How a Silvia Works
All wiring
Off
On, heating up
On, at temp
Brewing espresso
Steam, heating up
Steam, at temp
Pumping hot water
Overheated
Modification for PID
Dual Setpoint PID
Advanced Dual Setpoint PID

Coffee Cup
Brewing Temperature has been Achieved

Silvia is at the brew temperature. The brew thermostat's internal thermal spring has been tirggered and the contacts in the brew thermostat are now open ("off"). At this time the only thing being powered is the indicator lamp in the power switch itself. No electricity can get to the heating element, and the panel indicator lamp is off. When the temperature drops the brew thermostat will cloce (to the "on" position) and the heating element will once again be powered. This cycle repeats over and over.