Taylor C706 - Generation II Logic Board

16
Controls
Models C706 & C707
Generation II Logic Board
The Generation II logic board’s primary function is to
interpret modes of operation. The board monitors mix
levels and temperatures by sending commands to the
control’ s power board. Commands are sent via a
ribbon cable, enabling the proper relays on the power
board to open or close. (See illustration on page 28.)
Function
Interpret a mode of operation/monitor mix level and
temperature/monitor product viscosity or product
temperature and send a command to the power board
through a ribbon cable enabling the proper relays on
the power board to be open or closed.
Logic Board Part Numbers
As of July, 1996 we have modified the differential on
Generation II controls from 13_F/7.2_Cto
4.5_F/2.5_C in order to meet the new NSF mix
temperature requirements. The new control has a
shunt (jumper) to select proper temperatures. This
shunt is located beneath the dip switches on the left
side of the control. The shunt is set in the upper
position for 4.5_F/2.5_C differential for use on mix
hopper systems and in the lower position for
13_F/7.2_C differential for use on mix cabinet
systems. The new control is compatible with older
units. This change will require new part numbers as
follows:
Old Part No. New Part No.
X36641-SER Gen. II X36641SER1
X38523-SER Gen. II-W/Chime X38523SER1
X41072-SER Gen. II-W/EVC X41072SER1
X42002-SER Gen. II-Hopper Pump X42002SER1
Power Board Part Number
X32326-SER
Thermistor Probes
There are three types of thermistor probes used on
softech freezers. The resistance value of the
thermistor probes corresponds with the temperature.
As the temperature becomes warmer, the probe
resistance decreases.
X31602 -- Barrel Probe (Senses product in
freezing cylinder.)
X50717 -- Hopper (Senses temperature of mix in
hopper with new Generation II.)
X36267 -- Cabinet Probe (Senses mix cabinet
air temperature.)
Approximate probe resistance readings:
10,000 OHMS at room temperature (77_F/25_C).
30,035 OHMS at hopper/cabinet temperature
(35_F/2_C).
48,636 OHMS at soft serve temperature
(18_F/-7.7_C).