Bloomfield 8781A - Manual (Page 10)

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.
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.
Hot water is provided at the faucet, at supply water
pressure, any time the faucet shut-off valve is OPEN.
Fig. 5 Water Flow Diagram
8
Fig. 4 Heat Control Diagram
M62
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