PAGE 24
SPACER STACK ASSEMBLY (
refer to pages 15&16 for diagrams)
:
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 into 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 assembly.
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 seconds.
This resets the electronics and establishes the service piston position. The display should flash the software version and
then reset the valve to the service position.
INJECTOR CAP, SCREEN, INJECTOR PLUG AND INJECTOR (
refer to page 16 for diagram)
:
Unscrew the injector cap and lift off. Loosen cap with special plastic service spanner wrench (see page 19) 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 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.
Push the plug in the hole marked “UP” and the injector the hole marked “DN”. Replace the screen and hand tighten the
injector cap.
WATER METER (
refer to pages 15,16 & 17 for diagrams)
:
The water meter assembly is connected to the PC board by a wire. If the entire water meter assembly is to be replaced,
remove the control valve cover and disconnect the power source and water 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 reinstall, 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.
THIS WATER METER SHOULD NOT BE USED AS THE PRIMARY MONITORING DEVICE FOR CRITICAL OR HEALTH
EFFECT APPLICATIONS.
If no water meter wire is visible, then a plug is installed, not a water meter.
The water meter wire does not need to be removed from the PC board if the water meter is only being inspected and
cleaned. To remove the water meter assembly, unscrew the meter cap on the left side of the control valve. Pliers may be
used to unscrew the nut if necessary.
With the nut removed, a slot at the top of the water meter is visible. Twist a flat blade screwdriver in the slot between the
control valve body and the meter. When the meter is part way out it is easy to remove the water meter from the housing.
Once the water meter is removed from the control valve body, gently pull forward on the turbine to remove it from the
shaft.
Do not use a wire brush to clean the turbine. Wipe with a clean cloth or chemically clean in dilute sodium bisulfite or
vinegar. The turbine can be immersed in the chemical. Do not immerse electronics. If the turbine is scored or damaged or
the bearings on the turbine are worn, replace the turbine.
Do not lubricate the turbine shaft. The turbine shaft bearings are prelubricated. Do not use Vaseline, oils, or other
unacceptable lubricants on the o-ring. A silicone lubricant may be used on the black o-ring.
Snap the turbine on the shaft and reinsert the water meter into the side slot. Hand tighten the nut. Do not use a pipe
wrench to tighten nut.
Summary of Contents for 7-LXC-50
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