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4.1.1 RO Membrane Installation
The membranes utilize an integrated locking jumper tube (Dupont iLEC) system which allows removal and replacement with-
out removal of the membrane housing, hoses, or bottom caps.
However, if the ceiling height does not permit the membrane to be removed while the housing is on the RO unit, the IPS split
clamps will need to be removed in order to remove the feed hoses and membrane housings. Code Line and Dupont have
excellent online videos that show the proper way to remove and replace membranes.
The following procedure lists all the steps to remove and replace the membranes.
Note: If there is room to remove the membranes from the top of the unit, skip steps 4-7 during removal and step 11 of the RO
membrane installation.
•
Turn off the feed water from the supply line. Turn off the power on the controller and verify the feed pressure is 0 psi.
STEPS:
Note: Steps 4-8 are only required when you can't pull the membrane out from the top due to ceiling height.
1.
Open the drain on the underside of the membrane housing.
Disconnect fl ow sensor cable on top manifold.
2.
3.
Remove spit clamp from top manifold to disconnect plumbing.
4.
Remove the split clamps from the side ports of the membrane housings, disconnecting the hose.
5.
Remove the band that holds the membrane on the stand.
6.
Remove membrane housings and lay them on cardboard or soft material to avoid damage to the housings.
7.
Remove the top and bottom caps and look over them to ensure they are not cracked or damaged. Replace the cap
assembly if the damage is seen.
8.
Install new O-ring seals on the cap (large diameter ring) and smaller O-rings on membrane adapters.
9.
Apply a generous layer of silicone grease to the rubber seals, the brine seal (on the membrane), and the membrane
housing chamfers/seal bore to avoid rolling or cutting during installation.
10. Insert membrane (re-use i-LEC adapters on new membranes) into housing from the top opening (feed side)
11. The feed water fl ow runs from the top to the bottom of the membrane housings.
12. The membrane brine seal (black seal at one end of the membrane - fi g. 4.1.1 - 1) must be located at the feed port end
(top port) to ensure proper fl ow of feed water through the membrane.
i-LEC Adaptable Seal
Brine Seal
13. Carefully install the bottom caps and top caps (engage the adapter seal by hand and once aligned tap the cap on
using a rubber mallet and block of wood).
fi g. 4.1.1 - 2 - Membrane seals
Installation
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