Bloomfield 8742 owner manual OPERATION continued, Water Heater, Water Flow, Automatic Operation

OPERATION (continued)

WATER HEATER

Water temperature is sensed by a thermobulb inserted into the water tank. This temperature signal is fed to the mechanical thermostat.

The temperature setpoint is adjustable. Heating element is energized by the thermostat.

Excessive temperature will trip the hi-limit safety switch. The hi-limit will automatically reset when the brewer cools.

WATER FLOW

AUTOMATIC OPERATION Fig. 4 Heat Control Diagram

606 Owners Manual for 8742-8748 Tea Brewer 76116

Pressing the BREW switch starts the timer, which in turn energizes the solenoid valve. This allows 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.

Additionally, a portion of the unheated water is bypassed into the dispenser to dilute and cool the brew. The proportion of water delivered to the brew versus the amount water diverted to dilution is controlled by a restrictor in the bypass line, and an adjustable needle valve in the brew water line.

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 timer setting.

Fig. 5 Water Flow Diagram

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