Service and Maintenance
65
Cat. No. 01023095
8. Lubricate the O-ring on the end plugs with a silicone-based lubricant or use a mixture of 70% glycerin and 30%
water. Re-install the end plugs in to the vessels same as the original orientation. Reinstall the retaining clips.
9. Refer to
for information on flushing the shipping solution form the new elements.
NOTE Do not forget to record the new values for flow, pressure, temperature, and TDS.
HOUSING
END CAP
RETAINING RINGS
SCREWS
MEMBRANE
O-RING
BRINE SEAL
FLOW
Figure 26.
RO membrane.
Testing Modules
If the product flow calculations or NFLOW values show a loss of flow, or the product quality has become poor, one or
more elements will require cleaning or replacement. Because poor performance might be due to only one element, test
the product flow and quality from individual housings.
To test each element:
1. Disconnect the product tubing from the housing to be tested.
2. Choose GO TO RUNNING from the main menu.
3. Measure the product flow and TDS from the test element.
4. Choose GO TO OFFLINE from the main menu.
5. Reinstall the tubing.
6. Continue testing the elements as needed to determine which should be cleaned or replaced.
Cleaning Modules
During the operation of any reverse osmosis system, dissolved solids and particulate matter are concentrated inside the
module element. If these contaminants are present in relatively low concentrations, the concentrate flow from the system
flushes them to drain. In most cases, water pretreatment such as filters and softeners will prevent the deposit of these
contaminants.
When these deposits occur, there will be a decrease in the product water flow and quality. When these symptoms be-
come excessive, the modules must be cleaned before they are permanently damaged.
To determine when cleaning is needed, compare the current system performance to the performance of the system when
the reverse osmosis elements were new. Use
to obtain data and compare the performance of the system, “new”
and “now” (record the data in pencil).
