(d) Tag and disconnect the lines on the multimedia filter control valve (fig. 2-15) and backwash timer
pilot valve and allow lines to dry. After draining the lines, reconnect them to valves as tagged.
Drain booster pump:
Run BOOSTER PUMP for no more than 5 seconds (fig. 2-57).
Set switch to STOP.
Repeat the last two steps until no more water comes from cartridge filter drain (fig. 2-39).
Drain chemical feed pumps as described below:
Chemicals can cause sickness or death if extreme care is not taken.
Wear protective devices when working with these solutions.
To avoid staining, be careful not to spill any solution on clothes or
equipment. If any solution is spilled, it should be washed away
immediately with water.
Empty and rinse all chemical containers and fill them with brine water.
Set chemical pump valves to PRIME (fig. 2-66).
Run pump motor to rinse chemical pumps. Set all control knobs (fig. 2-7) to maximum setting.
Remove quick disconnectors from all chemical containers.
Allow pump to run (37, fig. 2-4) for 5 to 10 seconds to empty water from chemical pumps.
Stop pump motor and empty chemical containers.
Set chemical pumps valves to off position.
Drain distribution pump and raw water pumps No. 1 and No. 2:
Disconnect inlet and outlet hoses.
Tip pump toward each connection to permit drainage.
Open pump vent valve (fig. 2-42).
Open pump drain valve (fig. 2-48).
Run pumps (38-40, fig. 2-4) for less than 5 second intervals until all water is out.
Shut off pumps.