Consumer Responsibilities, Pressure Build-Up - American Standard 75-76 AS Operating, Installation And Service Manual

CONSUMER RESPONSIBILITIES
THIS MANUAL HAS BEEN PREPARED TO ACQUAINT
YOU WITH THE INSTALLATION, OPERATION AND
MAINTENANCE OF YOUR GAS WATER HEATER AND
TO PROVIDE IMPORTANT SAFETY INFORMATION.
WE URGE YOU TO READ ALL INSTRUCTIONS
before attempting installation or operation of
THOROUGHLY
your water heater. Keep these instructions for future reference.
The manufacturer of this water heater will not be liable for any
damages caused by failure to comply with the installation and
operating instructions outlined on the following pages. These
instructions are a guide for the correct installation of your
water heater. If you lack the necessary skills required or have
difficulty following the directions, you should not proceed but
get help from a qualified person for that part of the installation
you do not understand. Your gas-fired water heater is design-
certified by the American Gas Association Laboratories. The
installation should conform with the local code or the
authority having jurisdiction, or in the absence of such, the
National Gas Code. ANSI Z223.1 (NFPA 54) 1992. A copy of
the 1992 edition of the Code can be purchased from A.G.A.
Order Processing, 1515 Wilson Boulevard, Arlington, VA
22209 (703) 841-8559. A rating plate identifying your water
heater will be found next to the gas control valve (thermostat).
When referring to your water heater always have the
information listed on the rating plate readily available.
PRESSURE BUILD-UP IN
CLOSED WATER SYSTEMS
The water utility supply meter may contain a check valve,
back flow preventer or water pressure reducing valve. This will
create a closed water system. During the heating cycle of the
water heater, the water expands creating a pressure build-up in
the water system. A temperature and pressure relief valve must
be installed on the water heater (150 PSI maximum pressure
setting. See Temperature and Pressure Relief Valve). To
prevent the temperature and pressure relief valve from
discharging hot water, loss of energy, and reduce the possible
build-up of lime on the temperature and pressure relief valve
seat.
AN EXPANSION TANK MUST BE INSTALLED on the cold
water supply line. For every 50 U.S. gallons of stored water,
the expansion tank must have a minimum capacity of 1.5
U.S. gallons.
If water heater is installed in a closed water system, contact the
water supplier or local plumbing inspector on how to control
this situation.
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130931 Rev April ʻ07