Figure 4-2. Chemical Metering Pump Maintenance
Chemical metering pump priming. Following coagulant or inhibitor drum replacement or pump
maintenance, prime pump as follows:
Set stroke and speed controls (Figure 3-5) to 100.
Set pump ON/OFF switch on control station to ON.
Connect piece of hose to air purge valve (Figure 4-3) to collect any air or liquid that may appear.
While pump is priming, open air purge valve on back of pump.
Close air purge valve when fluid is free of air.
When pump is primed, turn pump ON/OFF switch on control station to OFF.
Set chemical metering pump controls as follows:
COAGULANT PUMP (P2)
INHIBITOR PUMP (P4)
Record completion of maintenance action in maintenance logbook.