Aquapure APUN101 User manual

INSTALLATION AND OPERATING
INSTRUCTIONS
APUN SERIES
UPFLOW ACID NEUTRALIZERS
MODELS:
APUN101
APUN201
APUN301
APUN100-LM
APUN200-LM
INSTR2195 0412
Installer, please leave with homeowner.
Homeowner, retain for future reference.

SAFETY INFORMATION
Read, understand, and follow all safety information contained in these instructions prior to installation and use of the APUN Series Upflow Acid Neu-
tralizer. Retain these instructions for future reference.
Intended use:
APUN Series Upflow Acid Neutralizers are intended for use in treating acidic water conditions in homes and have not been evaluated for other uses.
These systems are intended for indoor installations near the entry point of a home water line, and must be installed by qualified professional installers
according to these installation instructions.
EXPLANATION OF SIGNAL WORD CONSEQUENCES
WARNING
WARNING
Indicates a potentially hazardous situation, which, if not avoided, could result in death or serious injury and/or property
damage.
CAUTION
CAUTION
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury and/or property
damage.
CAUTION
CAUTION
Indicates a potentially hazardous situation, which, if not avoided, may result in property damage.
WARNING
To reduce the risk associated with choking:
• Do not allow children under 3 years of age to have access to small parts during the installation of this product.
To reduce the risk associated with ingestion of contaminants:
• Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
To reduce the risk of physical injury:
• Shut off inlet water supply and depressurize system as shown in manual prior to service.
To reduce the risk associated with a hazardous voltage:
• If the home electrical system requires use of the cold water system as an electrical safety ground, a jumper must be used to ensure a sufficient ground connec-
tion across the Acid Neutralizer System installation piping — refer installation to qualified personnel.
• Do not use the system if the power cord is damaged — contact qualified service personnel for repair.
To reduce the risk associated with back strain due to the heavy weight of the various system components:
• Follow safe lifting procedures.
CAUTION
CAUTION
To reduce the risk associated with skin, eye, and respiratory tract irritation from gravel and neutralizer media during installation:
• Gravel and several types of neutralizer media may be used in this product, depending upon the application. During installation, dust may cause irritation to skin,
eyes, and respiratory tract.
• Utilize a NIOSH-approved dust filter mask, protective gloves, and appropriate eye protection when handling and pouring gravel and neutralizer media.
• To request an MSDS relating to the media shipped with this product, call 203-238-8965 or go to www.3M.com , select country, and use the search engine to
search MSDS. For emergencies, call 800-364-3577 or 651-737-6501 (24 hours).
To reduce the risk associated with skin, eye, and respiratory tract irritation from water treatment chemicals:
• Several types of water treatment chemicals may be used in this product, depending upon the application. During installation and use, exposure may cause irrita-
tion to skin, eyes, and respiratory tract.
• Utilize a NIOSH-approved dust filter mask, protective gloves, and appropriate eye protection when handling and pouring water treatment chemicals.
• To request an MSDS relating to the media shipped with this product, call 203-238-8965 or go to www.3M.com , select country, and use the search engine to
search MSDS. For emergencies, call 800-364-3577 or 651-737-6501 (24 hours).

