9
5. To modify a parameter push the SET key and use the arrow keys.
6. Confirm the new value by pushing the SET key.
7. The new value is recorded even if the programming is exited by time out.
TO exit:
wait 30s or push the SET+UP keys.
10. HOW A CYCLE IS DONE
1. Every programmable cycle Cy1, Cy2, Cy3 or Cy4 can be divided into up to 3 phases usually called:
•
hard chill
•
soft chill
•
freezing cycle
2. For each phase there are 3 parameters.
iS1, (iS 2, iS 3):
Set point related to the insert probes that stops the current phase.
rS1, (rS2, rS3):
set point of the room temperature for each phase.
Pd1, (Pd2, Pd3):
the maximum duration time for each phase.
Hds :
set point of the hold phase at the end of the whole cycle.
HOW TO USE THE INSERT PROBES.
By means the insert probe, the internal temperature of products can be checked. This measure is used to end
the various phase of the cycle. A special internal function detect if the inset probe is not used, in this case the
cycle is made by time
EXAMPLE OF A BLAST CHILLER CYCLE.
The following drawing explains how a Blast Chiller
cycle can be done
.
First phase: “Hard chill”.
It is normally used to fast chill hot foods. E.g. from
80°C / 170°F to 20°C / 70°F.
During “
Hard Chill
”, both compressor and fan are
always on until the
rS1
temperature is reached. At
this point compressor is turned on end off so as to
keep the temperature of the room at the
rS1
value.
“Hard Chill” ends when the temperature measured
by the 3 insert probes reach the
iS1
value.
Second phase: “Soft chill”.
The
Soft Chill
starts when the Hard Chill ends. It is used to prevent thin layer of ice from forming on the product.
The Soft Chill lasts until the temperature measured by the 3 insert probes reach the set point
iS2
(usually 4 or
5°C).
During Soft Chill the temperature of the room is regulated by the ambient probe with the set point
rS2
(normally
at 0 or 1 °C / 32 or 34°F). When the box temperature reaches the
rS2
value compressor is
turned on end off so
as to keep the temperature of the box at this value.
Third phase: “Freezing cycle”.
Freezing Cycle: used to fast freeze foods.
