Operations and Maintenance Manual
E4H Series Water Purification Machine
19
3. PREPARATION AND START-UP
3.1 Pretreatment for Water Purification
All systems will operate most efficiently on filtered water with a pH of less than 6.5 and a Silt
Density Index (SDI) of 3 or below. If the machine is operated on higher pH water, other forms of
pretreatment may be necessary. A water analysis prior to start-up of the machine is required.
To minimize the chances of calcium carbonate, calcium sulfate, or other salt precipitation on
the membrane, GE Water & Process Technologies strongly suggests that each application and
water condition be evaluated so that specific recommendations can be made to ensure
continuity of the membrane warranty. Data from the water analysis is processed with a
computer program analysis to determine if potential problems exist. If the machine is to be run
at a different location than was originally intended, a new water analysis is required for
warranty consideration and should be sent to GE Water & Process Technologies for review and
recommendations for operation of the machine.
Before entering the machine, the feed water must be filtered to 5-microns.
TFC membrane feed water must not contain the following chemicals or permanent loss of
rejection and/or permeate flow may result:
• Free chlorine
• Formalin (until after a membrane has been run for 24 hours; thereafter, 0.5%-
formaldehyde may be used as a biocide)
• Iodine compounds
• Quaternary germicides
• Cationic surfactants
• Detergents containing non-ionic surfactants
Cleaners not approved by GE Water & Process Technologies
A water softener should not regenerate while the machine
is
running unless safeguards are used to be sure the machine
is
operated on softened water during
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Caution!
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