January 2001
5A - 26
Functions - Water System
Service Manual Cafitesse 500
Flow rate controller
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The flow rate controller is installed on the
inlet side of the valve.
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It reduces the flow rate of the incoming
water to approx. 2.6 gal/min.
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This ensures that the boiler overflow can
take the amount of incoming water if the
water inlet control fails.
●
The flow rate controller limits the flow rate
with a precision of +/-10 % independent on
the water supply pressure.
●
If the dynamic pressure falls below 11.6 psi
a sufficient flow rate cannot be guaranteed.
●
In this case the water level in the boiler
cannot be controlled any more, especially
when the beverage delivery takes too long
or with frequent beverage deliveries.
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Consequences:
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Deviations in the dosing quantity
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Possible blocking of the delivery (see
'error codes')
Filter sieve
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A removable filter sieve (1) in the valve
inlet spout (in front of the flow rate
controller) prevents dust particles from
entering. (Fig. 1)
●
It is required to install an additional filter in
the supply line.
A.3.5 Function: Level Regulation
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A constant water level in the boiler is a
condition for precise water dosing by means
of the outlet valves.
●
The water level is monitored by means of the
float, float support and optical sensor. The
normally penetrating light ray is interrupted
by the float support when the float is lowered
due to a lower water level.
1
Fig. 1
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If the water level is too low the electronic
control opens the inlet valve. In this way
water is refilled.
●
The electronic control closes the inlet valve
when the required water level has been
reached. Too frequent refills are prevented
by additional water from the valve which
does not close immediately and a certain
amount of friction between the float
support and the boiler cover.