CAUTION
To reduce the risk associated with property damage due to water leakage:
• Read and follow Use instructions before installation and use of this water treatment system.
• Installation and use MUST comply with existing state or local plumbing codes. Use flexible tubing connections to connect the valve to household plumbing
(as shown in schematic).
• Protect from freezing, relieve pressure and drain system when temperatures are expected to drop below 33°F (0.6°C).
• Do not install systems in areas where ambient temperatures may go above 110°F (43.3°C).
• Do not install on hot water supply lines. The maximum operating water temperature of this Acid Neutralizer System is 110°F (43.3°C).
• Do not install if water pressure exceeds 100 psi (689 kPa). If your water pressure exceeds 80 psi (552 kPa), you must install a pressure limiting valve.
Contact a plumbing professional if you are uncertain how to check your water pressure.
• Do not install where water hammer conditions may occur. If water hammer conditions exist you must install a water hammer arrester. Contact a plumb-
ing professional if you are uncertain how to check for this condition.
• Where a backflow prevention device is installed on a water system, a device for controlling pressure due to thermal expansion must be installed.
• Do not use a torch or other high temperature sources near Acid Neutralizer System, cartridges, plastic fittings or plastic plumbing.
• On plastic fittings, never use pipe sealant or pipe dope. Use PTFE thread tape only, pipe dope properties may deteriorate plastic.
• Take care when using pliers or pipe wrenches to tighten plastic fittings, as damage may occur if over tightening occurs.
• Do not install in direct sunlight or outdoors.
• Mount system in such a position as to prevent it from being struck by other items used in the area of installation.
• Ensure all tubing and fittings are secure and free of leaks.
• SHUT OFF FUEL OR ELECTRIC POWER SUPPLY TO WATER HEATER after water is shut off.
• Do not install system where water lines could be subjected to vacuum conditions without appropriate measures for vacuum prevention.
• Do not install system where water lines could be subjected to vacuum conditions without appropriate measures for vacuum prevention.
• Do not apply heat to any fitting connected to Bypass or Control Valve as damage may result to internal parts or connecting adapters.
• Install on a flat/level surface. It is also advisable to sweep the floor to eliminate objects that could pierce the media tank.
To reduce the risk associated with property damage due to plugged water lines:
• Pay particular attention to correct orientation of control valve. Water flow should match arrow on control valve. The Inlet and Outlet of other water treatment
equipment products will vary depending on the control valve brand used.
IMPORTANT NOTES
IMPORTANT NOTES
• Failure to follow instructions may result in water leakage and will void warranty.

SECTION 1: HOW A NEUTRALIZER WORKS
The low pH (acid) water passes through a special limestone neutralizing media and slowly dissolves the media raising the pH to approximately
7 units (neutral) or higher. Periodic media replenishment is therefore required. The frequency and amount of media replenishment depends
on the volume of water used and how acidic the water is before treatment. The lower the pH (acidity) of the water being treated, the greater
the attrition rate of the media and the slower the water should pass through the bed. The unit should be sized according to the level of pH and
existing flow rate. Your dealer can provide an estimate of your replenishment requirements.
APUN Series Upflow Acid Neutralizers virtually eliminate the possibility of media bed “cementing” because the water to be treated actually
“upflows” through the neutralizer media bed! This procedure requires NO electricity or backwashing.
A large fill-port permits easy replenishment of the “sacrificial” neutralizing media by the homeowner or a service technician.
There are different media types available which can be used in this APUN Series Upflow Acid Neutralizer System. Each is designed to
improve a particular aesthetic problem. None of them should be used to make non-potable water safe to drink. The following descriptions
indicate not only what the media is designed to do, but also points out their limitations.
Neutralizer Blend
Neutralizer media is typically a blend of calcium carbonate and magnesium oxide. This media is used to elevate the pH of acid water
and is generally used when the pH is approximately 5.5 - 6.0 units. The neutralizer media dissolves when water with a low pH passes
through. The blend is used to take advantage of the fast, vigorous pH adjusting capabilities of magnesium oxide and the slow, long-lasting
capabilities of the calcium carbonate. Neutralizer is typically not recommended when the pH of the raw water is below 5.5 units, because
the dissolve rate would be high and thus constant maintenance of the APUN Series Acid Neutralizer System would be necessary. In these
cases contact our Customer Service Department at 1-800-222-7880 for recommendations.
IMPORTANT NOTE
IMPORTANT NOTE
Since the neutralizer media dissolves as it elevates pH level, it will increase the hardness of your water. If your dwelling contains a
tankless water heater, a water softener must be installed after the APUN Series Upflow Acid Neutralizer System to help prevent the
heater coil from plugging with hardness material.
Calcium Carbonate
Calcium carbonate can be used when only a slight pH adjustment is required (typically 6.0 to 6.8 units). Calcium carbonate is sacrificial
(dissolves) when adjusting pH and will thus increase hardness as well. Replenishment will be required periodically, once again depending
on raw water pH and water consumption.
IMPORTANT NOTE
IMPORTANT NOTE
Since both calcium carbonate and magnesium oxide increase hardness of your water, if your dwelling contains a tankless water heater, it is recom-
mended that a water softener be installed after the APUN Series Upflow Acid Neutralizer System to help prevent the heater coil from plugging with
hardness material.
1
TABLE OF CONTENTS
SECTION DESCRIPTION
1 HOW A NEUTRALIZER WORKS
2 INSTALLATION
3 MAINTENANCE
4 TROUBLESHOOTING
5 SPECIFICATIONS
6 COMPONENT PARTS
7 LIMITED WARRANTY

