Bypass Blending Valve - North Star NSR 17CS Installation And Operation Manual

City softener

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Table Of Contents

Table of Contents

The bypass blending valve works as a typical push-

pull bypass valve, but has the added ability to finely

adjust hardness of the treated water leaving the water

softener. If slightly harder water is desired than is

normally output by the water softener, this bypass

blend ing valve can divert a small stream of hard

water before it enters the water softener and blend it

with the exiting softened water. The amount of water

diverted is controlled by turning a blend adjusting

knob on the end cap of the valve stem (See Figure

43).

1. When the bypass valve is in service position (nor-

mal softener operation), with handle pulled all the

way out (See Figure 43), increase hardness of

treated water by turning the blend adjusting knob

counterclockwise up to 6 turns from the fully

closed position. While adjusting this knob, hold the

bypass valve handle to prevent the stem from

rotating.

2. Do not continue to turn the knob counterclockwise

beyond 6 turns from the fully closed position, as

this would eventually pull the screw's internal o-

rings out of their seat and water would leak from

the bypass valve.

3. Decrease hardness of treated water by turning the

blend adjusting knob clockwise while holding the

bypass handle. When the knob will not turn any

more, hard water is no longer being blended with

treated water.

4. Once the desired hardness is achieved, the adjust-

ment knob may be locked in place by tightening

the hex nut clockwise against the end cap using an

adjustable wrench. Hold the bypass valve handle

to prevent the stem from rotating, or else use

another wrench to grip the stem on the flats

between the end cap and the bypass valve body.

Loosen the hex nut (turn it counterclockwise)

before readjusting the hardness or closing the

diversion path for servicing (see next step)

5. If the water softener is to be serviced or discon-

nected from the bypass valve, the blend adjusting

knob must be turned all the way clockwise to close

the diversion path and prevent water leaking from

the softener valve inlet of the bypass valve.