33
Models C708/C709/C716/C717
Controls, Systems and Operations
Heat Treatment Cycle
The function of the Heat Treatment Cycle is to raise
the temperature of the mix in the freezing cylinder
and hopper high enough and quickly enough to
destroy bacteria. When this has been accomplished,
the temperatures must then be returned to a
temperature low enough and quickly enough to
retard spoilage.
The Heat Treatment Cycle must be successfully
completed at least once every 24 hours or the
freezer will automatically lock itself in the STANDBY
mode.
The Heat Treatment Cycle may be started
automatically according to the AUTO HEAT CYCLE
TIME.
IMPORTANT: The freezer must be operating
in either the STANDBY or AUTO mode before a
Heat Treatment Cycle can be started.
There are three phases in a Heat Treatment Cycle:
Heat, Hold and Cool
The Heat Phase
During this phase, the temperatures of the product
in the freezing cylinder and hopper are raised over
150_F(65_C) in 90 minutes or less.
The Heat Phase Timer “times out” the maximum
allowable amount of time the unit can remain in the
HEAT phase of the Heat Treatment Cycle. If the
timer exceeds 90 minutes, the unit will lock-out.
The Hold Phase
During the HOLD phase, the temperature of the
product is “held” over 150_F(65_C) for a minimum
of 35 minutes to ensure the destruction of all harmful
bacteria in the product.
The Hold Phase Timer “times out” after 35 minutes
as long as all freezing cylinder and hopper
temperatures remain above 150_F(65_C) for the
duration of the HOLD phase.
The Cool Phase
During the COOL phase, the product in the freezing
cylinder and the hopper are lowered to 41_F(5_C)
or less. The unit must complete this phase in less
than 90 minutes.
The COOL Phase Timer measures the maximum
allowable time the unit can remain in the COOL
phase. If the timer exceeds 90 minutes, the unit will
lock-out.
The Heat Cycle TT (Total Time) Timer “times out”
the maximum allowable time the unit can remain in
the Heat Treatment Cycle (4 hours). If the timer
exceeds four hours, the unit will lock out. This timer
is a combination of the HEAT, HOLD, and COOL
Phase Times.
When the entire Heat Treatment Cycle has been
completed, the normal display will appear, indicating
that the machine is operating in the STANDBY
mode.
To Next Page
Loading...
