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AquaMaster®PRO Owner’s Manual 4/13/2010 2
10 Year Limited Warranty
To Whom Warranty Is Extended
This warranty is issued to the original owner at the original
location site and is not transferable to other sites or to
subsequent owners of the system.
Coverage
This limited warranty covers the AquaMaster®PRO system
delivered to the original owner at the original location when the
system is purchased for personal, family, or household use. It is
intended to cover defects occurring in workmanship or materials
or both.
Warrantor’s Performance and Length of Limited Warranty
AquaMaster®PRO warrants that upon receipt from the original
owner of any mechanical or electronic part which is found to be
defective in materials or workmanship, AquaMaster®PRO will
repair or replace the defective item for 3 years from date of
original installation. Media is not warranted.
AquaMaster®PRO further warrants that upon receipt from the
original owner of any AquaMaster®PRO media tank/valve
body, brine cabinet, found to be defective in material or
workmanship, AquaMaster®PRO will repair or replace the
defective item for 10 years from date of original installation.
All defective parts must be returned, along with the equipment
serial number and date of original installation, to
AquaMaster®PRO PREPAID, and replacement parts will be
returned by AquaMaster®PRO to the original owner FREIGHT
COLLECT.
Further Exclusions and Limitations on Warranty
THERE ARE NO WARRANTIES OTHER THANTHOSE
DESCRIBED IN THIS WARRANTY INSTRUMENT.
This warranty does not cover any service call or labor costs
incurred with respect to the removal and replacement of any
defective part or parts. AquaMaster®PRO will not be liable for,
nor will it pay service call or labor charges incurred or expended
with respect to this warranty.
In the event the water supply being processed through this
product contains sand, bacterial iron, algae, sulphur, tannins,
organic matter, or other unusual substances, then, unless the
system is represented as being capable of handling these
substances in the system specifications, other special treatment
of the water supply must be used to remove these substances
before they enter this product. Otherwise, AquaMaster®PRO
shall have no obligations under this warranty.
This warranty does not cover damage to a part or parts of the
system from causes such as fire, accidents, freezing, or
unreasonable use, abuse, or neglect by the owner.
This warranty does not cover damage to a part or parts of the
system resulting from improper installation. All plumbing and
electrical connections should be made in accordance with all
local codes and the installation instructions provided with the
system. The warranty does not cover damage resulting from use
with inadequate or defective plumbing; inadequate or defective
water supply or pressure; inadequate or defective house wiring;
improper voltage, electrical service, or electrical connections; or
violation of applicable building, plumbing, or electrical codes
laws, ordinances, or regulations.
THIS WARRANTY DOES NOT COVER INCIDENTAL,
CONSEQUENTIAL, OR SECONDARY DAMAGES.
ANY IMPLIED WARRANTIES ON THE PRODUCT
DESCRIBED IN THIS WARRANTY WILL NOT BE EFFECTIVE
AFTER THE EXPIRATION OF THIS WARRANTY.
No dealer, agent, representative or other person is authorized to
extend or expand this limited warranty.
Claims Procedures
Any defects covered by this warranty should be promptly
reported to:
AquaMaster®PRO
4343 South Hamilton Road
Groveport, Ohio 43125, USA
When writing about the defects, please provide the original
owner’s name, telephone number, and original address, serial
number and model number of the product, and date of
purchase. (This information should be listed in General
Information at the front of this manual.) AquaMaster®PRO
reserves the right to replace defective parts with exact
duplicates or their equivalent.
Call the HelpLine, 1-800-437-8993, for Return Information
from 8 a.m. to 5 p.m. EST. The HelpLine fax number is
[phone].

Contents
General Information.......................................................................................................................................4
Getting Maximum Efficiency from the Appliance............................................................................................5
Checklist Before Installation...........................................................................................................................6
Precautions....................................................................................................................................................7
Installation Steps............................................................................................................................................8
Start-Up Procedures—AMP50, AMP51, and AMP55...................................................................................15
Four-Button Controller for Softeners............................................................................................................16
Setting the Controller for Softeners..............................................................................................................18
Advanced Customer Settings for Softeners.................................................................................................19
Start-Up Procedures—AMP51NF Acid Neutralizing Filter............................................................................21
Start-Up Procedures—AMP51IF Iron Filter..................................................................................................22
Setting the Controller for Filters....................................................................................................................25
AMP51NF Acid Neutralizing Filter Replenishment Procedure......................................................................26
Assembly and Parts.....................................................................................................................................28
Troubleshooting...........................................................................................................................................36
Specifications...............................................................................................................................................38
Efficiency Statements...................................................................................................................................39
AquaMaster®PRO Owner’s Manual 4/13/2010 3

General InformationGeneral Information
Congratulations on choosing a superior AquaMaster PRO water treatment appliance! Soon you
and your family will be enjoying clean, clear water. Use this guide to attain the maximum benefit
from your appliance. Keep it handy for a reference guide and service log. If you have trouble with
the operation of your appliance, see Troubleshooting in the back of this manual or contact the
HelpLine: 1-800-437-8993 from 8 a.m. to 5 p.m. EST. The HelpLine fax number is [phone].
