Bunn My Cafe AP, Техническое учебное пособие

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My Caf é AP Training Manual
14
Machine Function and Operations
Main Control Board
The main control is the brain of the brewer. The control board
is the single component that contains all of the programming
software, it interprets all the data it receives from the level and
temperature sensors and activates components to fulfill those
demands. The main control board responds to the users input
through the switch/display board and activates/controls the brew
process, pod eject process and hot water dispense.
J1 Bin Reed Switch and H2O Refill Probe
J2 Brew Tank Thermistor
J3 Heater Relay Coil and Air Vent Coil
J4 Index Sensor and Pressure Switch
J5 xxxxx
J6 Switch/Display Board
J7 Flow Meter
J8 Index Motor & Air Pump Brew Tank
J9 BR- Brew Inlet Valve Coil
HW – Hot Water Valve Coil
BST Pmp – Brew pump
J11 Not Used
J12 Air Pump Hot Water Tank (H2O)
Filling System
The fill system maintains the level of water in the brewer’s tank. Any -
time water is drawn off of the tank during a brew cycle or from the hot
water outlet, the fill circuit activates to refill the tank.
The fill system consists of:
(A) - Fill Probe
(B) - Tank
(C) - 120VAC inlet valve with outlet flow restrictor
Water enters the rear of the brewer from the supply line and first goes
through a plastic strainer mounted in the inlet valve assembly. The CBA
will activate the fill valve and allow water flow past the valve plunger
through a .8 liter flow restrictor located in the outlet of the fill valve.
The regulated water then flows through a flow meter and through the
fill tube located on top of the tank. The fill tube outlet is located ap -
proximately 5 to 6 inches under the water surface, introducing the cold
water to the bottom of the tank. The control board monitors the level of
water in the tank through a low voltage level probe mounted in the top
of the tank. When water touches the fill probe, the circuit looses its low
voltage potential to ground and the CBA will turn the output off to the
inlet valve.
SW1
PRGM
LOCK
SET
ON
J3 J1
J11
J4
J7
J12
J8
J2
J6
4 3
2 1
J5
1
2
3
4
5
1
2
3
1 2 3 4 6 5 4 3 2 1 2 1
2 1
1
2
1
3
2
4
BR
SOL
HW
SOL
BST
PMP
A
B
C