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21
PROVENO E
Rev. 1.2 (24.08.2016)
Operation instructions
4. Operating instructions
4.1. Before use
4.1.1. Preparing for use
Daily check before use
• Water supply (hot/cold) is open.
• No inappropriate objects in the kettle.
• Scrapers are correctly attached to the mixing tool. See ”Positioning the mixing tool and scraper”.
• The mixing tool has been locked in its place: locking part (one end of the handle) in the groove of the
mixer axle, with the handle turned in a horizontal position. Secure fi xing by trying to lift the tool out of
the kettle by the upper blade.
Quarterly check (safety valve)
It is the responsibility of the user to check the safety block of the combi-kettle four times a year, or have
it checked by qualifi ed personnel. The Proveno combi-kettle is equipped with a four-phase safety block.
Testing the block is performed as described below. NOTE: Values in brackets concern combi-kettle ver-
sions with a max. setting temperature of 110°C.
It is not allowed to stand behind the kettle during the safety block check, because, when the check is
completed, the safety valve at the kettle’s rear section opens, blowing hot steam out of the kettle. The
test also produces a loud, whistling sound. Use hearing protectors. The kettle must always be clean and
empty.
• Switch the kettle on, set the temperature to a max. value of 120°C (110°C) and wait until the kettle
heats up to the set value and the heating stops (phase 1 tested).
• Stop the heating function by pressing
until ’On’ appears on the display.
• Press the
and buttons simultaneously and hold them down throughout the test.
• On the temperature display, ’tESt’ blinks three times, the heating is switched on again and the tem-
perature display is updated according to the temperature rise.
• When the temperature of 124°C (114°C) has been reached, the heating is interrupted for 3 seconds
and ’OFF’ appears on the temperature display.
• After a lag of 3 seconds, the heating is switched on again and the temperature display continues to
show temperature. However, letter ’a’ is displayed instead of letter ’c’ (phase 2 tested).
• Also the pressure switch starts to function at 124°C (114°C) and informs about correct functioning
by alternately blinking the red indicator lights on both sides of the ON/OFF switch (phase 3 tested).
• After the pressure switch function has been checked, the heating is forced further until the safety
valve opens. The temperature display shows then about 128°C (116°C) and the pressure gauge cor-
respondingly 1,5 bar (0,75 bar) (phase 4 tested).
In case the safety valve does not open when the pressure gauge indicates 2 bar, the buttons must be
immediately released and the combi-kettle’s mains switch turned to the OFF position. Using the kettle is
strictly forbidden. Contact qualifi ed service personnel without delay to repair the fault.
STOP
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