North Star 157102 User manual

1
M157103A
Owner’s Manual
Instructions for Installation, Testing, Operation, Servicing, and Storage
12V RV Pump: For use in RVs to transfer potable water, indoor use only.
WARNING
•READ and UNDERSTAND the Owner’s Manual completely before using this potable
water pump. Install, test, and use only in accordance with the Owner’s Manual instructions.
•WEAR personal protective gear when filling, using, cleaning, and servicing the water
pump.
•DO NOT START water pump until ready to use to avoid unintentional distribution.
•FOR INDOOR USE ONLY.
•ALWAYS keep a fire extinguisher rated “ABC” nearby.
Improper use of the water pump could result in serious injury to the operator or nearby
persons/animals, or could cause damage.
Any Questions, Comments or Problems
Call NorthStar Product Support 1-800-270-0810.
157102
ITEM NUMBER: 157102, 157103 & 157104
SERIAL NUMBER: ____________________
157103 & 157104

Hazard Signal Word Definitions
2

Table of Contents
3
Intended Use .................................................................................................................................... 4
Summary of Important Safety Information....................................................................................5
Before Installation
During Installation
General Safety
Operation
Accident Procedures
Warning Label Location ..................................................................................................................6
Installation
Step One: Prepare for Installation................................................................................................7
Step Two: Mounting....................................................................................................................7
Step Three: Plumbing ..................................................................................................................7
Step Four: Connect pump to 12 Vdc power supply......................................................................8
Step Five: Check and test the installation of the pump...............................................................10
Operation
Preparing the Pump for Use....................................................................................................11
Using the Pump
Step One: Operate the pump...............................................................................................12
Step Two: Clean pump after each use.................................................................................13
Storage.............................................................................................................................................13
Preparing for storage
Removing from storage
Troubleshooting..............................................................................................................................15
Specifications...................................................................................................................................17
Accessories.......................................................................................................................................19
Exploded Views...............................................................................................................................20
Limited Warranty...........................................................................................................................23

Intended Use
4
The pump is intended for use in RVs to transfer potable/drinking water, for indoor use only.
The pump is intended for intermittent or continuous duty when the proper operating criteria is met.
The technical specifications for your pump are provided in the Specifications section of this manual.
Follow all safety precautions presented throughout the manual. A summary of important information
can be found at the beginning of this manual.
Contact NorthStar Product Support at 1-800-270-0810 for any questions about the
appropriate use of the pump and/or optional accessories.
Example Plumbing Schematic

Summary of Important Information
5
WARNING
Read and understand this owner’s manual completely before using the pump, particularly
the plumbing section.
Improper use of the pump could result in serious injury or illness for the operator or
nearby persons/animals, or cause damage to the environment.
LISTED BELOW is a summary of safety information of particular importance. See individual
sections of this owner’s manual for more details.
-------------------------------- BEFORE INSTALLATION---------------------------
•READ and FOLLOW the plumbing instructions and warnings in the RV manual.
•CHECK for properly sized wiring and correct electrical protection.
•CONFIRM the mounting location will allow adequate ventilation to prevent overheating.
•TURN power OFF to the existing pump(s).
•RELIEVE system pressure.
•DISCONNECT the main power to the pump.
------------------------------ DURING INSTALLATION---------------------------
•EXERCISE CAUTION when attaching pump to 12 Vdc power supply. Follow the steps listed
in the Installation section of this manual when connecting the pump to the power supply.
•CHECK and TEST installed pump as directed in this manual.
•DO NOT MODIFY pump design.
-------------------------------GENERAL SAFETY---------------------------------
•READ and FOLLOW instructions and warnings in this manual.
•READ and FOLLOW instructions and warnings in the RV manual.
•DO NOT USE flammable or corrosive chemicals in this pump.
-----------------------------------OPERATION--------------------------------------
Before Use
•INSPECT and PREPARE pump before each use as directed in this manual.
•SANITIZE the pump before each use and prior to storage.
•DO NOT TURN ON POWER to pump until ready to USE to avoid unintentional flow.
During Use
•TURN OFF power to pump, and RELIEVE system pressure before leaving pump unattended.
•SEE Troubleshooting section of this manual before attempting any repairs. Wear personal
protective equipment and follow safety instructions.
After Use
•SANITIZE pump according to the directions provided in this manual.
Accident Procedures
Immediate response is necessary in the event of a pump leak. See instructions below:
Pump leak
If the pump develops a leak, immediately stop using. Turn off power to the
pump and refer to the troubleshooting section of this manual, as applicable.

