Peerless Water 30 CME Series - Service Manual - Manual (Page 11)

SERVICE INSTRUCTIONS CONTINUED
Replace the valve cover. 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 version
(e.g. 154) and then reset the valve to the service position.
DRIVE CAP ASSEMBLY, MAIN PISTON AND REGENERANT PISTON
The drive assembly must be removed to access the drive cap assembly. The drive cap assembly must be
removed to access the piston(s). The drive cap assembly is threaded into the control valve body and seals with
an o-ring. To remove the drive cap assembly, use the special plastic wrench or insert a 1/4" to 1" flat bladed
screwdriver into one of the slots around the top 2" of the drive cap assembly so it engages the notches molded
into the drive back plate around the top 2" of the piston cavity. See Figure 5. The notches are visible through
the holes. Lever the screwdriver so the drive cap assembly turns counter clockwise. Once loosened unscrew
the drive cap assembly by hand and pull straight out. 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. The
only replaceable part on the drive cap assembly is the o-ring. Attached to the drive cap assembly is the main
piston (downflow or upflow) and if a regenerant is used, a regenerant piston. The regenerant piston (the small
diameter one behind the main piston) is removed from the main piston by unsnapping it from it’s latch.
Chemically clean in dilute sodium bisulfite or vinegar and 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 in dilute sodium bisulfite or vinegar and 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 lubricate the piston rod, main piston or regenerant piston.
Lubricant will adversely affect the 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 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 gear drive
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. The display
should flash all wording, then flash the software version (e.g. 154) then reset the valve to the service position.
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 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.