USER MANUAL
Models SD-820 to SD-1710 with DDS
Rev 04 – October 2005
6
1.8 USE OF A PREFILTER AND AFTERFILTER (CONTINUED)
Both filters should be equipped with an incident monitor (i.e., differential pressure
indicator) to advise of premature blockage of the filter elements. Elements must be
changed annually regardless of the reading on the indicator.
Summary of Contents for SD-1050 Series
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