Amtrol ST-1 Installation instructions

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. Do not expose
Product to freezing temperatures or water
temperatures in excess of 140°F. 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. USE ONLY
WITH RESIDENTIAL POTABLE WATER SYSTEMS.
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.
The recurrence of pressure
buildup may indicate that
this unit is in need of replacement. Operating a
plumbing system in this condition presents the risk
of damage and leaks.
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.
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.htm
THERMAL EXPANSION TANK
FOR POTABLE WATER
INSTALLATION & OPERATION INSTRUCTIONS
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.
Model ST-1

Application
The Model ST-1 expansion tank is for use on
tankless, residential on-demand water heaters
with a total water content of 2 gallons or less
and a maximum set point of 140°F. Do not
use with larger storage-type water heaters,
as these will exceed the capacity of the ST-1.
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 (Figure 1).
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.
Set the water heater temperature control to
desired ending temperature (see water heater
instructions). Do not set temperature higher
than the expansion tank maximum.
4. To relieve initial thermal expansion, slightly
open a hot water faucet. Continue until water
heater temperature is satisfied. Once heater is
at its operating range, no further bleeding of
expanded water is required.
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.
Warranty
ST-1 Model: Five (5) Year Limited Warranty
Visit www.amtrol.com for complete warranty
details.
© 2015 AMTROL Inc. Part #: 9013-011 (09/15)
1400 Division Road, West Warwick, RI USA 02893
T: 800.426.8765 F: 800.293.1519
www.amtrol.com
Figure 1.
PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY
IMPORTANT GENERAL SAFETY INFORMATION -
ADDITIONAL SPECIFIC SAFETY ALERTS APPEAR IN THE FOLLOWING INSTRUCTIONS.
ST-1
Thermal
Expansion Tank
Hot Water
T & P
Relief
Valve
Cold
Water
Supply
Backflow Preventor
Check Valve or
Pressure Reducing Valve
Water
Heater