Vulcan E24L User Manual

SERVICE MANUAL FOR ELECTRIC RANGES

MODELS E24L, E36L,

E48L AND E60L SERIES ML NOS. 52361 THROUGH 52372

FORM 30900

MODEL E36L SHOWN

VULCAN-HART COMPANY, P.O. BOX 696, LOUISVILLE, KY 40201- 0696, TEL. (502) 778-2791

SERVICE MANUAL FOR ELECTRIC RANGES MODELS E24L, E36L, E48L AND E60L SERIES

IMPORTANT FOR YOUR SAFETY

THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO SERVICE AND ADJUST THE EQUIPMENT COVERED BY THIS MANUAL.

INFORMATION ON THE CONSTRUCTION AND INSTALLATION OF VENTILATING HOODS MAY BE OBTAINED FROM THE "STANDARD FOR THE INSTALLATION OF EQUIPMENT FOR THE REMOVAL OF SMOKE AND GREASE LADEN VAPORS FROM COMMERCIAL COOKING EQUIPMENT," NFPA NO. 96 (LATEST EDITION) AVAILABLE FROM THE NATIONAL FIRE PROTECTION ASSOCIATION, BATTERY MARCH PARK, QUINCY MA. 02269.

FOR AND APPLIANCE EQUIPPED WITH A FLEXIBLE ELECTRIC CORD, A THREE PRONG GROUNDING PLUG IS SUPPLIED. THIS GROUNDING PLUG IS FOR YOUR PROTECTION AGAINST SHOCK HAZARD. PLUG. THE GROUNDING PLUG SHOULD BE USED WITH A PROPERLY GROUNDED THREE PRONG RECEPTACLE. IF THE APPLIANCE IS NOT EQUIPPED WITH A GROUNDING PLUG, AND ELECTRIC SUPPLY IS NEEDED, GROUND THE APPLIANCE USING THE GROUND LUG PROVIDED.

DO NOT CUT OR REMOVE THE GROUNDING PRONG OF THIS

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS/LIQUIDS IN THE VICINITY OF THIS APPLIANCE.

WARNING

IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, MODIFICATION, SERVICE OR MAINTENANCE CAN CAUSE PROPERTY DAMAGE, INJURY OR DEATH. READ ALL INSTRUCTIONS THOROUGHLY BEFORE SERVICING THIS EQUIPMENT.

TABLE OF CONTENTS

DESCRIPTION PAGE

IMPORTANT CODE, SAFETY AND WARNING INFORMATION 2 DATA PLATE, ELECTRICAL, AND APPLIANCE CLEARANCE INFORMATION 3 APPLIANCE FEATURES 3 SECTION I SERVICE CHECKS 4 - 7 SECTION II SERVICE ADJUSTMENTS 8 - 9 SECTION III REMOVAL AND REPLACEMENT OF SERVICEABLE PARTS 10 - 34 SECTION IV WIRING DIAGRAMS 35 - 39

DATA PLATE LOCATION

The appliance data plate stating model number, serial number, manufacturing date and electrical specifications is located behind the kick panel on the left side appliance front frame.

ELECTRICAL SPECIFICATIONS

Refer to Configuration/Electrical Specification Load Chart label located on the back of the lower kick panel.

CLEARANCES

All models except those equipped with the ESB Broiler require 0" clearance at both sides and rear to combustible construction. Models with the ESB Broiler require an 8" clearance at the sides and a 2" clearance at the rear to combustible construction.

FEATURES

26" wide x 22" deep x 121⁄2" high oven with 1250 watt top oven heating elements and 3750 watts bottom heating elements. Top elements are controlled by infinite switch and the bottom elements are controlled by an adjustable thermostat. The range top may have cast iron french top plates or optional hot top, griddle or high speed elements as shown in model no. chart below. The chart below shows only the basic model nos. For additional configuration refer to the Configuration/Electrical Specification Charts in the back of this manual.

