Culligan M1 Series Installation, Operation And Service Instructions page 36

Membrane Replacement
Replace an element that has been damaged or cannot be cleaned. See Figure 24.
1. Disconnect power to the unit. Allow pressure to be completely relieved. Turn main feed line to RO off.
2. Remove retaining rings from both ends of all vessels. Do not dispose of retaining rings. They will be needed
during replacement
3. Remove end caps from all vessels, with the tubing remaining in place. Note placement the caps to assure re-in-
stallation in the same orientation.
4. Remove the RO element from the housing. Note orientation of membranes to assure re-installation in same ori-
entation. Flow direction is indicated by the arrow on the outside of the membrane vessel.
5. Check the O-ring seals on the element and end plug, and the element brine seal for damage. If an O-ring is cut
or crimped, it may have caused high flow and poor quality. Replace the O-rings and retest before replacing the
entire element.
6. Remove a new element from its plastic bag. Lightly lubricate the O-rings with a silicone-based lubricant or use a
mixture of 70% glycerin and 30% water.
CAUTION! DO NOT use a petroleum-based lubricant, because it will damage the synthetic rubber
and the membrane.
7. Make sure the brine seal is located in the direction of the incoming feed to that vessel according to the flow
arrow and the original membrane orientation.
8. Lubricate the O-ring on the end plugs with a silicone-based lubricant or use a mixture of 70 percent glycerin and
30 percent water. Re-install the end plugs in to the vessels same as the original orientation. Reinstall the retain-
ing rings.
9. Refer to the section on Initial Startup for information on flushing the shipping solution form the new elements.
NOTE Do not forget to enter the new values for flow, pressure, temperature, and TDS.
NOTICE The RO elements (membranes) require a 24 hour pre-service flush.
32 Culligan® M1 Series Reverse Osmosis
32 Cat. No. 01022940