GE E4LE - Manual (Page 22)

2.18 Pre-filter Cartridge
A 5 micron pre-filter cartridge is factory installed to protect the membrane elements
and valves from particles, which may be in the feed water. To order replacements,
see the Spare Parts List (Technote 118, P/N 1233377).
A pressure drop across the filter of 8 psi (0.55 bar) or more during operation indicates
that the pre-filters cartridge(s) need changing. Use only GE approved filters rated for
5 microns or less. Do not attempt to clean used filters.
IMPORTANT NOTE: Failure to change the pre-filter cartridge according to these
requirements will void machine warranty.
2.19 Membrane Element Cleaning
GE recommends that you clean your RO every quarter, depending on the quality of
your feed water. Cleaning of the membrane elements is vital because contaminants
can build up on the membrane element surfaces, reducing the permeate flow rate
and affecting the quality of the permeate.
2.19.1 Step Wise Cleaning
This RO machine and many others have a centrifugal pump on them.
Centrifugal pumps are not designed to draw water. They are designed to
operate with flooded suction only. The manufacturer recommends using a
Clean-In-Place (CIP), or booster pump, to provide water pressure and flow to
the RO machine pump from the CIP container.
2.19.2 Procedure to Clean with a CIP Pump
STEPS
1. With the machine running, open the CIP permeate valve, close the
permeate service valve and fill the CIP tank with permeate water.
When the container is filled to desired level, turn machine OFF.
2. Add and mix up the cleaners in the CIP container. Please use only
PA membrane element compatible cleaners.
3. Close the inlet feed water supply valve to the machine and open the
CIP inlet feed water to the CIP container.
4. Close the permeate valve to point of use and also the concentrate
valve drain.
5. Open the CIP valves, allowing permeate and concentrate to return to
the CIP container.
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