Henny Penny OFE-321 Manuale operativo

Model OFE-321,322

SECTION 2. MAINTENANCE

2-1. INTRODUCTION This section provides procedures for the checkout and replacement

of the various parts used within the fryer. Before replacing any

parts, refer to the Troubleshooting Section. It will aid you in

determining the cause of the malfunction.

2-2. MAINTENANCE HINTS 1. You may need to use a multimeter to check the electric

components.

2. When the manual refers to the circuit being closed, the

multimeter should read zero unless otherwise noted.

3. When the manual refers to the circuit being open, the

multimeter will read infinity.

2-3. COMPLETE CONTROL

PANEL REPLACEMENT Should the control board become inoperative, follow these

instructions for replacing the board.

1. Remove electrical power supplied to the unit.

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle.

2. Remove the four screws securing the control panel and lift

out.

3. Unplug the wire connectors going to the control board.

4. Install new control panel in reverse order.

When plugging connectors onto new control panel, be sure

the connectors are inserted onto all of the pins, and that the

connectors are not forced onto the pins backwards. If not

connected properly, damage to the board could result.

2-1 405

Model OFE-321,322

2-4. POWER SWITCH 1. Remove electrical power supplied to fryer.

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle.

2. Remove control panel.

3. Label and remove the wires from the switch. With test

instrument, check across the terminals of the switch with

the switch in the ON position, then in the OFF position.

With the switch in the ON position, the circuit should be

closed. With the switch in the OFF position, the circuit

should be open. If the switch checks defective, replace by

continuing with this procedure.

4. With control panel removed, and the wires off the switch, push

in on tabs on the switch to remove from panel.

5. Replace with new switch, and reconnect wires to switch.

6. Replace the control panel.

2-5. TRANSFORMER The transformer reduces voltage down to accommodate those

components with low voltage.

1. Remove electrical power supplied to the unit.

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle.

2. Remove the control panel as discussed in Complete Control Panel

Replacement Section.

3. Squeeze on the wire connector at the I/O board assembly to

disconnect the wires from the transformer.

4. Using a Phillips head screwdriver, remove the two screws

securing the transformer to the shroud.

5. Install the new transformer in reverse order.

405 2-2

Model OFE-321,322

2-6. I/O POWER SUPPLY

BOARD ASSEMBLY The input/output power supply board assembly distributes

voltage to the various components in the fryer. The board also

receives information from components in the fryer.

1. Remove electrical power supplied to the unit.

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle.

2. Remove the control panel as discussed in Complete Control

Panel Replacement Section.

3. Disconnect the wire assemblies from the board.

4. Using a nut driver or wrench, remove the four keps nuts

securing the board to the shroud.

5. Install the new I/O board assembly in reverse order.

2-7. DRAIN MICROSWITCH Upon turning the drain handle, the drain microswitch circuit

should open, cutting off the pilot flame. This will prevent the fryer

from heating while shortening is being drained from the frypot.

1. Remove electrical power supplied to the unit.

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle.

2-3 405

Model OFE-321,322

2-7. DRAIN MICROSWITCH

(Continued) 2. The following check should be made to determine if the drain

microswitch is defective.

a. Remove the two screws securing the microswitch to the

drain rod valve bracket.

b. Remove wires from the switch.

c. Check for continuity across the two outside terminals of the

drain switch. If the circuit is open, the drain switch is

defective. The circuit should only be opened by pressing on

the actuator of the drain switch.

3. Replace switch in reverse order.

2-8. FILTER SWITCH

1. Remove electrical power supplied to the unit.

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle.

2. Remove the control panel above the switch.

3. Label and remove the wires from the switch. With test

instrument, check across the terminals of the switch with the

switch in the ON position, and then in the OFF position. With

the switch in the ON position, the circuit should be closed.

With the switch in the OFF position, the circuit should be open.

If the switch checks defective, replace it by continuing with

this procedure.

4. With wires removed from the switch, push in on tabs on the

switch and remove switch from the panel.

5. Push new switch into panel and reconnect wires.

405 2-4

Model OFE-321,322

2-9. HEATING ELEMENTS

Heating elements are available for 208, 480 and 230 volts. Check

data plate to determine correct voltage.

Checkout:

If the shortenings temperature recovery is very slow or at a slower

rate than required, this may indicate defective heating element(s).

An ohmmeter will quickly indicate if the elements are shorted or

open.

1. Remove electrical power supplied to the frypot to be worked on.

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle, to the frypot

to be worked on. Be aware the other controls will have

power.

2. Remove control panel.

3. Perform an ohm check on one element at a time, with wires

disconnected from element. If the resistance is not within

tolerance, replace the element.

