SERVICE MANUAL FLOOR MODEL ELECTRIC FRYERS MODEL ML DESCRIPTION ERD40 114614 15 ½" WIDE ERD50 114615 15 ½" WIDE ERD225 114616 15 ½" WIDE ERD85 114617 21" WIDE ERC40 114618 15 ½" WIDE ERC50 114619 15 ½" WIDE ERC225 114620 15 ½" WIDE ERC85 114621 15 ½" WIDE ERO15 114622 15 ½" WIDE FLOOR SERVE STATION ERO21 114623 21" WIDE FLOOR SERVE STATION MODEL ERD40 Shown - NOTICE This Manual is prepared for the use of trained Vulcan Service Technicians and should not be used by those not
TABLE OF CONTENTS GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tools . . . . . . . . .
ELECTRIC FRYERS - GENERAL GENERAL INTRODUCTION This manual covers the following floor model fryers. All fryer models are available with the following electrical specifications: 208/60/3, 240/60/3, 480/60/3, 220/380/60/3 4 wire, 240/415/60/3 4 wire Serve station models are available in 120/60/1 if equipped with heat lamp.
ELECTRIC FRYERS - GENERAL BATTERY CONFIGURATION OPERATOR CONTROL LOCATION Batteries of up to five fryers can be configured. NOTE: 1. A filter dump station can be located under any position in a battery if it has been built without a serve station. 2. A filter dump station can be located under any position in a battery if the line-up has been built with a serve station located at either end of the battery. 3.
ELECTRIC FRYERS - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS CONTROL PANELS POTENTIOMETER (SOLID STATE MODELS) WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. THERE MAY BE TWO SEPARATE CIRCUITS. BE SURE BOTH ARE DISCONNECTED. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED. WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. THERE MAY BE TWO SEPARATE CIRCUITS. BE SURE BOTH ARE DISCONNECTED.
ELECTRIC FRYERS - REMOVAL AND REPLACEMENT OF PARTS 4. Remove bulb and capillary tube clamps and/or probe clamps from the element being replaced. Save for reuse if needed. NOTE: Half of each clamp is permanently fixed in place on the element. Center the Hi-limit bulb in its clamps before tightening clamp. The Temperature Probe should be inserted in the grommet in the head then secured with the clamps. HEATING ELEMENTS WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX.
ELECTRIC FRYERS - REMOVAL AND REPLACEMENT OF PARTS 8. Remove the screws from the rear top of the head cover. Lift cover enough to access element wires. Identify the six lead wire connections for connection later. Then disconnect the six lead wires from the element being removed. NOTE: Each heater has three elements inside and two wire connections for each element. 4. Lower the element enough to remove the screws securing the top of the head cover. 5.
ELECTRIC FRYERS - REMOVAL AND REPLACEMENT OF PARTS 6. Remove the screws that secure the high limit thermostat. 7. Remove the grommet from the element head. 8. Remove the bulb, capillary tube and the high limit thermostat from the element head. 9. Reverse procedure to install. 8. To install spring, insert hanger from top with notch pointing to rear of unit and spring hook opening pointing to front of unit. Hold in place while inserting spring from bottom. 9. Hook spring onto hanger.
ELECTRIC FRYERS - REMOVAL AND REPLACEMENT OF PARTS TILT SWITCH FILTER-READY RETURN VALVE SWITCH WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. THERE MAY BE TWO SEPARATE CIRCUITS. BE SURE BOTH ARE DISCONNECTED. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED. 1. WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. THERE MAY BE TWO SEPARATE CIRCUITS. BE SURE BOTH ARE DISCONNECTED.
ELECTRIC FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS 7. WARNING: HOT OIL AND PARTS CAN CAUSE BURNS. USE CARE WHEN SERVICING THE FRYER. WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TESTS OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST. A. B. C. D. THERMISTOR PROBE RESISTANCE CHART 8.
ELECTRIC FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS HEATING ELEMENT TEST WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. THERE MAY BE TWO SEPARATE CIRCUITS. BE SURE BOTH ARE DISCONNECTED. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED. Perform the appropriate test to obtain the desired information. NOTE: Values in the chart are nominal values (± 10%). TOTAL KW / PHASE KW X-Y X-Z Y-Z 14 4.6 4.6 4.6 17 5.6 5.6 5.
ELECTRIC FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS 13. When the shortening temperature reaches 135(F, turn the adjustment screw counterclockwise until the voltmeter reads 0 VDC. MELT TEMPERATURE CALIBRATION (SOLID STATE CONTROL) 14. Place a small drop of enamel paint or fingernail polish in the center of the screw. WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. THERE MAY BE TWO SEPARATE CIRCUITS. BE SURE BOTH ARE DISCONNECTED.
