SECTION 5-2
MAINTENANCE
FLOWMAX RO MANUAL REV: B 05/1999
USFilter
United States Filter Corporation
7.
Install the new filter elements by setting them over the holes in the bottom of the filter
housing. Place the tension springs over the holes on top the new elements.
8.
Replace the top of the filter housing and tighten down the swing bolts.
9.
Restart system as described in Section 3.2, and check for leaks around the top o-ring seal.
10.
If no leaks are observed, the RO unit is back in normal service.
11.
If a leak is detected, turn the RO unit off, wait for the automatic feed water valve to fully
close, remove the top, and inspect the o-ring for damage. If damage is observed, replace
the o-ring.
5.3 MEMBRANE ELEMENT REPLACEMENT
Required down time: 2 - 6 hours
You will need the following:
safety equipment (glasses, boots, etc.)
Lock-Out / Tag-Out equipment
rubber mallet
24 liquid ounces of glycerin
set of new membrane elements
1.
Secure the unit for a short term shutdown as described in Section 4.3
2.
Remove the product pipe connection from the end of the pressure vessel by un-screwing
the PVC union in the product lines. Some water will inevitably drain from the broken
plumbing connections so be prepared for a wet floor.
NOTE:
The flow arrowhead sticker located on one end of the pressure vessel indicates the
direction of flow through the pressure vessel. You must unload and reload the new RO
membrane elements in the direction of flow. This greatly reduces the chance of rolling or
damaging the brine seals.
3.
To determine the correct procedure for pressure vessel end cap disassembly, consult the
pressure vessel manufacturers literature in the Appendix.
4.
Remove the retaining rings that hold the end caps.
5.
Carefully remove the end caps by applying even steady pulling force on them.
NOTE:
Be sure to make note of which end cap came out of which end of the pressure vessel so
they may be reinstalled in the same vessels.
6.
Push the old membrane elements out of the pressure vessel in the direction of the flow
