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AMTROL PRESSURISER
®
WATER PRESSURE BOOSTER SYSTEM
WITH GUARDIAN CP™ CONTROL
INSTALLATION & OPERATION INSTRUCTIONS
Models RP-10HP, RP-15HP and RP-25HP
NOTE: Inspect for shipping damage. Notify freight carrier or store where purchased immediately if damage is present. To avoid risk of personal injury
and property damage, if the product appears to be malfunctioning or shows signs of corrosion, call a qualified professional immediately. Current copies
of the product manual can be viewed at www.amtrol.com. Use proper safety equipment when installing.
THIS IS THE SAFETY ALERT SYMBOL. IT IS USED TO ALERT YOU TO POTENTIAL PERSONAL INJURY AND OTHER
HAZARDS. OBEY ALL SAFETY MESSAGES THAT FOLLOW THIS SYMBOL TO REDUCE THE RISK OF PERSONAL
INJURY AS WELL AS PROPERTY DAMAGE.
USE ONLY WITH POTABLE WATER SYSTEMS.
Do not operate in a setting with freezing
temperatures or where the temperature can exceed 200°F and do not
exceed the maximum working pressure specified for this Product.
READ CAREFULLY THE PRODUCT
INSTALLATION & OPERATION INSTRUCTIONS.
FAILURE TO FOLLOW THE INSTRUCTIONS AND WARNINGS MAY
RESULT IN SERIOUS OR FATAL INJURY AND/OR PROPERTY
DAMAGE, AND WILL VOID THE PRODUCT WARRANTY. THIS
PRODUCT MUST BE INSTALLED BY A QUALIFIED PROFESSIONAL.
FOLLOW ALL APPLICABLE LOCAL AND STATE CODES AND
REGULATIONS. IN THE ABSENCE OF SUCH CODES, FOLLOW THE
CURRENT EDITIONS OF THE NATIONAL PLUMBING CODE AND
NATIONAL ELECTRIC CODE, AS APPLICABLE.
This Product, like most Products under pressure,
may over time corrode, weaken and burst or
explode, causing serious or fatal injury, leaking or flooding and/or
property damage. To minimize risk, a licensed professional must install
and periodically inspect and service the Product. A drip pan connected to
an adequate drain must be installed if leaking or flooding could cause
property damage. Do not locate in an area where leaking could cause
property damage to the area adjacent to the appliance or to lower floors
of the structure.
CALIFORNIA PROPOSITION 65 WARNING! This product contains a
chemical known by the State of California to cause cancer and to cause
birth defects or other reproductive harm. (California Installer/Contractor
- California law requires that this notice be given to consumer/end user
of this product.) For more information: www.amtrol.com/prop65.html
temperatures in excess of 200°F. Do not adjust the pre-charge or
re-pressure this Product except during installation or regular inspection.
Replace the Product and do not adjust the precharge if corroded,
damaged or with diminished integrity. Adjustments to pre-charge must be
done at ambient temperature only. Failure to properly size the Product or
follow these instructions may result in excessive strain on the system and
may lead to Product failure, serious or fatal personal injury, leakage and/
or property damage.
working pressure designated in the Product Manual, whichever is less.
At least once every 3 years or if discharge is present, a licensed
contractor should inspect the temperature and pressure relief valve and
replace if corrosion is evident or the valve does not function. FAILURE
TO INSPECT THIS VALVE AS DIRECTED COULD RESULT IN
UNSAFE TEMPERATURE OR PRESSURE BUILD-UP WHICH CAN
RESULT IN PRODUCT FAILURE, SERIOUS INJURY OR DEATH AND/
OR SEVERE PROPERTY DAMAGE AND VOID THE PRODUCT
WARRANTY.
You should test for corrosive elements, acidity, total solids and other
relevant contaminants, including chlorine and treat your water appropriately
to insure satisfactory performance and prevent premature failure.
RUPTURE OR EXPLOSION HAZARD. Do not
expose Product to freezing temperatures or
A relief valve must be installed to prevent pressure
in excess of local code requirement or maximum
Chlorine & Aggressive Water: The water quality
can significantly influence the life of this Product.
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PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY
IMPORTANT GENERAL SAFETY INFORMATION -
ADDITIONAL SPECIFIC SAFETY ALERTS APPEAR IN THE FOLLOWING INSTRUCTIONS.
