line to the water stall The water stall drain is 3 4 allowing excess water to drain quickly from the water stall Steamer Assembly Oven Lights Z222000000200000000 2 Figure 10 Steamer Assembly Water Stall Burnt Gas Exhaust When natural gas is burned in the appliance the burnt gases mustbe vented away from the appliance The gases are exhausted out a vent and through a flue chimney or exhaust vent There are numerous exhaust vent systems availableto carry the exhaust gases away from the appliance and work area WARNING i cc BURNING NATURAL GAS PRODUCES EXHAUST Solenoid GASES THAT CONTAIN CARBON MONOXIDE
41. ased or chloride containing cleaning solutions which will break down the protective film CAUTION Never rub in a circular motion CAUTION Never leave any food products or salt on the surface Many foods are acidic Salt contains chloride For routine cleaning use warm water mild soap or detergent and a sponge or soft cloth For heavy duty cleaning use warm water a degreaser and a plastic stainless steel or Scotch Brite pad Always rinse thoroughly Always rub gently in the direction of the steel grain Preserving amp Restoring Special stainless steel polishing cleaners can preserve and restore the protective film SM 18 p Series Preserve the life of stainless steel with a regular application of a high quality stainless steel polishing cleaner as a final step to daily cleaning If signs of breakdown appear restorethe stainless steel surface First thoroughly clean rinse and dry the surface Then on a daily basis apply a high quality stainless steel polish according to manufacturer s instructions Heat Tint Darkened areas called heat tint may appear on stainless steel exposed to excessive heat which causes the protective film to thicken It is unsightly but is not a sign of permanent damage To remove heat tint follow the routine cleaning procedure Stubborn heat tint will require heavy duty cleaning To reduce heat tint limit the exposure of equipment to excessive heat
42. e circuit board with nylon washers and nuts but do not tighten nuts Secure the temperature selector and timer with a washer and nut and tighten nut securely Install knobs on the temperature selector and timer Tighten the circuit board nuts securely Using tags created during removal connect cables to the circuit board Slide the electronics drawer closed but do not install mounting screws Connect the oven to external power and press the panel POWER button ON to ensure the oven is operational Secure the electronics drawer with four screws and tighten screws securely Place the heat shield in position secure with two screws and tighten screws securely Door Open Sensor Temperature Sensor Output Connector Figure 23 Circuit Board Connectors SM 21 Service Manual Enviro Star GCSF ES Do LES 11 Connectthe ovento external power and press the POWER button ON to ensure the oven is operational 12 Secure electronics drawer with four screws and tighten screws securely Door Open Sensor Temperature Sensor Connector Figure 24 Circuit Board Cables Component Transformer Wire Cover Power Transformer Replacement 7 SA A WARNING S PERFORM THE ELECTRICAL SIS LOCKOUT TAGOUT S PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Electronics Access procedure 3 Rem
43. en controls These controls Figure 14 are mounted behind a door below the oven control panel Figure 13 Controls include the BACKUP MANUAL switch a TEMPERATURE knob and a STEAM switch TheBACKUP MANUAL switch overrides the electronic controls and activates the backup controls The TEMPERATURE knob controls the temperature The STEAM toggle switch controls the steam In this mode the fan will operate at HI speed only The Backup mode does not use the energy saving option and does not allow the fan to operate at Low speedorreverse direction To use the backup controls place the BACKUP MANUAL switch in the BACKUP position Steam Switch Backup Electronic Va Controls Switch Figure 14 Backup Controls SM 14 2 m Follow these steps to verify the operation and temperature control ofthe oven Initial Power ON Test e Press the POWER button ON and verify that the interior and panel lights turn on e Setthe temperature to 300 and verify thatthe TEMP INDICATOR light is blinking e Verify that the oven reaches the set point and signals Ready with an audible tone within 12 minutes starting with a cold oven e timer to 10 minutes and verify that the fan stops and reverses direction after approximately 108 seconds A full reversing cycle takes 120 seconds Door Switch Figure 15 Door Switch Location Open the oven door Figure 15 and verify that t
44. ervice Manual Enviro Star GCSF ES 2 8 LES NOTES SM 50 Lang A Division of Star Mfg Int l Inc 165 Service Manual Enviro Star GCSF ES ILLUSTRATED PARTS REFERENCE on of Star Mfg Int l Inc MODEL ECSF ES OCE Enviro STAR Control Panel Board Lang A Division of Star Mfg Int l Inc SM 51 Service Manual Enviro Star GCSF ES hen LES A Division of Star Mfg Int l Inc 4 E 7 2 222252528 VA 2 MODEL ECSF EZ Enviro ZONE Control This drawing contains information confidential CERTAIN INSTANCES MAY NOT BE AVAILABLE SOME ITEMS ARE INCLUDED FOR ILLUSTRATIVE PURPOSES ONLY AND IN repre contents is permitted SM 52 Lang A Division of Star Mfg Int l Inc Service Manual Enviro Star GCSF ES T 90 87 83 _ 21218 2045 390 4503 73 AOW 38V LON AVW S39NVISNI NIVIN3D NI ANY AINO S3SOduNd SWALI 3NOS si sjusjuo2 Sj Jo 5 10 ON Buunjoejnuey uoneuuojur surejuoo
