North Star NST30ED, NST45ED1, NST70ED1 User Manual
Designed, Engineered &
Assembled in the U.S.A.
Models NST30ED
NST45ED1
NST70ED1
How to install, operate
and maintain your Demand
Controlled Water Softener
If you have any questions or concerns when
installing, operating or maintaining your water
softener, call our toll free number:
1-800-972-0135
or visit www.northstarwater.com
When you call, please be prepared to provide
the model and serial number of your product,
found on the rating decal, located on the back
of the controller top cover.
Systems tested and certified by NSF International
against NSF/ANSI Standard 44
for hardness reduction and efficiency,
and certified to NSF/ANSI Standard 372.
Systems tested and certified by the Water Quality
Association against CSA B483.1.
Manufactured and warranted by
North Star Water Treatment Systems
1890 Woodlane Drive
Woodbury, MN 55125
Installation and Operation Manual
7366546 (Rev. E 9/1/18)
TABLE OF CONTENTS
Page
pecifications & Performance Claims . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
S
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ypical Installation Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
T
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
rogramming the Electronic Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12
P
Controller Features / Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-17
Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-23
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Inspect Shipment
The parts required to assemble and install the water
softener are included with the unit. Thoroughly check
the water softener for possible shipping damage and
parts loss. Also inspect and note any damage to the
shipping carton.
Packing List
All Models:
Model NST30ED:
Remove and discard (or recycle) all packing materials.
To avoid loss of small parts, we suggest you keep the
small parts in the parts bag until you are ready to use
them.
Adaptor ElbowHose Clamps
GrommetDrain Hose
Models NST45ED1:
& NST70ED1:
Bypass Valve
Bypass Valve Clips
Clips
2
Installation
Adaptors
O-rings
FIG. 1
Specifications & Performance Claims
hese models are efficiency rated. The efficiency rating is valid only at the minimum salt dose. The softeners have
T
a demand initiated regeneration (D.I.R.) feature that complies with specific performance specifications intended to
inimize the amount of regenerant brine and water used in its operation.
m
hese softeners have a rated softener efficiency of not less than 3,350 grains of total hardness exchange per pound
T
of salt (based on sodium chloride) and shall not deliver more salt than its listed rating or be operated at a sustained
aximum service flow rate greater than their listed rating. These softeners have been proven to deliver soft water
m
for at least ten continuous minutes at the rated service flow rate. The rated salt efficiency is measured by laboratory
tests described in NSF/ANSI Standard 44. These tests represent the maximum possible efficiency that the system
can achieve. Operational efficiency is the actual efficiency after the system has been installed. It is typically less
than the rated efficiency, due to individual application factors including water hardness, water usage, and other contaminants that reduce a softener's capacity.
Model NST30ED NST45ED1 NST70ED1
Model Code SR30 SR45 SR70
11,800 @ 2.3 lbs.
Rated Softening Capacity (Grains @ Salt Dose)
Rated Efficiency
(Grains/Pound of Salt @ Minimum Salt Dose)
Water Used During Regeneration @ Minimum
Salt Dose
Total Water Used Per Regeneration @ Maximum
Salt Dose
Rated Service Flow Rate 7.3 gpm 10.0 gpm 13.5 gpm
Amount of High Capacity Ion Exchange Resin 0.78 cu. ft. 1.26 cu. ft. 1.94 cu. ft.
Pressure Drop at Rated Service Flow 15.0 psig 11.2 psig 15.0 psig
Intermittent Flow rate @ 15 psi* 7.3 gpm 12.1 gpm 13.5 gpm
Water Supply Max. Hardness 90 gpg 120 gpg 120 gpg
Water Supply Max. Clear Water Iron 8 ppm** 12 ppm** 19 ppm**
Water Pressure Limits (minimum / maximum) 20 - 125 psi***
Water Temperature Limits (minimum / maximum) 40 - 120 °F
Minimum Water Supply Flow Rate 3 gpm
Maximum Drain Flow Rate 2.0 gpm 2.0 gpm 3.0 gpm
25,300 @ 7.4 lbs.