®
The HelpLine is available to answer questions about specific water problems, appliance installation,
and operation. When calling the HelpLine, please have this guide and the serial number of your
appliance available.
AquaMaster PRO
4343 S. Hamilton Rd.
Groveport, OH 43125, USA
[phone]
Fax: [phone]
®
Warning: This appliance must be applied to potable water only.
Note: The manufacturer reserves the right to make specification and product changes without prior notice.
This manual is for installation, operation, and maintenance of the following water conditioning appliance
models:
AquaMaster®PRO AMP50 AquaMaster®PRO AMP51IF
AquaMaster®PRO AMP51 AquaMaster®PRO AMP51NF
AquaMaster®PRO AMP55
For Owner’s Reference
Date of Installation:
Model Number:
Serial Number*:
Hardness:
Iron:
pH:
Water Pressure:
Water Temp:
Returned Warranty Card Date†:
*The serial number is located on the valve body in front of the bypass.
†Completely fill out the Warranty Card and return it by mail to ensure that the appliance is registered with the factory and the warranty
becomes validated.
AquaMaster®PRO Owner’s Manual 4/13/2010 4

AquaMaster®PRO Owner’s Manual 4/13/2010 5
Getting Maximum Efficiency from the Appliance
To achieve the maximum benefit and performance
from this appliance, familiarize yourself with this
manual and the appliance.
1. The salt level should always be at least 1/3
full. Refill the salt when the level drops
below the water level in the brine cabinet. A
resin cleaner can be used on a monthly
basis. A clean pellet, solar, or cube-type
salt is recommended. Do not use rock salt.
Caution: Do not mix different types of salt.
2. You may switch to a salt substitute (such
as potassium chloride) in place of water
conditioner salt at any time. If potassium
chloride is used in place of salt, increase
your hardness setting by 12% (multiply by
1.12). See Setting the Controller for
Softeners.
Caution: Do not use potassium chloride if
there is iron and/or manganese in the
water.
3. Should your electricity be off for any
reason, check your controller for the correct
time and reset as necessary (See
Advanced Customer Settings for Softeners
and Setting the Controller for Filters).
4. Program the appliance to regenerate at a
time when the water is not being used. If
there is more than one appliance, allow two
hours between each regeneration.
5. If your appliance runs out of salt:
A. Open the salt lid and add salt.
B. Wait two hours, then press and hold
the Regenerate button for 5 seconds.
6. If dirt, sand, or large particles are present in
the water supply, the appropriate
AquaMaster®PRO filter can eliminate this
problem.
7. The appliance may be disinfected with
5.25% sodium hypochlorite, which is the
active ingredient in household chlorine
bleach. To disinfect the appliance, add 4.0
fluid ounces (0.12 liters) of chlorine bleach
solution to the brine well of the brine
cabinet. The brine cabinet should have
water in it. Start a manual regeneration.
8. Protect the appliance, including the drain
line, from freezing.
9. The bypass valve (located on the main
control valve) enables you to bypass the
appliance if any work is being performed on
the appliance, well pump, or plumbing. Use
Bypass mode also for watering plants or
lawns with untreated water.
10. Before putting the appliance back in
service after work has been performed,
turn on the nearest cold water tap until
water runs clear.
11. Adhere to all operational, maintenance,
and placement requirements.
12. Inspect and clean the brine cabinet and air
check/draw tube assembly annually or
when sediment is present in the brine
cabinet.
13. Model AMP55 contains redox media and
activated carbon media. These have a
finite life and will eventually require
replacement if the advertised performance
capabilities of this device are to be
maintained.
14. Potassium permanganate will need to be
added periodically to any iron filter.
15. Models AMP50, AMP51, and AMP55 are
certified for barium and radium 226/228
reduction according to NSF/ANSI Standard
44. Any bypass system must be completely
in the Service position to ensure maximum
barium and radium 226/228 reduction.

Checklist Before Installation
Refer to this checklist before installation.
Water Quality—If the water supply contains sand, sulfur, bacteria, iron bacteria, tannins, algae, oil, acid, or
other unusual substances, consider pre-treating the water to remove these contaminants before the water
supply enters the appliance, unless the appliance is represented as being capable of treating these
contaminants in its specifications.
