Setting The Desired Water Hardness Value On The By-Pass Valve - Viessmann AQUAHOME 11-N Installation And Operation Manual

C. Setting the desired water hardness number of the by-pass valve
Soft water
Extended
piston
handle
Softener valve
outlet opening
Softener
valve inlet
opening
OPERATING POSITION
(Normal device operation)
Soft water
outlet
Inserted piston
handle
Fig. 5
BY-PASS POSITION
12
outlet
Hard water
inlet
Change in the
direction of flow of the
hard water part
controlled via the
hardness adjusting
knob setting
Hardness adjusting knob
Turn counter-clockwise to
increase the water hardness
value in the treated water,
clockwise to decrease the water
hardness value
Soft water
Hex nut
inlet
Turn clockwise
to lock the hardness
adjusting knob,
counter-clockwise to
unlock the knob
Hardness adjusting knob
The standard by-pass valve, fitted on
the water softener, features a water
hardness adjusting knob (fig. 5). The
water hardness adjusting knob is used
to adjust the hardness of softened
water. For households it is
recommended to use water with
hardness in the range between 3 and 6
degrees (according to the German
water hardness scale). Prior to any
adjustment, loosen the hex nut of the
water hardness adjusting knob (turning
it counter-clockwise) in order to unlock
it and set it in motion. In order to
increase the water hardness value in
the softened water, turn the water
hardness adjusting knob counter-
clockwise while holding the by-pass
valve handle. From fully closed position
of the water hardness adjusting knob,
the water hardness value can be
increased with the maximum of six full
turns. Exceeding the maximum of 6
counter-clock turns may result in the
depressurization and water leak from
the by-pass valve. It is necessary to
check the hardness of the output water.
If the hardness value is too high in
relation to the desired value, it is
necessary to turn the knob in the
opposite direction while holding the
piston handle. Once the desired
hardness is set, the water hardness
adjusting knob may be locked in place
by tightening the hex nut (turning it
clockwise) until stop. Make sure that
each time the by-pass valve is set in
the by-pass position (i.e. with piston
handle fully pushed in), the water
hardness adjusting knob must be fully
closed (turn it clockwise until stop).