Randell BC-3 Operator's Manual - page 8
8
OPERATION FOR CONTROL
There are three modes of operation for the blast chiller.
Idle, Automatic, and Manual. When a cycle is running
(start has been pushed), the selected modes’ LED will
flash.
The following explains how to use each mode:
Idle mode - When the control is first turned on, it will Pre-
chill the cabinet down to 38
°F and begin to cycle the
compressor. In this mode the “auto” led will be lit and the
display will show probe temperature. If there are no food
probes present, the “air” led will be lit and unit will cycle
on the air temperature. The cooling fans will run continu-
ously to maintain uniform cabinet temperature.
Auto mode - The chiller is designed to operate automati-
cally with one or more food probes placed in the product
pans. With the control turned on, as soon as any probe
exceeds 40
°F the chiller will begin to cool to get the
probe down to 38
°F. This will automatically happen,
without pushing any buttons; however, to properly
control the chill temperature, to log time and temperature
information, and to have an alarm sound at the end of
the chill, the “start” button must be pushed. When the
start button is pushed, the “auto” led will start to flash
indicating that chill cycle is in process. The chiller will
automatically maximize the efficiency of the chill cycle
according to the air temperature set point. During the
chill cycle, the individual probes can be viewed tempo-
rarily by using the “SEL” select button; the green led’s will indicate
which probe is being viewed. Near the end of the chill cycle, the
green led’s become “safe” indicators. They light up as each food
probe reaches 40
°F, the chill cycle will continue until all probes reach
the 38
°F set point.
Hold mode - At the end of the chill cycle an alarm will sound and the
“hold” led will light up to indicate that the chill cycle is complete. The
chiller will begin holding 38
°F food based on the warmest food probe.
The display will change to a timer, counting up the minutes and hours
since the chill cycle ended. The control and printer will continue to log
time and temperature information until stopped. To stop the logging
and the timer, and return to temperature display, press the “stop”
button.
Hint - Some freezing of food on the sides of the pans is normal.
However, if freezing of food is a problem, there are several things that
can be done to help.
1. Locate the food probes closer to the sides of the pans where
freezing is more likely to occur. If this is done, keep in mind that the
center of the food may actually be warmer than indicated.
2. If one pan is freezing before another pan is “safe”, this may be due
to a slow loading process or loading at different times within a chill
cycle. Always try to fully load the unit all at once.