ELECTRIC FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS COMPUTER CONTROL TEST 1. Check for 24 VAC at pin 1 (and pin 2 on split vat fryer) referenced to pin 13. 2. Check for 12 to 16 VDC between pins 23 and 24. 3. Verify probe thermistor operation as outlined under “THERMISTOR PROBE RESISTANCE CHART”. 4. Check output for 24 VAC at pin 15 (and pin 16 for split vat fryer) when calling for heat. Reference to pin 13. 5.
ELECTRIC FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS BASKET LIFT ARM ADJUSTMENT 1. When basket is in the down position, it should just clear the rack which is installed above the elements. A. To adjust, pull basket arm off lift shaft and adjust height adjustment bolt to raise or lower basket arm as required. Both baskets should be same height. 2. Rollers on basket arm should touch rear of tank and be square to tank. A. To adjust, loosen basket arm set screw and adjust arm in or out as required.
ELECTRIC FRYERS - ELECTRICAL OPERATION COMPONENT LOCATION 15
ELECTRIC FRYERS - ELECTRICAL OPERATION CONTROL BOX 16
ELECTRIC FRYERS - ELECTRICAL OPERATION 8. ELECTRONIC CONTROL (SOLID STATE) FULL VAT SEQUENCE OF OPERATION 1. Conditions A. Shortening at room temperature. B. Fryer circuit breaker "on". C. Melt/Fry switch in "melt". D. Power to pin 1 of control. E. Control set 350(F 2. Power switch to "on". A. Power to pin 2 or pin 3 or pin 4 on control depending on supply voltage. B. Power is jumpered to pin 5. C.
ELECTRIC FRYERS - ELECTRICAL OPERATION 4. 5. Shortening temperature reaches set temperature. A. Computer turns off heat output and control relay R2 de-energizes. B. Power is removed from 2CON and 4CON. A. B. 8. Computer cycles heat output on temperature. Return valve switch contacts open. Control relay IPR1 unenergizes. Filter motor stops. BASKET LIFT SEQUENCE OF OPERATION If the first high limit (410(F) trips, the display will indicate “HI TEMP”.
ELECTRIC FRYERS - ELECTRICAL OPERATION Diagnostics is divided into two areas, “operation” and “service”. Operation mode is the usual mode of fryer operation. Service mode is intended to give the service person more information regarding the nature of the failure. In either mode the unit operates normally until an error occurs. In that case what is displayed will be different. The chart below shows what is displayed for both “operation” and “service” modes.
ELECTRIC FRYERS - ELECTRICAL OPERATION POWER UP DIAGNOSTICS On power up, the control will execute a self check. The failure of any of these tests will result in the message “CALL SERVICE” or “MICRO FAIL” being displayed. This prompt will flash at approximately a 1 hertz rate. While the prompt is displayed, the computer will not function. If the failure is in the computer, the fryer will operate in backup mode.
ELECTRIC FRYERS - ELECTRICAL OPERATION SCHEMATICS Full Vat With Solid State Control 21
ELECTRIC FRYERS - ELECTRICAL OPERATION Split Vat With Solid State Control 22
ELECTRIC FRYERS - ELECTRICAL OPERATION Full Vat With Computer Control 23
ELECTRIC FRYERS - ELECTRICAL OPERATION Split Vat With Computer Control 24
ELECTRIC FRYERS - ELECTRICAL OPERATION Filter Ready, Inter Plumb Options 25
ELECTRIC FRYERS - ELECTRICAL OPERATION WIRING DIAGRAM INDEX Solid State Models, Full-Vat 208 & 240 Volt 17 & 14 KW - D-422326-1 Rev. C . . . . . . . . . . . . . . . . . . . . Solid State Models, Full-Vat 208 & 240 Volt 24&21 KW - D-422324-1 Rev. C . . . . . . . . . . . . . . . . . . . . . Solid State Models, Full-Vat 220/380 240/415 Volt Filter Ready 24, 21, 17 & 14 KW - D-422332-1 Rev. C Solid State Models, Full-Vat 480 Volt 24, 21, 17 & 14 KW - D-422328-1 Rev. C . . . . . . . . . . . . . . . . . . .
ELECTRIC FRYERS - ELECTRICAL OPERATION Serve Station Units 59
ELECTRIC FRYERS - TROUBLESHOOTING TROUBLESHOOTING COMPUTER CONTROL HARNESS PIN-OUTS CHART Pin # 1 2 3 4 5 6 7 8 9 10 11 12 COMPUTER CONTROL PIN-OUTS Description Pin # Right power input 13 Left power input 14 Right pilot valve input 15 Left pilot valve input 16 Right main valve input 17 Left main valve input 18 Right high limit 19 Left high limit 20 Ignition system type input 21 Air filter input 22 Door input 23 “Full” or “Split” mode input 24 Description 24 VAC ground Right basket output Right heat outpu