The appropriate AquaMaster PRO
®Water Filter can address these water shortcomings.‡
AquaMaster®PRO AMP51NF—Adjusts low pH water to a non-corrosive state.
AquaMaster®PRO AMP51IF—Reduces iron, hydrogen sulfide, and iron bacteria.
Iron—A common problem found in many water supplies is iron. It is important to know what type of and how
much iron is in the water supply.
Iron Type Description
Ferrous Iron§
(sometimes called clear
water or dissolved iron) Only type of iron that can be treated with a water softener
Ferric Iron Insoluble and the particles can eventually foul a resin bed. It should be filtered out before
the water reaches the softener
Organic Iron or Bacterial
Iron Attached to other organic compounds in the water. Additional treatment is needed to remove this type of iron
Colloidal Iron Not dissolved, yet stays in suspension. A softener cannot remove this type of iron
Water Characteristics—The AMP50, AMP51, and AMP55 Water Softeners require a pH of 7 or above to
function properly. An iron test to determine iron levels is also necessary. The AMP51NF Acid Neutralizing Filter
adjusts pH levels of 6.3 or above.
Water Hardness—Double check hardness of water with test strips, if provided, to verify that your appliance is
right for the job.
Model AMP50 will condition water for up to 70 grains of hardness per gallon (1,197 mg/L).
Model AMP51 will condition water for up to 90 grains of hardness per gallon (1,539 mg/L).
(See Specifications.)
Model AMP55 is FOR MUNICIPALLY-SUPPLIED WATER without iron. Model AMP55 will condition
water up to 35 grains of hardness per gallon (599 mg/L).
Water Pressure—Not less than 20 psi (1.4 bar) or greater than 120 psi (8.4 bar) constant. If water pressure
exceeds 70 psi (4.8 bar), a pressure regulator is recommended.**
Water Supply Flow Rate—A minimum of 2.4 gallons (9 liters) for the AMP50 and AMP51 models to 3 gallons
(11.4 liters) for the AMP55 model per minute or equal to the backwash flow rate of the particular model is
recommended. For the purposes of plumbing sizing, only the rated service flow rate and corresponding
pressure loss may be used. Prolonged operation of a water conditioner at flow rates exceeding the tested
service flow rate may compromise performance.
‡Not NSF Certified
§If the water supply contains ferrous iron, a commercially available resin bed cleaner should be used every six months. Follow the
instructions on the container. You should also increase your water hardness setting by 5 grains per gallon (86 mg/L) for every 1 ppm
(1 mg/L) of ferrous iron.
** Applies to US plumbing codes. Check the plumbing codes of your country.
AquaMaster®PRO Owner’s Manual 4/13/2010 6

Checklist Before Installation, Cont.
Water Temperature—Not less than 40°F (6°C) or greater than 120°F (49°C).
Drain—Drain the appliance to an appropriate drain, such as a floor drain or washer drain that will comply with
all applicable plumbing codes. To prevent back-siphoning, provide an adequate air gap or a siphon break. See
Installation Steps.
Electricity—Check the transformer to ensure it is appropriate for your country.
Precautions
Do 1. Comply with all applicable building, plumbing, and electrical codes.
2. Test your water quality with the strips provided. Optionally, obtain a report on your water’s quality.
3. Install the appliance before the water heater.
4. Install the appliance after the pressure tank on well-water installations.
5. Examine the inlet line from the pressure tank to appliance on well water with iron (recommended
minimum inlet pipe size 3/4-inch (19-mm) I.D. On municipal water, recommended minimum inlet pipe
size is 1/2-inch (13 mm) I.D.
6. Install a pressure-reducing valve if the inlet pressure exceeds 70 psi (4.8 bar).††
7. Install a gravity drain on the cabinet.
8. Secure the drain line on the appliance and at the drain outlet. See Installation Steps.
9. Allow a minimum of 8 to 10 feet (2.4 to 3.0 m) of 3/4-inch (19-mm) pipe from the outlet of the appliance
to the inlet of the water heater.
Do Not
1. Do not install if checklist items are not satisfactory. See Checklist Before Installation.
2. Do not install if the incoming or outlet piping water temperature exceeds 120°F (49°C).
3. Do not allow soldering torch heat to be transferred to valve components or plastic parts when using the
optional copper adapters.
4. Do not overtighten the plastic fittings.
5. Do not plumb the appliance against a wall that would prohibit access to plumbing. See Installation
Steps.
