A.O. Smith G6-PVT4050NV Installation Instructions And Use & Care Manual page 4

IMPORTANT SAFETY INFORMATION
To reduce the risk of property
damage, serious injury or death, read
and follow the precautions below,
all labels on the water heater, and
the safety messages and instructions
throughout this manual.
RISKS DURING
INSTALLATION AND
MAINTENANCE
Lifting Risk
WARNING! The
water heater is
heavy. Follow these
precautions to reduce the risk of
property damage, injuries from lifting
or impact injuries from dropping the
water heater.
• Use at least two people to lift the
water heater.
• Be sure you both have a good grip
before lifting.
• Use an appliance dolly or hand truck
to move the water heater.
Explosion Risk
WARNING! Read the
water heater's data
plate to determine the type of gas
required. Failure to follow these
instructions can result in serious
injury or death from explosion, fire
or carbon monoxide poisoning.
• Do not connect a natural gas water
heater to an L.P. gas supply.
• Do not connect an L.P. gas water
heater to a natural gas supply.
• Use a new CSA approved gas supply
line.
• Install a shut-off valve on the gas
supply line.
4 • Residential Gas Water Heater Use and Care Guide
Gas Pressure
WARNING! The gas supply
pressure must not exceed the
maximum supply pressure as stated
on the water heater's data plate. The
minimum supply pressure is for the
purpose of input adjustment. L.P.
gas supply pressure must not exceed
13" water column. Have a qualified
person (licensed plumber, gas
company personnel, or authorized
service technician) check for proper
L.P. gas pressure. L.P. gas pressures
exceeding 13" water column can
result in serious injury or death from
explosion or fire.
RISKS DURING
OPERATION
Scalding Risk
This water heater
can make water hot
enough to cause
severe burns instantly, resulting in
severe injury or death.
• Feel water before bathing or show-
ering.
• To reduce the risk of scalding, install
Thermostatic Mixing Valves (tem-
perature limiting valves) at each
point-of-use. These valves automati-
cally mix hot and cold water to limit
the temperature at the tap. Mixing
valves are available at your local
plumbing supplier. Follow the man-
ufacturer's instructions for installa-
tion and adjustment of the valves.
• The gas control valve on this water
heater has been factory set to its
lowest setting to reduce the risk
of scalding. Higher temperatures
increase the risk of scalding, but even
at 120°F, hot water can scald. If you
choose a higher temperature setting,
Thermostatic Mixing Valves located
at each point-of-use are particularly
important to help avoid scalding.
Table 1
Temperature Time to Produce a
Serious Burn
120°F (49°C) More than 5 minutes
125°F (52°C) 1½ to 2 minutes
130°F (54°C) About 30 seconds
135°F (57°C) About 10 seconds
140°F (60°C) Less than 5 seconds
145°F (63°C) Less than 3 seconds
150°F (66°C) About 1½ seconds
155°F (68°C) About 1 second
For more information about changing
the factory temperature setting, refer
to the "Adjusting the Temperature"
section in this manual.
Even if you set the water heater's gas
control valve to a low setting, higher
water temperatures may occur in
certain circumstances.
• In some cases, repeated small draws
of water can cause the hot and cold
water in the tank to "stack" in layers.
If this happens, the water can be as
much as thirty degrees hotter than
the gas control valve setting. This
temperature variation is the result
of your usage pattern and is not a
malfunction.
• Water temperature will be hotter if
someone adjusted the gas control
valve to a higher setting.
• Problems with the gas control valve
or other malfunctions may result in
higher than expected water tem-
peratures.
• If the water heater is in a hot envi-
ronment, the water in the tank can
become as hot as the surrounding
air, regardless of the temperature
setting.
• If the water supplied to the water
heater is pre-heated (by a solar
heating system) the temperature
in the tank may be higher than the