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You will know that the boiler is filled to the proper level because the pump
will stop operating. When the pump stops, turn the power switch to Position II
as shown here. This position allows the autofill to continue working and adds
heating element function. If you ever wonder why the machine is brewing
with cold water, check to be sure that the power switch is in Position 2!
As the machine begins to warm up you may notice that there is a slight
hissing sound coming from inside the machine. This is normal. It is the anti-
vacuum valve. This valve opens as the machine cooled off the last time it was
used to allow air to be drawn into the boiler to prevent a high vacuum being
formed which can damage the machine. When the machine starts up it takes a
little pressure to close this valve, and until it closes completely it may hiss slightly.
Wait about five minutes for the boiler to gain some heat. You should notice that the boiler pressure gauge
is indicating that pressure is rising, and when it gets into its operating range you will and you will hear the
pressurestat clicking on and off as it cycles in response to the boiler pressure.
CAUTION: While the boiler is coming up to pressure for the first time you should stay close by to
monitor its progress to be sure that all is as it should be.
WARNING: The grouphead and other external parts will get hot enough to cause burns. Use caution
when using the machine and if there are any small children in the home (or adults not accustomed to such
appliances) make sure that they are aware of the dangers. Shiny chrome surfaces invite curious hands!
For this first use of the Vibiemme Domobar Super, once the pressure is above about 0.5 you should flush the
boiler to be sure that the machine is working properly. Place a suitable container (like a heat-resistant glass mea-
suring cup or stainless steaming pitcher) under the hot water spout and carefully open the hot water valve. Water
should pour out and the pump should start. Pump out about 6 ounces and then close the hot water valve. Repeat
this two or three times over the next five or ten minutes, and then check the reservoir level.
WARNING: The water dispensed as described above is hot enough to cause serious burns. Use cau-
tion whenever dispensing or disposing of water from the Domobar Super.
After an additional five or ten minutes of warm-up time, test the steam function. Place a vessel under the
steam wand and slowly open the steam valve. Steam should come from the wand and the boiler pressure should
drop slightly. After a few seconds close the valve. It is normal for some water to be pushed out of the wand with
some force when the valve is first opened after the steam valve has been closed for some time.
WARNING: Steam can easily cause deep and nasty burns. The metal steam wand gets very hot.
Always move the steam wand by holding the rubber sleeve and take great care whenever using the steam
function.
When using the steam wand the pump may occasionally operate on its own. The steam comes off the top of
the main boiler where it is “stored” all the time, and the pump will only run when the water level drops to a point
determined by the depth of the water-level sensing wire.
Now it’s time to wait! We mentioned earlier that patience is a virtue when it comes to making espresso and
here is our first example. The large boiler, that huge brass grouphead, the portafilter, and all the related metal
parts need to come up to temperature. As the boiler comes up to temperature, hot water will circulate through the
grouphead helping to speed things up, but plan on waiting about twenty or thirty minutes before the machine is
ready for use.
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