A.O. Smith G6-PVT4050NV Installation Instructions And Use & Care Manual page 6

IMPORTANT SAFETY INFORMATION
or discharge pipe is blocked. Do not
cap or plug the T&P Relief Valve or
discharge pipe.
Fire and Explosion Risk if Hot Water
is Not Used for Two Weeks or More.
CAUTION! Hydrogen gas builds up
in a hot water system when it is not
used for a long period (two weeks
or more). Hydrogen gas is extremely
flammable. If the hot water system
has not been used for two weeks or
more, open a hot water faucet for
several minutes at the kitchen sink
before using any electrical appliances
connected to the hot water system.
If hydrogen is present there will
probably be an unusual sound such
as "air" escaping through the pipe
as hot water begins to flow. Do not
smoke or have an open flame or
other ignition source near the faucet
while it is open.
Water Contamination Risk
WARNING! This water heater
operates by burning gas. Carbon
monoxide is a colorless, odorless,
gas that is a by-product of burning
of fuels such as coal, wood,
charcoal, oil, kerosene, propane,
and natural gas. Breathing excessive
and abnormal amounts of carbon
monoxide can cause carbon
monoxide poisoning,
resulting in serious
injury or death. This
water heater must
be supplied with
adequate combustion
air and must be properly vented to
the outdoors. Have a qualified person
(licensed plumber, authorized gas
company personnel, or authorized
service technician) install the venting
system using these installation
instructions. Install a fuel gas and
carbon monoxide detector in the
living areas of your home.
6 • Residential Gas Water Heater Use and Care Guide
• Do not install this water heater in
a mobile home or manufactured
housing.
• Failure to follow these instructions
can result in serious injury or death
from carbon monoxide poisoning.
Burn Risk
This water heater's
venting system can
become hot enough to burn. Do not
touch the venting system while water
heater is on, or until the water heater
is turned off and venting allowed to
cool.
Installation Accessories
Figure 1 - Gas Water Heater Hook-Up Kit
Figure 2 - Install a Pressure Reducing Valve set
to 50 to 60 psi.