Taylor 161 Service Manual - page 13
9
Model 161
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 16
to locate the range selection jumper.
Viscosity Control Range 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 the
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 previous chart 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 hopper.
Ideal mix temperature = 38_F (3.3_C) to 40_F
(4.4_C).
Cut-out temperature will always be 4.5_F (2.5_C)
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).