MAINTENANCE
5.9 Preventive
Maintenance
Maintenance of the furnace is divided in three sections. These are daily maintenance, monthly
maintenance and yearly maintenance.
On the next pages a list with the three sections dealing about the maintenance is
inserted:
Daily Maintenance:
Check if element is still working property (check if there is an alarm on the
display of the controller).
Check temperature stability and temperature control of each stack during
ramp up or down.
----------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------
Monthly Maintenance:
Check if the excess temperature protection is still working (check setpoints
for each zone).
Check if the tube adapters are still properly fitting.
Check the process tube.
Check if the load doors (if applicable) are still in a good condition.
Check if the o-rings are still in a good condition.
Check if the indicator light (power on) is working.
Check if there is any visible damage due to heat losses at the furnace outer
ends.
Check the flow of the cooling water through the heat exchanger.
Profile furnace minimal once a month.
Record all spike values of new profile and compare with previous values.
In case values deviate more than 5 °C under the same profile circumstances,
check voltages and thermocouples.
Check exhaust fans on proper functioning.
F
URNACE
R
EFERENCE
M
ANUAL
5-7