E24L = 24" wide single oven range with (4) french plates or (2) high speed elements or (1) hot top in place

of (2) french plates in the vertical position. E24FL = 24" wide single oven range with a 24" Griddle top. E36L = Single oven range with (6) french top plates or (2) high speed elements or (1) hot top section in place

of (2) french plates in the vertical positions. E36FL = Single oven range with (2) french top plates and (1) 24" griddle top or (1) hot top section in place of

the (2) french plates. E36XL = Single oven range with (1) 36" griddle top. E48L = 48" wide unit with (2) oven sections and (8) french plates or (2) high speed elements or (1) hot top

in place of (2) french plates in the vertical position. E48FL = 48" wide unit with (2) ovens and a 24" griddle to the right and (4) french plates or (2) Hot tops to the

left. E60L = Double oven range with (10) french top plates or (2) high speed elements or (1) hot top section in

place of (2) french plates in the vertical positions. E60FL = Double oven range with (6) french top plates and (1) 24" griddle top or (3) hot top sections in place

of the french plates. E60XL = Double oven range with (4) french top plates and (1) 36" griddle top or (2) french top plates, (1) hot

section with (1) 36" griddle top. In all of the above the french plate sections may be replaced by high-speed elements. The above may also be equipped with an ESB Elevated Salamander Broiler. These units are indicated by the Suffix letter B in the unit model number. ESB Broilers cannot be mounted over any unit equipped with hot top sections.

SECTION I SERVICE CHECKS

WARNING: UNPLUG OVEN BEFORE SERVICING. WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR

MEASUREMENTS WHILE THE POWER IS APPLIED. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE DISCONNECT POWER, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.

THERMOSTAT CALIBRATION CHECK

If the product recipe catic for 350 degrees for 30 minutes and at the end of the cooking time with thermostat set at 350 degrees your product is consistantly under or over cooked the oven thermostat may be out of calibration and should be checked and adjusted if required. If calibration is a suspected problem perform steps 1-6 below to determine the center average heating temperature the oven and refer to Section II of the manual if thermostat calibration is required.

1. Turn oven off, allow it to cool then open the oven door.

2. Place oven rack in center oven position.

3. Place a calibrated potentiometer thermocouple in the oven cavity centered on the oven rack.

4. Turn oven on and set oven temperature to 350 degrees F.

5. Allow the oven to cycle 3 complete times.

6. After the third cycling period, record cycle at highest point, record cycle at lowest point.

Example: High point 360 degrees F. (Burner cycle off temperature)

Low point 340 degrees F. (Burner cycle on temperature)

Differential: If the differential exceeds 25 degrees F. then thermostat should be replaced. To calculate this example or any other high/low point center oven average follow the method below. Add the highest and lowest cycle values together then divide this value by 2.

Example: 360 + 340 = 700 then 700 divided by 2 = 350. The calibration set point will be

350 degrees F.

INFINITE SWITCH CHECK

1. With power on using a volt meter check for 120 Volts AC input across H1 and H2 terminals.

2. H2 has 120V AC Output, but it is not a constant output. The output will cycle on and off as long

as the input to the switch is present. The timing of this output is determined by the switch setting. By timing the switch cycles at various settings you can determine if the switch is properly working. See the chart below.

DIAL SETTING PERCENT ON TIME SECONDS ON SECONDS OFF

Hi 100 ALL 0 Med. 48 15 15 Low 37 8 14 Med. Low 28 7 24 Very Low 7 3 33

NOTE: The P terminal is a neutral leg of the switch. When the control is turned from the off position to any

other position P is making contact with L1. L1 is a neutral connection. L2 is a 120V AC input.

H1 is used as a neutral point for testing of load control output.

ON-OFF SWITCH CHECK

1. Follow steps 1-3 under the 4-Heat switch check except, using an ohmmeter check for continuity in the off

position as follows: P1 to 2 P2 to 3 P2 to 4 If the above is not proven replace the switch.

TROUBLESHOOTING

PROBLEM CORRECTIVE ACTION

Range is completely dead. Check to insure the main store power supply is on.

Check to insure the appliance is wired to power supply. Check to insure that the appliance power switch is on and that switch is not bad.

Oven section elements are dead but top surface Check for proper voltage and connections between elements are working. oven section circuit breakers and thermostat.

Check to see if the oven breaker has tripped or is defective. Check for proper connections to the terminal block and main power supply.

Top element of the oven section is dead. Check voltage of top oven element infinite switch.

Check for voltage at the top oven element terminals. Check for defective infinite switch. Check all wiring associated with the element for good connections. Check oven thermostat and wire connections.