45. eturn the controller will enter a lockout condition and the draft inducer fan will shut OFF During normal sequence if a flame signal occurs due to the main gas valve solenoid not closing all the way the controller will energize the draft inducer fan If the gas valve solenoid closes the controller will shut off the draft inducer fan Lang A Division of Star Mfg Int l Inc 4 Service Manual Enviro Star GCSF ES CONTROLS The electronic control panel Figure 13 is used to control oven operation The unit also has manual backup controls ENVIRO Star Power 1 Shot Steam Pulse Steam Fan C COOK N HOLD HI LOW apo apo _ T o a o LED Temp Indicator VERS 4180 Ogg Temp Knob LED Timer Screen H Timer Knob BACKUP __ __ CONTROL ACCESS DOOR Figure 13 Electronic Control Panel Lang A Division of Star Mfg Int l Inc Electronic Control Panel Figure 13 POWER e ON OFF button When pressed ON interior lights and panel indicators turn on When pressed OFF interior lights and panel indicators turn off and the fan remains ON until the oven cools down to 250 F FAN e ON OFF Switch Has two operating speeds L LOW H HI e Mustbeturned on during operation e During operation the fan will reverse directions periodically to maintain co
46. ew light fixture with the alignment tab at the top 12 Press the light fixture into the mounting hole until the tabs lock into position behind the oven housing 13 Inside the electronics area using tags created during removal connect the two power connectors to the new light fixture 14 Toinstall all previously removed parts reverse the above steps 15 Connect the oven to external power and press the POWER button ON to ensure the oven lights work Top Hinge Cover Removal 1 With the oven doors fully closed remove the outer two mounting screws for the top hinge cover Figure 60 2 Opentheoven doors the way and remove the inner two mounting screws for the top hinge cover 3 Slide the top hinge cover forward and away from the oven 4 Toinstall reverse the above steps Remove All Interior and Exterior Top and Bottom Mounting Screws Figure 60 Hinge Cover Mounting Screws SM 39 Service Manual for Enviro Star GCSF ES Bottom Hinge Cover Removal 1 With the oven doors fully closed remove the outertwo mounting screws forthe bottom hinge cover Figure 60 2 Openthe oven doors all the way and remove the innertwo mounting screws forthe bottom hinge cover 3 Remove six mounting screws and the bottom door gasket A CAUTION This hinge cover fits snugly Use care to not damage parts or injure knuckles 4 Slide the bottom hinge cover forward and away from the oven 5 Toinstall reverse t
47. forward while pressing back the spring clip on the left side of the fan shroud 4 Slide theintake cover slightly forward and to the left for removal 5 Pivotthe lower edge of the intake cover forward and the upper edge back to carefully remove it from the oven EPI Figure 37 Intake Cover Removal Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES Remove fourthumb screws Figure 38 fromthe corners of the fan shroud Pivotthe bottom ofthe fan shroud forward and the upper edge back to carefully remove it from the oven Retaining Slot Retaining Slot Figure 38 Fan Shroud Fan Blade Removal Perform the Internal Access procedure Measure and note the distance from the end of the motor shaft Figure 39 to the outer edge of the fan blade mounting clamp typically 1 inch Figure 39 Fan Blade Removal SM 27 Service Manual Enviro Star GCSF ES 3 4 Loosen the two set screws securing the fan blade to the motor shaft Slide the fan blade Figure 40 assembly the motor shaft A puller may be necessary to remove fan blade n
48. g the water solenoid to the mounting bracket SM 35 Service Manual Enviro Star GCSF ES 9 Tag and disconnect two water lines from the solenoid 10 Remove the solenoid from the oven 11 Position the water solenoid for installation and secure with two screws 12 Using tags created during removal connect two water lines to the solenoid 13 Using tags created during removal connect wires to the solenoid 14 Connectthe exterior water line to the inlet pipe and turn the water ON 15 Check for and repair any water leaks 16 Connectthe oven to external power and press the POWER button ON 17 Place the MANUAL BACKUP switch in the BACKUP position 18 Press the BACKUP STEAM switch to activate the water solenoid and check for leaks 19 Press the POWER button OFF to shut down the oven 20 Toinstall all previously removed parts reverse the above steps 21 Press the front panel POWER button ON to ensure the oven is operational Backup Thermostat Replacement WARNING ES PERFORM THE ELECTRICAL LAS LOCKOUT TAGOUT PROCEDURE 7 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual Perform the Electronics Access procedure Perform the Right Side Panel Removal procedure 4 Placeasmallscrewdriver behind the BACKUP THERMOSTAT knob and gently pry off 5 Remove the two mounting screws Remove the thermostat from the back of the mounting p
