TM 10-4610-240-10
TM 08580C-10/1
T.O. 40W4-13-21
e. Adjust Chemical Feed Pump.
(1) Loosen all four control knob thumbscrews.
NOTE
Loosen thumbscrews before adjusting control knobs.
After adjustment, tighten thumbscrews to lock
control knobs in position.
(2)
Turn all four chemical feed control knobs to their maximum settings ( fully clockwise).
NOTE
If pump fails to prime, there may be some particles in the suction or discharge valves. Check Section II,
Chapter 3, Troubleshooting.
(3) With the control knobs set at maximum and RUN/PRIME valves set to PRIME, allow chemical
pump motor to run until solution flow has been established in the polymer hoses.
(4) When solution flow has been established, calibrate the POLYMER flow as follows:
(a) For noticeably turbid (dirty or murky) source water, set POLYMER control knob to 50. Otherwise, set
POLYMER control knob to 35.
(b)
Use the 100-ml graduated plastic cylinder out of Storage Box No. 3.
(c) While POLYMER pump is running, remove polymer return hose from container and catch flow for
1 minute.
(d) If knob was set to 50, flow should be about 60ml/min. Otherwise, it should be about 20 ml/min.
Adjust knob to obtain correct flow. Record knob setting for future reference.
FIGURE 2-53. CONTROL KNOBS
2-59
