Hellenbrand ProMate Series Owner's Manual page 33

The drive cap assembly contains the drive cap, the main drive
gear, drive cap spine, piston rod and various other parts that
should not be dissembled in the field. The only replacement 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. Upflow if not applicable
to EA, EE or EI control valves.
The regenerant piston (the small diameter one behind the main
piston) is removed from the main piston by pressing sideways
and unsnapping it from its latch. (Chemically clean in dilute
sodium bisulfate or vinegar, or replace the regenerant piston if
needed. To remove the main 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
bisulfate 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. 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 involving the
drive assembly or the drive cap assembly and pistons unplug
power source jack from printed circuit board (black wire) and
plug back in or press and hold NEXT and REGEN buttons for 3
seconds. 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 posi-
tion.
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 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.
Reattach the drive cap assembly and piston(s) and the drive as-
sembly.
After completing any valve maintenance involving the drive
assembly or the drive cap assembly and pistons unplug power
source jack from the printed circuit board (black wire) and plug
back in or press and hold NEXT and REGEN buttons for 3 sec-
onds. This resets the electronics and establishes the service pis-
ton position. The display should flash all working, then flash the
software version and then reset the valve to the service position.
33
INJECTOR CAP, SCREEN, INJECTOR PLUG
AND INJECTOR
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. 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. 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 o fwater to insure that the proper con-
centration 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.
Refer to Valve Body Compliance Table at the beginning of
this manual.
Push the plug(s) and/or injectors firmly in place, replace the
screen and hand tighten the injector cap.
REFILL FLOW CONTROL ASSEMBLY AND
REFILL PORT PLUG
To clean or replace the refill flow control, pull out the elbow-
locking clip and then pull straight up on the elbow. Replace the
elbow locking clip in the slot so that it is not misplaced. Twist to
remove the white flow control retainer. The flow control can be
removed by prying upward through the side slots of the retainer
with a small flat blade screwdriver.
Chemically clean the flow control or the white flow control re-
tainer using dilute sodium bisulfite or vinegar. Do not use a wire
brush. If necessary, replace the flow control, o-ring on control
retainer, or the o-ring on the elbow.
Reseat the flow control so that the rounded end is visible in the
flow control. Reseat the white flow control retainer by pushing
the retainer into the elbow until the o-ring seats. Remove locking
clip, push down on elbow to reseat and insert locking clip.
Do not use Vaseline, oils or other unacceptable lubricants on
o-rings. A silicone lubricant may be used on the o-ring on the
elbow or the white retainer.
WATER METER
The water meter assembly is connected to the PC board by a
wire. If the entire water meter assembly is to be repaced, remove
the control valve cover and disconnect the power source and wa-
ter meter plugs from the PC board. Unlatch the drive assembly
and lean it forward. Unthread the water meter wire from the side
of the drive assembly and through the drive back plate. To rein-
stall, rethread the water meter wire through the drive back plate
and the side of the drive assembly. Reattach the drive assembly
and the water meter and power plugs.