Kees van der Westen Slim Mirage, Руководство пользователя

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Introduction
Slim Jim Idrocompresso User manual page 4
Water mains pressure
For best performance, the Idrocompresso requires that water supply pressure at the machine is
constant at a setting within the range 3.0 - 4.0 bar. Since some pressure is lost within a water
treatment system, water mains pressure should be a little higher than 3-4 bar. The optimum water
pressure will depend on the characteristics of the prepared coffee-bed and should be established
experimentally (see page
23 ).
The machine comes with a pressure reducer that will decrease higher pressure to the set value. It will
even out pressure fluctuations, provided that mains pressure is always high enough (constantly above
the set pressure). See
Figure 2 : when your water line pressure is high enough to produce over 4 bar
downstream of the water treatment system, you will not need a pump to increase water pressure. If
water pressure ever drops to below 3 bar, we advice that you install a pump. If water pressure at any
time of operation is known to fall below 2 bar, the optional pump (or other pressure increasing device)
is a must.
water
mains
> 4 bar
water
treatment
one-way
valve
pressure
reducer
3-4 bar
Slim Jim
Idro-
compresso
water
mains
< 2 bar
water
treatment
one-way
valve
required
pump
5-6 bar
pressure
reducer
3-4 bar
Slim Jim
Idro-
compresso
Figure 2. Depending on water mains pressure you may need a pump or not. With water mains
pressure in the range 2-4 bar the users should experimentally decide if the pressure at the machine is
high enough for proper pre-infusion.