49. ge on wire 51 to ground for 120 VAC If available and motor is not working replace draft inducer fan motor Bad draft inducer air proving switch With the power switch OFF remove wires 54 and 34 from the air switch Use an Ohmmeter to check switch continuity Place the wires back on the air switch and turn the oven ON Wait for the draft inducer to turn ON and check for 24 VAC at wire 54 If the reading is correct the air switch is good SM 44 Lang A Division of Star Mfg Int l Inc TM OVEN PROBLEMS Cont SYMPTOMS POSSIBLE CAUSE Service Manual for Enviro Star GCSF ES SUGGESTED REMEDY Oven heats up but fan motor will not work Bad motor run relay MR2 With the power switch OFF use an Ohmmeter to check 35 Ohms resistance at the motor run relay MR2 coil between wires 34 and 35 If open replace the relay Bad motor capacitor With the power switch OFF perform a capacitance test on the capacitor Replace the capacitor if defective Bad main motor With the oven ON check for 120 VAC between motor at wire 11 and N Wht or ground If available and motor is not running replace motor Oven continues to heat Bad temperature probe Preheat oven to 350 Disconnect the temperature probe cable from the circuit board Use an Ohmmeter to check resistance across the probe leads If resistance is higher or lower than 982 7 5 Ohms replace the probe Bad gas
50. he above steps Door Chain and Turnbuckles Removal 1 Perform the Bottom Hinge Cover Removal procedure Ensure the oven doors are fully closed Locate the door chain and count the number of chain link pins typically 8 found between the end of the turnbuckle and the gear tooth that faces out perpendicular to the door NOTE When assembly is performed ensure the chain is in this same position 4 Loosen locking nut seated against one of the two turnbuckles 5 Loosen turnbuckle until the turnbuckle and threaded shaft separate and loosen the chain from the associated gear Mounting Hole Mounting Hole Figure 61 Bushing Plate Location 6 Behind the chain and gear remove two bolts and lock washers holding the lower door bushing plate Figure 61 against the oven frame SM 40 64 Serzes CAUTION Use care to prevent the door chain and turnbuckles assembly from falling away from the oven and causing any damage 7 Gently pry the bushing plate down and away from the door post and bushing 8 Repeatsteps 5 and remove the other lower door bushing plate and remove the chain and turnbuckle assembly 9 When assembly is performed ensure the two turnbuckles are properly adjusted so the doors close together the rightdoor swings into place first 10 Toinstall reverse the above steps Left Oven Door Removal 1 Perform the Top Hinge Cover Removal procedure
51. he fan and TIMER stop then restart when the door is closed Turnboth the TIMER KNOB and TEMP KNOB to zero Confirm that the fan stays on until the temperature drops below 250 F Lang A Division of Star Mfg Int l Inc a Water Steam Test Follow these steps to verify the water and steam operation ofthe oven 1 Identify the water purification system used 2 Flush the water system to remove tainted water from the system 3 Put the oven into Backup mode and set the temperature to 400 F Steamer Assembly Figure 16 Water Steam System Water Stall 4 Once up to temperature use the STEAM SWITCH on the control panel Figure 17 to flush water through the steam system water stall Figure 16 for one minute 5 Checkthe water drain for proper operation Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES Operating Sequence NOTE Hefer to the Lang GCSF ES GCSF EZ Installation and Operation Instructions for full operational description including optional features ENVIRO gr 1 Shot Steam 2 Pulse Steam Fan LED Temp E Indicator 335 Power Temp Knob LED Timer Screen H Timer Knob BACKUP CONTROL ACCESS DOOR Figure 17 Electronic Control Panel SM 15 Service Manual
52. inch and straight down for removal 6 Toinstallrightside panel reverse above steps SM 25 Service Manual Enviro Star GCSF ES Temperature Sensor Replacement WARNING PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual Perform the Electronics Access procedure 3 Performthe External Right Side Panel Removal procedure 4 Disconnect the temperature sensor plug from the circuit board connector Figure 23 and pull the tube through the grommet in the drawer Oven Sensor i RARE Figure 34 Temperature Sensor Location 5 Graspthe sensor Figure 34 nearthe entry into the oven push it out of the oven and into the electronics drawer 6 Pullthe sensor out of the oven wall and into the electronics drawer 7 Slidethetipofthe new sensorthrough the oven wall hole into the oven 8 Slide the tip of the sensor through the holes and into the mounting bracket until it protrudes inch from the end of the bracket 9 Pass the temperature sensor tube Figure 35 through the grommetinto the electronics drawer 10 Attach the connector to the circuit board Figure 23 11 Toinstall all previously removed parts reverse the above steps SM 26 Temperature Sensor Figure 35 Temperature Sensor 12 Slide the electronics drawer closed but do not install the mounting scre
53. itch has two settings HI and LOW The fan is mounted inside the oven and must be ON when the oven is in operation The main burner heats the oven through the burner box The main burner flames do not come into contact with the air inside the oven The fan circulates the air inside the oven over the lower surface and maintains a constant even temperature The motor control reverses the direction of the fan periodically to provide consistent baking operation SM 9 Service Manual Enviro Star GCSF ES Figure 6 Fan Motor Connections The fan motor Figure 6 operates on 120 VAC Three relays operate on 24 VAC control motor The relays function as follows Motorrelay 1 MR1 ON OFF controls fan rotation by reversing the phase of the motor windings Motor relay 2 MR2 ON OFF controls motor operation by routing 120 VAC to the fan motor e Motorrelay 3 ON OFF controls fan speed by routing 120 VAC to the motor windings SM 10 2 When the oven door is closed the door switch Figure 7 grounds four motor relays MR2 the ignition control module the gas solenoid and the igniter When the door is open the ground is removed and the fan motor and gas to the burner shuts off When the door is open the ignition control module and igniter cannot operate Door Switch Operation DOOR CLOSED Figure 7 Door Open Closed Lang A Division of St
