PEP Filters SMF2-FG - Manual (Page 10)

SMF2-FG Series Media Filter
Operating & Maintenance Manual
PEP Filters • 322 Rolling Hill Road • Mooresville, NC 28117 • 800-243-4583 • www.pepfilters.com
704-662-3133 (Outside USA) Page 9 of 16 Fax 704-662-3155
rev. 01/02
PUMP
Warning: Disconnect all electrical power prior to performing pump maintenance. Turn
the pump shaft by hand. The impeller should spin freely. If not, remove the pre-strainer
from the volute and check with a feeler gauge. The clearance between the impeller and
volute face is 0.015" (0.38 mm). Adjust the clearance, if necessary, by loosening the set-
screws. The impeller and motor shaft are spring-loaded and will slide forward/back. Adjust
the impeller to proper clearance and tighten set-screws. If the impeller remains
obstructed, remove the 4 bolts holding the volute to the motor bracket and impeller, and
inspect the volute for foreign material. Reverse the above procedures for replacement.
BACKWASHING
The media pack must be backwashed whenever the debris build-up causes a 16 psi
pressure drop across the filter media. Since the units with automatic controls perform this
function as necessary, a detailed backwash procedure is only given for manual units.
However, automatic units can be manually backwashed by pushing the button on the
control panel unit the valves change position. The valves will then be automatically
repositioned after two minutes. The filter should be backwashed once a week minimum.
For manual control units using a back wash water source other than the system:
1. Shut off the electrical power to the pump motor.
2. Move the handle on the linkage to position the valves in backwash mode.
3. Allow the filter to backwash for approximately two minutes.
4. Move the handle on the linkage to position the valves in the filtration mode.
5. Re-start the pump motor.
For manual control units using the system water for backwash:
1. Shut off the electrical power to the pump motor.
2. Move the handle on the linkage to position the valves in the backwash mode.
3. Re-start the pump motor.
4. Allow the filter to backwash for approximately two minutes.
5. Shut off the electrical power to the pump motor.
6. Move the handle on the linkage to position the vales in filtration mode.
7. Re-start the pump motor.