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Water for brewing is contained in a 200 ounce stainless steel tank. This tank contains a
1680W @ 120VAC heating element that is powered by the line voltage into the machine.
The heating element is controlled by the control board through a mechanical relay. The
dual voltage ITCB brewer adds an additional 1800W for 208/240VAC heating element;
the two elements are wired in series.
The control board monitors the water in the tank by a temperature sensor that is in
contact with the water. This temperature sensor is a digital thermistor; the control board
reads the temperature as value of resistance. The temperature sensor allows the control
board to trigger the heating element triac when the temperature drops below its pro-
grammed value and shut down the trigger voltage when the water temperature reaches
the programmed holding value.
Dispensing System
The dispensing system consists of:
•
Dispense valve
•
Sprayhead
•
Funnel
The ITCB brewer is a gravity dump brewing system. During the brew cycle the
dispense valve will open allowing water to flow from the tank to the sprayhead.
The dispense solenoid is 120VAC valve. The sprayhead not only serves to dif-
fuse the water over the product but also serves as the outlet flow control.
For coffee brewing the ITCB can be programmed with pulse brew routines.
The control board will open and close the dispense valve multiple times during
the brew cycle.
Because the ITCB can brew both coffee and tea it can accept multiple funnels.
For tea brewing the funnel will have a small outlet restrictor to facilitate the
water have a longer contact time with the tea (steeping) and a strainer screen
to prevent tea leaves from following to the server. For coffee brewing the ITCB
can accept a standard coffee funnel or a Smart funnel.
Dilution System
The dilution system consists of:
•
Dilution valve
•
Flow regulator
•
Dilution nozzle
The ITCB features quick brew by default, but a delay can be programmed. The brewer will dump water directly
into the tea server to dilute the tea concentrate during the tea brew cycle. The dilution solenoid is a 120VAC valve
mounted onto the same body as the inlet solenoid. During a tea brew cycle, the dilution solenoid will open; water will
flow through a .50GPM flow control washer and out of the dilution nozzle.
Temperature sensor
High limit thermostat
Heating element
Dispense valve
Dispense tube
Sprayhead
strainer screen
outlet restrictor
Tea funnel
Smartfunnel
Bunn-O-Matic Corporation
S
15
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