54. l Inc Position the new burner for installation and secure the burner with two screws into the heat exchanger 9 Ensurethe burneris level before continuing NOTE If the burner is installed at an angle it will NOT heat up the Flame Sensor Probe 10 Toinstall all previously removed parts reverse the above steps 11 Turn the external gas supply ON and press the POWER button ON to ensure the oven is operational Figure 46 Burner Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES Heat Exchanger Replacement WARNING THE HEAT EXCHANGER IS VERY HEAVY USE A BRACE UNDERNEATH THE HEAT EXCHANGER FIGURE 48 FOR SUPPORT BEFORE REMOVING THE MOUNTING SCREWS Performthe Burner Replacement procedure 2 Remove the top and middle left panel screws Figure 47 near the heat exchanger Remove These Two Screws Figure 47 Left Panel Mounting Screws 3 Remove eight mounting screws from the sides of the heat exchanger 4 Place the handle of a screwdriver under the brace Figure 48 and apply upward pressure on the heat exchanger while removing four screws at the top 5 Use the brace to support the heat exchanger while working it out of the mounting position 6 Tilt the top of the heat exchanger assembly forward toward the oven doors and lay it down on the brace 7 Carefully slide the hea
55. late 7 Tag and disconnect wires from the thermostat Cut the tie straps securing the thermostat tube Figure 55 SM 36 10 11 12 13 Thermostat Chek Series Knob Thermostat Figure 54 Thermostat Knob Figure 55 Thermostat Tube Pull the coiled temperature probe and tubing outthrough the oven wall Remove the complete thermostat assembly from the oven Unwrap approximately 18 inches of temperature probe tubing on the new thermostat Using tags created during removal connect wires to the new thermostat Being careful to not damage the temperature probe tubing slide the probe through the oven wall Lang A Division of Star Mfg Int l Inc 22 NOTE Ensure wires not pinched between the thermostat and the mounting plate 14 Position the thermostat for installation and secure with two screws 15 Slide the control knob onto the shaft 16 Inside the oven route the probe through the mounting guides until the tip extends about 11 2 inches past the third guide 17 Wrap excess thermostat tubing and secure with tie straps 18 Toinstall all previously removed parts reverse the above steps 19 Connectthe oven to external power and press the front panel POWER button ON to ensure the 15 operational Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES Backup Stea
56. m Control Switch Replacement ky WARNING S PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Electronic Access procedure 3 Perform the Right Side Panel Removal procedure Steam Switch Figure 56 Steam Switch Backup Controls 4 Tag and disconnect wires from the switch Figure 56 5 Remove the mounting ring at the front of the toggle switch and pull the switch out through the mounting plate 6 Using tags created during removal connect wires to switch 7 Insert shaft of the new switch through the mounting plate and install the mounting ring 8 Toinstallall previously removed parts reverse the above steps 9 Connectthe ovento external power source and press POWER button ON to ensure the oven is operational SM 37 Service Manual Enviro Star GCSF ES Manual Backup Switch Replacement WARNING SY gt PERFORM THE ELECTRICAL US LOCKOUT TAGOUT gt PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Electronic Access procedure 3 Perform the Right Side Panel Removal procedure 4 Tag and disconnect wires from the MANUAL BACKUP switch Figure 57 1 Manual Backup Switch Figure 57
57. nsformer Replace fuse or circuit breaker Replace controller Thermostat ON no ignition Miswired Bad thermostat no 24 VAC at thermostat terminal W Failed igniter Check wiring and correct Replace thermostat Check Air Switch Valve ON no igniter Bad igniter Miswired Bad controller check voltage at igniter Check for 24VAC at S1 and wire 34 Check wiring and correct Replace controller Igniter ON no Valve coil open Open valve wire Bad controller check voltage at gas valve terminal for 24V Replace coil Replace wire Replace controller Flame okay during TFI no flame sense after TFI Flame Sensor Current Test Flame current is the current that passes through the flame fromthe sensorto ground The minimum flame current necessary to keep the system from lockoutis 1 0 micro amp To measure flame current connect an analog DC micro ammeter to the FC terminals on the ignition control module Figure 67 The meter reading should be 1 0 micro amp or higher Bad igniter Bad S2 Sensor wire Poor ground at burner Poor flame check flame current as indicated below Replace igniter Clean flame sensor and check wire to S2 Repair ground Perform Flame Sensor Current Test if necessary replace module ANALOG DC MICROAMETER IGNITER MODULE USE MICROAMP Figure 67 Flame Sensor Current Test Lang A Division of Star Mfg Int l Inc SM 49 S
