WP440L-Series Reverse Osmosis System
Installation Instructions and User Manual
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This procedure is best completed with the pump held in a vertical position, motor down.
First, complete “Disassembly” instructions 1 through 5 under “Impeller Stack Changeout.” (see previous page)
6. Remove 4 cap screws holding pump body to motor. Pump handle will come off with top cap screws.
7. Unscrew pump shell from pump body, turning clockwise (left hand threads).
8. Remove mechanical shaft seal spring and rotating half from motor shaft. Use care not to scratch motor shaft when
removing rotating half.
9. Remove pump body from motor and place on flat surface, face down. Again, use care not to scratch motor shaft.
10. Use a screwdriver to push ceramic seat out from seal cavity as shown.
11. Installation of ceramic seat:
a. Turn pump body over so seal cavity is up, clean cavity thoroughly.
b. Clean polished surface of ceramic seat with a clean cloth.
c. Lubricate outside rubber surface of seat with soapy water. Place cardboard washer over polished face of
seat and press into seal cavity using a 3/4" socket or a piece of 3/4" standard pipe.
d. Be sure polished surface of seat is free of dirt and has not been damaged by insertion. Remove excess
soapy water. Dispose of cardboard washer.
12. Installation of rotating half and spring:
a. Reinstall pump body on motor using extreme caution not to hit ceramic portion of seal on motor shaft.
Reattach pump body to motor using cap screws. Be sure to reinstall pump handle at this time.
b. Inspect shaft to make sure that it is clean.
c. Clean face of rotating half of seal with a clean cloth.
d. Lubricate inside diameter of rotating half with soapy water and slide onto motor shaft (sealing face first).
e. Place spring over motor shaft so it rests on rotating half.
13. To complete reassembly from this point, reverse instructions 1 through 5 under “Impeller Stack Changeout.”
Note: Lubricate suction and discharge O-Rings with soapy water for easier installation of shell.
Shut Down and Storage
CAUTION:
Handle all chemicals with care. Wear protective clothing and eye protection
.
Membrane Storage (outside of RO system)
To prevent bacterial growth and help maintain flux, it is recommended that elements be immersed in a solution 20.0
percent, by weight, AM-225 and 1.0 percent by weight AM-88.
Prepare the Solution:
Make a water solution by adding about 1 ounce of AM-88 per gallon of water (use RO permeate if
possible). Also add about 1.5 lbs of AM-225 per gallon of water.
Storing Elements:
Mix the solution well. Soak the elements in this solution for 1 hour. Drain and seal in plastic bags.
RO System Storage and Biocidal Protection
Mechanical Seal Changeout