6. Do not install the appliance backward. Follow the arrows on the inlet and outlet.
7. Do not plug the transformer into an outlet that is activated by an On/Off switch.
8. Do not connect the drain and the overflow (gravity drain) lines together.
9. Do not use to treat water that is microbiologically unsafe or of unknown quality without adequate
disinfection before or after the appliance.
10. Do not allow your appliance or drain line to freeze.
†† Applies to US plumbing codes. Check the plumbing codes of your country.
AquaMaster®PRO Owner’s Manual 4/13/2010 7

Installation Steps
The water softener is capable of treating a combination of undesirable constituents (such as iron, dirt, sediment,
chlorine, and/or lead)‡‡ in water. See Specifications for the capabilities of your appliance. Install, set up, and
use the appliance within the operating limits outlined in this manual. Failure to comply with these specifications
may decrease the effectiveness of the backwash and cause control valve malfunction. The water softener, like
any other appliance, requires correct installation and setting for optimum performance.
Each water treatment appliance includes water test strips, eight feet of drain line, and a drain fitting.
Step 1 Prepare the Placement Area
A. Make sure the placement area is clean.
B. Turn off the electricity and water supply to the water heater. For gas water heaters, turn the
gas cock to “Pilot.”
C. Examine the inlet plumbing to ensure that the pipe is not plugged with lime, iron, or any other
substance. Clean or replace plugged plumbing.
Note: A minimum 3/4-inch (19-mm) pipe is required between the pressure tank and the
appliance for the appliance to function properly.
D. Make sure the inlet/outlet and drain connections meet the applicable plumbing codes.
E. Check the arrows on the bypass valve to ensure that the water flows in the proper direction.
See Bypass Valve.
Caution: Do not plumb the appliance in backward.
F. Place the appliance in the desired location using Figure 1 as a guide. The diagram in
Figure 1 applies to basement, slab, crawl space, and outside installations.
Figure 1: Appliance Placement
‡‡ Not NSF Certified
AquaMaster®PRO Owner’s Manual 4/13/2010 8

AquaMaster®PRO Owner’s Manual 4/13/2010 9
Installation Steps, Cont.
G. For most installations, install the appliance after the pressure tank and any water filter
appliance or water meter and before the water heater unless otherwise recommended. When
installing a carbon filter for well water, place the filter after any water conditioning appliance
unless otherwise recommended. Contact the HelpLine for further assistance in determining
the proper installation sequence.
Water Heaters: If less than 10 feet (3.0 m) of pipe connects the water treatment appliance(s)
to the water heater, install a check valve between the water treatment appliance and the
water heater as close to the water heater as possible. Ensure that the water heater has an
adequately rated temperature and pressure safety relief valve.
H. For outside installations, the appliance should be enclosed so it is protected from the
weather.
Step 2 Test Your Water
A. Remove any packaging or installation materials from the brine cabinet.
B. Contact your water treatment specialist or obtain a report on your water’s quality. Optionally,
use the test strips provided.
Step 3 Turn Off Water Supply
A. Turn off the water supply.
B. Open the hot and cold water taps to depressurize the lines.
Step 4 Connect Water Lines
Qest fittings are provided to facilitate installation, but their
use is not required. Be sure to read the Plastic
(PVC/CPVC) Pipe Joining Procedure, if using PVC/CPVC.
Step 4A: Using Qest Fittings
A. Lift and remove the valve cover.
B. Install Qest fittings. Qest connection fittings are
provided with your appliance. Qest fittings provide a
convenient, easy-to-use three-piece assembly for
3/4-inch copper plumbing or 3/4-inch CTS CPVC
plastic tubing (copper is shown in Figure 2). Ensure
that the three components (1: collar, 2: metal retaining
ring, and 3: nylon sleeve) are correctly installed in
sequence on the pipe. (See Figure 2.)
Note: No Teflon tape or plumber’s putty is necessary.
It should NOT be used with Qest fittings.
Figure 2: Qest Fittings
C. Attach the water lines to the appliance in compliance
with all applicable building, plumbing, and electrical
codes. (See Figure 3.) Do NOT overtighten the
connections on the plastic threads. Figure 3: Connect Water Lines.
Note the Bypass Valve.
D. Check the arrows on the bypass valve to ensure that
the water flows in the proper direction.
Caution: Do NOT plumb your appliance in
backward.

Installation Steps, Cont.
Step 4B: (Optional) Hard Plumbing With Copper
Fittings
When preparing the male threaded fittings of the I/O
adapter, use the following guidelines to avoid damage to the
plastic pipe threads.
A. Wrap the threads three times with 1/2-inch (2.5-cm) wide
Teflon tape. Place each consecutive wrap on top of the
previous wrap.
