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 setpoint temperature 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.

Fig. 4

Heat Control Diagram

WATER FLOW

AUTOMATIC OPERATION

 

 

 

 

In COFFEE mode, pressing the BREW switch

 

 

causes the timer to energize the coffee brew

 

 

solenoid valve. This allows water from an external

 

 

water supply to flow into the water tank.

 

 

In TEA mode, pressing the BREW switch causes

 

 

the timer to energize the tea brew solenoid valve.

 

 

This allows water from an external water supply to

 

 

flow into the water tank. Additionally, the tea bypass

 

 

solenoid is energized, sending cold dilution water

 

 

from an external source to the dispenser.

 

 

Water flowing into the tank forces a like amount of

 

 

heated water out of the tank to perform the brew.

 

 

POUR-OVER OPTION

 

 

If an external water source is unavailable, one

 

 

decanter of cold water may be poured into the

 

 

pour-over opening to brew coffee. Pour-over is not

 

 

recommended for brewing tea.

 

 

AUTOMATIC OPERATION TIMER

 

 

The length of time a brew or bypass solenoid is open

 

 

is controlled by the timer. The timer signal is routed

 

 

to either the coffee brew solenoid, or to the tea brew

 

 

and bypass solenoids, according to the position of

 

 

the mode switch.

 

 

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 either

 

 

brew solenoid valve.

Fig. 5 Water Flow Diagram

Hot water is provided at the faucet, at supply water

pressure, any time the faucet shut-off valve is OPEN.

 

 

 

 

8

M628 76201 Owners Manual 8781A Tea Brewer

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Bloomfield 8781A owner manual POUR-OVER Option, Automatic Operation Timer, HOT Water Faucet