Chicago Dryer EDGE - 5.4 Sequence of Operation

Edge/Edge Blanket Operating Principles
5-17
5.4 Sequence of Operation
The unit has 6 phases of operation. In addition,
it will react to various error conditions.
Stand-by Phase
Start-up Phase
Input Phase
Transfer Phase
Spread Phase
Discharge Phase
Error Conditions
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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).
One phase of incoming power supplies
the transformers (T3, T4).
T3 provides 24VAC for the control
circuit.
T4 provides 24VAC for the output
circuit.
When the compressed air is turned on,
the main regulator is pressurized, the air
tank fills, and pressurized air terminates
at discharge conveyor air solenoid
as well as at SV1, SV8, SV20L and
SV20R, each of which is connected to
the main tank.
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