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Lancaster 7-LETDAN-2B - Bypass Valve

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PAGE 9
REFILL FLOW CONTROL ASSEMBLY OR REFILL PORT PLUG:
The rell ow control assembly consists of a rell ow elbow, rell ow control retainer assembly, rell ow control,
polytube insert and nut assembly. The rell ow control retainer ts in the rell elbow. The rell ow control retainer
houses the rell ow control which controls the ow rate when the regenerant tank is being relled. The rell ow control
is a exible washer-like part with a small orice and a precision molded contour that delivers a steady 0.5 gpm regenerant
tank rell rate at varying inlet pressures. Rell is accomplished with treated water.
The rell ow control assembly is installed in an easy to access rell elbow located on top of the control valve. The rell
ow control assembly is attached to the control valve with a locking clip. The locking clip allows the elbow to rotate 270
degrees so the outlet can be orientated towards the regenerant tank.
The control valve has a standard rell elbow to which a 3/8” exible tube can be connected.
METER PLUG:
This control valve does not come equipped with a meter, instead a plug is installed. The plug should not need to be
serviced.
To remove the meter plug 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 meter plug is visible. Twist a at blade screwdriver in the slot between the
control valve body and the meter plug. When the meter plug is part way out it is easy to remove the meter plug from the
housing.
DO NOT use a wire brush to clean. Wipe with a clean cloth or chemically clean in dilute sodium bisulte or vinegar.
DO NOT use Vaseline, oils, or other unacceptable lubricants on o-rings. A silicone lubricant may be used on the black
o-ring.
Reinsert the meter plug into the side slot. Hand tighten the nut. Do not use a pipe wrench to tighten nut.
BYPASS VALVE:
The working parts of the bypass valve are the rotor assemblies that are contained under the bypass valve caps. Before
working on the rotor, make sure the system is depressurized. Turn the red arrow shaped handles toward the center of the
bypass valve and back to the arrow direction several times to ensure rotor is turning freely.
The nuts and caps are designed to be unscrewed or tighten by hand. If necessary a pliers can be used to unscrew the
nut or cap. DO NOT use a pipe wrench to tighten or loosen nuts or caps. DO NOT place screwdriver in slots on caps and/
or tap with a hammer. To access the rotor, unscrew the cap and lift the cap, rotor and handle out as one unit. Twisting the
unit as you pull it out will help to remove it more easily. There are three o-rings: under the bypass cap, on the rotor stem
and on the rotor seal. Replace worn o-rings. Clean rotor. Reinstall rotor.
When reinstalling the red arrow handles be sure that:
1. O-rings on both rotors face to the right when being viewed from the front of the control valve when the
handle pointers are lined up with the control valve body arrows; or
2. Arrows point toward each other in the bypass position.
Since the handles can be pulled off, they could be accidentally reinstalled 180° from their correct orientation. To install the
red handles correctly, keep the handles pointed in the same direction as the arrows engraved on the control valve body
while tightening the bypass valve caps.
After completing any valve maintenance, press and hold SET HOUR and ▼ buttons for 5 seconds or unplug power
source jack (black wire) from the circuit board and plug back in. This resets the electronics and establishes the ltering
position. Reset the time of day.

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