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Z Series RO System by GE Osmonics
4.4 Disinfection Procedure
WARNING:
Some safety systems are disabled when the RO unit is operated with the Disinfect key
switch. An operator should be present and monitoring the RO unit when operated in this
manner. The following systems will not be operable:
a. RO Interlock(s)
b. Water Quality Monitoring Display
c. Product Divert System
d. Low Pressure Switch
CAUTION:
Glutaraldehyde and Actril™ are not recommended disinfectants.
CAUTION:
Water and solutions to be used must be chlorine free or damage to the RO membranes
may result.
NOTE:
If a Disinfect Alarm Monitor is included in the RO system reference the operation
manual for additional Disinfect key switch operations.
DETERMINATION OF MICROBIAL CULTURING AND DISINFECTION
FREQUENCY IS THE RESPONSIBILITY OF THE OPERATING FACILITY.
The following is recommended for critical applications where bacteria and endotoxins
are a major concern, such as for Hemodialysis.
Disinfect the Z-Series RO every week for one month after installation. This will ensure
that bacteria levels in the fluid paths will be controlled. Sample the purified water for
bacteria before each disinfection. After one month of "no growth" samples the interval
between disinfecting may be increased. Disinfection should occur when any "growth" is
detected. This will inhibit colonization of bacteria in the system and the distribution
plumbing. See section 4.5 for the Product Water Sample procedure.
Disinfection should occur when bacterial growth is above the limits set by the facility, or
when a reading over the maximum AAMI standard is detected. Routine disinfection at
lower CFU counts will inhibit colonization of bacteria in the system and the distribution
plumbing.
Rapid re-growth of bacteria following disinfection, or excessively high colony counts
(i.e. TNTC), may indicate a need for more aggressive intervention. Strategies such as
increased frequency of disinfection, longer dwell times, or alternative chemical agents
may be employed.
1238339b – 16Oct03 4 - 15 Routine Maintenance