2-9. OPERATING PROCEDURES - cont.
When solution flow has been established in SODIUM HEX and CHLORINE hoses, calibrate the flows as
follows (refer to figure 2-56):
Set SODIUM HEX control knob on chemical feed pump to 3.
Locate the 100-ml graduated plastic cylinder out of storage chest No. 3.
Disconnect SODIUM HEX return hose (male connector) from SODIUM HEX chemical can (female
With the chemical feed pump operating, direct solution flow from SODIUM HEX return hose into 100
ml cylinder for 1 minute.
After one minute, remove the SODIUM HEX return hose from the cylinder.
Measure the amount of SODIUM HEX solution in the cylinder.
SODIUM HEX flow rate should be
If flow rate is too high, turn SODIUM HEX control knob clockwise to reduce flow.
If flow rate is too
low, turn control knob counterclockwise to increase flow.
Repeat steps (d) through (h) until flow rate is correct.
Repeat steps (a) through (h) for CHLORINE flow.
Do NOT turn RUN/PRIME valves to RUN; leave them in PRIME position.
Leave CITRIC ACID control knob at maximum setting; no calibration is required for CITRIC ACID flow.
RUN/PRIME valve remains in PRIME position throughout normal operation.
With both raw water pumps working, and the chemical feed pump running, set POLYMER chemical feed
RUN/PRIME valve to RUN (figure 2-50).
Vent Multimedia Filter. Refer to figure 2-57. Vent multimedia filter and check for vent line blockage as follows:
Set VENT MULTIMEDIA FILTER valve, VENT PULSE DAMPENER valve (only on Models WPES-10,
WPES-20, and WPES30), and VENT CARTRIDGE FILTER valves to CLOSE.
There should be air venting from the vent pipe (figure 2-58) as the multimedia filter fills, followed
by a steady stream of water when the filter is full. If not, the vent line is probably blocked by a
small piece of filter media. Notify unit maintenance.
Set VENT MULTIMEDIA FILTER valve to OPEN.
Change 2 2-91