NECTA SPA TECHNICAL MANUAL “BRIO 250”
Service Manual: Brio 250
Edition 02-2002
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4 - PUMPS AND BY-PASS
Note:
The pump is used in the espresso version
only:
In order to supply water to the boiler
UNDER PRESSURE the same pump used in
the entire range of H & C vending machine
is used.
The pump has overheating protection in
case of continuous or dry operation by
means of a 90° C self-reset klixon.
In order to maintain a constant brewing
pressure, it is fitted with a by-pass which is
factory set at a pressure of 12 bars; it is
also fitted with a check valve additional to
the one fitted on the pump.
The pump is activated by
relay K 14
.
Klixon protection
Check valve
12 bar by-
pass
