32
COMMERCIAL AND INDUSTRIAL APPLICATIONS
Rev C
TDS rejection lower
than expected
1. Scaled, deteriorated, or
ruptured RO membrane
element.
2. TDS reading taken on salt-
diffused water after period of
inactivity.
1. Replace the element. Assure zero ppm
chlorine reaches membrane element.
2. Take reading at steady state operation.
Refer to page 23 for methods to lessen
the effects of salt diffusion.
Low permeate flow
from refrigerator or
to automatic ice
maker with
acceptable flow
from faucet
1. Pressure drop through tubing
to refrigerator or ice maker
restricting flow.
2. Pressure drop across
refrigerator / ice maker filter
reducing net driving
pressure.
3. Refrigerator / ice maker
water inlet screen is plugged.
1. Use larger tubing diameter. Never use 1/
4-inch tubing. Reduce elevation
difference between Merlin and
dispensing location.
2. Remove built-in filter according to
refrigerator / ice maker manufacturer
instructions.
3. Clean inlet screen according to
refrigerator / ice maker manufacturer
instructions.
Cloudy ice
1. Dissolved gas in the
permeate water creates
minute bubbles in the ice
giving it a cloudy
appearance.
2. Automatic icemaker design.
Many icemaker freeze cubes
from outside - in. This traps
dissolved gas producing
cloudy ice.
3. TDS creep.
1. Operating the system for extended
periods will reduce trapped air.
2. Often, making ice cubes manually will
reduce, but not eliminate, cloudiness.
3. Flush kit.
Issue
Possible Cause
Corrective Action
