During the Fill Mode

Voltage is supplied to the fill valve. This causes the valve to open, allowing water to flow into the chamber.

When the water in the chamber contacts the water level sensor, the PC board stops the current flow to the fill valve. This allows the valve to close, stopping the flow of water into the chamber.

During the Heat-Up / Sterilization / Vent / Dry Modes

There is no current flow to the fill valve. The valve is closed.

During the Fill / Heat-Up / Sterilization Modes

Voltage is supplied to the vent valve. This causes the valve to close so that pressure can build in the chamber.

During the Vent Mode

The PC board stops the current flow to the vent valve. This allows the valve to open, releasing steam / pressure from the chamber.

During the Dry Mode

There is no current flow to the vent valve. The valve is open.

During the Fill Mode

Voltage is supplied to the fill valve. This causes the valve to open, allowing water to flow into the chamber.

When the water in the chamber contacts the water level sensor, the PC board stops the current flow to the fill valve. This allows the valve to close, stopping the flow of water into the chamber.

During the Heat-Up / Sterilization / Vent / Dry Modes

There is no current flow to the fill valve. The valve is closed.

During the Fill / Heat-Up / Sterilization Modes

Voltage is supplied to the vent valve. This causes the valve to close so that pressure can build in the chamber.

During the Vent Mode

The PC board stops the current flow to the vent valve. This allows the valve to open, releasing steam / pressure from the chamber.

During the Dry Mode

There is no current flow to the vent valve. The valve is open.