If the control is set too high or the pump is running
demand on the system, the pump will run continuously, can overheat
and become damaged, potentially resulting in product failure, leaking
and/or rupture.
codes, and in their absence, national codes must be followed to minimize
the risk of electric shock, property damage or personal injury.
will cause damage to the motor. The pump models RP-10HP, RP-15HP
and RP25-HP are pre-wired for 115 vac; however, they can be rewired to
be used with 230 vac. Consult motor nameplate for the wiring diagram.
visible and near the pump. Use a 20 amp circuit.
when the water supply is shut off and there is no
All wire and fuse sizings are preliminary
recommendations only. For your safety, local
The pump motor is designed for use with single
phase, 60Hz ac. Use with any other type of power
The power for your pump must be on a dedicated
circuit. In addition, a shut off switch should be
Sizing Chart
Amtrol
Pressuriser
Flow Rate
®
From City
Minimum
Supply
RP-10HP 10 gpm 10 psig
RP-15HP 15 gpm 10 psig 1" 1"
RP-25HP 25 gpm 10 psig 1 1/4" 1 1/4"
Metal piping must be used for all inlet and outlet lines to the unit.
Do not oversize pump. Inadequate water supply will result in
poor performance and pump damages.
Minimum
Flow Pressure
From City
Supply
Minimum
Incoming
Pipe Size
3
/4"
Water
Meter
3
/4"
Pre-Installation
• DONOTUSEFORPRE-HEATEDWATERSUPPLIES;
• DO NOT USE FOR ANYTHING EXCEPT COLD WATER
(AMBIENTTEMPERATURENOTTOEXCEED100°F);
• DO NOT USE IN SYSTEMS WHERE LOW PRESSURE IS
DUE TO LEAKS OR WHERE LEAKS IN THE PLUMBING
SYSTEMMAYEXIST;
• DONOTUSEINSYSTEMSWHERETHEWATERSUPPLY
CANDROPBELOW10PSIG;
• DO NOT USE IN SERIES WITH ANOTHER PUMP (SUCH
ASINPRIVATEWELLWATERSYSTEMS);
• DO NOT RE-PRESSURIZED TANK AFTER INITIAL
INSTALLATION;
• DO NOT PIPE EXCEPT WITH METAL PIPING AT INLET
AND OUTLETS.
The system must be placed indoors only on a solid level
surface with a drip pan piped to a drain with adequate capacity
for large volumes of water in the event the system ruptures or
fails. Consider the risks posed by tanks under pressure and the
potential for leaking and/or flooding damage in selecting the
location. The unit must not be placed in an environment that would
expose the water in the tank to temperatures below freezing or in
excess of 100° F.
Be sure to leave a minimal
clearance of 12” around
the unit for access should
field adjustments be
necessary in the future
and to permit maintenance
and inspection (Figure 1).
Figure 1
12"
Amtrol Pressuriser
®
Before attempting any service and disassembly,
disconnected prior to removing motor. Ensure power is disconnected
before cleaning is attempted.
should be completed by a licensed electrician, and in accordance with
local codes or in their absence, the National Electrical Code. Before
starting the wiring installation, disconnect all power to the circuit to be
used for the AMTROL Pressuriser®.
systems with a minimum pressure of 10 psig at all times, measured under
flow at the tap closest to the location of the AMTROL Pressuriser®
installation.
shut off power to the pump. Ensure power is
Grounding of the pump is essential for your
protection and the protection of the motor. All wiring
The AMTROL Pressuriser® should only be
connected to a municipal, cold water supply, and in
Installation
1. Remove protective air valve cap.
2. Check pre-charge pressure (pressure should be + or – 10% of
the factory setting). Factory pre-charge is 38 psig.
3. Release or add air as necessary to make the pre-charge
pressure 2 psig below the pressure switch pump cut-in setting.
4. Replace protective air valve cap. (Remove air valve label,
replace protective air valve cap, peel off backing of label and
apply on air valve cap.)
MINIMUM SUPPLY LINE AND METER SIZE FOR
THE RP-25HP IS 11/4". THIS APPLIES TO ALL LINES INCLUDING
THOSE USED WITH THE WATER METER OR FITTINGS BEFORE THE
PUMP. CONTACT FACTORY IF MINIMUM FITTING/LINE SIZE IS
BELOW THE ABOVE NUMBERS.
5. Install a SPRING LOADED CHECK VALVE in the city supply
line on the suction side of the pump along with a shut-off valve.
Failure to do so will result in premature failure of the AMTROL
Pressuriser due to excessive pump cycling.
6. Install a by-pass loop (Figure 2).
Figure 2
CITY
WATER
SUPPLY
SPRING
CHECK VALV E
7. Pipe the city supply after the shut-off valve to the suction side
of the pump, as shown.
