Bunn Dual TF BrewWISE DBC Instrukcja Naprawy Pobierz pdf (Strona 15)

Bunn-O-Matic Corporation

Machine Function and Operations

Main Control Board

The main control board is the brain of the brewer. In the Digital

Brewer Control (DBC

) system, the control board is the single com-

ponent that contains all of the programming software, it interprets

all the data it receives from the level and temperature sensors and

activatescomponentstofulllthosedemands.Themaincontrol

board responds to the users input through the membrane switch and

activates and controls the brew cycle. The control board can receive

data from Smart Funnels

through the sensing coils on the front of

the machine.

The control board is interchangeable between the single and dual

brewers. There is jumper located on the board to select either single

or dual with dual being default.

In a digital brewer the control board takes the place of the

liquid level control board, the timer board, and the mechan- i-

cal thermostat. All of these components are combined into a single

unit.

Filling System

Thellsystemmaintainsthelevelofwaterinthebrewer’stank.Anytimewaterisdrawnoffofthetankduringabrew

cycle,thellcircuitactivatestorellthetank.

Thellsystemconsistsof:

• 120VAC solenoid inlet valve

• Fill probe

• Overowcup

Water enters the brewer through the water supply line and enters the

chassis through copper tubing.Thewaterowsthroughtheinletsolenoid.

The inlet solenoid contains a strainer that restricts large particles from

passing through. Once water passes through the inlet solenoid, water

beginsllingthetank.

The 120VAC inlet solenoid is activated by the control board anytime the

brewercallsforwater.Thevalveopensandallowswatertoow,under

line pressure, to the top of the tank where the silicon tube connects to an

stainlesssteellltube.Thelltuberunstothebottomofthetankwhere

the incoming water enters the tank.

The control board monitors the level of water in the tank through a low

voltage level probe mounted to the top of the tank. The control board

grounds a 2.5VAC signal to the tank through the water. If it loses this

signal, the control board will activate the inlet valve.

Thebrewerfeaturesanoverowsafetysystemforthellcircuit.Thereis

atubemountedonthetopofthetankthatwilldrainwaterifthetanklls

tothetopandcontinuestoll.Thewaterwilldrainintotheoverowcup;

thereisaoatswitchinthecup.Whenthisswitchoatstoitstopposi-

tionthissignalsthecontrolboardtodeactivatethellcircuitandheating

circuit.

Main Control Board

Check Valve

(Optional)

Inlet Solenoid

Liquid Level Probe

Float Switch

Overow

Cup

Fill Tube

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 30 31

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