WP440L-Series Reverse Osmosis System
Installation Instructions and User Manual
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1. Remove clamps from vessel using 9/16” socket or wrench. Use two screw drivers on each side to push end caps out
of vessel slowly.
2. Push the membrane out through the vessel from the feed end towards the concentrate end.
3. If there is not enough room to remove the membrane from the vessel through the concentrate end it can be removed
from the feed end.
4. Install the new membrane from the feed end. Ensure that the brine seal is oriented towards the feed end. Check that
the end adapters and all o rings are in good condition and in position.
5. Replace end plug(s) using glycerin lubricant as required on O rings (AMI Model No. H-C111DC).
6. It is highly recommended to have a spare set of O-rings and brine seal while replacing the membranes.
7. As the membranes may have preservative or be contaminated, please wash your hands thoroughly after replacing
membranes.
Illustration 14 – Membrane Replacement
Low Pressure Switch Adjustment
Adjust in the proper sequence:
1. Range:
Turn nut down (clockwise) for higher cut-in pressure, or up (counterclockwise) for lower cut-in.
2. Differential:
Turn nut down (clockwise) for higher-cut-out pressure, or up (counterclockwise) for lower cut-out.
Illustration 15 - Low Pressure Switch
