ProMinent ProMix Series, Operating Instructions Manual, Page: 28 / 68

Pr o Minent ProMix
‘DB' & 'PB’ Polymer Feeder
ProMix Series MA Batch/Inline User Manual
28
2.7
Operation Configuration
2.7.1 Setpoints
Control of the neat polymer feed pump is set by the System Start and Polymer Pump
switches located on the ProMix control panel door. The type of polymer, either emulsion or
Mannich , and the operation, either Inline or Batch, are selected via the controller keypad or
browser interface. Refer to the ProMix Mode and Polymer charts in section 1.6.
NOTE: In Batch mode the ProMix feeder adjusts the pump speed as the measured Primary &
Post dilution flow rates vary to maintain the setpoint polymer concentration.
2.7.2 mA Outputs
The polymer feeder includes two DC isolated 4-20mA controller outputs. Typically, Customer
Analog:D would be used for monitoring the pump control signal and is sent to a customer
device as max pump speed or partial speed if signal is scaled. PolymerPump:C is used as
the actual 4-20 mA feed control signal to the polymer pump.
2.7.3 Feed Verification
Feed verification ensures that the polymer pump is actually delivering polymer by monitoring
the output of the pump. A thermal flow switch is employed for this purpose as an optional
feature for ‘other’ type pumps selection. The Gamma XL pump utilizes an integral relay for
feed verification.
2.7.4 Pump Calibration
Before placing the ProMix system in operation the polymer pump should be calibrated at
maximum dosing and the resultant gph rate entered into the configuration menu for pump size
(see pump setting in section 2.4). A calibration cylinder is provided on most ProMix systems to
assist in the calibration of the polymer pump. The following procedure should be followed to
calibrate a GXLA type pump, assuming all installation requirements are met:
1. Configure pump for manual operation, set desired suction viscosity spm, and set stroke length
to 100%.
2. Fill calibration cylinder to top mark by manipulating valves & pump to allow neat polymer into
the cylinder. Manually fill the calibration cylinder if it is not possible to use the pump output.
3. Keep ProMix feeder connected to the actual system so that maximum application back pressure
is realized.
4. Open primary dilution water valve so that the mix chamber fills when system is started.
5. Manipulate pump valves so that pump suction is connected to the calibration cylinder only.
6. Manually run pump at maximum rated strokes per minute and time the calibration column
drawdown for at least 30 seconds taking note of beginning and end marks. Calculate the gph
pump rate from the volume and time.