Operation, Care & Maintenance
21 Culligan Medallist Series
®
Water Filters
Cullneu
®
Water Filter Refill
As water passes through the Cullneu Water Filter, the media slowly dissolves and neutralizes the water. The rate at which the
Cullneu media dissolves depends on a number of factors such as temperature, flow rate, and pH. Because these factors are
so variable, it is difficult to determine how often new Cullneu media should be added. Tables 4 and 5 show the recommended
intervals for inspection and replenishment of Cullneu mineral. The following procedure should be used to determine when new
media should be added.
• Press and hold the “REGEN” button for approximately 3 seconds. Allow the control to move to the backwash position.
Unplug the control.
• Place the filter in bypass by pushing the red knob of the Cul-Flo-Valv
®
bypass fully inward or by closing the inlet and outlet
valves and opening the bypass valve (three valve bypass).
• Remove the Refill Port from the port opening for 10” tank. For 8” tanks, the control must be removed.
• Using a yardstick, measure the distance between the top of the media and the back top edge of the port opening (this
distance is the freeboard). For eight-inch units, if the freeboard is greater than 17 inches, add enough Cullneu media to
decrease the freeboard to 11 inches. For ten-inch units, if the freeboard is greater than 27 inches, add enough Cullneu media
to decrease the freeboard to 21 inches.
• Wipe the port opening free of media and replace the Refill Port. Make certain the cap is securely locked into place for 10”
tanks. Reassemble the control to the tank for 8” units.
• Place the bypass valve(s) in the service position, plug in the control, and re-set the time of day. Allow the filter to continue
the backwash and rinse cycles. The control will then return to the service position.
Use of Bypass Valve
Depending on where the particular installation was made, the outside sill cocks may or may not be served by filtered water.
Ideally, all lines not requiring filtered water should be taken off upstream of the filter. This is not always possible, however, due to
the construction of the house, or the difficulty or expense of rearranging the piping on older homes.
You should bypass the filter:
• If the outside lines do not bypass the water filter and you do not wish to waste filtered water on lawn sprinkling or other
outside uses.
• If no water will be used for several days and you want to save water by not allowing the unit to backwash.
• If you wish to inspect or work on the valve.
• If a water leak from the valve is evident.
Cul-Flo-Valv Bypass
With the blue knob pushed fully inward (knob up against the barrel of the valve, figure 6), water is routed through the water filter.
Water may be bypassed around the filter by pushing the red knob fully inward. Avoid “slapping” the valve stem when shifting from
one position to another.
Warning! Some water supplies contain potentially hazardous gases. Do not inspect the interior of the
tank using a spark or heat source, or an explosion may result!
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