Warning Label Location
6
Always make sure warning labels are in place and in good condition. If a warning label is missing
or not legible, order new labels or unsafe operation could result. To order replacement warning labels,
call NorthStar Product Support at 1-800-270-0810.
Item #
Part #
Description
Model
157102
799657
Decal, 2.0 GPM RV Pump
2060R
157103
799667
Decal, 3.0 GPM RV Pump
3055R
157104
799672
Decal, 5.0 GPM RV Pump
5055R
157102
157103 & 157104

Installation
7
Step One: Prepare for Installation
•This NorthStar pump is self-priming.
•The pump is for indoor use only and should be mounted on a solid surface in a location that
is dry and provides adequate ventilation.
•Prior to installation ensure properly sized wiring, proper electrical protection and
adequately sized plumbing lines and connections.
Step Two: Mounting
•The pump may be mounted in any horizontal position. If mounting the pump vertically, the
pump head should be in the down position so that in the unlikely event of a leak, fluid will
not enter the motor.
•Secure the rubber feet with #8 fasteners. DO NOT compress the feet, doing so will reduce
their ability to isolate vibration/noise. (Note: fasteners are not included.)
•Mount pump within 6 feet of the tank for best pump performance and longer pump life.
Step Three: Plumbing
•See table below for port size and recommended hose sizes.
oRemove shipping plugs from pump ports.
oUse included NorthStar swivel fittings to connect flexible high-pressure tubing to the NPS
ported pumps.
oUse included NorthStar quick connect fittings to connect flexible high-pressure tubing to the
quick connect ported pumps.
oTo insert quick connect fittings, lubricate O-ring with water and twist fitting while inserting
into pump port.
NOTE: NorthStar does not recommend the use of rigid pipe to plumb the inlet/outlet ports.
•Tubing/hose should be flexible, compatible with potable water and rated for the pump’s
maximum pressure. At least 18" [450mm] length is suggested to minimize stress on the
fitting/ports and reduce noise. Allow for the shortest possible tubing/hose route and avoid
sharp bends that may kink over time.
•The tubing/hose should be anchored where it meets rigid pipe/hard plumbing to reduce
vibration.
•Installation of the include potable water approved 50-mesh strainer is required to prevent
foreign debris from entering the system. Failures due to foreign debris are not covered
under the warranty.
NOTE: Restrictions on the inlet may cause a loss in performance. Additionally, inlet pressure must
not exceed 30 psi [2.1 bar]
•If a check valve is installed in the plumbing, it must have a cracking pressure of no more
than 2 psi [.14 bar].
CAUTION
DO NOT locate the motor near plastics that could melt or combustible material. The surface
temperature of the motor may exceed 200°F [93°C].
Model
Ports
Minimum inlet hose size
Minimum outlet hose size
2060R
3/4" Quick Connect
1/2" (13mm) Inside diameter
1/2" (13mm) Inside diameter
3055R
1/2” NPS – M
1/2" (13mm) Inside diameter
1/2" (13mm) Inside diameter
5055R
1/2” NPS – M
1/2" (13mm) Inside diameter
1/2" (13mm) Inside diameter

Installation (continued)
8
Step Four: Connect pump to 12 Vdc power supply
WARNING
Caution must be exercised when making connections to a 12 Vdc power supply to avoid shock.
ALWAYS follow the safety instructions and steps listed below in exact sequence when
connecting the pump to a 12 Vdc power supply.
1. Preparatory
safety
Preparatory safety steps:
•ALWAYS use eye protection.
•NEVER smoke or work near sparks or other sources of ignition.
2. Electrical
requirements
•The pump should be on a dedicated (individual) circuit, controlled
with a double pole switch (UL/CSA certified) rated at or above the
fuse ampere indicated by the pump motor label. Depending on
distance of the power source from the pump and ampere load on the
circuit, wire may need to be heavier than indicated by the chart.
•Use an approved wire of the size specified below or heavier.
Item #
Voltage
Model
Fuse
(amp)
Wire Leads
Wire Size
(Stranded MTW)
157102
12 Vdc
2060R
10A
RED (positive +)
BLACK (negative -)
#14 AWG (2.5mm2)
(or heavier)
157103
12 Vdc
3055R
10A
RED (positive +)
BLACK (negative -)
#14 AWG (2.5mm2)
(or heavier)
157104
12 Vdc
5055R
20A
RED (positive +)
BLACK (negative -)
#14 AWG (2.5mm2)
(or heavier)