SECTION 2: INSTALLATION
CAUTION
To reduce the risk associated with property damage due to water leakage:
• Installation and use MUST comply with existing state or local plumbing codes.
• SHUT OFF FUEL OR ELECTRIC POWER SUPPLY TO WATER HEATER after water is shut off.
Step 1
Refer to Typical Installation Sequence (Figure 1) for correct placement
of neutralizer in relationship to other water treatment devices. Installa-
tion location is critical because it may change the effectiveness of other
products.
Step 2
Shut off all water at main supply. On a private well system, turn off
power to pump and drain pressure tank. Make certain pressure is re-
lieved from complete system by opening nearest faucet to drain system.
Shut off fuel supply to hot water heater.
Step 3
Gently rock tank from side to side in order to make sure the gravel shipped inside the tank is spread across the bottom of the tank (APUN301
only). Gravel may have shifted during shipping and handling. Locate the bypass valve and connect to the head assembly. Assemble the con-
nection fittings and connect to the bypass valve. Tighten the connection nuts on both the bypass and connections fittings by hand only. Close
both the inlet and outlet valves on the bypass and leave in closed position until instructed otherwise.
CAUTION
To reduce the risk associated with property damage due to water leakage:
• Installation and use MUST comply with existing state or local plumbing codes.
• Mount system in such a position as to prevent it from being struck by other items used in the area of installation.
• Install on a flat/level surface. It is also advisable to sweep the floor to eliminate objects that could pierce the media tank.
To reduce the risk associated with property damage due to plugged water lines:
• Pay particular attention to correct orientation of control valve. Water flow should match arrow on control valve. The inlet and outlet of other water treatment
equipment products will vary depending on the control valve brand used.
Step 4
Refer to diagram (Figure 2) for recommended plumbing procedure. Cut main
supply line as required to fit plumbing to the inlet and outlet of neutralizer. Use
thread tape on nipple threads, as most pipe thread pastes will cause deterio-
ration of plastic fittings. Hold nipples with wrench while attaching plumbing.
DO NOT OVERTIGHTEN. If a boiler drain (not supplied) is to be connected, be
sure to install it on the outlet side of the APUN Series Upflow Acid Neutralizer
System.
Figure 2. RECOMMENDED PLUMBING PROCEDURE
1. APUN Head Assembly
2. Bypass Valve
3. Connection Fittings
4. Media Tank
5. 1” PVC Tee (Threaded Female)
1
4
2
5
Boiler Drain Attachment
3
Figure 1. TYPICAL INSTALLATION SEQUENCE
2

Step 5
After completion of plumbing connections, remove fill-port cap using wrench provided and pour neutralizer media into mineral tank using
funnel provided (Figure 4). DO NOT fill tank above the line on the side of the media tank.
IMPORTANT NOTE
Overfilling the tank can result in neutralizer media entering the service lines. You may have been provide more media than is required
for the initial fill. Save this extra media for future replenishment.
Step 6
Open inlet valve and then turn water supply back on. Using a garden hose or bucket, fill unit with water through fill-port. Replace fill-port
cap.
Step 7
Attach a garden hose to boiler drain (if installed) on outlet of the APUN Series Upflow Acid Neutralizer System. Discharge of hose should be
into a bucket or drain. Open boiler drain and slowly open inlet valve to flush the APUN Series Upflow Acid Neutralizer System. Discharge
water from hose will be milky white due to fines generated during shipping and handling. Very fine particles of neutralizer media may also
be observed in the water. If “sand” like particles are observed, reduce flush flow rate and then gradually increase. Continue to flush until
discharge water runs clear.
Step 8
Upon completion of flushing, close boiler drain and bypass valve and open outlet valve.
Step 9
Installation is now complete. Turn water heater back on and test treated water with commercially available pH test kit.
IMPORTANT NOTES:
• If the home utilizes a tankless water heater, it is recommended that a water softener be installed following the the APUN Series Upflow Acid Neutralizer
System.
• If the pH is initially over corrected, the inlet bypass can be partially closed to mix untreated water with treated water to achieve the desired level.
3