B. To prevent tearing of the tape, use Teflon paste on the
first two male threads only. The paste lubricates the tape
and fills the small void areas that might exist between the
threads. When the joint is complete, there will be a small
bead of sealant at the fitting interface, which indicates a
properly joined connection.
Teflon Tape
Figure 4: Plumbing Connections
C. Use a union with a threaded connection to facilitate repair of potential leaks in soldered
joints.
D. Prepare the copper tail assemblies in advance to enable them to cool prior to final assembly.
Advance preparation and cooling will prevent heat damage to the plastic pipe threads of the
adapter.
E. Ensure that the copper tube is at least 4 inch (10 cm) long.
F. Turn the fitting counterclockwise until you feel the threads engage and then tighten to
prevent cross threading. Do NOT overtighten the fittings.
Caution: Do NOT allow heat from the torch to transfer to the plastic valve component,
which could be damaged.
AquaMaster®PRO Owner’s Manual 4/13/2010 10

Installation Steps, Cont.
Plastic (PVC/CPVC) Pipe Joining Procedure
To ensure reliable joint integrity when using solvent cement for PVC/CPVC plumbing, follow
these recommendations:
A. Cutting—The pipe must be cut square to allow for the proper interfacing of the pipe end and
the fitting socket bottom. Use a wheel cutter, miter saw, or a ratchet shear for best results.
B. Deburring and Beveling—Use a knife, plastic pipe deburring tool, or a file to remove burrs
from the end of the pipe. Be sure to remove all burrs from the inside as well as the outside of
the pipe. All pipe ends should be beveled to permit easier insertion of the pipe into the fitting.
Failure to bevel the pipe end may cause a “wiping” effect in the fitting where the cement is
forced to the end of the fitting socket. This creates a weak joint.
C. Test Dry Fit of the Joint—Tapered fitting sockets are designed so that an interference fit
should occur when the pipe is inserted about one-third to two-thirds of the way into the
socket. Occasionally, when pipe and fitting dimensions are at the tolerance extremes, it will
be possible to fully insert dry pipe to the bottom of the fitting socket. When this happens, a
sufficient quantity of cement must be applied to the joint to fill the gap between the pipe and
fitting.
D. Inspection, Cleaning, and Priming—Inspect the inside of the pipe and fitting sockets and
remove dirt, grease, or moisture with a clean dry cloth. If wiping fails to clean the surfaces,
use a chemical cleaner. Check for possible damage such as splits or cracks and replace if
necessary. Use purple primer to penetrate and soften the bonding surfaces of the PVC or
CPVC pipe and fittings. Proceed without hesitation to the cementing procedure while the
primed surfaces are still wet.
E. Application of Solvent Cement—Apply the solvent cement evenly and quickly around the
outside of the pipe while the primer is still wet. Apply a light coat of cement evenly around the
inside of the fitting socket. Do not allow excess cement to “puddle” in the fitting. Apply a
second coat of cement to the pipe end.
F. Joint Assembly—Working quickly, insert the pipe into the fitting socket and give a 1/4-turn
of the pipe or fitting while pushing toward the fitting stop. This action will evenly distribute the
cement. Do NOT continue to rotate the pipe or fitting after the stop has been reached. Hold
the joint tightly together for about 15 seconds to prevent the pipe from “creeping” out of the
fitting. A good joint will have sufficient cement to make a small bead all the way around the
outside of the fitting hub. The joint should not be disturbed immediately after the cementing
procedure. Allow adequate time for the joint to cure properly. Exact drying time is hard to
predict because of environmental variables. Follow the recommended joint curing times on
the primer and cement container labels.
AquaMaster®PRO Owner’s Manual 4/13/2010 11

AquaMaster®PRO Owner’s Manual 4/13/2010 12
Installation Steps, Cont.
Step 5 Connect Gravity Overflow Connection
The overflow line drains away excess water should the tank fill
with too much water or the appliance malfunction.
A. Attach the overflow elbow and check that it is in the down
position. (See Figure 5.)
B. Connect 1/2-inch (13-mm) I.D. tubing (size cannot be
reduced) between the overflow fitting and a suitable floor
drain, laundry tub, or other suitable waste receptor. This
tubing is not supplied with the appliance. Ensure that the
overflow line ends at a drain that is at least 3 inches (8 cm)
lower than the bottom of the overflow fitting. Maintain a
minimum of 5 cm (50 mm) air gap. The gravity line cannot be
run overhead. Figure 5: Gravity Overflow
Connection
Step 6 Connect Drain Line
The drain line carries away the backwash water as part of the
regeneration cycle.
A. Connect the drain line to the drain end cap (See Figure 6)
with a minimum 1/2-inch (13-mm) I.D. tubing (supplied). The
size cannot be reduced.