Installation (continued)
9
3. Connect pump
to 12 Vdc
power supply
Connect the pump to a 12 Vdc power supply using the following procedure:
a) Strip off about 1/2" of insulation from the end of each power supply
wire.
b) Position the pump’s red wire parallel with the positive (+) wire from
power supply. Secure using a twist-on wire nut.
c) Position the pump’s black wire parallel to the negative (-) wire from
the power supply. Secure using a twist-on wire nut.
WARNING: Always connect in this sequence to avoid possible shock.
Negative (black)
Positive (red)
Negative (black)
Positive (red)
157102
157103
&
157104

Installation (continued)
10
Step Five: Check and test the installation of the pump
WARNING
•Serious injury could result from leaks if pump is improperly assembled, installed or the
design of the pump is modified.
•Follow the steps below to ensure the pump is properly installed. Never modify the pump
design.
1. Check
installation
Check installation to ensure the pump is properly mounted, wired, plumbed and
in safe working condition.
2. Test with
potable water
Test the system for leaks with potable water:
a) Fill the tank with potable water.
b) The pump is an “on demand” pump. When turned on, the pump will
prime itself, then turn off once reaching pressure. When the demand for
flow continues, the pump will automatically re-start.
c) Check for leaks throughout the system. If a leak is detected, fix the leak
and re-test the system with potable water.

Operation –Preparing the Pump for Use
11
Inspect and prepare pump before each use.
Important safety rules:
•Power off. Make sure all power is OFF before cleaning, inspecting, or servicing the pump.
•Guards / shields. Make sure all guards and shields are replaced after servicing the pump.
•Replacement parts. If a part needs replacement, only use parts that meet the manufacturer’s
specifications. Replacement parts that do not meet specifications may result in a safety
hazard or poor operation of the pump.
1. Ensure clean
system
Ensure the pump has been thoroughly flushed, drained, and sanitized.
2. Inspect &
repair
Inspect and test the system thoroughly with potable water:
a) Inspect hoses/ lines for exposed mesh and holes. Replace all worn
or damaged hoses/ lines.
b) Inspect fittings for cracks and leaks. Replace NorthStar pump if
needed.
c) Partially fill system with potable water and turn on to test for
leaks. Repair as needed.
IMPORTANT: After any repair work has been done, ALWAYS test for
leaks with potable water one final time before using.
WARNING
•Read instructions below carefully for inspecting and preparing the pump.
•Damaged or clogged equipment could result in leaks or uncontrolled distribution.
•Leaks could result in injury to the operator or bystanders.

Operation –Using the Pump
12
Step One: Operate the pump
WARNING
ALWAYS wear personal protective equipment when operating or servicing the pump.
1. Review
safety
information
Review the Summary of Important Information section provided in this
manual.
2. Wear
personal
protective
equipment
Wear personal protective equipment as needed.
3. Turn on
power
Turn on the power to the pump.
Note: The pump will start automatically when power is turned on. The
pump will cycle on and off as needed to retain pressure in the hose.
4. Pressure
switch
operation
The pressure switch reacts to outlet pressure, and interrupts power at the
preset shut-off pressure indicated on the pump label. When outlet pressure
drops below a predetermined limit the switch will close and the pump
operates until the shut-off pressure is achieved. The shut-off pressure is set to
factory calibrated standards.
Note: If the plumbing is restrictive or the flow rate is very low, the pump
may re-pressurize the outlet faster than the fluid is being released, causing
rapid cycling (*ON/OFF within 2 seconds). If the pump is subjected to rapid
cycling during normal operation, or for infrequent periods, damage may
occur. Applications which exhibit rapid cycling should have restrictions in
the outlet minimized.
5. Leaving
unattended
If the pump must be left unattended at any time:
a) Disconnect power to the pump.
b) Relieve system pressure.
6. Discontinue
use if
clogged or
inoperative
If the pump becomes clogged or inoperative during use, discontinue use
immediately.
- Do not attempt to service while water is in the pump and power is
connected.
- Return to the troubleshooting section of this manual before attempting to
service.
CAUTION
•DO NOT operate the pump at pressures which cause the motor to exceed the amperes rating
indicated on the name plate.
•Improper adjustment of the pressure switch setting may cause severe overload or premature
failure. Failures due to improper adjustment of the pressure switch setting will not be
covered under the warranty.

