Expansion Tanks for Potable Water Systems

ASME And Non-Code

WARNING: Label Part No. 9015-463must be installed in this location. If missing, it must be replaced.

WARNING: Label Part No. 9017-078must be installed in this location. If missing, it must be replaced.

INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.

SAFETY INSTRUCTION

This safety alert symbol will be used in this manual todraw attention to safety related instructions. When used, the safetyalert symbol means ATTENTION! BECOME ALERT! YOUR SAFETYIS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAYRESULT IN A SAFETY HAZARD.

WARNING: Explosion Hazard.

A relief valve must be installed to prevent pressure inexcess of local code requirements or maximum working

pressure in manual, whichever is less. This product must beinstalled by a qualified professional. Failure to follow the instructionsin the accompanying product manual may cause a rupture or explo-sion. Failure to follow this instruction may result in serious personalinjury or death and property damage and void product warranty.

DESCRIPTION

Series “PT” and “PTA” expansion tanks are precharged diaphragm-type vessels. The PTA Series meet the requirements of the ASMEboiler and pressure vessels code. The Series “PT” and “PTA” tanksare designed to absorb the force of expanding water and protect thepotable water system from pressure build up. Refer to table 1 onpage 2 for pressure and temperature information.

WARNING: Carefully read the Instruction Manual to avoidserious personal injury and property hazards and toensure safe use and proper care of this product.

WARNING: Use only potable water. Installer must complywith all plumbing codes. Do not operate in a setting wherethe temperature or pressure can exceed the maximum

limitation specified. Refer to Table 1 on page 2 for the maximum lim-itations specified. Failure to follow this instruction may result in seri-ous personal injury or death and property damage.

WARNING: Do not locate this product where leaking orflood could cause damage to the surrounding area. A drippan connected to an adequate drain must be installed if

leaking or flooding could cause property damage. Failure to followthis instruction may result in property damage.

INSTALLATION INSTRUCTIONS

A. Pre-Installation

1. Visually inspect expansion tank and check for damageprior to installation.

WARNING: If the expansion tank is damaged, it must bereplaced. Failure to follow this instruction may result inserious personal injury or death and property damage.

2. Adjust pre-charge to equal incoming pressure.

3. Replace and tighten plastic cap on air fitting.

INSTRUCTION MANUAL V58303B

MAXIMUM LIMITATIONS FACTORYMODEL NUMBER PRESSURE TEMPERATURE PRE-CHARGE

PT-5, PT-12, PT-25V, PT-30V, PT-42V, PT-60V, PT-80V, PT-180V, PT-210V 150 PSIG (1035 kPa) 200°F (93°C) 40 PSIG (379 kPa)PT-447 through PT-457 150 PSIG (1035 kPa) 240°F (115°C) 55 PSIG (379 kPa)PTA-5, PTA-12, PTA-20V, PTA-30V, PTA-42V, PTA-60V,PTA-80V, PTA-180V, PTA-210V 150 PSIG (1035 kPa) 200°F (115°C) 55 PSIG (379 kPa)PTA-447 through PTA-457 125 PSIG (862 kPa) 240°F (115°C) 55 PSIG (379 kPa)

TABLE 1

*Water temperature not to fall below 35°F (1.6°C).

WARNING: State of California Residents.This product contains a chemical known by the State ofCalifornia to cause cancer. This product contains a

chemical known by the State of California to cause birth defects orother reproductive harm.

WARNING: System fluid under pressure and/or at hightemperatures can be very hazardous. Before servicing,reduce system pressure to zero or isolate the vessel from

the system. Allow system to cool below 100°F and above 35°F.Failure to follow this Instruction may result in serious personal injuryand/or property damage.

WARNING: Do not adjust the pressure or re-pressurizethis product except for any adjustments at the time of theinitial installation when the product is new. Only qualified

professionals should check, adjust or re-charge the pre-charge of tanks. failure to follow this instruction may result in serious per-sonal injury or death and property damage.

B. Installation

1. Install the expansion tanks on the cold water supply(CWS) line at a point between the water heater and back-flow preventer, check valve or pressure reducing valve(see Figure 1).

2. Once tank is installed fill system and check for any leak-age. Make repairs if necessary.

WARNING: Rupture or Explosion Hazard.Like most pressurized tanks, this tank can over time cor-rode, weaken, and burst or explode. Failure to follow this

instruction may result in serious personal injury or death and prop-erty damage.

WARNING: Chlorine & Aggressive Water Warning.The water quality can significantly influence the life ofyour product. You should test for corrosive elements,

acidity, total solids, and other relevant contaminants, including chlo-rine and treat your water appropriately to insure satisfactory per-formance and prevent premature failure. Failure to follow thisinstruction may result in serious personal injury or death and prop-erty damage.

WARNING: Install or store where tank will not beexposed to temperatures below freezing or above ratedworking temperature. Do not expose to any type of

weather.

3. Before the initial firing of the water heater, open a hotwater fixture and draw water until all air is removed fromthe system. Turn the water heater temperature control todesired ending temperature level (see water heaterinstructions).

4. To relieve initial thermal expansion, slightly open a hotwater faucet. Continue until water heater aquastat tem-perature is satisfied. Once heater is at its operating range,no further bleeding of expanded water is required.

5. The system water heater and expansion tank will now beoperational. The expansion tank will absorb pressureincreases caused by thermal expansion to a level wellbelow the water heater relief valve setting.

OPERATING INSTRUCTIONS

1. The expansion tank is installed in the supply line betweenthe backflow preventer and the water heater. Its sealed-inair pre-charge prevents water from entering the tank untilthe system pressure exceeds the pre-charge pressure.

2. As the water temperature rises, expanded water entersthe expansion tank’s non-corrosive water reservoir. Thepre-charge air chamber absorbs the pressure increase,keeping system pressures below the relief valve setting.

3. As hot water is used, the pressure in the air chamberforces water back into the system until the expansiontank is empty. At this point, the pressure in the air cham-ber once again equals the supply pressure.

NOTE: Models PT-5, PT-12 and PT-25V are IAPMO listed.

Models PT-5 thru PT-210V are listed under ANSI/NSF Std61 and City of Los Angeles.

Models PTA-5 thru PTA-210V are listed under ANSI/NSFStd. 61 and City of Los Angeles.

SERIES “PT” OR “PTA”IN-LINE MOUNTMODELS

SERIES “PT” OR “PTA”FLOOR MOUNTMODELS

Xylem Inc.

8200 N. Austin Avenue Morton Grove, Illinois 60053 Phone: (847) 966-3700 Fax: (847) 965-8379www.xyleminc.com/brands/bellgossett

Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries. © 2012 Xylem Inc. V58303B May 2012