Chicago Dryer King Edge VAc, Инструкция по эксплуатации

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King Edge Vac Operating Principles
5-23
Stand-by Phase
During this phase, the incoming power
is connected to the unit, but the unit is not
operating.
When the main disconnect switch is turned
ON, power is present in the control box. In
addition:
Line power terminates at:
CON1 (Inlet/Exit inverters).
CON2 (Upper and lower spreader
inverters).
CON3 (Vacuum blower motors).
CON4 (Station 1 and Station 2 invert-
ers).
One phase of incoming power supplies
the transformers (T3, T4).
T3 provides 24VAC for the control
circuit.
T4 provides 24VAC for the output
circuit.
If the compressed air is on, it is
present at the high and low air pressure
regulators and terminates at the main
solenoid air valve.
Start-up Phase
This phase begins when an operator pushes a
green Start button at either station:
NO contacts for CR1 and CR3 are
bypassed.
The bypassed CR1 contact allows 24
VAC to be supplied to the Power Supply
card of MPC1 and its output cards OC2
to OC5 in the right endframe.
OC1 is pre-energized by an output from
T4. Now, MPC1 in the right endframe
sends a signal to energize CR1, which
closes the two NO CR1 contacts.
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One set of CR1 contactors allows power
to flow to energize CON1 and CON2
provided all of the motor thermostats
contacts are closed.
CR2 is pre-energized by output from T4
if all inverter fault contacts are closed.
Once CON2 is energized, contacts close
energizing CON4. This in turns provides
single phase power to T8, which
provides 24VAC to the power supply
portion of the prefeeder MPC1 card.
Single phase power is also provided to
T9, which allows the florescent lamp to
light.
Once CON2 and CR2 are energized,
contacts will close energizing CR3, if all
safety circuit contacts are closed.
While this is happening, MPC1 in the
right endframe sends a signal through
OC2 to energize CR4, closing its
contacts, and signals through OC1 to the
Speed Control board to energize three
of the AC frequency controllers: INV1
(inlet motor), INV2 (discharge motor),
and INV4 (lower spread motors). OC1
and OC3 also energize and set the speed
of INV3 (upper spreader motors).
CON3 is also energized, which causes
the vacuum blower motors to start.
SOL1 is also energized, providing
compressed air to the right side
pneumatics; The prefeeder MPC1
board energizes SOL35 for the left size
pneumatics and energizes CR5, enabling
the input stations to work.
When the Start button is released, the
latching action of the second set of
CR1 contacts and of the first set of CR3
contacts keep the machine running.
NOTE: The compressed air
supply must be turned ON or the
unit will display an AIR PRESSURE
LO message on the CHI Panel.
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