Storage
13
Step Two: Clean pump after each use
The pump should always be stored indoors.
For long term or winter storage, prepare the pump by running RV antifreeze through the system. This
will keep internal parts lubricated, protect against corrosion, and keep the unit from freezing.
CAUTION
•The pump will be damaged if it freezes.
•Protect the pump from freezing during storage by following the instructions below.
Preparing for storage:
1. Add antifreeze
Pour RV antifreeze into the pump system.
Note: RV antifreeze is non-toxic and biodegradable and generally safer
for the environment than automotive antifreeze.
2. Operate
briefly
Turn on the pump and run the pump system briefly until fluid is distributed
through plumbing system.
Removing from storage:
1. Drain
Drain the antifreeze left in the plumbing system into a suitable container.
2. Flush with
water
Fill the potable water tank with potable water and run through the system.
Operate the pump system until the system is completely flushed. Be sure to
set up containers to capture the antifreeze flush water.
3. Disposal
Dispose of the antifreeze and flush properly with potable water.
4. Sanitize
To ensure clean, safe drinking water, it is important for your health to
sanitize the potable water system if the pump has been sitting in storage or
has not been used for a while. The potable water holding tank, hot water
tank, and the water lines are potential places for bacteria to grow.
Before you start, read all of the instructions in this manual on how to
properly sanitize the plumbing system.
Before you get started, there are some things to consider.
•You will need at least 5 to 10 hours of time to complete this task.
•Remove the water filters while sanitizing the water system and
consider replacing the water filter when you have completed the
sanitation.
•If you have a hot water tank, this is an ideal time to flush out the
hot water tank.

Storage (continued)
14
Sanitize your potable water system.
1. Determine the size of your water system, the potable water
holding tank, plus the hot water tank and two to three gallons for
your water lines, depending on your set up. Refer to your owner’s
manual.
2. Prepare a 5% sodium-hypochlorite solution using chlorine bleach
(non-scented and non-gel) and water. Use the chart below for mix
concentrations.
Fresh Water Tank
Size
Amount of
Bleach
Mix Including
Water
40 gallons (152 liters)
1 cup (240 ml)
4 gallons (16 liters)
50 gallons (190 liters)
1 1/4 cup (300 ml)
5 gallons (20 liters)
60 gallons (227 liters)
1 1/2 cup (360 ml)
6 gallons (24 liters)
80 gallons (302 liters)
1 3/4 cup (420 ml)
7 gallons (28 liters)
100 gallons (380 liters)
2 cups (480 ml)
8 gallons (32 liters)
3. Add bleach mixture to the water tank –NEVER POUR
STRAIGHT BLEACH INTO THE FRESH WATER TANK!
4. If you have a bypass for your hot water tank, make sure that is set
for normal use so that the bleach mixture will be pumped through
the hot water tank.
5. Top off the potable water tank with potable water.
6. Run the chlorinated water through all lines (hot and cold, one at a
time) for one to two minutes. You should be able to smell the
chlorine.
7. Top off the potable water tank again.
8. Let it sit for 4 hours minimum; overnight is best. The most
important thing is to wait the appropriate amount of time for the
tank to be properly sanitized.
NOTE: Doubling the bleach will not cut the time in half! Drain and rinse the
potable water tank and water lines several times with fresh, potable water.
The water should now be safe to drink, but if the chlorine odor is too strong,
add a mixture of 1/2 cup baking soda and a gallon of fresh water to the
potable water tank and repeat the potable water flush.

