APW HSO-200 manual Automatic Safety & Control Devices of Oven, Replacement of Spare Parts

AUTOMATIC SAFETY & CONTROL DEVICES OF OVEN

PROTECTION OF THE AUXILIARY ELECTRICAL CIRCUIT

It is checked by the fuses positioned on a terminal block at the line entry.

PROTECTION OF THE CHAMBER FAN

A remote switch stops the fan motor in the event of a malfunction or overload. It is located behind the oven and must be reset manually. When it cuts in, it stops the motor and shuts off the heating elements.

OVEN CHAMBER SAFETY THERMOSTAT

The safety thermostat disconnects the heating elements if the temperature in the oven chamber is too high (644°F). It must be reset manually. If it activates, technical service must be notified. All components are protected by the following type of fuse: CLASS CC,G 600V 20A.

REPLACEMENT OF SPARE PARTS

Replacement of spare parts must be performed exclusively by qualified and AUTHORIZED personnel. Turn the main switch OFF and unplug the convection oven before carrying out any spare parts replacement.

REPLACEMENT OF MOTORS: It is necessary to remove the back by removing the 4 fastening screws “A” and the 4 screws “B” that support them (fig.8).

OUTER COVERING: Remove the 4 rear fastening screws “C” (fig.9).

BULB, HEATING ELEMENT AND MOTOR FAN: It is necessary to access the inside of the oven, first removing pans, racks and related supports, and then the conveyor.

30W MOTOR: Remove the fan by following the procedure outlined above, disconnect the motor from the electrical system, loosen the 4 screws and replace the motor. Before re-installing the fan, check that there is no friction between the motor shaft and the ring nut located inside the oven. If there is, loosen the fixing screws of the ring nut and re-tighten them after eliminating the friction and having centered the ring nut on the motor shaft.

HEATING ELEMENTS: Disconnect the heating element connections outside the oven chamber. Loosen the heating elements from inside the oven chamber and replace them.

ELECTRO-MECHANICAL CONTROLS: All the electric components are visible. To replace them it is necessary to disconnect the attachments, remove the knobs, unscrew the fastening screws or nuts and replace them. Attention: For theadjustable thermostat, safety thermostat and thermometer, unscrew the guard and the supports and remove the bulbs. Once they have been replaced use high-temperature resistant silicone to seal the holes. After replacement, reseal the holes for the passage of the capillaries with high temperature silicone.

CHAMBER FACE GASKET: It is simply pressed in. Pull to remove it. NB: Before removing it, note its position carefully so as to place the new one in the same position.

REPLACEMENT OF CHAMBER LIGHT AND GLASS GASKET: Check and replace the glass gasket and any lights in the oven chamber (fig.10).

Figure 7

Figure 8

1 2

A B

Figure 9

C

Figure 10

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