8. Connect the house supply line using a 100 psig maximum relief
valve as shown (Figure 2). It is important that the pressure
relief valve be installed on the pump discharge prior to any
shut off valves.
THE RP-10HP IS 3/4", THE RP-15HP IS 1" AND
BYPASS
LOOP
SHUT-OFF
VALVES
FLOW
TO SYSTEM
FLOW
PRESSURE
RELIEF
VALV E
RP-10HP
RP-15HP
RP-25HP
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ELECTROCUTION HAZARD. DISCONNECT
SERVICING. THE GUARDIAN CP™ MUST BE ELECTRICALLY
GROUNDED.
ALL ELECTRICAL POWER BEFORE
The Guardian CP™ will operate on 115 vac & 230 vac systems.
9. Disconnect power and verify with a volt meter.
10. Determine the pump electrical requirements. If unknown,
contact the pump manufacturer.
11. Select the appropriate wire gauge per local codes and the
pump manufacturer’s recommendation. All pumps are 1/2
horsepower and are rated at 10.6 amps for 115 volts and 5.3
amps for 230 volts.
12. Loosen the captive fastener on the top of the controller and
remove the plastic cover, exposing the wire leads. (When
reassembling cover, do not over-tighten fastener.)
13. Following all electrical codes, wire the Guardian CP™ (Figure 3.)
The Guardian CP™ has openings to accept standard conduit
terminations.
DO NOT INSTALL ON ELECTRICAL SERVICE
RATED ABOVE 20 AMPS.
14. Close the bypass valve.
Figure 3
BASIC
GUARDIAN CP™
WIRING
Factory wiring to pump
Programming the Guardian CP
™
Differential pressure should be adjusted to no greater than
35 psi nor lower than 10 psi. The 20 psi factory differential is
recommended.
1. Press and hold . When LO appears, release. This will
determine the pressure at which the pump activates.
2. When number appears, tap or to change cut-in setting.
3. Press again. When HI appears, tap or to change cut-
out setting. This will determine the pressure at which the pump
shuts off.
4. Press a third time. The last Error Code in memory will
display (see Error Code table in Troubleshooting section). If
no errors have occurred, the display will show - -
5. After approximately 10 seconds Pr will appear, indicating the
settings are programmed. Display will then revert to the line
pressure.
NOTE: The settings will now be stored until changed manually,
even in the event of power failure.
NOTE: If pump cannot reach cut-out setting within 5 minutes with
no water running, lower the pressure settings to fall within the
pump’s pressure capabilities
Operation
ENSURE THE SWITCH IS OPERATING PROPERLY. AFTER MAKING
ANY ADJUSTMENTS, OBSERVE AT LEAST ONE PUMP CYCLE TO
VERIFY PROPER PUMP SHUT-OFF.
Please contact AMTROL Technical Support at 401-535-1216 or
an AMTROL representative if further assistance is required.
Winterizing: To drain, disconnect the pump from power and open
a faucet to bleed off water pressure. Lay the tank on its side to
disconnect the piping between the pump and tank to completely drain
the unit. Ensure exposed piping conected to unit is also drained.
White
White
L2
w/Black
P2
Black
L1
Blue
P1
15. Open the city water supply line valve and a faucet and check
the system for leaks, repair any leaks before proceeding.
16. Shut off the faucet and check the system for leaks. Repair any
leaks before proceeding.
IF THE CONTROL SWITCH IS SET TOO HIGH OR
SUPPLY IS SHUT OFF AND THERE IS NO DEMAND ON THE SYSTEM,
THE PUMP WILL POTENTIALLY RUN CONTINUOUSLY, CAN
OVERHEAT AND CAUSE DAMAGE; RESULTING IN PRODUCT
FAILURE, LEAKING AND/OR RUPTURE. TO REDUCE THIS RISK,
NEVER EXCEED 80 PSIG CUTOUT.
THE PUMP IS RUNNING WHEN THE WATER
Start-Up
BEFORE CONTINUING, ENSURE THAT ALL
GROUNDED. CHECK FOR OPEN DRAIN VALVES OR OTHER
SOURCES OF FLOODING BEFORE STARTING UNIT.
1. Prime pump if necessary and adjust tank precharge to
manufacturer’s recommendation for intended pressure range.
The factory Guardian CP setting is 40 psi cut-in and 60 psi
cut-out.
2. Turn on power and ensure Guardian CP display illuminates.
Display will blank momentarily and the pump will start. If not,
check installation.
