Sterling SDF 250 User Manual
Page 41
SDF 250/400/500
Maintenance 5-4
5.2. Cleaning or Replacing the Air Filter
Switch off the hopper heater:
And the dryer:
L
Wait until the regeneration phase is finished
and the blower has come to a standstill.
Switch off the main switch of the dryer.
Interrupt the mains supply so that the device cannot be switched
on unintentionally.
If there is a return air cooler installed, switch off its coolant
circuit.
Switch off the drying hopper:
&
Clogged filters substantially reduce the amount of circulating air
and lead to a production lag of your dryer. Clogged filters may
also damage the heating elements.
Purchase order numbers return air filter
when operating without return air cooler:
ID 86378
when operating with return air cooler:
ID 88226
Purchase order number regeneration air filter: ID 98171