10 • Residen al Gas Tankless Water Heater Use and Care Guide
To reduce the risk of property
damage, serious injury or death, read
and follow the precau ons below,
all labels on the water heater, and
the safety messages and instruc ons
throughout this manual.
RISKS DURING
INSTALLATION AND
MAINTENANCE
Li ing Risk
WARNING! The
water heater is
heavy. Follow these
precau ons to reduce the risk of
property damage, injuries from li ing
or impact injuries from dropping the
water heater.
• Use at least two people to li the
water heater.
• Be sure you both have a good grip
before li ing.
• 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
instruc ons can result in serious
injury or death from explosion,
fi
re
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 gas supply line approved
for Propane or Natural Gas that
meets all local and state/provincial
codes.
• Install a full port shut-o
ff
valve on
the gas supply line.
• Maintain the Pressure Relief Valve
properly. Follow the maintenance
instruc ons provided by the manu-
facturer of the Pressure Relief Valve
(label a ached to Pressure Relief
Valve). If no label is a ached to the
Pressure Relief Valve, follow the
instruc ons in the Pressure Relief
Valve Maintenance sec on of this
manual. An explosion could occur if
the Pressure Relief Valve or dis-
charge pipe is blocked. Do not cap
or plug the Pressure Relief Valve or
discharge pipe.
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
14” water column. Have a quali
fi
ed
person (licensed plumber, gas
company personnel, or authorized
service technician) check for proper
L.P. gas pressure. L.P. gas pressures
exceeding 14” water column can
result in serious injury or death from
explosion or
fi
re.
RISKS DURING
OPERATION
Scalding Risk
This water heater
can make water hot
enough to cause
severe burns instantly, resul ng in
severe injury or death.
• Feel water before bathing or show-
ering.
• To reduce the risk of scalding, install
Thermosta c Mixing Valves (tem-
perature limi ng valves) at each
point-of-use. These valves automa -
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 instruc ons for installa-
on and adjustment of the valves.
• Water temperatures over 125°F
(52°C) can cause severe burns
instantly or death from scalding. The
water temperature is set at 120°F
(50°C) from the factory to minimize
any scalding risk. Before bathing or
showering, always check the water
temperature. Higher temperatures
increase the risk of scalding, but even
at 120°F, hot water can scald. If you
choose a higher temperature se ng,
Thermosta c Mixing Valves located
at each point-of-use are par cularly
important to help avoid scalding.
Table 3: Burn/Scald Table
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 informa on about changing
the factory temperature se ng, refer
to the “Adjus ng the Temperature”
sec on in this manual.
Even if you set the water heater’s gas
control valve to a low se ng, higher
water temperatures may occur in
certain circumstances.
• Water temperature will be ho er if
someone adjusted the set tempera-
ture to a higher se ng.
• Should overhea ng occur or the
burner fail to shut o
ff
, turn o
ff
the
manual gas supply valve to the
water heater and call a quali
fi
ed
person.
IMPORTANT SAFETY INFORMATION
