Filter
Top Products
3.0 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 5 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 Osmonics evaluates each application and
water condition and makes specific recommendations to ensure continuity of the mem-
brane membrane element warranty. Data from the water analysis is processed with a com-
puter 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 Osmonics for review and recommenda-
tions for operation of the machine.
Before entering the machine, the feed water must be filtered to 5 microns.
Thin-layer composite (TLC) membrane element 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 elements have 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 Osmonics
CAUTION
: 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 regeneration.
3.2 S
tart-Up
NOTE: If your machine is provided with the membrane elements installed in the hous-
ings, proceed to 3.2.1. If your machine is provided with the membrane elements
in shipping boxes, you must load the membrane elements in the housings prior
to starting the machine. For membrane element loading instructions, skip to
Section 4.6 (Membrane Element Installation). Upon completion of membrane
element installation, return to Step 1 to continue your start-up procedure.
12