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USER MANUAL - operation
Slim Jim User manual
page 20
Adjust
Pump pressure is adjusted on the pump by regulating the amount of by-pass of the pump-outflow.
Adjust the pressure when an actual brew is at the infusion stage (the more or less stable high
pressure during a brew).
See Figure 14: First loosen the plastic locking nut, then twist the set-screw until the desired pressure
is reached and fasten the locking nut again. Check the pump pressure again after the adjustment.
Figure 14. Showing the pump with set screw to adjust the pump-pressure.
Machine cool-down
As the steam boiler is isolated, the temperature in the steam boiler will drop very slowly when heating
is turned off and the machine is otherwise untouched. It will take about 3.5 hrs to cool down to its ECO
temperature of 70°C. The coffee boiler, which is not isolated, will cool down faster and will reach ECO
temperature (50°C) after 1.5-2 hrs.
Figure 15. Graph showing typical cool-
down of the boilers when the machine is turned to “NO HEAT”
when it is at operational temperature.
If it is needed to cool down the machine quickly, turn the heating circuits to OFF and open both steam
taps until no more steam escapes from the tip. That will cool down water in the steam boiler to 100°C
but be aware that there will be some latent heat within the stainless steel of the boiler and heat
exchanger. Activate all groups continuously for a few minutes to have cold water running via the heat
exchanger towards the groups.
0
10
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0
30
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150
180
210
te
m
p
er
a
tu
re
(
°C)
time (minutes)
Typical cool down
times of Slim Jim
steamboiler
coffeeboiler
ECO coffee
ECO steam
decrease
pressure
increase
pressure
set screw
locking nut