Pulsafeeder Polyfeeder EN User Manual
Page 26
26
6.7.2.2 Operating the Polymer Mixing System
6.7.2.2.1 Starting/Stopping the Polymer Mixing System
The Polymer Mixing system has a fully programmable start up and shutdown sequence. System delays
may be put into the system to provide for system start lags and system self flushing timings.
the system components simultaneously by placing the operational mode switch into the pump off
position.
6.7.2.2.2 Starting the Polymer Mixing System
The polymer start sequence is initiated by pushing the “SYSTEM START/STOP” button (local control
mode) or upon closure of the remote start/stop contact (remote control mode). Upon receiving either
signal, the system will proceed through a fixed series of actions with programmable delays. The startup
sequence provided by the controller is as follows:
1. The water valve, supplying primary and secondary dilution, is opened providing system
flow. The system then looks for primary water flow to occur via flow sensor or flow switch.
If no flow, the system shuts down.
2. Waits a user adjustable delay Water on time (0-255) seconds
3. Starts the mixing chamber AC motor/impeller.
4. Waits a adjustable mixer on delay time (0-255) seconds
5. Starts the polymer delivery pump.
6. Waits for an “Alarm Delay” time where alarms are ignored until the time elapses.
7. Proceeds to “RUN” status, displaying the current polymer flow setpoint and water flow set
point.
The start-up sequence can be pictorially represented as:
System
Start
Water Valve
Opened
Water
Running
?
Water on
Delay Time
Mixer
Motor/Impeller
Energized
Mixer on
Delay Time
Polymer Pump
Energized
Alarms
Activated
Delay Time
System
Running
Time (seconds)
Figure 6-7-2-2-2 START UP SEQUENCE--POLYMER MIXING SYSTEM