58. nsistent condition LED TEMPERATURE INDICATOR e Displays oven temperature e ON indicates oven at set point e Blinks with forheator cooling to temperature TEMPERATURE KNOB Used to oven temperature e Dialto desired temperature TIMER SCREEN LED digital display Displays time remaining in cooking cycle Displays time selection for Steam Pulse Displays time selection for Steam 1 Shottime TIMER KNOB e Sets cooking time e Sets Steam Pulse time Sets Steam 1 Shot time COOK HOLD e Activated when cooking cycle stops a beeper will sound 5 times Beeper will sound 5 times e COOK HOLD light will turn OFF e Oventemperature will drop 150 F Temperature will remain at 150 F until operator chooses anew cooking cycle or turns the oven OFF SM 13 Service Manual Enviro Star GCSF ES 1 SHOT STEAM Provides a 1 20 second single shot of steam to the cooking chamber e Adjust by holding down the button while turning the TIMER KNOB until the desiredtimeis displayed on the LED TIMER SCREEN Figure 13 PULSE STEAM e Sends a 1 secondshotof steam to the cooking chamber e Adjust time from 1 120 seconds by holding down the button and turning the TIMER KNOB until the desired time is displayed on the LED TIMER SCREEN Using Backup Controls The EnviroSTAR oven is designed with a set of backup controls that can be used manually instead of usingthe electronic ov
59. ntrols ignition of the burner gas The module monitors burner ignition heat and shut down Lang A Division of Star Mfg Int l Inc SPECIFICATIONS Igniter amp Flame Sensor Fenwal 35 66 Series Igniter Module INPUT POWER Voltage Current Control 18 to 30 VAC 50 60 HzLine 24 VAC 300 24 with fan and gas valve relay energized OUTPUT POWER Gas Valve 2 0A max 24 VAC OPERATING TEMPERATURE 40 F to 175 40 C to 80 C FLAME SENSITIVITY 0 7 micro amps minimum IGNITER 24 Trail for Ignition 7 Seconds Inter Purge 15 Seconds Pre Purge 15 Seconds Tries for Ignition 3 Tries with 1 Hour Automatic Reset Post Purge None Options NOTE Followthe wiring diagram and gas flow chart None to better understand the ignition description SM 7 Service Manual Enviro Star GCSF ES The oven ignition and control system operates on 120 and 24 VAC When the power switch is placed inthe ON position 120 VAC is routed through fuse F7 15A The voltage from the fuse is routed to one side incoming ofa 24 VAC transformer Figure 3 The other side of the transformer incoming is connected to a neutral input Transformer Figure 3 Transformer The transformer converts the 120 VAC to 24 VAC and routes the 24 VAC through the outgoing side through a back up switch a back up thermostat switch
60. or 12 VAC between pins 1 and 2 and between pins 2 and 3 If the voltage is not correct replace transformer Lang A Division of Star Mfg Int l Inc SM 43 Service Manual Enviro Star GCSF ES De Sor LES OVEN PROBLEMS Cont SYMPTOMS POSSIBLE CAUSE SUGGESTED REMEDY Oven does not heat Over temperature switch is tripped With power switch ON use a voltmeter to check voltage across wires 37 and 45 If voltage is available replace the over temperature switch Bad temperature probe Preheat oven to 350 F and disconnect the temperature probe cable from the circuit board Use an Ohmmeter to check resistance across the probe leads If probe resistance is higher or lower then 982 7 5 Ohms replace the probe Bad igniter With the power switch ON check for 24 VAC between wire 52 ignition control module 51 terminal and ground If voltage is present and the igniter does not glow replace the igniter Bad ignition control module Check wires 30 and 34 S1 and Ground at the ignition control module for 24 VAC If available check wires 55 and 34 MV1 and Ground for 24 VAC If available check the igniter or gas solenoid Bad gas solenoid Disconnect AC power from the oven and remove wires 55 and 34 from the coils on the gas solenoid and measure resistance of each coil If a coil is open or shorted replace the gas solenoid Bad draft inducer fan With the power switch ON check for volta
61. ounting screws from the upper left and lower right corners 6 Tag and disconnect wires from the ignition controller 7 Position the new ignition controller and secure with two screws Ignition Controller Figure 32 Ignition Controller 8 Using tags created during removal connect wires to the replacement controller 9 Slidethe electronics drawer closed but do not install mounting screws 10 Connectthe ovento external power and press the POWER button ON to ensure the oven is operational 11 Securethe electronics drawer with four screws Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES Right Side Panel Removal The gas valves water valves and connections are mounted behind the right side panel CAUTION Sheet metal edges can cut Avoid bare hand contact with metal edges Wear protective gloves during installation operation cleaning and maintenance PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Remove four screws from the right side panel Figure 33 at rear of the oven Figure 33 Right Side Panel 3 Remove the two screws from lower edge of the right side panel 4 Remove two screws from the upper edge of the right side panel NOTE right side panel has a flange along the top bottom and rear 5 Carefully slide the side panel back about 34
