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working, therefore make sure the drain line is well secured so it can not move around when
pressurized. If not adequately secured, the drain line could vibrate during backwash, particularly
during the initial purge of air from the top of the tank, causing excessive noise. If this is
experienced, use additional fixtures to better secure the drain line. The drain line should not be
exposed to freezing temperatures.
Note: Never connect the drain line directly into a drain. Allow an air-gap of a minimum of 1
inch (check local codes) between the drain line and waste line to prevent possibility of back-
siphon. Always follow local codes.
Step 7 – Control Valve Set-up
During cold weather, the installer should warm the control valve to room temperature before
operating. Note: All electrical connections must be done according to local codes.
Plug the control valve into a standard, grounded 120volt (60 Hz) electrical outlet. Be certain that
the outlet is uninterrupted and not controlled by a switch. The Fleck 2510SXT control valve comes
with a 5 foot long electrical cord. An extension cord may be used to reach a suitable electrical
outlet. Ensure that the extension cord is UL/CSA certified and of an appropriate wire gauge for the
application.
The digital display on the control valve will illuminate. Open the valve’s protective housing by
removing the screw located at the top right of the control valve and swinging the door open. This
will give you access to the buttons on the control valve. The digital display should be alternating
between the current time setting (which is probably incorrect), and the number “3” which indicates
the number of days remaining until the next regeneration cycle. You will also see the “service”
icon which appears as a small faucet in the bottom left corner of the display window.
