OPERATION (continued)
WATER HEATER
Water temperature is sensed by an electronic water temperature probe inserted into the water tank. This temperature signal is fed to the controller.
The setpoint temperature is adjustable. The controller sends a command signal to the power board based upon a comparison between the setpoint temperature and actual temperature. See page 15.
The power board energizes the heating elements based on the command signal from the controller.
Excessive temperature will trip the
WATER FLOW
POUR-OVER FEATURE
Fig. 5 Heat Control Diagram
75908 Owners Manual E.B.C. Dual Airpot/Thermal Brewer
Pouring any amount of water into the
AUTOMATIC OPERATION
Pressing the BREW key energizes the solenoid valve, allowing water from an external water supply to flow into the water tank. The incoming water forces heated water out of the tank to perform the brew.
The solenoid uses a flow control device so that flow is consistent between 20 p.s.i. and 90 p.s.i.
The length of time the solenoid is open is controlled by the time setting of the controller. See page 18.
After the solenoid closes, water will continue to flow to the brew chamber until
the water level in the tank falls below the brew pickup, breaking the siphon.
HOT WATER FAUCET
The faucet water coil is submerged in the hot water tank and draws heat from the brew water. Water going to the water coil is not controlled by the solenoid valve.
Hot water is provided at the faucet, at supply water pressure, any time the faucet
OPEN.
645
Fig. 6 Water Flow Diagram
7