62. ove two mounting screws from the wire cover Figure 25 pivot cover to the left and remove 4 Cutthe ties securing transformer wires Remove two screws securing transformer Figure 26 to the drawer base Tag and disconnect transformer wires Position replacement transformer and secure with two mounting screws 8 Using tags created during removal connect wires to the replacement transformer Figure 26 Transformer 9 Secure the wiring with plastic ties 10 Slide the electronics drawer closed but do not install mounting screws SM 22 Lang A Division of Star Mfg Int l Inc Chen Series Beeper Removal PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Electronics Access procedure 3 Remove the beeper connector from the circuit board Figure 27 Beeper Figure 27 Beeper Location 4 While holding the beeper remove the mounting ring from the side of the drawer housing 5 Install the new beeper and connect the cable connector into the circuit board 6 Slide the electronics drawer closed but do not install mounting screws 7 Connect oven to external power and press the POWER button ON to ensure the oven is operational 8 Secure electronics drawer with four screws and tighten securely Lang A Division of Star Mfg Int l Inc Service Manual for
63. re 5 and gas stops flowing to the burner Lang A Division of Star Mfg Int l Inc Service Manual Enviro Star GCSF ES INDUCER BLOWER DC MICROAMETER FOR TEST ONLY DIAGNOSTIC NOTE See the troubleshooting section for instructions on performing a flame sensor current check Figure 5 Igniter Controller Diagram If flame is not detected during the TFI the main gas valve solenoids close and a 15 second inter purge delay starts The control will attempt two additional TFI periods before locking out In lockout the main gas valve solenoids will be locked out immediately The controller will reset after one hour if the thermostat is still calling for heat A new sequence will begin NOTE f locking out occurs a manual reset must be performed by resetting the thermostat or removing 24 VAC turn off the power switch period of 5 seconds The following table lists the igniter terminals and functions NOTE See the Troubleshooting section for instructions on performing a flame sensor current check Lang A Division of Star Mfg Int l Inc Igniter Module Terminal Uses Figure 5 Igniter Output 24 VAC 24 VAC Input Not Used Flame Sensor Input Air Proving Switch Thermostat Input Main Gas Valve Solenoids Output Ground Input 120 VAC Input 120 VAC Fan Drive Output Not Used 24V Hot to Transformer Fan Operation The fan sw
64. solenoid With the oven ON check voltage between wires 55 and 34 on the gas solenoid If 24 VAC is not available replace the gas solenoid If voltage is available check the circuit board Bad circuit board Lang A Division of Star Mfg Int l Inc With the oven ON check pin 5 wire 39 for 24 VAC on the circuit board If 24 VAC is available and oven is at temperature replace the circuit board SM 45 Service Manual Enviro Star GCSF ES oO LES OVEN PROBLEMS Cont SYMPTOMS POSSIBLE CAUSE SUGGESTED REMEDY Motor runs only in one Bad motor FWD REV relay MR1 With the power switch OFF use an direction Ohmmeter to check for 35 Ohms resistance at the motor run relay coil between wires 34 and 35 If relay is open replace the relay Bad FWD REV relay MR1 With the power switch OFF perform a capacitance test on the capacitor Replace the capacitor if defective Bad circuit board With oven ON check for 24 VAC at motor wire 41 and ground After two minutes voltage should drop off if not replace circuit board Motor runs constantly Bad temperature probe With oven OFF and oven temperature under 250 degrees F the fan should not run Check the resistance of the Temperature Probe Preheat oven to 350 F and disconnect the temperature probe cable from the circuit board Use an Ohmmeter to check resistance across the probe leads If resistance is higher or lower than 982 7
65. t exchanger assembly out of the oven 8 Place the new heat exchanger assembly onthe brace and slide it into the oven 9 Tipthe heat exchanger up and use the brace to carefully work it into position SM 31 Service Manual Enviro Star GCSF ES Press Down Screwdriver Figure 48 Heat Exchanger Removal and Installation 10 Place the handle of a screwdriver under the brace Figure 48 and apply upward pressure on the heat exchanger while installing four screws at the top and eight screws on the sides 11 Toinstall all previously removed parts reverse the above steps 12 Turn the external gas supply ON and press the POWER button ON to ensure the oven is operational Steamer Assembly Water Stall Replacement ky WARNING 1 2755 PERFORM THE ELECTRICAL S LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual Perform the Internal Access procedure Performthe Fan Blade Removal procedure Remove two screws and washers from the left side and four screws and washers the right side of the steamer assembly Figure 49 5 Useaflatblade screwdriver to carefully pry the assembly away from the rear oven wall NOTE The steamer assembly water outlet tube at the bottom will slide out of the drain tube as the assembly is removed 6 Slide the steamer assembly towards the oven doors andremove it SM 32 A Position the new s
66. teamer assembly against the right side wall and push to the rear so the water outlet tube slides into position install all previously removed parts reverse the above steps Press the front panel POWER button ON to ensure the oven is operational Steamer Assembly Figure 49 Steamer Assembly Lang A Division of Star Mfg Int l Inc Che Series Over Temperature Switch Replacement PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Internal Access procedure Remove four mounting screws Figure 50 Carefully pull the switch and wires into the oven 5 disconnect wires from the switch Using tags created during removal connect the wires to the new switch 7 Push excess wire back into the access hole Position the switch for installation and secure with four mounting screws 9 Toinstall all previously removed parts reverse the above steps 10 Turn the electric supply ON and press the POWER button ON to ensure the oven is operational O Oven Temperature 550 Figure 50 Over Temperature Switch Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES Main Gas Solenoid Replacement WARNING PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE WARNI