B. Route the drain line to a floor drain, laundry tub, or other
suitable waste receptor. Maintain a minimum 2-inch (5-cm)
air gap between the drain line and the flood level rim of the
waste receptor to prevent back-siphoning. This drain line
should make the shortest run to the suitable drain. Figure 6: Connect Drain
Line
C. The drain line may be elevated up to 8 feet (2.4 m) from the
discharge on the appliance as long as the water pressure in
your system is 40 psi (2.8 bar) or more.
D. If the drain line is 25 feet (7.6 m) or longer, increase the drain line to 3/4-inch (19-mm) I.D.
The end of the drain line must be equal to or lower in height than the control valve.
Caution: The drain line must not be kinked, crimped, or restricted in any way.

Installation Steps, Cont.
Step 7 Flush Lines
A. If your appliance is equipped with a bypass, place the
appliance in the Bypass position. (See Figure 7.)
B. Turn on the main water supply.
C. Open the nearest cold water faucet to flush the plumbing of
any excess soldering flux, air, or any other foreign material.
D. Return the appliance to Service mode.
Note: To prevent untreated water from entering your home,
remember to not use water inside your home when the
appliance is in Bypass mode. Remember to return the
appliance to Service mode when you have finished using
untreated water.
Step 8 Check for Leaks
A. Close all faucets.
B. Check all lines and connections for leaks. If leaks are found:
1. Turn off the main water supply.
2. Open a cold water faucet to depressurize the lines.
3. Close the faucet to eliminate any siphoning action.
4. Repair all leaks.
5. Turn on the main water supply.
6. If your appliance is equipped with a bypass, place the
appliance in the Service position to slowly fill the media
tank. (See Figure 8.)
7. Open a cold water faucet to purge air out of the
media tank.
8. Close the faucet and recheck for leaks.
Figure 7: Bypass Position
Figure 8: Service Position
AquaMaster®PRO Owner’s Manual 4/13/2010 13

Installation Steps, Cont.
Bypass Valve
Your appliance is equipped with a bypass valve. The bypass valve can isolate the appliance should the
appliance malfunction or leak. It can also permit the use of untreated water for watering plants, shrubs, or
lawns.
The bypass is located on the main control valve. To engage the bypass, turn the knob to the Bypass position.
The appliance will be bypassed and all water to the home is raw, untreated water. To prevent untreated water
from entering the home, water should not be used inside the home when the appliance is in Bypass mode.
Ensure that the appliance is returned to Service mode when the appliance is repaired or the use of untreated
water is complete by turning the knob to Service.
To blend hardness back into the water using the bypass, turn the knob slightly from the Service position toward
the Bypass position.
Figure 9: Bypass Valve
Next Step
The next step is Start Up. Start-up procedures are provided for each of the following units
AquaMaster®PRO Water Softeners AMP50, AMP51, and AMP55 (See page 15.)
AquaMaster®PRO AMP51NF Acid Neutralizing Filter (See page 21.)
AquaMaster®PRO AMP51IF Iron Filter (See page 22.)
Be sure to follow the Start-Up Procedure for your specific appliance.
AquaMaster®PRO Owner’s Manual 4/13/2010 14

AquaMaster®PRO Owner’s Manual 4/13/2010 15
Start-Up Procedures—AMP50, AMP51, and AMP55
Step 1 Plug in the Transformer
A. Connect the transformer power cord to the back of
the controller. (See Figure 10.)
B. Plug the transformer into an appropriate outlet.
C. Ensure that the outlet selected is NOT operated by
an On/Off switch.
Step 2 Set Up the Controller
A. Program the appliance controller. See Setting the
Controller for Softeners. Figure 10: Connect Power Cord
Step 3 Add Water to the Brine Cabinet
A. Add 2 gallons (7.6 liters) of water to the brine cabinet. After the first regeneration, the
appliance will automatically refill the correct amount of water into the brine cabinet.
B. Ensure the appliance is in Service position and your water supply is turned on.
C. Initiate a manual regeneration (see Setting the Controller for Softeners) and inspect for
proper operation. Allow the appliance to draw water out of the brine cabinet until the air
check/draw tube sets (8–10 minutes).
D. Press the Regenerate button to advance to the Brine Refill (04) position. Let the tank fill with
the proper amount of water. The controller will then step the valve to the Home position.
Note: This initial startup is the only time you will add water to the brine cabinet. Do not add
water at any other time.
Step 4 Fill the Brine Cabinet With Salt
A. Fill the brine cabinet with salt. Use clean, white pellet or solar salt. Do not mix pellet with
solar salt.
