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Chapter 4: Series One Controller Operation
4-1 Pre-Startup Checklist
; Are all electrical connections correct, secure, and to code?
; Is the compressed air connection secure and safe?
; Is the hopper level and mounted securely?
; Are the flex hose and pick-up wand secure?
; Can the material level switch activate without obstruction?
; Can the material discharge valve swing without obstruction?
4-2 Operating Sequence
1. Blowback sequence.
2. Motor starts.
3. Flapper discharge valve seals under vacuum.
4. Material conveys.
5. Hopper loader hopper fills.
6. Vacuum timer times out.
7. Motor stops.
8. Blowback sequence begins, the flapper discharge valve opens
under the weight, and material dumps.
Steps 1 through 8 repeat automatically.
If the level switch remains open, the hopper loader remains idle until the material level in the
bin drops and frees the counterbalanced dump valve. Steps 1 through 8 in the loading sequence
as listed above then resumes automatically.