The inlet pressure from the gas cylinder is displayed on the pressure gauge
for the inlet pressure (Fig. 3), and, depending on filling pressure, can
amount up to 250 bar for a full bottle. The inlet pressure decreases with
consumption of the gas, and is accordingly an indicator for the bottle
running out. When the bottle is empty, the pressure gauge will show "0".
Keep checking the inlet pressure gauge at regular intervals, so that you
can order a new bottle of nitrogen or argon in time.
The discharge pressure (Fig. 5) is at the same time the
operating pressure
of your dispensing system. It determines the
flow rate of the wine
,
and in conjunction with the programmed time, also the
dispensed volume
.
The ideal operating pressure lies between 0.25 and a maximum of 0.4 bar.
Within this range, a low pressure results in a quiet, slow flow rate,
and correspondingly in longer dispensing times. Higher pressures
within the specified range lead to a faster flow of wine, leading to
formation of bubbles in the glass in the short term, which may be
perceived negatively by some people.
The setting of a lower pressure than 0.25 bar is possible, and leads
accordingly to very slow flow rates. Higher pressures than 0.4 bar should be
avoided. They could cause damage to the internal lines.
When setting up the system, choose the optimal flow rate; if necessary,
by testing with different operating pressures, and don't change it
anymore, because a subsequent pressure change would require the
reprogramming of all the dispensation
volumes
(see Para. 1
1
).
Usually, at the installation of your system, the
technician
will preset
the operating pressure and calibrate the respective dispensing
amounts on this basis. However, you can also make these settings
yourself:
•
In order to adjust the dispensing (operating) pressure, loosen the
locknut
on the adjusting screw of the precision pressure regulator (7).
•
Turn the screw clockwise for a higher pressure and counter-
clockwise in
order to reduce it.
•
Note that the pressure gauge reacts immediately only to
pressure
increases. In order for the display to show a reduction of
pressure, you first
need to release the pressure from the system
by pressing one of the
dispensing buttons. You might possibly
have to remove an already
connected wine bottle from its
position.
•
Finally, secure your chosen pressure by re-tightening the locknut.
8
11. Adjusting and Regulating the Gas Pressure
Fig. 5 Pressure
gauge with
scale for the
dispensing
(operating)
pressure
(0.25-0.4 bar)
The other
number item
references on
this page refer
to Page
6
, Fig. 2.
.
Fig. 3 Pressure
gauge with
scale for inlet
pressure
Fig. 4 Pressure
gauge with scale
for the transition
pressure (max.
1.5 bar)
*
*) See Para. 15 ff.
for explanations
on card
technology.
