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5. First use of machine
For this first use of the Vibiemme Domobar, 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 measuring cup or stainless steel 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
caution whenever dispensing or disposing water.
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
Steam Wand
and the boiler pressure
should drop slightly. After a few seconds, close the
Steam Valve
. It is normal for some water to spurt out of
the
Steam Wand
when the
Steam Valve
is first opened after it 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 in the other manual that patience is a virtue when it comes to making
espresso and here is our first example. The 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 system, helping to speed things up, but plan on waiting about twenty or thirty minutes before the
machine is ready for use.
IMPORTANT:
Re-priming the DB pump
In the event of air getting drawn into the plumbing system (example: tip of silicone hose exposed to air) please
do the following:
• Fill reservoir.
• Turn both boilers on and heat to operating temperature.
• Confirm that the hose is inserted fully and properly into reservoir.
• Open the steam valve and let steam out for few seconds.
• Close steam valve.
• With your finger depress the micro switch behind the grouphead lever until pressure builds up to 12 bar,
at which point the OPV valve will start to expel water out its silicone hose and into the drip tray.
• Remove your finger from the micro switch.
• Activate the brewing lever normally.
• You pump is now re-primed.