Note: Always keep the salt level above the water level. For convenience, completely fill the
tank when refilling with salt.
B. After you add salt, including adding it after the tank has run out of salt, wait two hours for
saturated brine before starting any regeneration.
Caution: Use of potassium chloride when iron and/or manganese are present in the raw
water supply is not recommended.
Step 5 Complete the Installation
A. Ensure that the bypass valve is in the Service position. See Figure 8.
B. Ensure the water supply is on.
C. Turn on the electricity and water supply to the water heater. For gas water heaters, return the
gas cock to “On.”
D. Open a cold water tap and allow the appliance to flush for 20 minutes or until approximately
72 gallons (273 liters) have passed through the appliance. This procedure is required to
meet NSF requirements. Verify the flow rate on the controller, which indicates water flow.
See Figure 11.
E. Place the cover on the cabinet.

Four-Button Controller for Softeners
Note: If you have an AMP51NF or AMP51IF water filter, see Setting
the Controller for Filters.
This appliance features a four-button controller with an LCD display.
The controller can be used to view the appliance’s status, perform
regenerations, and change settings. The controller must be set up
correctly for the appliance to perform properly.
Note: Ensure that the bottom of the controller is firmly locked onto
the four tabs on the top of the drive end cap assembly. See Cabinet
and Cover Assemblies diagram later in this manual.
Figure 11: Four-Button Controller
Controller Part Function
LCD Display Shows the status of the controller
Demand Mode The controller measures water usage and regenerates based on need, so you do not have to worry
about vacation settings or extra guests. The appliance will regenerate using only the necessary
amount of water and salt. If your power has been off, the appliance will retain programmed settings
indefinitely
Note: You should not need to change from Demand Mode
Soft Water
Remaining Gallons
x 100 or Liters x
100 (or 1000)
Shows the gallons (or liters) of soft water remaining until the next automatic regeneration. Typically,
each person in the household uses about 75 gallons (284 liters) per day. Water remaining is in
gallons in hundreds or liters in hundreds or thousands, depending on how much capacity is
remaining.
For example: 88 = 8,800 gallons (33=3,300 or 33,000 liters)
Recharge/
Regeneration
Status
Shows regeneration cycle numbers during regeneration. The read-out will flash with the cycle
number. The flashing regeneration numbers are:
First cycle (01) First Backwash
Second and Third cycles (02) Brine/Slow Rinse
Fourth cycle (03) Second Backwash
Fifth cycle (04) Brine Refill
Sixth cycle (HO) Service (Briefly)
When regeneration is complete, the display shows the number of gallons or liters in hundreds of
soft water remaining. (See above) Regeneration typically is complete in about 30 minutes.
waterMizerTM Indicates that water is flowing through the appliance; the waterMizerTM indicator turns whenever
water is being used; useful for checking for proper plumbing and leaks
Note: The waterMizerTM indicates water flow for softeners only.
powerClean™ Displays when feature is activated. See Power Clean Button
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Four-Button Controller, Cont.
Button Function
Set Used to set Customer Settings
Change Used to change Customer Settings
Power Clean Activates/deactivates the powerClean™ feature, which is a service/maintenance step for water
supplies that have an excessive amount of iron. “powerClean™” will display when this feature is
activated. The appliance will regenerate every other day with 5 lb (2.3 kg) of salt. Leave the
powerClean™ feature on for a minimum of two weeks. The frequent regeneration will eliminate iron
buildup in the resin bed. The use of salt with an iron cleaning agent or iron out cleaner is
recommended for continuous use as a preventive measure against iron fouling of the resin bed.
Use this feature every six months as a part of your routine maintenance procedure to ensure a long
service life for your water treatment appliance
Regenerate Used when starting your water conditioner to start an immediate regeneration, or to restore
capacity if you run out of salt
To Start an Immediate Regeneration
1. Press and hold the Regenerate button for about five seconds.
2. The appliance is in regeneration mode and will display the status of each cycle.
3. After all regeneration cycles are complete, the display will return to normal operating mode.
To Quickly Advance Through the Regeneration Cycles
(used when starting up or diagnosing the appliance only)
1. Press and hold the Regenerate button for about five seconds until the cycle begins.
2. The cycle position will display (for example, 01).
3. After 20 seconds, press and hold the Regenerate button until the cycle number changes
(about 2 seconds).
Each cycle can be advanced by pressing the Regenerate button. Always wait until the cycle
position displays before advancing to the next cycle position.
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Setting the Controller for Softeners
Step 1 Determine the Controller Setting Number
A. For municipal water, call the water department to
determine the hardness and pH of your water supply.