4
SECTION 3: MAINTENANCE
The media in this the APUN Series Upflow Acid Neutralizer System is sacrificial, therefore it must be replenished periodically. The frequency is
dependent on the raw water pH and your water consumption habits. The lower the pH and the higher the water usage, the more frequently
replenishment will be required. One easy way of determining when to replenish is by placing a mark on the outside of the tank at the level
of the media when first installed. Periodically shine a bright light through the tank and compare the current level to the mark, if it is down
more than two (2) inches, add media to the mark. If you are unable to see through the tank, remove the fill-port cap and measure down
to the top of the media. The tank should be 2/3 full. If not, add media.
REPLENISHING MEDIA:
1) Close inlet and outlet valves. Open bypass valve so untreated water can still be used during the replenishment operation.
2) Open boiler drain to relieve pressure. Remove fill-port cap using wrench provided, some water will drain out of the fill-port opening. Use
a flexible tube to siphon approximately two gallons of water from the tank.
3) Using the funnel provided, add the required amount of media, not to exceed the indicated line on the media tank. A bright light may be
placed behind the tank to observe the media level.
4) Refer to Steps 8-9 in Section 2 for flushing instructions to complete the replenishment operation.
Figure 4. ADDITION OF NEUTRALIZER MEDIA
Add media through fill-port using funnel

SECTION 4: TROUBLESHOOTING
Problem Possible Solutions
A. Neutralizer overcorrects upon installation or after replenishment. 1. The inlet bypass can be partially closed to allow untreated and treated water
to mix to obtain desired pH level. Periodically test treated water pH and open
bypass valve when pH begins to drop.
B. Neutralizer fails to increase pH upon installation. 1. Make sure bypass valve is closed.
2. Test water or have it tested via third party. If high hardness or total dissolved sol-
ids (TDS), seek alternate means of treatment such as feeding a solution of soda
ash or caustic soda. In these cases contact our Customer Service Department
at 1-800-222-7880 for recommendations.
C. Neutralizer fails to increase pH after being in service. 1. Check filter bed for cementing or channeling. Break channeling or cementing
with stiff rod or tubing.
D. Excessive pressure drop. 1. Check untreated water for sediment, silt or sand. Install sand trap or multiple
cartridge filter prior to neutralizer.
IMPORTANT SERVICING NOTE:
Under normal circumstances removal of the fill-port head assembly should not be required. However, if it must be re-
moved, disconnect the plumbing attached to the bypass valve first. Then, rotate the fill-port head assembly to the left or
counter-clockwise. Before attempting any disassembly, pressure should be relieved by shutting off water to the system
and opening a faucet. Upon reassembly, all o-rings should be lubricated with silicone grease. Reattach fill-port head
assembly by rotating to the right or clockwise until fill-port head assembly is seated to the tank hand tight. Reconnect the
plumbing to the bypass valve.
SECTION 5: SPECIFICATIONS
Model Number Media (Cu. Ft.) Pipe Size Dimensions Maximum
Flow Rate*
Diameter Height
APUN101 1.0 1 in. (2.54 cm) 10 in (25.4 cm) 63 in (160.0 cm) 6 gpm (22.7 lpm)
APUN201 2.0 1 in. (2.54 cm) 12 in (30.5 cm) 68 in (132.1 cm) 7 gpm (26.5 lpm)
APUN301 3.0 1 in. (2.54 cm) 14 in (35.6 cm) 76 in (193.0 cm) 12 gpm (45.4 lpm)
APUN100-LM None included 1 in. (2.54 cm) 10 in (25.4 cm) 63 in (160.0 cm) 6 gpm (22.7 lpm)
APUN200-LM None included 1 in. (2.54 cm) 12 in (30.5 cm) 68 in (132.1 cm) 7 gpm (26.5 lpm)
Maximum operating temperature 110°F (43.3°C); Maximum operating pressure 20-100 psi. Specifications subject to change without notice.
NOTES:
* The lower the pH (acidity) of the water being treated, the greater the attrition rate of the media and the slower the water should pass
through the bed. The unit should be sized according to the level of pH and existing flow rate.
5

