Service and Maintenance
31
Cat. No. 01022940
3. Unit running but poor quality
(less than 95% rejection)
A. Low pump pressure.
A. See 2.
B. Module failure.
B. Replace modules. Check product line
over pressurization.
C. Concentrate throttling valve
open.
C. Throttle valve down.
D. Poor seal on endcap or
membrane.
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.
4. Low quantity of product water.
A.-D. Same as 3.
A.-D. Same as 3.
E. Cold water.
E. Install additional modules.
5. Excessive noise.
A. Air in the plumbing.
A. Check fittings for leaks. Purge air from
system.
B. Misaligned pump.
B. Remove pump and check for bearing
wear.
C. Harmonic vibration.
C. Install a pressure regulator ahead of the
prefilter.
D. Low feed pressure.
D. Increase feed pressure above 20 psig.
6. Inadequate product pressure
(direct feed systems)
A. Low quantity of product water.
A. See 4.
B. Demand for product water ex-
ceeds unit capacity.
B. Install additional modules.
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 20 psi (138 kPa), or the pump
might be damaged.
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! Do not use petroleum-based lubricants, because they destroy the synthetic rubber
seal.
7. Screw the filter bowl back onto the filter head.
8. Turn on the inlet water supply.
Summary of Contents for M1 Series
Page 83: ...Notes 79 Cat No 01022940 Notes ...
Page 84: ......