B. For well water, use the hardness test strips provided
with your appliance or have a sample of your
untreated water tested by a water testing laboratory.
1. Test Strips—Follow the instructions on the test
strips. If the color on your test strip is
between two readings, use the higher number.
Compare the colors as soon as you remove them
from your water. This number gives the hardness
in grains per gallon and parts per million (mg/L).
2. If the pH is below seven, call the HelpLine listed
in General Information.
C. Use the following example to determine the controller
setting.
Figure 12: Hardness Test Strips
Your Water Example Metric Example
Enter hardness grains per gallon (mg/L) 20 342
If your water contains 3 ppm (3 mg/L) iron, add 258 (15)* + 15 + 258
The sum is your controller setting number 35 600**
* Increase your water hardness setting by 5 gpg (86 mg/L) for every ppm (1 mg/L) of ferrous iron.
** The hardness you enter is multiplied by 10, therefore you will enter “60” as the hardness setting.
Step 2 Enter Your Setting Number Into the Controller
Note: You cannot set the controller while the appliance is regenerating.
A. Press and hold the Set button for about 5 seconds.
B. Press the Change button until the display matches your compensated number.
C. Press Set to save the hardness setting number.
D. To recheck the hardness setting number, hold down the Set button for about 5 seconds.
Note: Refer to Specifications for the maximum water hardness that your appliance can
handle.
Your hardness number is now set in the controller.
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Advanced Customer Settings for Softeners
Most customers will want to use the factory default settings, so no changes are necessary. However, you can
reset the controller settings if the factory default settings are not suitable for your needs.
Note: Be sure to check that the Time of Day is correct.
Set High Capacity or High Efficiency
Your appliance can be programmed for High Capacity (HC) or High Efficiency (HE).
High Capacity means the appliance will regenerate less often, but use more salt.
High Efficiency will make the appliance regenerate more often and use less salt. This is the default. The
High Efficiency setting meets or exceeds the requirement some local codes have for salt efficiency.
To Enter Advanced Customer Settings Mode
A. Press the Set and Change buttons for 3 seconds. The display should show only the controller type.
After 3 seconds, the entire screen is lit for a half second, and then “HC” displays.
B. Press Change to toggle the digit display between “HC” and “HE.”
C. When the desired value is displayed, press Set.
Note: HE ensures the appliance chooses salt settings that get 4,000 grains per pound (570 grams/kg)
of salt for each regeneration or better. This choice meets or exceeds the requirement some local codes
currently have in regards to salt efficiency.
Note: All models are equipped with patented capacity guard.
Once you have set HC or HE, you can continue to set the rest of the advanced customer settings.
Step 1 Set Mode
Display reads “Demand Mode.”
To Change Mode
A. Press Change.
−Delay Mode allows regeneration at a specific time (for example, at 2 a.m. when less
water is typically being used).
−Demand Mode triggers a regeneration as soon as softening capacity is exhausted. This
is the default.
B. When the desired mode is displayed, press Set.
Step 2 Set 96 Hours Until Regeneration
Display reads “96 Hours.”
To Change Setting
A. Press Change to turn Off. If “96 Hours” is selected, the appliance will work no more than
4 days without a regeneration. Default is for “96 Hours” to be On.
Note: If there is iron in your water, select this option. If you are using model AMP55, turn this
option Off for most municipal water supplies.
B. When the desired setting is displayed, press Set.
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Advanced Customer Settings for Softeners, Cont.
Step 3 Set Gallons or Liters
Display reads “Gallons (or Liters) x 100 or 1000.”
To Set Gallons or Liters
A. Press Change to toggle between gallons and liters. Choosing “Gallons” sets the controller to
English units, and choosing “Liters” sets it to metric units.
B. When the desired units are displayed, press Set.
Step 4 Set Time Format
Display reads “12” if gallons were chosen or “24” if liters were chosen.
To Set Time Format
A. Press Change to toggle between 24 and 12. This controls the selection of a 12-hour
(AM/PM) or 24-hour clock. If 24-hour clock , 00=midnight.
B. When the desired time format is displayed, press Set.
Step 5 Set Time of Day
Display reads “Set Time” and “12” (or “24”).
To Change Time of Day
A. Press Change until the current time is displayed. Default is 12 PM.
Note: Set time to the nearest hour.
B. When the desired time is displayed, press Set.
Step 6 Set Regeneration Time
Display reads “Set Reg. Time” followed by the current regeneration time that is set (02).
To Change Regeneration Time
A. Press Change. Default is 2 AM.
B. When the desired regeneration time is displayed, press Set.
Note: Whenever you experience an electrical outage, check your controller for the correct time.
Make any necessary corrections.
Programming is now complete.
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