67. ternal Right Side Panel Removal procedure 2 Opentheoven doors approximately eightto ten inches Figure 18 Electronics Drawer SM 19 Service Manual Enviro Star GCSF ES 3 Remove four screws located at the top and bottom of the front panel 4 Carefully slide the electronics drawer Figure 18 outfrom the oven Main Power Fuse Replacement WARNING PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual Perform the Electronics Access procedure 3 Locate the fuse block Figure 19 in the electronics drawer Figure 20 Drawer Figure 19 Fuse Locator 4 Use an Ohmmeter to ensure the fuse is open before replacing it An ohm reading indicates the fuse has continuity and is good 5 Using a fuse puller or similar tool remove the fuse 6 Install an exactreplacement fuse Figure 21 in the fuse holder Class G Type SC 15 Time Delay rated for 600 VAC SM 20 p Series Slide the electronics drawer closed but do not install mounting screws Connect the oven to external power and press the front panel POWER button to ensure the oven is operational When proper operation is determined install and tighten four mounting screws 8 10 ON ED PROTECTI SHOCK REPLACE E AND RATING
68. tighten securely 12 Use two tie wraps to secure the valve to the backup control bracket 13 Turnthe external gas line valve ON and perform the Gas Leak Test at both the input and output sides of the manual gas valve Lang A Division of Star Mfg Int l Inc TM 14 Press the POWER button ON to ensure the ovenis operational Figure 52 Manual Gas Valve 15 Adjustthe oven temperature control to open the gas valve and ignite burner 16 Perform the Gas Leak Test at all visible gas connections 17 Turn the oven OFF 18 Toinstall all previously removed parts reverse the above steps Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES Water Solenoid Replacement ky A WARNING S PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Turn OFF water supply to the oven Perform the Electronics Access procedure Place a bucket under the water input loosen the external water coupling and allow the water to drain from the water inlet line 5 Perform the Right Side Panel Removal procedure Solenoid Figure 53 Water Solenoid 6 Taganddisconnectwires from the water solenoid Figure 53 7 Loosenthe two water line fittings on side ofthe solenoid NOTE Expect some water leakage when loosening the water line fittings 8 Remove two screws securin
69. tion of the draft inducer the pressure switch is often referred to as a proving switch The terms mean the same thing and both refer to the switch monitoring the draft inducer air flow SM 12 we Series TO AIR PROVING SWITCH Figure 12 Igniter Controller Internal Switch During oven operation combustion air flow is monitored by the proving switch pressure switch Ifthe switch contacts remain closed for 30 seconds during ignition sequence without an output signal to the draft fan an airflow fault will be generated Ifthe pressure switch proving switch contacts open during a call for heat operation the controller Figure 12 will begin a pre purge period and atrail for ignition sequence If the pressure switch proving switch contacts remain open for 30 seconds after draft inducer fan output F1 and F2 begins an airflow fault will be signaled and the fan will remain ON Ifthe pressure contacts open later during a call for heat the controller will begin a pre purge period and the trail for ignition sequence If the airflow signal PS is lost while the burner is firing the controller will immediately de energize the main gas valve solenoid and an airflow fault will be displayed The controller will continue to monitor the proving switch pressure switch input waiting for airflow to return When airflow is detected a trail for ignition sequence will begin followed by a pre purge period If airflow does not r
70. uit board With oven ON and not in steam mode check for 24 VAC between wires 43 and 32 If voltage is present replace the control circuit board Bad light relay LR1 With the oven OFF use an Ohmmeter to check resistance of light relay LR1 coil between wires 42 and 32 Resistance should be 35 ohms Replace the relay if open If resistance is 35 ohms connect wires 42 and 32 to the relay Turn the oven ON and check for 24 VAC between the wires If 24 VAC is available replace the light relay LR1 Bad light bulbs Check bulbs and replace as needed SM 48 Lang A Division of Star Mfg Int l Inc 4 IGNITION CONTROL MODULE PROBLEMS CAUTION Only qualified service technicians should perform tests listed in this troubleshooting table Service Manual for Enviro Star GCSF ES Maintenance and service on this appliance should be performed only by qualified service technicians trained in appliance and test equipment operation and diagnostic and safety procedures This troubleshooting table does not cover every possible problem or condition that may occur during operation Qualified service technicians can perform tests and determine the necessary action for problems not listed in the table SYMPTOM POSSIBLE CAUSE SUGGESTED REMEDY Does not start Miswired Bad 24 VAC transformer Bad fuse circuit breaker Bad controller check LED for steady on or flashing codes Check wiring and correct Replace tra
