RO Compact Series Technical Manual
32
Why does the system not
run consistently?
1. Low pressure alarm
Feed pressure is too low - Check the inlet
pressure while the system is running. System
will shutdown if feed pressure is below 1 bar.
Check the cartridge filter – replace if the
pressure loss exceeds 0.5 bar.
System leak – check and repair.
2. Low permeate flow
Water temperature is low or the membrane
is fouled.
3. Membrane fouled
Check the system log for history, if a
consistent decline in production is found,
clean the membrane. Contact Kinetico for
the appropriate cleaning procedure and
chemicals.
4. Confirm system operating parameters.
5. Float switches are not operating properly
Check the operation of level switches.
Why is frequent membrane
cleaning required?
1. Recovery too high
Depending upon the water chemistry, a
50% system recovery is recommended
as a maximum. For source water high in
silt, hardness, silica or organics, a reduced
recovery of 35% is recommended.
2. Ineective cleaning solution
Silica treatment requires caustic cleaners
heated to 40°C for maximum eectiveness.
Hardness contamination is cleaned with
acidic solutions.
3. Ineective cleaning procedure
Temperature, flow rate, contact time and
the chemicals used must be taken into
consideration to prevent poor cleaning of
the membrane. Contact Kinetico for further
advice.
4. Damaged membrane
Replace the membrane.
Why is the production
volume slow?
1. The system is not operating within the
required specifications
Confirm the system operating parameters.
The system should run at the stated permeate,
recycle and reject flow rates.
2. Cold temperature
Inlet temperature is less than 10˚C.
3. Fouled membrane
Check the permeate quality.
4. Low pump pressure
The RO-Compact series is designed to
permeate a projected volume at a pump
pressure of 9 - 12 bar and 15˚C. Check if the
pump pressure yields less than 9 bar.
5. Inlet quality changes
Analyse RO feed for chlorine, hardness and
temperature.
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