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9. Hints, Tips, and Tricks
We have already reviewed some of the ways that you can control the way the Vibiemme Domobar
espresso machines operates. The best example is the cooling flush which allows you equalize and control
the brewing temperature throughout the brewing path as well as eliminate any steam that may have built
up during an extended idling period. There are other procedures that you can use to gain further control
over the way your Vibiemme Domobar espresso machines operates.
9.1. Maximizing Steaming Power
You probably have noticed that the heating element cycles on an off while the machine is in operation
and even when it is idling. That can be seen by watching the Heating Element Activity Lamp on
the control panel. That cycling can be used to your advantage when steaming milk. For the greatest
production of steam throughout the steaming cycle, start steaming just before the heating element turns
off. You can judge this by watching the Heating Element Activity Lamp in conjunction with the
boiler pressure gauge. The goal is to begin steaming when the boiler is as hot as its range allows while
the heating element is still energized. As you draw off steam the pressure in the boiler (and thus the
temperature) will drop slightly which keeps the heating element energized. With a little practice you will
be able to do this without hardly even thinking about it.
9.2. Minimizing Temperature Variations During the Pull
A similar procedure can be used for the brew cycle. The best time to begin pulling a shot is when
the heating element has just turned off. This gives a bit more temperature stability as well because it
eliminates the variable of the heating element coming on during the pull. If the heating element comes
on during a pull you will hear the pump lose a bit of power because the heating element is drawing a large
percentage of the current available on the circuit. If the circuit that feeds electricity to your Vibiemme
Domobar espresso machines is being challenged by the demands of the machine, this procedure will
help lessen that load.
9.3. Minimizing Mineral Buildup
Mineral buildup in the boiler can be minimized by using the proper quality water and by de-scaling as mentioned
previously. Another way to lessen this scale accumulation is to pump water out of the boiler occasionally.
This is particularly important if you rarely use the hot-water function of the Vibiemme Domobar espresso
machines. To refresh the water in the boiler simply place a heat-resistant vessel under the hot water
wand and open the valve. Dispense about 220 grams and then allow the boiler to refill before proceeding.
Repeat this two or three times. Doing so every one or two weeks will help minimize scale build up.
