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.
Summary of Contents for C708
Page 1: ...Models C708 C709 C716 C717 Heat Treatment Soft Serve Freezers Service Manual 059061 S 6 15 05 ...
Page 2: ......
Page 6: ...Table of Contents Models C708 C709 C716 C717 Notes ...
Page 22: ...16 Introduction Models C708 C709 C716 C717 Notes ...
Page 49: ...43 Models C708 C709 C716 C717 Systems Controls and Operations C708 C709 Control Overview ...
Page 50: ...44 Systems Controls and Operations Models C708 C709 C716 C717 C716 C717 Control Overview ...
Page 53: ...47 Models C708 C709 C716 C717 Systems Controls and Operations Refrigeration Schematic ...
Page 70: ...64 Troubleshooting Models C708 C709 C716 C717 Notes ...
Page 73: ...67 Models C708 C709 C716 C717 Parts Notes ...
Page 74: ...68 Parts Models C708 C709 C716 C717 Model C708 Exploded View ...
Page 78: ...72 Parts Models C708 C709 C716 C717 Model C709 Exploded View ...
Page 82: ...76 Parts Models C708 C709 C716 C717 Model C716 Exploded View ...
Page 86: ...80 Parts Models C708 C709 C716 C717 Model C717 Exploded View ...
Page 133: ...C708 C709 057010 27 Rev 6 05 ...
Page 134: ...C708 C709 057010 33 Rev 6 05 ...
Page 135: ...C708 C709 057010 40 Rev 6 05 ...
Page 136: ...C708 C709 057010 58 Rev 6 05 ...
Page 137: ...Model C716 059900 27 Rev 2 06 ...
Page 138: ...Model C716 059900 27 Inset 1 2 06 ...
Page 139: ...Model C716 059900 27 Inset 2 2 06 ...
Page 140: ...Model C716 059900 33 Rev 2 06 ...
Page 141: ...Model C716 059900 40 Rev 2 06 ...
Page 142: ...Model C716 059900 58 Rev 2 06 ...
Page 143: ...Model C717 059901 27 6 05 ...
Page 144: ...Model C717 059901 27 Inset 1 6 05 ...
Page 145: ...Model C717 059901 27 Inset 2 6 05 ...
Page 146: ...Model C717 059901 33 6 05 ...
Page 147: ...Model C717 059901 40 6 05 ...
Page 148: ...Model C717 059901 58 6 05 ...