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- CARE OF YOUR REVERSE OSMOSIS SYSTEM -
REVERSE OSMOSIS SYSTEM CARE GUIDE
MODEL NO. 625.384700
1. AT LEAST every 6 months, replace the prefilter and postfilter cartridges. Clean or replace the flow control and
screen.
2. Replace the RO membrane cartridge when the percent rejection of total dissolved solids (TDS) is less than shown
in the specifications (see B, below).
If any of the following occur before the 6 months, replace as directed.
A. Slow Making of Produot Water: Replace the prefilter cartridge. C. Ch/orine Tasteand/or Odor: Replace the prefilter,postfilter and
Ifthe production rate does not improve, replace the postfilter car- RO membrane cartridges.
tridge and RO membrane cartridge.
B. High Total Dissolved Solids (TDS) in Product Water: You can
get a free TDS test through some Sears retail stores or service
departments. If the store or service department does not have a
TDS meter, you can send treated and untreated water samples to
a water analysis lab for testing. It is important to test both the
treated and untreated water to determine system performance. If
the TDS is not within the system's performance guidelines,
replace the prefilter, post filter and RO membrane cartridges.
OTHER TROUBLESHOOTING
PROBLEM CORRECTION
Chlorine taste and/or
odor in the RO product
water
Other taste and/or odor
CAUSE
The ppm of chlorine inyour water supply
exceeds maximum limits, and has de-
stroyed the RO membrane.
The prefilter is no longer removing chlo-
rine from the water supply.
Postfilter expended.
RO membrane cartridge expended.
Contamination in product water storage.
Water supply to the RO system not within
specifications.
Prafilter or RO membrane cartridges
plugged with sediments.
Ifthe water supply contains more than 2.0 ppm of chlorine, addi-
tional filtering of the water supply to the RO is needed. Correct
this condition before doing maintenance on the RO system.
Replace the prefilter, post filter and RO membrane cartridges,
flow control, and screen.
Replace the post filter cartridge. If taste and odor persists, re-
place the prefilter cartridge, RO membrane cartridge, flow con-
trol, and screen.
Use sanitizing procedures. Replace the post filter cartridge.
System makes product Increasewaterpressura, praconditionthewater, etc., asneeded
water too slowly to conform before doing maintenance on the RO system.
Replace the prefilter cartridge. Ifrate does not increase, replace
the postfilter cartridge, RO membrane cartridge, flow control,
and screen.
System makes lower Storage tank air-charge lees than 5 - 7 Open RO faucet and drain tank until flow slows to a drip, Keep
amount of produot water psi. faucet open and check tank pressure. If low, pressurize to 6 psi.
than usual Close faucet to refill the tank.
High tota/ dissolved so/- WatersupplytotheROsystemnotwithin Incraase water prassure, precondition the water, etc., as needed
ids (TDS) in product wa- specifications, to conform before doing maintenance on the RO system.
tar
RO membrane cartridge expended. Replace the prefilter, postfilter and RO membrane cartridges,
flow control, and screen.
Water leaking from fau- Drain side of faucet airgap (3/8" tubing) Inspect and eliminate restriction or plug. Refer to installation
oet airgap hole plugged, restricted, or incorrectly con- instructionsfor proper drain connection.
nected to drain point.
Continual water flow to ; Check valve or automatic shutoff assem- Clean, repair or replace as needed.
drain bly plugged, restricted or parts worn
Note: Sanitizing is recommended after servicing inner parts of the system(see page 9).
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