Cleveland 24-CSM Supplementary Manual page 4

If the water level drops below the high probe for more than 20 seconds the WF
terminal is energized and the water fill circuit begins again.
8. When the unit is turned off, by depressing the red rocker switch,
115 VAC is removed from the heat circuit.
115 VAC is removed from the drain circuit and the normally open drain valve opens
allowing the unit to drain.
115 VAC is sent to the 3-minute timer.
The three-minute timer will energize the fill solenoid for 3 minutes while the steamer
drains.