64
Culligan® Series M2 Reverse Osmosis
64
Cat. No. 01023095
Prefilter Cartridge Replacement
The prefilter cartridges should be changed when the pressure drop across the prefilter increases by 15 psi (103 kPa).
Refer to the diagram in the installation section.
CAUTION! The pressure after the prefilter should not be less than 15 psi (103 kPa), or the pump
might be damaged.
Replacing the Prefilter Cartridge
1. Turn the unit OFF, then shut off the inlet water supply.
2. Unscrew the filter bowl.
3. Remove the old cartridge.
4. Clean the filter bowl with a damp cloth, rinse thoroughly.
5. Remove the wrappers from a new cartridge (10” P/N 00403232, 20” P/N 01000222). Install the cartridge in the
bowl, making sure it seats in the bottom of the bowl.
6. Check the O-ring seal for dryness and cuts. Replace the seal if necessary and use silicone lube as needed.
CAUTION! Do not use petroleum-based lubricants, which destroy the synthetic rubber seal.
7. Screw the filter bowl back onto the filter head.
8. Turn on the inlet water supply.
Membrane Replacement
Replace an element that has been damaged or cannot be cleaned. (Refer to
1. Turn off the system. Allow pressure to be completely relieved. Turn main feed line to RO off.
2. Remove retaining clips from both ends of all vessels.
3. Remove end caps from all vessels, with the tubing remaining in place. Note placement the caps to assure re-
installation in the same orientation.
4. Remove the RO element from the housing. Note orientation of membranes to assure re-installation in same
orientation. Brine seal will be facing the incoming feed to the vessel. 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.