Voltage Wattage Resistance Ohms (cold)

208 7333 5.6

240 7333 6.9

480 7333 27.5

Replacement:

Refer to figure 2-2.

1. Drain the shortening from the frypot.

2. Remove the high limit bulb holder from the heating element

inside the frypot.

2-5 405

Model OFE-321,322

2-9. HEATING ELEMENTS

(Continued) 3. Remove the heating element wires from the terminals by

removing the nuts and washers. Label each so it can be

replaced on the new element in the same position.

4. Remove the bolts from the five element spreaders. The

element spreaders will now pull off the elements.

5. Remove the brass nuts and washers which secure the ends of

the elements through the frypot wall.

6. Remove the heating elements from the frypot as a group by

lifting the far end and sliding them up and out toward the

rear of the frypot.

Always install new rubber O-rings when installing heater

elements.

7. Install new heating elements with the new O-rings, terminal

end first at approximately a 45°angle, slipping the terminals

through the front wall of the frypot.

8. Replace the brass nuts and washers on the element terminals.

Tighten the brass nuts to 30 foot lbs. of torque.

9. Evenly space the element spreaders on the sides of the

elements and reinstall bolts. Place the fifth spreader in the

front of the elements as to protect the temperature probe.

(Fig.2-1

10. Replace the high limit bulb holder on the top element, and

position the bulb between the top and second element

midway from side to side, and tighten screw that holds the

bulb in place.

11. Reconnect the wires to the appropriate terminal as labeled

when they were removed.

Temperature Spreader

Probe

Fig. 2-1 12. Replace the front control panel.

405 2-6

Model OFE-321,322

2-9. HEATING ELEMENTS

(Continued) 13. Connect the power cord to the wall receptacle or close wall

circuit breaker.

Heating elements should never be energized without

shortening in the frypot, or damage to the elements could

result.

14. Replace the shortening in the frypot.

Fig. 2-2

2-7 405

Model OFE-321,322

2-10. HEATING

CONTACTORS

Each well of an electric fryer requires two switching contactors.

The first in line is the primary contactor and the second in line is

the heat contactor. When open, the primary contactor does not

allow power to flow to the heat contactor. When closed, the

primary supplies voltage to the heat contactor. When the heat

contactor is open, no voltage is supplied to the heating elements.

When the heat contactor closes, voltage is supplied to the heating

elements.

Checkout (Power Removed)

1. Remove electrical power supplied to the frypot to be worked on.

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle, to the frypot

to be worked on. Be aware the other controls will have

power.

2. Remove the control panel.

30 31 32 3. Perform a check on the contactor as follows:

Test Points Results

From 30 to 34 open circuit

From 31 to 35 open circuit

From 32 to 36 open circuit

From 33 to 37 ohm reading 1700

Wires should be removed and labeled to obtain an accurate check

of contactors.

34 35 36

Mercury Contactor

405 2-8

Model OFE-321,322

2-10. HEATING Checkout (Power Supplied)

CONTACTORS

(Continued)

To avoid electrical shock, make connections before

applying power, take reading, and remove power before

removing meter leads. The following checks are

performed with the wall circuit breaker closed and the

main power switch in the ON position.

1. Re-apply power to unit and turn POWER switch ON.

2. Using illustrations from previous page, check voltage as

follows:

TestPoints Results

From terminal 34 to 35 The voltage should read

From terminal 35 to 36 the same at each terminal

From terminal 34 to 36

Replacement:

If either contactor is defective it must be replaced as follows:

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle, to the frypot

to be worked on. Be aware the other controls will have

power.

1. Remove only the wires directly connected to the contactor being

replaced. Label the wires for replacement.

2. Loosen the screws securing the contactor bracket to the shroud.

3. Remove the contactor from the bracket.

4. Reinstall in reverse order.

2-9 405

Model OFE-321,322

2-11. SPEAKER ASSEMBLY

The speaker assembly emits audible signals to let the operator

know when cooking and hold times are finished.

1. Remove electrical power supplied to unit.

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle.

2. Remove control panel.

3. Follow the speaker wire and disconnect from control board.

4. Remove the screws securing the speaker bracket to the shroud.

5. Remove the speaker from the bracket.

6. Reinstall in reverse order.

2-12. HIGH TEMPERATURE

LIMIT CONTROL The electric units, model OFE-321/2/3/4, use the same high

temperature control limits as the gas units, OFG-321/2/3/4, but

the mounting of the capillary tube is different on the electric

units compared to the gas units.

Checkout:

Use the same procedure as in the High Limit Temperature Control

(Gas) Section.

Replacement:

To avoid electrical shock or property damage, move the

POWER switch to OFF and disconnect main circuit

breaker, or unplug cord at wall receptacle, to the frypot

to be worked on. Be aware the other controls will have

power.

405 2-10

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