Operation
Slim Jim Idrocompresso User manual
page 22
Why switch to ECO …
1. A not-used machine kept at ECO consumes about 20% of the energy of a not-used machine kept
at operational temperature.
Heat loss of the machine is related to the square of the temperature difference between the machine
and its environment. Of course some extra energy is needed to heat up from ECO to operational
temperature. Switching to ECO will therefore lead to 70-75% energy reduction, depending on how
long the machine will be at ECO before turning ON again.
… and not to OFF?
2. A lot of parts in the machine suffer from large temperature variations, not cooling down to room
temperature decreases the variation and thus the amount the machine suffers.
3. Heating up from ECO (just over 8 minutes) is faster than heating up from room temperature (about
15 minutes).
Figure 18. Graph showing typical heat-up duration normalised at ECO-temperatures. From ECO to
operational temperatures takes just over 8 minutes for both coffee and steam. From 20°C to
operational takes 14 (coffee) and 16 (steam) minutes resp.. Also shown is heat-up with high power
heating element for steam boiler.
Note!
The temperature sensor of the steam-boiler is placed above the water-level for quick response to
steam withdrawal. At temperatures below 110 °C (230 °F) steam density is low and the sensor will not
register a change in (water) temperature quickly. For that reason, the steam-boiler temperature may
be up to 6 °C higher than the ECO-setpoint at the moment you switch from ECO to operational mode.
0
10
20
30
40
50
60
70
80
90
100
110
120
130
-8
-6
-4
-2
0
2
4
6
8
10
te
m
p
er
a
tu
re
(
°C)
time (minutes)
Typical heat up
times of Slim Jim
steam 6.0kW
steam 4.8kW
coffee
