Culligan M1 Series Installation, Operation And Service Instructions page 35

3. Unit running but poor quality
(less than 95% rejection)
4. Low quantity of product water.
5. Excessive noise.
6. Inadequate product pressure
(direct feed systems)
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!
Replacing the Prefilter Cartridge
1. Disconnect power to the unit, 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 01022387). 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!
7. Screw the filter bowl back onto the filter head.
8. Turn on the inlet water supply.
Cat. No. 01022940
A. Low pump pressure.
B. Module failure.
C. Concentrate throttling valve
open.
D. Poor seal on endcap or
membrane.
A.-D. Same as 3.
E. Cold water.
A. Air in the plumbing.
B. Misaligned pump.
C. Harmonic vibration.
D. Low feed pressure.
A. Low quantity of product water.
B. Demand for product water ex-
ceeds unit capacity.
The pressure after the prefilter should not be less than 20 psi (138 kPa), or the pump
might be damaged.
Do not use petroleum-based lubricants, because they destroy the synthetic rubber
seal.
A. See 2.
B. Replace modules. Check product line
over pressurization.
C. Throttle valve down.
D. Check o-rings inside endcap. Replace
o-rings if necessary. Check membrane
sealing surface for debris. Check mem-
brane O-ring and replace if necessary.
A.-D. Same as 3.
E. Install additional modules.
A. Check fittings for leaks. Purge air from
system.
B. Remove pump and check for bearing
wear.
C. Install a pressure regulator ahead of the
prefilter.
D. Increase feed pressure above 20 psig.
A. See 4.
B. Install additional modules.
Service and Maintenance 31