6
SECTION 6: COMPONENT PARTS
Ref Number Description APUN100-LM APUN101 APUN200-LM APUN201 APUN301
1 Upflow Head (Includes Fill-port) 6238131 6238131 6238131 6238131 6238131
2 Media Tank w/Base 6236001-1044 6236001-1044 6236001-1252 6236001-1252 MTP1465B
3 Upflow Distributor Tube 6236435 6236435 6236435 6236435 DF37-69
4 Media, Calcium carbonate N/A C-050P N/A C-050P (x4) C-050P (x6)
5 Gravel, 1/4 x 1/8 N/A QC-18 N/A QC-22 QC-22
6 Funnel U1006 U1006 U1006 U1006 U1006
Not Shown Bushing, 2 1/2-8 x 4-8 --- --- --- --- 2752-2
Not Shown 1” PVC Tee TEEPVCTHR003 TEEPVCTHR003 TEEPVCTHR003 TEEPVCTHR003 TEEPVCTHR003
2
4
3
1
5
6
Items Not Shown
Description of Item Part Number
Wrench V3193-01
Bypass Valve V3006
Connection Fittings V3007-02

7
SECTION 6: PARTS
COMPONENT PARTS LIST
Bypass Valve (Part Number V3006)
Drawing No. Order No. Description Quantity
1 V3151 Nut 1” Quick Connect 2
2 V3150 Split Ring 2
3 V3105 O-ring 215 2
4 V3145 Bypass 1” Rotor 2
5 V3146 Bypass Cap 2
6 V3147 Bypass Handle 2
7 V3148 Bypass Rotor Seal Retainer 2
8 V3152 O-ring 135 2
9 V3155 O-ring 112 2
10 V3156 O-ring 214 2
V3191-01 Vertical Adapter Assembly
6
5
6
5
4
1
4
1
1
2
3
3
1
2
Order No. Description Quantity
V3151 Nut 1” Quick Connect 2
V3150 Split Ring 2
V3105 O-ring 215 2
V3191 Vertical Adapter 2
Drawing No. Order No. Description Quantity
1 V3151 Nut 1” Quick Connect 1
2 V3150 Split Ring 1
3 V3105 O-ring 215 1
4 V3188 Fitting 1” Brass Sweat
Assembly
1
OPTIONAL FITTING
Order No: V3007-02
Description: Fitting 1” Brass Sweat Assembly
1
2
4
3

Aqua-Pure is a trademark of 3M Company used under license.
3M is a trademark of 3M Company.
© 2012 3M Company. All rights reserved.
3M Purification Inc.
400 Research Parkway
Meriden, CT 06450
1-800-222-7880
www.3Mpurification.com
Section 7: LIMITED WARRANTY
Limited Warranty: 3M Purification Inc. warrants this Product to be free from defects in material and workmanship during normal use for the warranty period set forth below. The
warranty period commences from the date of purchase. This warranty does not cover failures resulting from abuse, misuse, alteration or damage not caused by 3M Purification Inc.
or failure to follow installation and use instructions. No warranty is given as to the service life of any filter cartridge, membrane, or media as it will vary with local water conditions and
water consumption.
3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANT-
ABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOMER OR USAGE OF TRADE.
If the Product is found defective within the warranty period, your exclusive remedy and 3M Purification Inc.’s sole obligation shall be, at 3M Purification Inc.’s option, to replace or
repair the Product or refund the purchase price of the Product. This warranty does not cover labor. The remedy stated in this paragraph is Customer’s sole remedy and 3M Purification
Inc.’s exclusive obligation.
Warranty Period:
• One (1) year on the entire product unit
• Five (5) years on the media tank only (does not include internal component parts)
• Five (5) years on the fill-port assembly
• Five (5) years on salt storage container and components*
Limitation of Liability: 3M Purification Inc. will not be liable for any loss or damage arising from this 3M Purification Inc. product, whether direct, indirect, special, incidental, or
consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability. Some states and countries do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation or exclusion may not apply to you.
Warranty Claims:
To obtain warranty service, call 1-800-222-7880 or mail your request to: 3M Purification Inc., 400 Research Parkway, Meriden, CT 06450. Proof of purchase (original sales receipt)
must accompany the warranty claim, along with a complete description of the Product, model number and alleged defect. This warranty gives you specific legal rights, and you may
have other rights which may vary from state to state, or country to country.
* Water Softeners only