SERVICE MANUAL GAS BRAISING PANS (30 & 40 GALLON) VG30 ML-126847 VG40 ML-126848 VG40 SHOWN - NOTICE This Manual is prepared for the use of trained Vulcan Service Technicians and should not be used by those not properly qualified. If you have attended a Vulcan Service School for this product, you may be qualified to perform all the procedures described in this manual. This manual is not intended to be all encompassing.
GAS BRAISING PANS TABLE OF CONTENTS GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation, Operation and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAS BRAISING PANS GENERAL Model Designations INSTALLATION, OPERATION AND CLEANING Refer to the Installation & Operation Manual for specific instructions. ! VG30 - 30 gallon capacity ! VG40 - 40 gallons capacity TOOLS INTRODUCTION Standard The tilting braising pan (skillet) is a versatile piece of cooking equipment. It can be used to stew, simmer, steam, sear, pan fry, grill or saute food products over an evenly distributed heating surface.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. Front, Rear & Side Panels 1. Lift up on the bottom edge of panel until it clears the catch. 2. Tilt outwards and allow the panel to drop down. 3. Reverse procedure to install. 5. Tilt bottom of control panel outwards and pull down.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS 8. 9. Pull temperature dial from potentiometer shaft and remove mounting nut. 1. Remove front panel as outlined under COVERS AND PANELS. 2. Remove power supply box cover. 3. Remove the component being replaced. 4. Reverse procedure to install the replacement component then check for proper operation. Control panel is removed. 10. To install. A. Align tab on potentiometer with positioning bracket on panel. B.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS 7. Check calibration as outlined under TEMPERATURE CONTROLLER CALIBRATION. PAN POSITION/DOWN LIMIT SWITCH WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. 1. Remove front and left side panels as outlined under COVERS AND PANELS. 2. Disconnect conduit and remove pan position/down limit switch from switch mounting bracket. LEFT SIDE VIEW SHOWN 4.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS C. Place switch on its side with the head to the left and gear cam pointing up. D. Align roller arm adaptor with the four locking tabs pointing up and position one of the tabs at 0°. NOTE: The 0° position of the roller arm locking tab is the starting point for alignment only. The locking tab cannot remain at the 0° position.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS 7. Reverse procedure from step 5 to complete the installation. 8. Adjust pan position/down limit switch on switch mounting bracket as outlined under PAN POSITION SWITCH ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS. THERMOCOUPLE PROBE WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. G. 1. Access temperature controller as outlined under TEMPERATURE CONTROLLER . 2.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS 6. NOTE: Lead wires can be identified by label or marking on the wire. Reverse procedure to install and check for proper operation. 4. NOTE: When installing: Route thermocouple wire in the same manner thru the metal clamps on the hinge & frame. Tighten thermocouple just until it touches the pan; do not over tighten or damage to the thermocouple may occur. Loosen the strain relief nut and the hold down clamps for the motors' power cable.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS 7. 8. To install: A. With drive key on shaft, install motor to gear reducer. B. Route and secure the motors' power cable and re-connect motor lead wires. C. Replace power supply box cover and side panels. Check for proper operation. GEAR REDUCER WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. 1. Remove right side and rear panels as outlined under COVERS AND PANELS. 6.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS NOTE: On the bottom lift arm bushing, the bushing head must be positioned between the lift arm and the crank assembly to create approximately 1/32" spacing. 9. Reverse procedure from step 5 to complete the installation. 5. Disconnect lead wires from gas combination valve. 6. Disconnect pilot tube from gas combination valve. 7.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS 10. Check for proper operation. PILOT BURNER WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. WARNING: SHUT OFF THE GAS SUPPLY BEFORE SERVICING THE UNIT. WARNING: ALL GAS JOINTS DISTURBED DURING SERVICING MUST BE CHECKED FOR LEAKS. CHECK WITH A SOAP AND WATER SOLUTION (BUBBLES). DO NOT USE AN OPEN FLAME. 7. 1. Raise the pan to the full tilt position. 2.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS NOTE: Runner tube slides onto the gas orifice. When installing, ensure runner tube is fully seated onto gas orifice. 3. Lift burner at rear to clear the locating pin hole and slide burner toward the rear of burner box pan to clear the orifice. 4. To remove gas orifice for inspection or cleaning, disconnect the gas supply tube compression fitting at the manifold. 4.
GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS A. Slowly release downwards force to remove spring tension. B. Rotate lid spring lock nut to the next hole position then replace locking pin. Continue until all spring tension is removed, one position at a time. C. D. 4. To install: A. Slide the spring onto the lid spring mandrel. Insert spring into locator hole on the lid spring retainer. B. Slide the lid spring lock nut onto the lid spring mandrel.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER AND FOLLOW LOCKOUT / TAGOUT PROCEDURES, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS 12. Repeat the average temperature calculation for up to three attempts. Allow the pan to cycle at least two times between adjustments before performing the calculation. 7. Disconnect lead wire labeled "HT.0" from the COM terminal on the controller. 8. Verify 24VAC between the disconnected "HT.0" lead wire and ground. 13. If calibration is unsuccessful, the controller may be malfunctioning and cannot be adjusted properly.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS SPARK IGNITION TEST If the ignition control module is not generating a spark or the spark is not sufficient to light pilot burner, perform the following test. 1. Lower the pan to the full down position, turn the on/off switch on and set the temperature dial to call for heat. 2. Verify the ignition control module is receiving 24VAC between terminals 5 & 6. 3. A. If voltage is present, turn the on/off switch off and proceed to step 3. B.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS 11. Turn on/off switch on and set the temperature dial to call for heat. 12. Manually operate pan position/down limit switch and observe spark from ignitor. D. If ignitor is still not sparking, turn the on/off switch off, disconnect power to the machine and turn the gas supply off. 13. Install a replacement ignition control module and check for proper operation. PILOT BURNER FLAME ADJUSTMENT A. B.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS 10. Manually operate pan position/down limit switch and observe pilot burner flame. A. To increase pilot flame, turn the screw counterclockwise. To decrease pilot flame, turn the screw clockwise. 4. Set VOM to micro amp scale (DC) and connect the black meter lead (-) to the asterisk (*) terminal and red meter lead (+) to terminal 8. 5. Turn on/off switch on and set the temperature dial to call for heat. 6.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS 2. Ignition control module is energized and trial for ignition starts (90 seconds). A. Verify 24VAC between terminals 5 & 6. 1) 3. WARNING: SHUT OFF THE GAS SUPPLY BEFORE SERVICING THE UNIT. If voltage is not present, see schematic diagram. Pilot valve (PV) contacts close to energize the pilot valve coil, allowing gas flow to the pilot burner. A. If voltage is not present, replace ignition control module and check for proper operation.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS CAUTION: To prevent discoloration of the cooking surface, and possible pan warpage at temperature settings above 250°F, do not operate the braising pan unless the cooking surface is covered with water or a thin layer of cooking oil. 5. Allow burners to remain lit for at least five minutes. 6. Observe each burners< flame thru the opening in the front of the burner box. A. If the flame is blue, air shutter is adjusted properly.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS DC MOTOR CONTROLLER TEST A. If voltage is present but pan does not raise, refer to MOTORIZED LIFT OPTION ONLY under TROUBLESHOOTING. B. If voltage is not present and the fuse is ok, turn the on/off switch off and disconnect power to the machine. 11. Instal a replacement DC motor controller and check for proper operation. PAN POSITION/DOWN LIMIT SWITCH ADJUSTMENT NOTE: Do not use the motorized lift (if installed) for this procedure. 1.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS 8. 1) If main burners do not light, verify 24VAC input to the switch, and that the voltage is output from the switch. 2) If voltage is present on the output side of the switch, the switch is functioning properly. 3) If voltage is not present, install a replacement pan position/down limit switch and repeat this procedure to adjust. LEFT SIDE VIEW SHOWN Verify pan position/down limit switch N.O. contacts are opening. A.
GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS 3. To adjust: A. Place a 1 5/8" wrench on the lid spring lock nut and apply a downward force until locking pin can be removed. Continue to hold lock nut in place. CAUTION: Do not release wrench while locking pin is removed or damage to the braising pan may occur. 4. B. Apply additional downward force to increase spring tension; or slowly release downwards force to decrease spring tension. C.
GAS BRAISING PANS - ELECTRICAL OPERATION ELECTRICAL OPERATION COMPONENT FUNCTION BRAISING PAN CONTROLS Temperature Controller . . . . Monitors thermocouple input (type E) and regulates braising pan temperature. An external set point potentiometer is used for temperature adjustments. Transformer . . . . . . . . . . . . . Supplies 24VAC for heating circuit. If motorized pan lift option is installed, supplies 24VAC for lift control circuit. ON/OFF Switch . . . . . . . . . .
GAS BRAISING PANS - ELECTRICAL OPERATION COMPONENT LOCATION F25121 (February 2003) Page 26 of 32
GAS BRAISING PANS - ELECTRICAL OPERATION IGNITION CONTROL MODULE The ignition control module is energized when 24 volts is applied between terminals 5 & 6. The module outputs 24 volts from terminals 2 & 3 to the pilot valve coil (PV) on the gas combination valve, allowing gas flow to the pilot burner. At the same time, the module generates a spark voltage output of approximately 13K at terminal 9 to begin sparking at the ignitor/flame sense electrode.
GAS BRAISING PANS - ELECTRICAL OPERATION Motorized Pan Lift (Option) SEQUENCE OF OPERATION Refer to schematic diagram AI1341 for the electrical sequence of operation. Manual pan lift is the standard configuration. Refer to the dashed line sections labeled "MOTORIZED LIFT OPTION" on the schematic diagram for the integration of the motorized pan lift components into the sequence of operation. Heating 1. 1. Conditions. A. 120VAC to braising pan, polarity is correct, and is properly grounded.
GAS BRAISING PANS - ELECTRICAL OPERATION 5. Pan reaches full tilt position, the up limit switch N.C. contacts open and K1 relay coil is deenergized. A. 6. The three sets of K1 contacts return to N.O. position. Power is removed from the DC motor controller, the DC lift motor and pan travel stops. Operate the lift control switch to lower the pan (momentary on - lower). A. B. K2 relay coil is energized thru the down limit switch N.C contacts. 1) K2 4/7 N.O. contacts close. 2) K2 9/6 N.O.
GAS BRAISING PANS - ELECTRICAL OPERATION SCHEMATIC DIAGRAM F25121 (February 2003) Page 30 of 32
GAS BRAISING PANS - TROUBLESHOOTING TROUBLESHOOTING GAS HEATING (MANUAL LIFT OR MOTORIZED LIFT OPTION) SYMPTOMS No spark to ignite pilot burner gas, power on light is lit. POSSIBLE CAUSES 1. 2. 3. 4. 5. Spark at ignitor but pilot burner does not light. Pilot burner lights but will not maintain flame. 6. 1. 2. 3. 4. 5. 1. 2. 3. Main burner(s) do not light or will not maintain flame. Braising pan does not heat, power on light is lit. Braising pan does not heat, power on light is not lit.
GAS BRAISING PANS - CONDENSED SPARE PARTS LIST MOTORIZED LIFT OPTION ONLY SYMPTOM POSSIBLE CAUSES Pan will not raise. 1. 2. 3. 4. 5. 6. 7. 8. 9. Pan will not lower. 1. 2. Lid switch open (lid not opened) or malfunction. Transformer inoperative. On/off switch off or malfunction. Lift control switch malfunction (momentary on - raise). Up limit switch malfunction. K1 relay malfunction. DC motor controller - Fuses open or controller malfunction. DC Lift motor inoperative. Gear reducer malfunction.