30,200 @ 12.5 lbs.
5,090 @ 2.3 lbs. 5,070 @ 2.6 lbs. 5,080 @ 4.1 lbs.
3.2 gal. /
1,000 grains
39.5 gallons 56.0 gallons 101 gallons
13,300 @ 2.6 lbs.
35,700 @ 9.9 lbs.
45,300 @ 17.2 lbs.
4.1 gal. /
1,000 grains
20,800 @ 4.1 lbs.
55,100 @ 15.2 lbs.
70,000 @ 26.4 lbs.
4.3 gal. /
1,000 grains
*Intermittent flow rate does not represent the maximum service flow rate used for determining the softeners’ rated
capacity and efficiency. Continuous operation at flow rates greater than the service flow rate may affect capacity
and efficiency performance.
**Capacity to reduce clear water iron is substantiated by laboratory test data. State of Wisconsin requires addi-
tional treatment if water supply contains clear water iron exceeding 5 ppm.
***Canada working pressure limits: 1.4 - 7.0 kg/cm
These systems conform to NSF/ANSI 44 for the specific performance claims as verified and substantiated by
test data.
Variable Salt Dose: The salt dose is selected by the electronic controls at regeneration time based on the amount
needed.
2
.
3
18"
DIA.
39"
C
14"
3-3/4"
OUTLET
INLET
INLET -
OUTLET
A
B
Dimensions
A
INLET -
OUTLET
B
E
ominal Resin
D
OUTLET
INLET
18”
dia.
N
Tank Size
Dimension A
Dimension B
Dimension C
Dimension D
Dimension E
NST30ED NST45ED1 NST70ED1
” dia.
8
x 40”
8-3/4” 50” 65-3/4”
4
41-1/4” 41-1/4” 57”
8-1/4” dia. 10-1/2” dia. 12-1/4” dia.
3-3/8” 3-3/4” 3-3/4”
11-1/2” 14” 14”
0” dia.
1
x 40”
2” dia.
1
x 54”
C
39”
FIG. 2
= The water softener requires a minimum water flow of 3 gallons per minute at the inlet. Maximum allowable inlet
water pressure is 125 psi. If your house water pressure is over the maximum, install a pressure reducing valve in
the water supply pipe to the system (Adding a pressure reducing valve may reduce the flow). If your home is
equipped with a back flow preventer, an expansion tank must be installed in accordance with local codes and laws.
= The water softener works on 24V DC electrical power, supplied by a direct plug-in power supply (included). Be
sure to use the included power supply and plug it into a nominal 120V, 60 Hz household outlet that is in a dry
location only, grounded and properly protected by an overcurrent device such as a circuit breaker or fuse.
= Do not use this system to treat water that is microbiologically unsafe or of unknown quality without adequate dis-
infection upstream or downstream of the system.
European Directive 2002/96/EC requires all electrical and electronic equipment to be disposed of accord-
Before You Start
ing to Waste Electrical and Electronic Equipment (WEEE) requirements. This directive or similar laws are
in place nationally and can vary from region to region. Please refer to your state and local laws for proper disposal of this equipment.
4
Installation Requirements
LOCATION REQUIREMENTS
Consider all of the following when selecting an installation location for the water softener.
= Do not locate the water softener where freezing
temperatures occur. Do not attempt to treat water
over 120ºF. Freezing temperatures or hot water
damage voids the warranty.
= To condition all water in the home, install the water
softener close to the water supply inlet, and
upstream of all other plumbing connections, except
outside water pipes. Outside faucets should remain
on hard water to avoid wasting conditioned water
and salt.
= A nearby drain is needed to carry away regenera-
tion discharge (drain) water. Use a floor drain,
laundry tub, sump, standpipe, or other options
(check your local codes). See "Air Gap
Requirements" and "Valve Drain Requirements"
sections.
