PEP Filters HMF2 - Manual (Page 8)

HMF2 Series Filter System
Operating & Maintenance Manual
PEP Filters • 322 Rolling Hill Road • Mooresville, NC 28117 • 800-243-4583 • www.pepfilters.com
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Rev. 041204
do so could result in poor performance and/or personal injury.
11. Backwash the filter. After back washing the filter, check and record the inlet
and outlet pressure gauge readings. The media should be back washed
whenever the pressure drop across the filter (the difference between the two
gauges) reaches approximately 10 psig over starting pressure.
After First Hour Of Operation
1. Open the air relief valve on top of the filter tank. Close the valve after the air
has been purged from the system. Excessive air release represents a leak in
the pump suction piping, and must be repaired. Air accumulation in the filter
tank can result in an unsafe condition due to excessive pressure within the
tank.
2. Check the unit for any unusual noise or vibration and contact your local PEP
Representative if noise or vibration occurs.
3. Check unit for any air or water leaks.
Operation
During operation, PEP HMF2 filters should be inspected, cleaned and lubricated on a
regular basis. The required services and recommended frequency minimums for
each are summarized on in the Operation and Maintenance Schedule in this manual.
Cold Weather Operation
HMF2 filters exposed to below freezing ambient temperatures require freeze
protection. Installation in a heated indoor space is the best means of preventing the
water from freezing in a filter. Where indoor installation is impractical because of
filter location or space limitations, supplementary heat must be supplied through the
use of electrical heat tape and insulation. The parts of the filter that must be heat
traced and insulated are: pre-strainer tank, pump, piping, valves, pressure switch
tubing, and filter vessel. The unit should be drained when shut down for any period
of time. Refer to the Seasonal Shutdown section of the manual for
recommendations.