Automatic Polymer Makedown Systems
Installation, Operation and Maintenance Manual
72-910-APMDS-E Rev D
Skid Layout and Components
Page
13
4.
Optional: Turn the Polymer Tank Mixer switch, marked “MIXER” to the “AUTO” position.
5.
Optional: Select the Mixer Cycle desired:
6.
Turn the Main Power switch, marked “POWER” to the “ON” position; the unit will begin to
function automatically.
Polymer Makedown Process
o
Process Start
This is a polymer makedown system utilizes a batch process sequence. The makedown
process is triggered to start when the high level switch in the storage tank is open, and the
low level switch in the tank changes from closed to open, indicating that the level in the
tank has just dropped below the low level.
o
Polymer Makedown for Tank Fill
When triggered to start the controller will energize the Water Inlet Solenoid Valve to open,
allowing municipal water to flow into the system. This flow is verified by the condition of
the Flow Switch changing from Open to Closed contact. At the same time the Neat Polymer
Pump is energized to pump neat polymer into the water flow where it is ‘made-down’ into a
polymer solution and stored in the storage tank. This process continues until the High Level
switch is closed, leading to the process flush cycle.
Flow Switch Interrupt – When the Water Inlet Solenoid Valve is open, the Flow Switch
status should show Closed to verify water flow in the system, and otherwise show Open
indication that water flow has terminated. There are two alarm conditions that will be
triggered by the Flow Switch, causing the Red ‘Flow Alarm’ light to illuminate and power
supply to be removed from the Water Inlet Solenoid Valve and the Neat Polymer Pump
until reset by the Flow Switch condition returning to that expected, or by removing power
from the PLC allowing this alarm to reset to off when power resumes.
1.
No Flow Alarm: There is a 5 second delay from the opening of the Water Inlet
Solenoid Valve to reading the flow switch status for alarm. If the Flow Switch
contact status is Open (indicating No Flow, or loss of incoming water) the alarm
condition in will be activated.
•
1/9 = 1 minute “ON” followed by 9 minutes “OFF”
•
4/6 = 4 minutes “ON” followed by 6 minutes “OFF”
•
7/3 = 7 minutes “ON” followed by 3 minutes “OFF”
•
10/0 = 10 minutes “ON” with no “OFF” time; continuous operation