71. up Position the fan blade with the clamp facing away from the motor Position the fan blade assembly with one set screw pointing up and the second pointing to the left Slide the fan blade onto the motor shaft Using the measurementtaken during removal position the fan blade on the motor shaft and tighten set screws securely Toinstall all previously removed parts reverse the above steps Connectthe oven to external power and press the POWER button ON to ensure the oven is operational Lang A Division of Star Mfg Int l Inc Cle Seres Motor Small Fan Blade Installation WARNING PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Performthe Fan Motor Replacement procedure up to removing the small fan blade 3 Ontheold motor measure and note the distance fromthe end ofthe motor shaftto the outer edge ofthe smallfan blade mounting clamp typically 7 3 8 inches 4 Loosenthe mounting clamp set screw and slide the small fan off the motor shaft 5 With the clamp facing away from the motor slide the fan blade onto the motor shaft 6 Position the small fan blade the distance measured during removal andtighten set screw securely Figure 42 Small Fan Blade Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES Burner Area Access WARNING PERFORM THE E
72. ure Replacement PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE This procedure can damage the porcelain finish around the lamp fixture Use care to avoid or reduce damage 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Perform the Electronics Access procedure 3 Inside the electronics area locate the defective light fixture 4 Tagand disconnect two power connectors Inside the oven locate the defective light and carefully turn the glass lens counter clockwise to remove it from the light 6 Rotate the bulb counter clockwise and remove it from the light fixture 7 Use a flashlight to illuminate the inside of the light fixture and locate the two pairs of interconnected tabs Figure 59 securing the light fixture to the oven housing Alignment Mounting Tabs Mounting Tabs Figure 59 Light Fixture 8 Use asmall screwdriver or similar tool to raise the two interconnected tabs along one side of the light fixture 9 Insertasecond screwdriver through one of the oval shaped holes in the fixture to pry the edge of the fixture away from the oven housing Lang A Division of Star Mfg Int l Inc Service Manual for Enviro Star GCSF ES 10 When one side of the fixture is positioned away from the oven housing use the small screwdriver to raise the tabs on the other side of the fixture and remove the fixture from the mounting hole inside the oven 11 Hold the n
73. ws 13 Connect the oven to external power and press the POWER button ON to ensure the oven is operational 14 Secure the electronics drawer with four screws Fan Motor Starter Capacitor Replacement PERFORM THE ELECTRICAL LOCKOUT TAGOUT PROCEDURE 1 Perform the Electrical Lockout Tagout procedure found on page 18 of this manual 2 Remove the motor access panel at the rear of the oven A WARNING ELECTRICAL HAZARD THE CAPACITOR MAY BE CHARGED 3 Removetherubber boot covering the connectors onthe motor starting capacitor Figure 36 4 Discharge the capacitor Tag and disconnect wires from the capacitor Remove three screws securing the capacitor mounting straps to the rear housing 7 Remove mounting straps from the capacitor and install onto the new capacitor 8 Position the new capacitor for installation Secure the capacitor with three screws in the mounting straps Lang A Division of Star Mfg Int l Inc TM 10 Using tags created during removal connect wires to the new capacitor 11 Position the motor access panel at the rear of the oven 12 Connectthe oven to external power and press the POWER button ON to ensure the oven is operational Fan Motor Figure 36 Fan Motor Starter Capacitor Internal Access 1 Removethe cooking racks from the oven 2 Removethe rack guides from the left and right oven walls 3 Grasptheleftedgeofthe intake cover Figure 37 andpullthe cover
74. y Panel added carbon monoxide to the list of hazardous chemicals known to cause reproductive harm In orderto establish full compliance with Proposition 65 we attached a yellow warning label to each gas fired unit manufactured by the Montague Company Carbon monoxide would not be present in concentrations that would pose a significant risk3 to the consumer when the equipment is installed operated and maintained as follows 1 Installed in accordance with all local codes or in the absence of local codes with the current National Fuel Gas Code Z223 1 Latest Addendum 2 Installed under a properly designed and operating exhaust hood 3 Connected to the type of gas for which the unit is equipped 4 Proper appliance pressure regulator installed on the gas supply line and adjusted for the manifold pressure marked on the rating plate 5 Adequate air supply to the unit 6 The equipment is operated in the manner intended using the proper utensil for that type of appliance 7 Keep the equipment clean and have it checked periodically 8 Burner air adjustments mechanical maintenance and repair procedures should be performed by qualified service personnel If the equipment is not installed operated and maintained in accordance with the above concentrations of carbon monoxide in excess ofthe established limits could be present in the kitchen environment ALL PERSONNEL IN THE WORKPLACE WHO MAY BE SUBJECT TO ANY EXPOSURE OF CARBON

Service Manual 08/01/2008 (Rev. -)

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