Bradford White URG140T10N-394 Manual page 15

Ultra low nox gas-fired water heater
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Installation (Water Connections) continued-
Hydrogen gas can be produced in an operating water heater that has
not had water drawn from the tank for a long period of time (generally
two weeks or more). Hydrogen gas is extremely flammable. To prevent
the possibility of injury under these conditions, we recommend the hot
water faucet to be open for several minutes at the kitchen sink before
you use any electrical appliance, which is connected to the hot water
system. If hydrogen is present, there will be an unusual sound such as
air escaping through the pipes as hot water begins to flow. Do not
smoke or have open flame near the faucet at the time it is open.
This water heater can deliver scalding temperature water at any faucet in the
system. Be careful whenever using hot water to avoid scalding injury. Certain
appliances such as dishwashers and automatic clothes washers may require
increased temperature water. By setting the thermostat on this water heater to
obtain the increased temperature water required by these appliances, the
potential for scald injury increases. To protect against injury, you should install
an ASSE approved mixing valve in the water system. This valve will reduce
point of discharge temperature by mixing cold and hot water in branch supply
lines. Such valves are available from the manufacturer of this water heater or
a local plumbing supplier. Please consult with a plumbing professional.
APPROXIMATE TIME/TEMPERATURE RELATIONSHIPS IN SCALDS
120°F (49°C)
125°F (52°C)
130°F (54°C)
135°F (57°C)
140°F (60°C)
145°F (63°C)
150°F (66°C)
155°F (68°C)
WARNING
Water temperature over 125°F
(52°C) can cause severe burns
instantly or death from scalds.
Children, disabled and elderly
are at highest risk of being
scalded.
Review this instruction manual
before setting temperature
at water heater.
Feel water before bathing or
showering.
Temperature limiting valves are
available.
More than 5 minutes
1½ to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 1½ seconds
About 1 second
15

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