3. The display will now read the current line pressure.
4. Allow the pump to reach the factory cut-off setting of 60 psi. IF
THE PUMP CANNOT REACH THIS SETTING, DISCONNECT
POWER AND SEE THE TROUBLESHOOTING SECTION.
5. Check for leaks and repair as necessary.
WIRING IS COMPLETED AND THE UNIT IS
DO NOT ADJUST PRESSURE OR
RE-PRESSURIZE THIS PRODUCT EXCEPT
FOR ANY ADJUSTMENTS MADE AT THE TIME OF INITIAL
INSTALLATION WHEN THE UNIT IS NEW. RE-PRESSURIZATION OF
A WEAKENED, DAMAGED, OR CORRODED UNIT CAN CAUSE AN
EXPLOSION, POSSIBLY CAUSING SERIOUS OR FATAL PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
If pressure adjustments are necessary because of changes in
inlet pressure, check the condition of the unit first to make sure
there is no corrosion of the tank or any connected lines or fittings.
Take appropriate precautions. Never adjust the pressure if water
is leaking from the air stem. Replace any damaged or corroded
tank. Also, air loss is an indication that damage, corrosion or
weakening of the unit may have occurred and it should not be
re-pressurized.
Maintenance
Your AMTROL Pressuriser unit, including the pump, must be
periodically inspected by an experienced professional for signs of
damage, corrosion and leaking. The pump should be checked to
ensure it is turning on and off at the appropriate cut-in and cut-out
points. At a minimum, after installation, a thorough inspection of
all components should take place annually. However, note that
units in settings with frequent use, where corrosion, high humidity
or aggressive water is more likely to occur, and as the unit ages,
should be inspected more frequently.
Warranty
Two (2) Year Limited Warranty
Visit www.amtrol.com for complete warranty details.
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Troubleshooting
The Guardian CP™ incorporates built-in diagnostics. If the AMTROL Pressuriser® is not functioning properly or is inoperable, look for
a error code (example E1) on the digital readout before proceeding. Error codes are listed in the table at the bottom of this page.
PROBLEM CAUSE SOLUTION
Pump will not start.
Pump runs but will
not build pressure.
Pump builds
pressure but will not
shut off.
Pump starts too often
(cycles under 30
sec.).
1. No Power.
2. Faulty wiring.
3. Damaged motor.
4. Damaged control.
1. Supply closed/blocked.
2. Bypass loop open.
3. Pump plumbed backwards.
4. Bad internal parts.
1. Operating pressure set too high.
2. Bad internal parts.
3. Control line blocked.
1. Control differential too narrow.
2. Tank precharge incorrect.
3. Waterlogged pressure tank.
1. Check circuit breaker and fuses, tighten connections.
2. Check wiring per installation diagram in this booklet. If pump hums,
but will not start, check pump motor wiring (115/230V).
3. If display illuminates with no error code, but pump will not start,
replace pump.
4. If power is present at L1/L2 but display is blank, replace control.
1. Open all supply valves, ensure check valve is not sticking, clean
any filters.
2. Close bypass valve.
3. Reverse inlet/outlet.
4. Check for bad seals or broken impeller. Repair or replace as
necessary.
1. Reduce control setting as necessary.
2. Check for bad seals or broken impeller. Repair or replace as
necessary.
3. Remove control line and blow compressed air to clear.
1. Set cut-in and cut-out 20 psi apart.
2. Set air pressure 2 psi below cut-in while pump is off and gauge
pressure is zero.
3. If water emerges from tank air stem when depressed, replace tank.
To reset control at any time, press buttons simultaneously for 5 seconds.
To "invert" the display for easier viewing, press together for 3 seconds.
CODE REASON ACTION CAUSE & REMEDY
E1
Rapid cycle
Excessive amp draw
E2 Low-suction
(running pressure)
below 10 PSI
Switch continues to operate.
Shuts off pump. Auto restart
after 60 min.
See “Pump Starts Too Often” above.
Have pump checked for proper operation.
1. Determine cause of low-suction.
2. Check Wiring.
3. Inspect pump.
E3 Improper voltage Shuts off pump. Restore voltage to proper range. Pump automatically
restarts with proper voltage.
THE GUARDIAN CP CONTROL CONTAINS NO SERVICEABLE PARTS. REMOVAL OF MAIN CIRCUIT BOARD COVER WILL
VOID WARRANTY.
LOW-LEAD
1400 Division Road, West Warwick, RI USA 02893
T: 800.426.8765 F: 800.293.1519
www.amtrol.com
© 2014 AMTROL Inc. Part #: 9040B140 (07/14)
Mark of the
Originator
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