17
Models C706 & C707
Controls
Viscosity Function:
In soft serve freezers the logic board monitors amp
draw on the beater motor, which is directly related to
the viscosity of the product in the freezing cylinder.
When the amp draw reaches its set point, the unit
cycles off. Therefore, the viscosity of the product will
always be consistent even through its temperature
may vary slightly.
To monitor amperage, L1 power supplied to the beater
motor must pass through the power board beater
terminals. The same softech controls are used in both
single and three phase applications. For this reason
the control must be set to operate in an amperage
range which relates to the beater motor amperage and
the desired product viscosity setting.
The selected amperage range simply determines the
adjustment span of the viscosity adjustment
potentiometer on the logic board. The jumper on the
power board determines the amperage range
selection. The jumper is placed on the pin which
corresponds to the beater motor amperage when the
desired product viscosity is attained. See page 28 to
locate the range selection jumper.
Viscosity Control Rang e Selections:
2.4 PIN - 1.2 AMP to 2.4 AMP
5.0 PIN - 2.5 AMP to 5.0 AMP
8.0 PIN - 4.0 AMP to 8.0 AMP
11.2 PIN - 5.7 AMP to 11.2 AMP
Setting Viscosity Adjustment:
1. Place an amp probe on one of the L1 leads on
the beater terminal on the power board.
2. Turn the viscosity adjustment screw to the
“MAX” position.
3. With the freezer properly primed, actuate the
refrigeration cycle (press “AUTO”).
4. During the freezing process, draw a sample
and inspect the product appearance. When
desired product viscosity and appearance is
achieved, note the beater motor amperage.
5. Cancel the refrigeration cycle (press “AUTO”).
6. Using the chart, set what range the beater
motor amperage falls into and place the jumper
on the proper pin. (Note: See chart above for
amperage range.)
7. Press “AUTO”. When amperage achieves the
previously noted beater motor amperage, turn
the viscosity adjustment screw
counterclockwise slowly until the unit cycles
off.
8. Draw several samples to verify that the
amperage at cycle off and product quality
remains consistent.
Mix Adjustment:
The mix setting is the temperature adjustment for the
mix cabinet or the mix hopper.
Ideal mix temperature = 38_F(3.3_C) to 40_F(4.4_C).
Cut-out temperature will always be 13_F(7.2_C)
(cabinet) / 4.5_F(2.5_C) (hopper) lower than the cut-in
temperature. (See SB 2474.)
The range for cut-in temperature is “MIN”
approximately 52_F(11.0_C) and “MAX”
approximately 36_F(2.2_C).
Setting the Mix Cabinet Temperature:
1. Place a thermometer in the cabinet close to the
thermistor probe.
2. Turn the mix adjustment screw all the way to
“MAX”.
3. When the air temperature in the cabinet
reaches 30_Fto31_F (-1.1_C), turn the mix
adjustment screw counterclockwise until the
mix refrigeration cycles off.
4. Allow the mix temperature to stabilize and
adjust the setting if necessary.
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