= The water softener works on 24V DC electrical
power, supplied by a direct plug-in power supply
(included). Provide nearby a 120V, 60 Hz electrical
outlet, in accordance with national and local codes.
= Always install the water softener between the water
inlet and water heater. Any other installed water
conditioning equipment should be installed between
the water inlet and water softener (See Figure 4
below).
= Avoid installing in direct sunlight. Excessive sun
heat may cause distortion or other damage to nonmetallic parts.
PLUMBING CODES
All plumbing must be completed in accordance with
national, state and local plumbing codes.
In the state of Massachusetts: The Commonwealth
of Massachusetts plumbing code 248-CMR shall
be adhered to. A licensed plumber shall be used
for this installation.
AIR GAP REQUIREMENTS
A drain is needed for regeneration water (See Figure
3). A floor drain, close to the water softener, is preferred. A laundry tub, standpipe, etc. are other drain
options. Secure valve drain hose in place. Leave an
air gap of 1-1/2” between the end of the hose and the
drain. This gap is needed to prevent backflow of
sewer water into the water softener. Do not put the
end of the drain hose into the drain.
1-1/2”
air gap
FLOOR DRAIN
Drain
Hose
1-1/2”
air gap
Drain
Hose
1-1/2”
air gap
LAUNDRY TUBSTANDPIPE
Drain
Hose
FIG. 3
Cold Water
to House
Hot Water
to House
THE PROPER ORDER TO INSTALL WATER TREATMENT EQUIPMENT
Untreated Water to
Outside Faucets
Water
Heater
Water
Softener
Optional
Sediment
Filter
5
Pressure
City Water Supply
Tank
Well Water Supply
OR
Well
Pump
FIG. 4
Soft
W
ater
Typical Installation Illustrations
MA
I
N
W
A
T
ER
PI
PE
CROSSOVER
se if water supply flows from the left.
Hard
Water
U
Include single or 3-valve bypass.
120V,
60 Hz
Outlet
1” NPT Sweat
Adaptor (2)
not included
1” NPT
Installation
Adaptor (2) *
O-ring Seal (2) *
Bypass Valve *
Valve
INLET
Clip (4) *
Hard
Hard Water to
outside faucets
Water
From
Softener
Outlet
To
Softener
Inlet
INSTALLATION USING 3-VALVE BYPASS
MA
IN
WA
T
E
R
PIPE
Soft
Water
BYPASS
Valve
OUTLET
Valve
INLET
Valve
Soft
ater
W
Water
Hard
Models NST45ED1 & NST70ED1
1” NPT Sweat
Adaptor (2)
not included
Bypass Valve *
Valve
INLET
* Included with softener. Pipe and
Model NST30ED
fittings supplied by installer.
For soft water SERVICE:
- Open the inlet and outlet valves
- Close the bypass valve
For hard water BYPASS:
- Close the inlet and outlet valves
- Open the bypass valve
6
1” NPT Sweat
Adaptor (2)
not included
Clip (2) *
1” NPT
Installation
Adaptor (2) *
not included
w/ NST30ED
O-ring Seal (2)
Valve
INLET
FIG. 5
Installation Instructions
1. TURN OFF WATER SUPPLY
a. Close the main water supply valve near the well
pump or water meter.
b. Shut off the electric or fuel supply to the water
heater.
c. Open high and low faucets to drain all water from
the house pipes.
2. INSTALL BYPASS VALVE AND/OR
PLASTIC INSTALLATION ADAPTORS:
a. If installing a single bypass valve, push the bypass
valve, with lubricated o-ring seals in place, into the
valve inlet and outlet ports (See Figures 5 & 7A/7B).
- OR -
b. If installing a 3-valve bypass system, slide plastic
installation adaptors, with lubricated o-ring seals in
place, into the valve inlet and outlet ports (See
Figures 5 & 7A).
c. Make sure the turbine and support are firmly in
place in the valve outlet, as shown in Figure 8.
