Compliance Table

The regenerant piston (the small diameter one behind the main piston) is removed from the main piston by press- ing sideways and unsnapping it from its latch. Chemically clean this in dilute sodium bisulfite or vinegar, or replace the regenerant piston if needed. To remove the main downflow or upflow piston fully extend the piston rod and then unsnap the main piston, from its latch by pressing on the side with the number. Chemically clean this in dilute sodium bisulfite or vinegar, or replace the main piston.

Reattach the main piston to the drive cap assembly. Reattach the regenerant piston (if needed) to the main piston. Do not lu- bricate the piston rod, main piston or regenerant piston. Lubri- cant will adversely affect the 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 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 (black wire) and plug back in. This resets the electronics and establishes the service piston position. This display should flash all wording, then flash the software version and then reset the valve to the service position.

Spacer Stack Assembly

To access the spacer stack assembly remove the drive as- sembly, 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 clear lip seals for wear or damage. Replace the entire stack if necessary. 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 to allow for easy insertion of the entire stack. Do not use silicone or any other type of lubricant on the clear lip seals or the piston.

Reattach the drive cap assembly and the piston(s) and the drive assembly.

Figure 29

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. The display should flash all wording, then flash the software ver- sion and then reset the valve to the service position.

Injector Cap, Screen, Injector Plug and Injector Replacement Unscrew the injector cap and lift off. Loosen cap with special plastic wrench or pliers if necessary. Attached to the injector cap is a screen. Remove the screen and clean if fouled.

Reattach the drive cap assembly and the piston(s) and the drive assembly.

The plug and/or injector can be pried out with a small screw- driver. The plug can be wiped clean. If the plug leaks replace the entire plug. The injector consists of a throat and a nozzle. Chemically clean the injector with vinegar or sodium bisul- fite. The holes can be blown out with air. Both pieces have smaller 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 param- eters of the injector.

Two holes are labeled DN and UP. Check for compliance. See Table Below.

Application	Injector and/or Plug(s)	Main Piston	Regenerant Piston	Stack

H125 Downflow	Injector in "DN" hole,	151-V3407	15-V3174	151-V3430
Softener or Regenerating	Plug in "UP" Hole
Filter (1.32" Distributor)
H125 Backwash Only	Plug in "DN" and "UP" holes,	151-V3407	None	151-V3430
Filter (1.32" Distributor)	Install Refill Port Plug

Push the plug(s) and/or injectors firmly in place, replace the screen and hand tighten the injector cap.