3030226 Rev. D 5-4 Routine Maintenance
5.1.1 Per Treatment Day Maintenance
1. Test and record the hardness level of the RO feed water in the pretreatment log,
if necessary.
2. Observe and record salt level in the brine tank (for systems with a water
softener).
3. Observe and record the chlorine/chloramine concentrations in the pretreatment
log. Follow the instructions included with each test kit.
WARNING:
If multiple treatments are performed in one day, the chlorine/chloramine testing
is to be performed and recorded before each treatment.
WARNING:
Take corrective action or contact your local service representative if any optional
pretreatment device fails to provide adequate treatment of RO feed water before
continuing with the use of the RO.
4. If you are using cartridge pre-filters with your RO, observe and record the pre-
filter inlet and outlet pressure gauges on the operation log. The difference in
the pressure values will help measure the condition of the filter cartridge. When
the pressure differential (delta P) increases 8 PSI above the clean, initial delta P,
the cartridges need to be changed (or sooner if the pre-filter core appears
soiled). To change the pre-filter, the water supply must be turned off. The pre-
filter inlet and outlet gauges should read zero PSI. The pre-filter bowl can now
be removed by rotating it clockwise (as viewed from above). Remove the old
filter, install the new filter and re-install the filter bowl.
5. Observe and record the percent rejection and TDS/µS water quality readings in
the operation log. These readings can be taken from the various screens.
5.1.2 Weekly Maintenance
1. Disinfect/Sanitize the system, if needed. Refer to the disinfection procedure in
Section 3.3 or the sanitization procedure in Section 5.4.
NOTE:
Low pH chemical cleaning should be performed as a method to remove
transitional metals from the RO membrane prior to chemical sanitization.
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