Reattach the main piston to the drive cap assembly. Reattach the regenerant piston (if needed) to the main piston. Do
not use Vaseline, oils, other hydrocarbon lubricants or spray silicone anywhere. A silicone lubricant may be used on
black o-rings, but is not necessary. Avoid any type of lubricants, including silicone, on red or clear lip seals. 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 using a screwdriver as a ratchet until the drive cap bottoms out. Excessive force can
break the notches molded into the drive back plate. To be sure that the drive cap is fully “home” remove the drain port
fitting and verify that the spacer edge is no longer visible through the drain port. 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 (black wire) and plug back in.
This resets the electronics and establishes the service piston position. Now reset the time of day.
SPACER STACK ASSEMBLY
To access the spacer stack assembly remove the drive assembly, drive cap assembly and piston. The spacer stack
assembly can be removed easily without tools by using thumb and forefinger. Inspect the black o-rings and red or
clear lip seals for wear or damage. Replace the entire stack if necessary.
The spacer stack assembly has been 100% tested at the factory to insure proper orientation of one way seals. Do not
disassemble the stack.
The spacer stack assembly may be chemically cleaned (dilute sodium bisulfite or vinegar) or wiped with a soft cloth.
The spacer stack assembly can be pushed in to the control valve body bore by hand. Since the spacer stack
assembly can be compressed it is easier to use a blunt object (5/8" to 1-1/8" in diameter) to push the center of the
assembly into the control valve body. The assembly is properly seated when at least four threads are exposed
(approximately 5/8"). Do not force the spacer stack assembly in. The control valve body bore interior can be lubricated
with silicone grease to allow for easy insertion of the entire stack. Do not use silicone or any other type of lubricant on
the red or clear lip seals or the piston.
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 sec- onds or momentarily
unplug power source jack (black wire). This resets the electronics and establishes the service piston position. The
display should flash text, software version (e.g. 164), and cycle number before resetting the valve to the service
position.
INJECTOR CAP, SCREEN, INJECTOR PLUG AND INJECTOR
Unscrew the injector cap and lift off. Loosen cap with Service Wrench, V3193, or pliers if necessary. Attached to the
injector cap is a screen. Remove the screen and clean if fouled.
The plug and/or injector can be pried out with a small screwdriver. The plug can be wiped clean. If the plug leaks
replace the entire plug. The injector consists of a throat and a nozzle. Replace o-rings. Chemically clean the injector
with vinegar or sodium bisulfite. The holes can be blown out with air. Both pieces have small diameter holes that
control the flow rates of water to insure that the proper concentration of regenerant is used. Sharp objects, which can
score the plastic, should not be used to clean the injector. Scoring the injector or increasing the diameter of the hole
could change the operating parameters of the injector.
Two holes are labeled DN and UP. Check for compliance with one of the following:
a. For down flow systems, the appropriate size injector is located in the “DN” hole, a plug is in the “UP” hole and
that the piston is a combination of the main piston and the regenerant piston;
b. For backwash only systems, a plug is in the “DN” hole and in the “UP” hole, and that only the main piston
exists (the regenerant piston must be removed) and a plug is in the refill flow control position.
Push the plug(s) and/or injectors firmly in place, replace the screen and hand tighten the injector cap.
