North Star NSR 17CS Installation And Operation Manual - page 16
16
Cap
O-Ring Seal
Screen
Support
Screen
Nozzle & Venturi
Gasket
*Flow Plug
(HVDC)
Nozzle & Venturi
Housing
*Flow Plug
Screen
IMPORTANT: Be sure small holes in
the gasket are centered directly
over the small holes in the nozzle &
venturi housing.
*Install with numbered side up concave
side down. Be sure the largest flow plug
is located in the nozzle & venturi housing.
Water Softener Maintenance
CLEANING THE NOZZLE & VENTURI
A clean nozzle & venturi (See Figure 36) is necessary
for the water softener to work properly. This small
unit creates the suction to move brine from the brine
tank into the resin tank. If it should become plugged
with dirt, silt, sand, etc., the water softener will not
work and hard water will result.
To get access to the nozzle & venturi, remove the
softener’s top cover. Put the bypass valve(s) into the
bypass position. Be sure the softener is in the serv-
ice cycle (no water pressure at the nozzle & venturi).
Then, holding the nozzle & venturi housing with one
hand, turn the cap to remove it. Do not lose the o-
ring seal. Lift out the screen support and screen.
Then, remove the nozzle & venturi. Wash the parts in
warm, soapy water and rinse in fresh water. If need-
ed, use a small brush to remove iron or dirt. Be care-
ful not to scratch, misshape, etc., surfaces of the noz-
zle & venturi. Also, check and clean the gasket and
flow plug(s) if dirty.
Carefully replace all parts in the correct order.
Lubricate the o-ring seal with silicone grease and put
in place. Install and tighten the cap, by hand only.
Do not overtighten, which could break the cap or
housing. Put the bypass valve(s) into service (soft
water) position.
RESIN BED CLEANING
If the water supply contains clear water iron, regular
resin bed cleaning is needed to keep the bed from
coating with iron. Use resin bed cleaner, following
directions on the container. Clean the resin every six
months, or more often if iron appears in the condi-
tioned water supply.
FIG. 36
FIG. 37
Wiring Schematic
Back of Electronic
Controller (PWA)
Pwr.
In
Pos./Turbine
Motor
OUT
+5
GND
Turbine
Sensor
Valve
Motor
NO
Position
Switch
NC
24V DC
120V AC
60Hz
Power
Supply
C