Blow into the valve port and observe the turbine for
free rotation.
d. Snap the two large plastic clips in place on the inlet
and outlet ports, from the top, down (See Figure 9).
Make sure they snap into place. Pull on the bypass
valve, or installation adaptors, to make sure they
are held securely in place.
3. MOVE THE UNIT INTO INSTALLATION
POSITION
a. Move the water softener into the desired location.
Set it on a solid, level surface.
IMPORTANT: Do not place shims directly under the
salt storage tank to level the softener.
The weight of the tank, when full of
water and salt, may cause the tank to
fracture at the shim.
Clip (2)
INLET
Clip (2)
INLET
Turbine
Clip (2)
Models NST45ED1
& NST70ED1
OUTLET
Turbine
Support
Plastic
nstallation
i
adaptors
FIG. 7A
Model NST30ED
OUTLET
Turbine
Support
Bypass
Valve
FIG. 7B
Turbine Support Assembly
Valve Outlet
Bypass
Valve
SINGLE BYPASS VALVE
Pull out for “Service”
(Soft water)
Push in for
“Bypass”
FIG. 6
FIG. 8
Clip
END VIEWSIDE VIEW
O-ring
7
Bypass valve or
plastic adaptor
FIG. 9
Installation Instructions
urn the bypass
T
valve downward if
onnecting to floor
c
level plumbing
OUTLET
INLET
4. COMPLETE INLET AND OUTLET
PLUMBING
Pipe fittings must be 3/4” minimum.
Use:
= Copper pipe
= Threaded pipe
= PEX (Crosslinked Polyethylene) pipe
= CPVC plastic pipe
= Other pipe approved for use with potable water
IMPORTANT: Do not solder with plumbing attached to
installation adaptors and single bypass
valve. Soldering heat will damage the
adaptors and valve.Measure, cut, and
loosely assemble pipe and fittings from
the main water pipe to the inlet and outlet ports of the water softener valve. Be
sure to keep fittings fully together, and
pipes squared and straight.
Be sure hard water supply pipe goes to the water softener valve inlet side.
NOTE: Inlet and outlet are marked on the water sof-
tener valve. Trace the water flow direction to
be sure hard water is to inlet.
IMPORTANT: Be sure to fit, align and support all
plumbing to prevent putting stress on
the water softener valve inlet and outlet.
Stress from misaligned or unsupported
plumbing may cause damage to the
valve.
Complete the inlet and outlet plumbing for the type of
pipe you will be using.
FIG. 10
5. COLD WATER PIPE GROUNDING
The house cold water pipe (metal only) is often used
as a ground for the house electrical system, The 3valve bypass type of installation, shown in Figure 5,
will maintain ground continuity. If you use a plastic
bypass valve at the unit, continuity is broken. To
restore the ground, do the following:
Purchase and securely install two grounding clamps
and a #4 copper wire across the location where the
softener will be, tightly clamping it at both ends, as
shown in Figure 11.
NOTE: Check local plumbing and electrical codes for
proper installation of grounding. The installation must conform to them.
Ground Wire
(not included)
Clamp
(2 - not included)
FIG. 11
6. INSTALL VALVE DRAIN HOSE
a. Measure, cut to needed length and connect the 3/8"
drain line (provided) to the water softener valve
drain fitting. Use a hose clamp to hold the hose in
place.
NOTE: Avoid drain hose
runs longer than 30
feet. Avoid elevating the hose more
than 8 feet above
the floor. Make the
valve drain line as
short and direct as
possible.
NOTE: If codes require a
rigid drain line see
Figure 13.
b. Route the drain hose or
copper tubing to the
floor drain. Secure
drain hose. This will
prevent “whipping'' during regenerations. See
“Air Gap Requirements"
section.
1-1/2”
Air Gap
Drain Fitting
on valve
Valve
Drain
Hose
To
Floor
Drain
FIG. 12
8
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