16
Figure 6. Conductivity Probe Display
4. OPERATION AND MAINTENANCE
The operation and maintenance of an E-Series RO machine requires regular data
recording and routine preventative maintenance. It cannot be emphasized enough
the importance of filling out the Daily Log Sheet (Technote 106) during each operating
shift. A Start-Up Data Sheet (Technote 105) should have been completed at startup
containing pertinent facts on the operation of your machine. These two records are
invaluable in diagnosing the performance of the equipment, and must be kept for
reference. If you have questions concerning the operation of your machine or the
method of data recording, contact the manufacturer.
Three preventative maintenance procedures, which must be done on a regular basis,
are as follows:
1. Change the pre-filter cartridges as needed. Pressure drop across the pre-
filters should not exceed 8 psi (0.6 bar).
2. Clean the RO membrane elements with approved cleaners at least quarterly,
depending on feed water quality.
3. Flush the RO machine daily.
4.1.1. Daily Flushing for the Economy Model
If your E4-Series machine is an ECN Model it needs to be manually flushed daily. The
DLX E4-Series machine is equipped with an Autoflush Timer (Section 3.5, Autoflush
Timer). A daily manual flush must be performed. To flush the machine:
1. With the machine running, open the concentrate valve 1/2 - 3/4 turn.
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