Bottom element of oven section is dead. Check oven thermostat and wire connections.

Check for voltage at the bottom oven element terminals. Check all wiring associated with the element for good connections.

French plate or high speed element dead. Check for voltage between H1 and H2 terminals of

the french plate infinite switch in the HI position. Check for defective element or wire connections. Check voltage between the L1 and L2 terminals of the infinite switch. If you have voltage the switch is bad. If no voltage, check the supply connections to the L1 and L2 terminals.

Griddle element dead. Check for defective griddle thermostat.

Check for voltage at the griddle element terminals. Check for bad wire connections of the elements and thermostat.

Hot top section is dead. Check for defective 4-heat and on-off switches.

Check for element voltage. Check for bad wire connections of the element, 4heat and on-off switches.

Circuit breaker trips as soon as appliance Check for short circuit to ground and between lines. is turned on. With power off check for resistance between each

line and chassis ground. With power off check continuity with ohmmeter between line phases.

TROUBLESHOOTING

PROBLEM CORRECTIVE ACTION

The circuit breaker trips after the range The slow trip of a circuit breaker is an indication of as been operating for a few minutes. overload in a particular circuit. The cause of this

overload could be: Voltage problem, check element voltage against store and rating plate voltages. Element may also be defective; Measure the amps of the suspicious element and compare this with the expected value. The value is calculated by dividing the watt rating of the element (see wiring diagram) over the supply voltage. Example: For a 208V french plate the reading would

be: 2000 watt

208 volt

Check for defective breaker: Measure the amps of the suspicious breaker with all elements turned fully on. If reading is not exceeding 50 amps and the breaker trips, replace the breaker.

= 9.6 amps

SECTION II SERVICE ADJUSTMENTS

WARNING: UNPLUG OVEN BEFORE SERVICING. WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR

MEASUREMENTS WHILE POWER IS APPLIED TO THE OVEN. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE DISCONNECT POWER, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.

OVEN DOOR ADJUSTMENT

1. Lower the kick panel.

2. Pull door spring slightly out with large screwdriver. (Fig. 1)

Fig. 1

3. Using a 5⁄16" socket loosen (2) hex nuts holding the turn buckle in place. Turn the buckle "J" bolts (left and

right side) slightly retighten the nuts and test door for proper closure. Generally the door is properly adjusted when it closes on its own as you rise it to the half closed position. (Fig. 2)

Fig. 2

THERMOSTAT ADJUSTMENT

1. Perform calibration check as stated under Section I.

2. Remove the thermostat knob. (Fig 3)

Fig. 3

3. Insert a flat blade screwdriver into the thermostat dial stem until it reaches the calibration screw.

4. Note the calibrated center oven average as determined under Section 1 Calibration Check. Use that number

as the calibration set point.

5. Turn the adjustment screw to the right to increase the temperature and to the left to decrease the

temperature. A 1⁄4" turn in either direction will change the temperature by 35 degrees.

6. Perform the calibration check again and repeat the above procedure to insure that the correct center oven

average temperature has been obtained.

7. Reinstall the thermostat knob, be sure to align the knob correctly on the thermostat stem.

SECTION III REMOVAL AND REPLACEMENT OF SERVICEABLE PARTS

WARNING: UNPLUG OVEN BEFORE SERVICING. WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR

MEASUREMENTS WHILE POWER IS APPLIED TO THE OVEN. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE DISCONNECT POWER, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.

DROPPING OF CONTROL MANIFOLD COVER

1. Pull crumb tray out. (Fig. 4)

2. Remove (2) 10-24 sheet metal screws (Fig. 5)

Fig. 4

Fig. 5

3. Fold control manifold cover down and rest it on the crumb tray.

REMOVAL OF INFINITE SWITCH

1. Follow steps 1- 2 for dropping the control manifold cover.

2. Pull switch knob off of the control manifold cover. (Fig. 6)

Fig. 6

4. Remove the washer nut from the infinite switch stem. (Fig. 7)

Fig. 7

5. Lay the manifold cover down so that it rest on the crumb tray. (Fig. 8)

Fig. 8

6. Note and remove the infinite switch wire connections. (Fig. 9)

Fig. 9

7. Remove the switch from the appliance.

8. Reinstall new switch by reversing steps 1 through 6.

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