Fetco CBS-61H, Руководство пользователя

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The fill system is designed to protect the heaters during both the installation and a loss of the water supply. During
initial installation, or whenever the power switch is turned on, voltage will not be supplied to the thermostat until the
tank fills and water touches the water level probe.
During operation, when water is dispensed and the water level drops below the probe, a fill signal is sent to the fill
valve. If no water is sensed by the probe after 40 seconds, the voltage to the thermostat and the heaters is
removed.
Water enters the tank through the fill tube. A hole is drilled in the upper portion of the fill tube to prevent water from
being siphoned from the tank. The fill tube extends to the bottom area of the tank. This introduces cold incoming
water directly to the heaters and away from the dispense assembly.
The water tank can be drained through a valve located inside the lower compartment of the brewer.
Temperature System:
The temperature system consists of an electronic thermostat, a temperature probe, and heating elements, and is
enabled by the liquid level control board. (See the previous section - Fill Circuit.)
When the water level probe is in contact with water, power is delivered to the thermostat through the liquid level
control board. If the temperature probe senses that the water is not hot enough, the thermostat energizes the
heating elements through the mercury relay, the water is heated, and the ready light goes off.
Once the water temperature reaches the set point, the thermostat disengages power to the heaters and the ready
light illuminates.
The thermostat is adjusted to 205
°
F
±
2
°
at the factory. (Slightly lower for high altitude installations.)
Timing System:
The timing system consist of the timer and the dispense latch assembly.
When the brew handle is rotated from the stop to the brew position, it pushes the plunger in the latch coil and
closes the micro switch, and the timer starts the timed cycle. It also starts the hot water flowing.
The timer energizes the dispense latch coil, which acts as a magnet, to hold the brew handle in the brew position. It
also lights the brew light. The coil remains energized throughout the brew cycle timed sequence.
When the timer finishes its cycle, it removes voltage from the latch coil. The latch coil then releases the brew
handle, a spring returns it to the stop position, and the flow of water stops. This return opens the micro switch,
stopping voltage from going to the timer. The brew light and the timer are disabled, and wait for the brew handle to
engage the next brew cycle.
The timer used with the 1/2 batch option has a small jumper wire on one end. A switch can replace this jumper to
open or close this connection. Opening this connection cuts the timed output in half.
Dispense System:
The dispense system is completely mechanical. It is one of the areas that makes FETCO's brewer truly unique.
(See the illustration in this section.)
When you rotate the brew lever down to brew, the end of the dispense tube is submerged in the hot water tank. It is
held in the brew position by the magnetic action of the dispense latch coil.
The brew water travels down the dispense tube to the sprayhead assembly. The rate of flow over the coffee is
controlled by the flow disc above the spray cutter. The standard hole in the flow disc is .281”. Other flow discs are
available for special situations like high levels of by-pass.
The sprayhead can be assembled incorrectly during cleaning. Refer to the cleaning label on the brewer for proper
assembly. The flow disc has the flange down, flat side up. The six triangle spray cutter has the flange up. The eight
hole spray cutter used in place of the triangle cutter goes bumps down.