Installation and Service Manual – Carbon Filter
Page 25
Copyright © 2012 Applied Membranes, Inc. All Rights Reserved.
Drive Cap Assembly
Disassembly:
After removing the bracket assembly the drive back plate can be removed by squeezing the 2 locking tabs
(located at 3 and 9 o-clock around the white gear) and rotating the back plate counter clockwise. The four 1⁄4-20 screws
can then be removed and the drive cap pulled straight back out of the valve. Turning the main gear counter clockwise
drives the piston in and may aid in pushing out the cap.
Inspection:
The drive cap assembly contains the drive cap, the main drive gear, drive cap spline, piston rod and various
other parts that should not be dissembled in the field. Visually inspect the drive cap for damage and free operation of the
gear and threaded rod. The only replaceable part on the drive cap assembly is the o-ring.
Main Piston
Disassembly and Inspection:
Attached to the drive cap assembly is the main downflow piston. To remove, fully extend
the piston rod and then unsnap the main piston from its latch by pressing on the side with the number. Chemically clean
the piston in dilute sodium bisulfite or vinegar, or replace it. The main piston is Teflon coated. If the teflon coating is
abraded, replace the main piston.
Reassembly:
Reattach the main piston to the drive cap assembly. Reinsert the drive cap assembly and piston into the
spacer stack assembly and hand tighten the drive cap assembly. Continue to tighten the drive cap assembly until the
backside of the drive cap bottoms out and is flush with the casting or the black o-ring on the spacer stack assembly is no
longer visible through the drain port. Excessive force can break the notches molded into the drive back plate. Make
certain that the main drive gear still turns freely. The exact position of the piston is not important as long as the main drive
gear turns freely.
Reattach the drive assembly to the control valve and connect all plugs. After completing any valve maintenance, press
and hold NEXT and REGEN buttons for 3 seconds or unplug power source jack (4 pin, black cable) and plug back in. This
resets the electronics and establishes the service piston position. The display should flash all wording, then flash the
software version and then reset the valve to the service position.
Spacer Stack Assembly
Disassembly and Inspection:
To access the spacer stack assembly remove the drive assembly, drive cap assembly
and piston. The spacer stack assembly can then be pulled straight out. Inspect the black o-rings and inner seals for wear
or damage; replace the entire stack if necessary. Do not disassemble the stack. The spacer stack assembly may be
chemically cleaned (in dilute sodium bisulfite or vinegar) or wiped with a soft cloth.
Reassembly:
The spacer stack assembly can be pushed into the control valve body bore by hand. The assembly is
properly seated when at least four threads are exposed (approximately
⅝
”). Do not force the spacer stack assembly in.
The control valve body bore interior can be lubricated with silicone to allow for easy insertion of the entire stack.
Reattach the drive cap assembly and piston(s) and the drive assembly.
After completing any valve maintenance, press and hold NEXT and REGEN buttons for 3 seconds or unplug power
source jack (4 pin, black cable) and plug back in. This resets the electronics and establishes the service piston position.
The display should flash all wording, then flash the software version and then reset the valve to the service position.
