Emery Thompson CB-350, Инструкция по установке, эксплуатации, уходу и обслуживанию

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v. 3.20
Emery Thompson CB-350 Countertop Batch Freezer
Section 9 – Description of Function
The purpose of this section is to explain how the CB-350 is supposed
work so that anyone working on the machine will have a thorough
understanding, which should make troubleshooting easier. Please refer
to the electrical drawing on the next page for the reference numbers in
parentheses.
With main power present at the machine, the touchscreen (1) should be
active, and the refrigeration button (2) should be in the off position.
When a product is selected on the touchscreen and the start button is
pressed, the dasher motor speed controller (3) sends power to the
dasher motor (4) and the dasher motor runs at the speed pre-
programmed for that product. Also, the auxiliary contacts 10 and 11 on
the dasher motor speed controller (3) close completing that portion of
the circuit that is in series with the refrigeration button (2) and the high-
and low-pressure switches (6, 7).
With the dasher motor running and the refrigeration button turned on,
the solenoid valve (5) on the high-pressure side of the refrigeration
system is energized and CR-1 (11) is energized. When the contacts in
CR-1 close, the refrigeration button lights up and input Q1 on the
touchscreen becomes true, which starts the timer on the touchscreen.
When the solenoid valve opens, and the pressure builds above 40 psi
on the low-pressure side, the low-pressure switch (6) closes. (The high-
pressure switch (7), which, is in series with the low-pressure switch, will
be closed and will only open if the pressure goes above 400 psi, which
is the set point of the high-pressure switch.
When the low-pressure switch closes, the coil (8) to the motor contactor
(9) is energized and the condensing unit and cooling fan (10) begin to
run.
As the condensing unit runs, the refrigeration coils wrapped around the
product cylinder begin to get cold.