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SECTION 3: SYSTEM MAINTENANCE
3.1. Pre-Filter Maintenance
Feed water quality will affect the pre-filter service life. A pressure differential between the pre-filter pressure and post-filter pressure
gauges greater than 10 PSI indicates the need to replace the filter. This is critical to ensure the pre-treatment filter will allow the
necessary flow and that suspended particulate is removed from the feed water. This will increase membrane lifespan and improve
production.
3.2. Pre-Filter Replacement
Rubber/Nitrile gloves must be used to prevent microbial contamination.
1.
Turn off the system’s power as a safety precaution.
2.
Shut off the water supply to the unit.
3. Depressurize system by pressing red purge button (Figure 3)
4.
Remove the filter housing by turning counterclockwise with the housing wrench supplied. (Figure 3)
5.
Remove used filter from housing. Inspect inside of housing for sediment / scale. Clean and rinse.
6. Dry thoroughly with clean, lint free cloth or compressed air.
7. Inspect O-ring for damage and verify it is seated correctly. (Figure 4)
8.
Remove all plastic wrapping from filter cartridge. Insert the new filter in the housing and reassemble. –
DO NOT OVERTIGHTEN
– 1/4 turn after hand tight using the supplied filter wrench is usually sufficient. Always use Waterite factory replacement
cartridges.
9. Turn on water supply.
10.
Purge the air from the filter housing by depressing the red purge button until water comes out. (Tip: place towel over purge
button to catch escaping water) (Figure 3)
11.
Wipe area dry and inspect for leaks. If water is leaking from filter housing seal, repeat steps 2-9.
12. Turn on power.
3.3. Membrane Service Life
If you notice a decrease in production from your system, different taste to your drinking water or an increase in Product TDS, this
signifies that your membrane(s) are deteriorating and losing effectiveness. On units with multiple membranes, replace them at the same
time. Where the RO unit is used for pre-treatment requiring water to exact standards, regular ongoing sampling and testing procedures
are necessary to ensure compliance.
Figure 13
Figure 14
3.4. Membrane Removal
Rubber/Nitrile gloves must be used to prevent microbial contamination.
1.
Turn off the system’s power as a safety precaution.
2.
Shut off the water supply to the unit.
3. Verify operating pressure gauge is reading 0 PSI.
4. Loosen bolts and slide top end cap clamp down housing out of the way. (Figure 13)
5. Repeat on all remaining membrane housings.
6. Firmly grasp housing end cap(s) and using a rocking motion, remove them from the housing(s).
7. Lay the housing end cap assembly to the side and remove membrane by lifting it from the housing. Pliers may be necessary
to grasp the membrane if it has been installed for an extended period. (Figure 14)
3.5. Membrane Installation
Rubber/Nitrile gloves must be used to prevent microbial contamination.
Note the Direction of flow label on membrane housing(s).
Down Flow Membranes
1. Remove plastic wrapping/packaging from the membrane element(s).
2. Lightly lubricate the membrane brine seal and all O-rings located in the membrane housing caps with a good quality, silicone
O-ring lubricant (
DO NOT
use petroleum-based lubricants).
3. Insert the membrane element into the housing, so that the brine seal of the membrane will seat at the inlet side of the
membrane housing (this is indicated by the direction of flow label on the housing).
4. Gently push and slowly twist the membrane until the product adapter fully seats inside the housing cap still in place at the
bottom of the housing.
5. Repeat steps 8-10 for remaining membranes.
6. Inspect housing end cap O-rings for damage and to make sure they are seated correctly. Figure 16 & 17
7. Re-install the housing end cap assembly into housings using rocking motion.
8. Re-install the band clamp and snug bolts equally to maintain an even gap between the clamp halves.
9. Repeat steps 6-8 on any remaining housing end cap assemblies.
Figure 15
Figure 16
Figure 17
