User Guide

MODEL # NSSF6-2 System Feeder
Installation, Operation and Maintenance Instructions
PIPING CONNECTIONS
1. Place the NSSF6-2 on a secure
level base or use the optional
wall mounting brackets
2. Using the appropriate pipe
or tubing, connect the outlet
of NSSF6-2 ball valve to the
system — do not use metallic
fittings. Use an approved
thread sealant for PVC and
do not over tighten. Be sure
to secure the ball valve while
tightening the fitting.
3. If possible, the NSSF6-2 should
be connected to the system
at the point of no pressure
change — where the expansion
tank is connected to the system.
DO NOT install a check valve,
pressure reducing valve or a
back flow preventer between
the NSSF6-2 and the system.
If using a bladder style expansion
tank, be sure to inflate the tank
to the same pressure as the cold
static pressure of the system.
This should be done with zero
system pressure.
4. After piping connections
between the NSSF6-2 and the
system have been completed,
the NSSF6-2 can be been filled
with fluid (water or glycol up to
50% solution).
ELECTRICAL CONNECTIONS
1. Connect the power adapter to
the right side of the control box
mounted on the NSSF6-2. The
main body of the UL listed power
adapter has two hook and loop
strips on the back and these can
be used to mount the power
adapter to a convenient surface.
2. With the NSSF6-2 ball valve in
the off position, plug the AC
end of the power adapter into
a standard 120 volt outlet.
PRESSURE SWITCH SETTINGS
The pressure switch includes a
digital display, 4 buttons and 7 LEDs.
When power is first applied to
the NSSF6-2 it will default to
standby — the green LED on the
power adapter will light together
with the following red LEDs on the
pressure switch — Power, PSI and
Run (“Run” will flash until system
pressure matches Cut-out setting).
The digital readout will also show a
reading close to zero.
ADJUSTING CUT-OUT AND
CUT-IN
1. The NSSF6-2 is factory set with
a 16 PSI cut-out and a 15PSI
cut-in. DO NOT SET CUT-OUT
PRESSURE ABOVE 50 PSI.
2. To adjust these settings, the
pressure switch should be in the
“Off” position (“Run” LED off).
a. Push “Set” and the “Down”
LED will flash. Adjust the cut
in setting with the arrow
buttons. Press “Set” to save
the desired cut-in pressure
setting.
b. Press “Set” until the “Up”
LED flashes. Adjust the cut-in
setting up or down — must be
less than cut-out setting. Press
“Set” to save desired cut-out
setting
START-UP
1. Press the on off button and
open the ball valve. The pump
will come on and start pumping
fluid into the system. The “Run”
LED will flash while the pump
is running and will be solid
when the pump stops. The “UP”
LED will light when the system
reaches pressure and the pump
stops. The “DOWN” LED will
light while the pump is running.
2. The pump may cycle on and
off until the system pressure
settles — this is normal. Cycling
may continue until all of the air
is eliminated from the system.
3. If the fluid level in the tank
continues to drop for an undue
amount of time, check for leaks
and repair as needed.
FLOAT SWITCH
A dry alarm contact can be accessed
through the blank connector on
the left side of the control box.
When the fluid level gets low, the
float switch in the tank will shut
the pump off and close the alarm
contact (no/c/nc) on the circuit
board. External alarm can have a
maximum 1 amp load.
Replacement parts are available.
SETTING PRESSURE UNITS
The pressure switch is factory set to
display “PSI”. To change this setting:
1. Press “Off”
2. Press “Up” to scroll through
pressure units.
3. Press “Set” to save setting.