Sterling SDF 250 - Manual (Page 30)

SDF 250/400/500
Start up 3-16
3.5. Switching the dryer/hopper heater off
Switch off the hopper heater:
Switch off the dryer:
L
Wait until the regeneration phase is finished and the blower has
come to a standstill.
Switch off the dryer at the main switch.
Disconnect the power supply.
F
Never switch off the dryer directly at the main switch