Troubleshooting
15
WARNING
Before troubleshooting or attempting to service, read the following safety rules to avoid risk of
electric shock.
Before attempting to service the pump:
1. Personal
protective
equipment
Wear personal protective equipment while servicing your pump.
2. Review
troubleshoot-
ing table
Review the troubleshooting table below for the type of problem you are
experiencing. However, DO NOT attempt to repair until the steps listed
below are followed.
3. Empty and
flush
Empty the pump system and flush the pump system with potable water as
directed in the Storage section, removing from storage.
4. Disconnect
power/relieve
pressure
Disconnect power to the pump and be sure all system pressure is relieved.
5. Perform
repairs
Follow the directions provided in the troubleshooting table to repair the
pump.
6. Test after
servicing
After servicing, ALWAYS test the pump for leaks with potable water before
using.

Troubleshooting (continued)
16
PROBLEM
CAUSE
SOLUTION
Pump will not turn on
Bad electrical connection
Check battery connections
Short in wires
Check condition of wires
Fuse blown (if applicable)
Replace fuse
Locked drive
Replace pump
Faulty pressure switch
Replace pump
Incorrect voltage
Check voltage (±10%)
Pump will not prime
Out of potable water
Refill potable water tank
Inlet air leak
Tighten hose clamps/Replace pump
Inlet/Outlet tube restriction
Remove restriction
Clogged intake valves
Remove obstruction
Clogged intake tube
Remove obstruction
Low pressure/flow
Inlet air leak
Tighten hose clamps/Replace pump
Worn diaphragm
Replace pump
Worn valves
Replace pump
Inlet/Outlet tube restriction
Remove restriction
Incorrect voltage
Check voltage (±10%)
Clogged intake valves
Remove obstruction
Clogged intake tube
Remove obstruction
Pump leaks
Loose fasteners
Tighten fasteners
Pump seals degraded
Replace pump
Leak in diaphragm
Replace pump
Pump starts with
faucets closed
Leak in the system
Tighten leaking hose clamps/fittings
Faulty pressure switch
Replace pump
Air trapped in system
Purge the air from the system
Rough operation
Flexible mounting surface
Mount pump on rigid surface
Loose pump head
Tighten fasteners
Compressed base feet
Decompress base feet
Rigid plumbing
Plumb pump with flexible plumbing

Specifications
17
The noise emissions from this product do not exceed 70 dB(A).
The manufacturer reserves the right to make improvements in design and/or changes in specifications at any time
without incurring any obligation to install them on units previously sold.
Any Questions, Comments, Problems, or Parts Orders
Call NorthStar Product Support 1-800-270-0810
Item
number
Electrical
connection
Maximum
amp draw
Maximum
flow
Maximum
pressure
Ports
Overall dimensions
Weight
157102
12 Vdc
9.5 Amps
2.0 GPM
[7.6 LPM]
60 PSI
[4.1 bar]
3/4" QC
8.25" x 4.16" x 4.0"
[209.4mm x 105.6mm x
101.6mm]
4.0 lbs.
[1.8 kg]
157103
12 Vdc
9.5 Amps
3.0 GPM
[11.3 LPM]
55 PSI
[3.8 bar]
1/2" NPS-M
8.26" x 4.92" x 4.4"
[209.9mm x 125mm x
110.5mm]
4.4 lbs.
[2.0 kg]
157104
12 Vdc
16 Amps
5.0 GPM
[18.9 LPM]
55 PSI
[3.8 bar]
1/2" NPS-M
9.25" x 4.92" x 4.4"
[234.9mm x 125mm x
110.5mm]
5.1 lbs.
[2.3 kg]
157102

Specifications
18
157103
157104

Accessories
19
Part#
Description
Included with Model
Qty
157107
RV Quick Connect x ½"Hose Barb, Straight
157102
2
157110
RV Swivel x ½"Hose Barb, Straight
157103 & 157104
2
157105
Inlet Strainer w/ Quick Connect Ports, 50 mesh
157102
1
157106
Inlet Strainer w/ ½" Threaded Ports, 50 mesh
157103 & 157104
1
*Additional RV fittings are listed below along with compatible models.
Call Northstar Product Support at 1-800-270-0810 to order.
Part#
Description
Compatible with Model
157109
RV Quick Connect x ½"Hose Barb, Elbow
157102
157112
RV Swivel x ½"Hose Barb, Elbow
157103 & 157104
#157107
#157109
#157105
#157110
#157112
#157106

Exploded View –157102 –Rev A
20
1
2
3
FIG.06681
Ref #
Part #
Description
Qty
1
801452
Pressure switch assembly
1
2
A157102
Complete pump head assembly
1
3
789952
Motor assembly, 2060R
1