PFXT5 AND PFXT12
POTABLE WATER EXPANSION TANKS
Installation Instructions
PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY BEFORE INSTALLATION.
FOR USE ONLY WITH POTABLE WATER
INSTALLER: LEAVE THIS MANUAL WITH THE OWNER
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.
READ CAREFULLY THE PRODUCT INSTALLATION, 
OPERATING AND MAINTENANCE MANUAL. FAILURE TO FOLLOW THE INSTRUCTIONS AND WARNINGS IN THE MANUAL 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.
RUPTURE OR EXPLOSION HAZARD A relief valve must be 
installed to prevent pressure in excess of local code requirement or maximum working pressure designated in the Product Manual, whichever is less. Do not expose Product to freezing temperatures or temperatures in excess of 200° F. Do not adjust the pre-charge or re-pressure this Product except for any adjustments required at the time of initial installation, especially if Product is 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 lead to Product failure, serious or fatal personal injury, leakage and/or property damage.
Chlorine & Aggressive Water: The water quality can 
significantly influence the life of this Product. 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.
Note: Inspect for shipping damage and notify freight carrier or store where purchased immediately if damage 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 are available from seller. Use proper safety equipment when installing.
Use only with potable water system. 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.
EXPLOSION OR RUPTURE HAZARD! A relief valve must be 
installed to prevent pressure in excess of local code requirement or maximum 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.
PRE-INSTALLATION
1 Ensure expansion tank is sized properly for application (see Figure 1).
2.Remove plastic cap from air valve.
3.With expansion tank empty of water, adjust air precharge to match cold water supply pressure.
4.Replace and tighten plastic cap on air valve.
FAILURE TO PROPERLY SEAL VALVE CAP WILL RESULT IN 
LOSS OF PRECHARGE CAUSING PRODUCT TO FAIL.
Water Heater |
Static Supply Pressure (psi) |
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Size (gals.) |
40 |
60 |
80 |
Figure 1. |
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40 |
2.0 |
2.0 |
2.0 |
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Expansion Tank Model |
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50 |
2.0 |
2.0 |
3.2 |
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Max. Temp. Setting 150˚ F |
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60 |
3.2 |
3.2 |
3.2 |
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80 |
3.2 |
3.2 |
4.4 |
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120 |
4.4 |
4.4 |
10.3 |
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INSTALLATION
1.Install the expansion tank on the cold water supply line to the water heater at a point between the water heater and backflow preventer or other one-way device (see Figure 2.)
2.Once the expansion tank is installed, check the cold water supply line for any leakage. Make repairs if necessary.
3.Before the initial firing of the water heater, open any hot water fixture and draw water until all air is removed from the system. Turn the water heater temperature control to desired ending temperature level, (see water heater instructions). Do not set temperature higher than that which the expansion tank was originally sized.
4.To relieve initial thermal expansion, slightly open a hot water faucet. Continue until water heater aquastat temperature is satisfied. Once heater is at its operating range, no further bleeding of expanded water is required.
Support Tank
in Optional
Horizontal
Position
(Optional
Location)
Water
Supply
Valve Preventer
(Optional
Location)
To System
Expansio n
Tank
Safety
Relief
Valve
|
Water |
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Heater |
Gaug e |
Discharge |
Pressure |
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Pressure |
Line |
Reducing |
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Valve |
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Figure 1 |
Floor Drain |
Figure 2.
NOTE: If vertical installation is impractical, PFXT tank may be installed in a horizontal position as long as the tank weight is fully supported independent of the piping. The support can be in the form of strapping or a support platform. ABSENCE OF AN INDEPENDENT TANK SUPPORT WILL VOID THE WARRANTY.
5.The water heater and expansion tank will now be operational. The expansion tank will control pressure increases caused by thermal expansion to a level below the water heater relief valve setting.
MAINTENANCE
A professional plumber should check the complete system, including the expansion tank, yearly and more frequently as the system ages.
See reverse side for warranty information. |
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© 2018 Ferguson Enterprises, Inc. 0918 962842 Part #: 9015-566
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