Hot Water Dispense; Brew Dispense - Bunn My Cafe AP Technical Training Manual

Dispense Systems
The My Caf é AP brewer has two dispense systems, one for hot water
dispense and brew dispense.

Hot Water Dispense

The hot water dispense system consists of:
(A) - 68 Ounce Hot Water Tank with Element
(B) - Fill Inlet Valve and check valve-not shown
(C) - Hot Water Air Pump
(D) - Vent Valve
(E) - Silicone Outlet Hot Water Tube
(F) - Refill Probe
The hot water tank is maintained by a refill circuit. The hot water but-
ton on the front is used as a push and hold function for hot water de-
livery with a maximum of 13 second hold time before shutting off the
dispense. The approximate amount of ounces delivered in a single
dispense is 10 ounces. The delivery of hot water is accomplished by
pressuring the hot water tank to push hot water through the stainless
tube that is positioned far under the water surface.
The hot water dispense path starts with water entering the inlet valve
and is regulated by an orifice located in the outlet of the fill valve.
The regulated water passes through a flow meter and travels to the
top of the tank and connects to a fill tube that is held in place with a grommet. The fill tube is approximately 6 inches
in length going into the tank. The tank will fill with water to the refill probe level and will heat to the set temperature.
When a user presses the momentary hot water button, the vent valve will close and the air pump will turn on for a
period of time to pressurize the tank to start the hot water dispense. The hot water exits out of a separate nozzle
located on the stream guide housing and into the receiving cup.
Note: Unlike the air check valve, the water check valve doesn't have an internal return spring.

Brew Dispense

The brew tank dispense system consists of:
(A) - Fill Inlet Valve and check valve-not shown
(B) - Flow Meter
(C) - 68 Ounce Water Tank
(D) - 120VDC Brew Pump
(E) - Coffee Air Pump
(F) - Sprayhead assembly
E1 - Stream Guide
E2 - Pod Holder
E3 - Sprayhead
E4 - Sprayhead Seal
E5 - Air Check Valve (Left)
Water Check Valve (Right)
E6 - Sprayhead Top
E5
E3
E2
E1
E
D
E
E6
E4
D
F
A
C
Bunn-O-Matic Corporation
E
C
B
B
A
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