……………………………………………… USER AND MAINTENANCE HANDBOOK L150A
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5.2.
SPECIAL MAINTENANCE OPERATIONS
INITIAL REQUIREMENTS AND SAFETY
REQUIREMENTS
All the operations of normal or special maintenance carried out on the machine, must only be undertaken by trained personnel.
Cut off the electrical power at the control panel,
Released the compressed air from the equipment, released the cooling liquid from the hydraulic circuit.
Ensure that the temperature of the heating plate is less than 40°C
5.2.1.
REPLACEMENT ELECTRICAL RESISTORS
1.
Remove the sheet guard of heating plate
2.
–Remove the lower plate frame
3.
–Remove the protection cap on electrical contacts
4.
–Remove the resistor to be replaced
5.
Cover with conductive paste the new resistor and insert in the heating plate
6.
-Restoring the electrical connection and reseal the cap on the electrical contacts
7.
–Reassemble the frame and the sheet guard.
5.2.2.
REPLACEMENT THERMOCOUPLES
1.
Remove one sheet closing lateral
2.
-Unscrew the thermocouple’s keeping head
3.
Unscrew the ring nut of the electric contact
4.
–Replace the thermocouples
5.
–Screw the ring nut
6.
–Restore the electrical contact
5.2.3.
REPLACEMENT O-RING
1.
if necessary, remove the frame where the o-ring is placed
2.
remove the o-ring
3.
clean the o-ring seat with carefulness.
4.
Place the new o-ring
5.
The point of union should be done by cutting the o-ring in an oblique with very sharp blade to avoid
smudges, see Figure
6.
Press evenly along the entire perimeter and making sure the o-ring
7.
if necessary, reassemble the frame