PEP Filters HMF2 - Manual (Page 9)

HMF2 Series Filter System
Operating & Maintenance Manual
PEP Filters • 322 Rolling Hill Road • Mooresville, NC 28117 • 800-243-4583 • www.pepfilters.com
9 of 19
Rev. 041204
Seasonal Shutdown
The following services should be performed if the unit is shut down for a prolonged
time period.
1. Shut off all electrical power.
2. Close the shut-off valves in the filter inlet and outlet water lines. For units
using a backwash source other than the system, close the shut-off valve in
the line from that source.
3. Drain all external piping to and from the filter.
4. Open the manual vent valves and the drain line to the filter tank and piping.
After the water has drained, close the drain and vent.
5. On manual units only, rotate the valves manually by moving the linkage up
and down to ensure operation without obstruction.
6. Loosen the bolts that hold the filter access lid in place and remove the
inspection port cover. Lubricate the bolt and replace the port gasket if
necessary.
7. Inspect the over drain assembly and media pack. If the media is
contaminated, remove the foreign material and replace the media if
necessary. Install the filter access port and secure the bolts.
Maintenance Procedures
Pump Pre-Strainer
Warning: Disconnect all electrical power prior to performing pump maintenance.
The filter pre-strainer basket on the pump inlet must be kept clean and free of
debris. Shut off the power, close the valves, open the air relief valve, remove bolts
and lid. Remove and clean the basket. Replace basket, lubricate O-ring, and tighten
bolts.
Backwashing
The filter media must be backwashed when the differential pressure is reaches
approximately 10 psig. Since the units with automatic controls perform this function
as necessary, a detailed backwash procedure is only provided with manual units.
The backwash cycle on automatic units can be manually initiated by pushing the
button on the control panel unit the valves change position. The valves will then be
automatically repositioned after two minutes. HMF2 filters should be back
washed once a week minimum.