SERVICE MANUAL SG SERIES GAS CONVECTION OVENS MODELS SG4 SG6 STACKED SG44 MODELS SG66 - NOTICE - This Manual is prepared for the use of trained Vulcan Service Technicians and should not be used by those not properly qualified. 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. The reproduction, transfer, sale or other use of this Manual, without the express written consent of Vulcan, is prohibited. This manual has been provided to you by ITW Food Equipment Group LLC ("ITW FEG") without charge and remains the property of ITW FEG, and by accepting this manual you agree that you will return it to ITW FEG promptly upon its request for such return at any time in the future. A product of Vulcan-Hart 3600 North Point Blvd Baltimore, MD 21222 F45525 Rev. B (1118) SG SERIES GAS CONVECTION OVENS TABLE OF CONTENTS SERVICE UPDATES ....................................................................................... 4 SERVICE UPDATES - SG .............................................................................. 4 GENERAL .................................................................................................. 5 INTRODUCTION ....................................................................................... 5 INSTALLATION ........................................................................................ 5 OPERATION ........................................................................................... 5 CLEANING ............................................................................................. 5 LUBRICATION ......................................................................................... 5 SPECIFICATIONS ...................................................................................... 5 TOOLS ................................................................................................. 5 REMOVAL AND REPLACEMENT OF PARTS ............................................................... 6 COVERS AND PANELS ................................................................................ 6 TOP FRONT COVER ............................................................................... 6 BOTTOM FRONT COVER .......................................................................... 6 CONTROL PANEL ................................................................................. 6 RIGHT SIDE PANEL ................................................................................ 6 CONTROL PANEL COMPONENTS ..................................................................... 7 COMPONENT PANEL COMPONENTS ................................................................. 7 TEMPERATURE PROBE ............................................................................... 8 GAS BURNER ......................................................................................... 9 GAS ORIFICE .......................................................................................... 9 GAS SOLENOID VALVE .............................................................................. 10 IGNITION CONTROL MODULE ....................................................................... 11 SPARK IGNITER AND FLAME SENSE ................................................................ 12 BLOWER AND MOTOR ENDING AT PRODUCTION DATE OF 3/18/2018 .............................. 13 BLOWER AND MOTOR STARTING AT PRODUCTION DATE OF 3/19/2018 ........................... 15 OVEN DOORS AND BEARINGS (INDEPENDENT DOORS) ENDING AT PRODUCTION DATE OF 1/21/2018 ............................................................... 16 OVEN DOORS (INDEPENDENT DOORS) STARTING AT PRODUCTION DATE OF 1/22/2018 ......... 17 ROLLER LATCH ASSEMBLY (INDEPENDENT DOORS) ............................................... 18 DOOR WINDOW ...................................................................................... 18 DOOR SWITCH ....................................................................................... 19 HIGH LIMIT THERMOSTAT ........................................................................... 19 INTERIOR LIGHTS .................................................................................... 20 COOLING FAN ........................................................................................ 20 INTERIOR LIGHTS (REAR MOUNTED, ROUND) ...................................................... 21 INTERIOR LIGHTS (SIDE MOUNTED, SQUARE) ...................................................... 21 DOOR ADJUSTMENT ................................................................................. 23 SERVICE PRODCEDURES AND ADJUSTMENTS ......................................................... 25 SOLID STATE TEMPERATURE CONTROL CALIBRATION ............................................ 25 SOLID STATE TEMPERATURE CONTROL TEST ..................................................... 26 TEMPERATURE PROBE TEST ....................................................................... 27 GAS VALVE PRESSURE CHECK ..................................................................... 27 VERIFICATION OF SPARK AT IGNITOR .............................................................. 28 DOOR SWITCH ADJUSTMENT ....................................................................... 29 BLOWER ADJUSTMENT .............................................................................. 29 DOOR ADJUSTMENT ................................................................................. 30 DOOR STRIKE ADJUSTMENT (INDEPENDENT DOORS) ............................................. 31 FLAME SENSE CURRENT TEST ...................................................................... 31 ELECTRICAL OPERATION ................................................................................ 34 COMPONENT LOCATION ............................................................................. 34 COMPONENT FUNCTION ............................................................................ 37 SEQUENCE OF OPERATION ......................................................................... 38 F45525 Rev. B (1118) Page 2 of 46 SG SERIES GAS CONVECTION OVENS NORMAL CYCLE ................................................................................. 38 COOL DOWN CYCLE (SOLID STATE TEMPERATURE CONTROL) ................................ 40 SCHEMATICS ........................................................................................ 41 WIRING DIAGRAM .................................................................................... 42 TROUBLESHOOTING ..................................................................................... 44 ALL MODELS ......................................................................................... 44 IGNITION MODULE DIAGNOSTICS ................................................................... 45 © VULCAN 2018 Page 3 of 46 F45525 Rev. B (1118) SG SERIES GAS CONVECTION OVENS - SERVICE UPDATES SERVICE UPDATES SERVICE UPDATES - SG October 2018 • FLAME SENSE CURRENT TEST • OVEN DOORS (INDEPENDENT DOORS) Starting at Production Date of 1/22/2018 • INTERIOR LIGHTS (Rear Mounted, Round) • INTERIOR LIGHTS (Side Mounted, Square) • DOOR ADJUSTMENT • COMPONENT LOCATION • SCHEMATICS • WIRING DIAGRAM • IGNITION MODULE DIAGNOSTICS F45525 Rev. B (1118) Page 4 of 46 SG SERIES GAS CONVECTION OVENS - GENERAL GENERAL INTRODUCTION Procedures in this manual will apply to all models unless specified. Pictures and illustrations can be of any model unless the picture or illustration needs to be model specific. MODELS FEATURES OPTIONS MODEL CAVITY TEMPERTURE COOK BLOWER DOORS (50/50) CASTERS DEPTH CONTROL TIMER 208/240/60/1 SG4 26.5" Solid State Independent 1-Hour Dial Optional Optional SG6 30.5" Solid State Independent 1-Hour Dial Optional Optional INSTALLATION Natural - Recommend (in. W.C.) 8.0, Min 6.0 Propane - Recommend (in. W.C.) 11.0, Min 11.0 Refer to the Installation and Operation Manual for Maximum 14.0 in. W.C. (Nat. or Prop.) detailed installation instructions on single or stacked ovens. TOOLS OPERATION Standard • Standard set of hand tools Refer to the Installation and Operation Manual for specific operating instructions. • VOM with ability to measure micro amp current VOM with minimum of NFPA-70E CAT III 600V, CLEANING UL/CSA/TUV listed. Sensitivity of at least 20,000 ohms per volt. Meter leads must also be rated at Refer to the Installation and Operation Manual for CAT III 600V. specific cleaning instructions. • Gear Puller to remove blower LUBRICATION Special • Temperature tester (thermocouple type) • Cavity blower motor has sealed bearings and • Manometer requires no additional lubrication. • Huskey™ TF-1000 grease or equivalent high temperature Teflon grease. SPECIFICATIONS Electrical Voltage - 120/60/1 Amps - 8.0 Amps Input BTU Rating Natural Gas - 60,000 BTU input at 5.0 in. W.C. Propane Gas - 60,000 BTU input at 10.0 in. W.C. Gas Line Pressures Page 5 of 46 F45525 Rev. B (1118) SG SERIES GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS Control Panel 1. Remove three (3) screws on the right side which secure the control panel then pull the panel away from the oven. Disconnect the electrical power to the machine