Pulsafeeder Polyfeeder EN User Manual
Page 27
27
6.7.2.2.3 Stopping the Polymer Mixing System
The polymer mixing stop sequence is initiated by pushing the “SYSTEM START/STOP” button or upon
opening of the remote start/stop contact, while in the run state. Upon receiving either signal, the system
will proceed through a fixed series of actions with programmable delays. The shutdown sequence
provided by the controller is as follows:
1. Stops the polymer delivery pump.
2. Waits a user adjustable delivery pump off wait time (provides flushing).
3. Stops the mixing chamber AC motor/impeller.
4. Waits a adjustable mixer off delay time (0-255) seconds (provides rinse)
5. Shuts the water valve, supplying primary and secondary dilution. (rinse completed)
The stop sequence can be pictorially represented as:
System
Running
System
Stop
Signal
Polymer Pump
De-energized
Mixer
Motor/Impeller
De-Energized
Water Valve
Closed
System
Stopped
Polymer off
Delay Time
Mixer Motor
Off Delay
Time (seconds)
Figure 6-7-2-2-3 STOP/SHUTDOWN SEQUENCE --POLYMER MIXING SYSTEM