Hellenbrand HRO 6 Series, User Manual

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HRO 6 07/26/12
ABNORMAL PERMEATE FLOW
As time progresses, the efficiency of the membrane will be reduced. In general, the salt rejection does not
change significantly until two or three years after installation when operated on properly pretreated feed
water. The permeate flow rate will begin to decline slightly after one year of operation, but can be
extended with diligent flushing and cleaning of the system. A high pH and/or precipitation of hardness
can cause premature loss in rejection.
Permeate flow should be within 20% of the rated production, after correcting the feed water temperatures
above or below 77°F. Check your permeate flow meter to determine the permeate flow rate.
NOTE: TO DETERMINE THE TEMPERATURE CORRECTION FACTOR, LOCATE THE
TEMPERATURE CORRECTION TABLE IN THIS USER’S MANUAL AND FOLLOW THE DIRECTIONS