Residen al Gas Tankless Water Heater Use and Care Guide • 11
IMPORTANT SAFETY INFORMATION
To reduce the risk of unusually hot
water reaching the
fi
xtures in the
house, install Thermosta c Mixing
Valves at each point-of-use.
If anyone in your home is at par cular
risk of scalding (for example, the
elderly, children, or people with
disabili es) or if there is a local code
or state/provincial law requiring a
certain water temperature at the
hot water tap, these precau ons are
par cularly important.
According to a na onal standard
American Society of Sanitary
Engineering (ASSE 1070) and most
local plumbing codes, the water
heater’s thermostat should not be
used as the sole means to regulate
water temperature and avoid scalds.
Water Contamina on Risk
Do not use chemicals that could
contaminate the potable water supply.
Do not use piping that has been
treated with chromates, boiler seal, or
other chemicals. Suitable for potable
water hea ng only.
Fire Risk
To reduce the risk of a
fi
re that could result in
property damage, or
serious injury or death:
• Do not store things that can burn
easily such as paper or clothes next
to the water heater.
• Do not store or use gasoline or other
fl
ammable substances in the vicinity
of this or any other appliance.
• Do not use this appliance if any part
has been in contact with or been im-
mersed in water. Immediately call a
quali
fi
ed installer or service agency
to replace a
fl
ooded water heater.
Do not a empt to repair the unit. It
must be replaced.
Explosion Risk
High pressures in the
water heater can cause
an explosion resul ng in property
damage, serious injury or death. A
Pressure Relief Valve is required to
be installed on the water heater. A
Pressure Relief Valve is supplied
with X3® models and shall be
fi
eld
supplied for M models. Addi onal
pressure protec ve equipment may
be required by local codes.
A na onally recognized tes ng
laboratory maintains public inspec on
of the valve produc on process
and cer
fi
es that it meets the
requirements for Relief Valves for Hot
Water Supply Systems, ANSI Z21.22.
The Pressure Relief Valve’s relief
pressure must not exceed the working
pressure ra ng of the water heater as
stated on the ra ng plate.
Carbon Monoxide 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, resul ng in
serious injury or death. This water
heater must be supplied with
adequate combus on air and must
be properly vented to the outdoors.
Have a quali
fi
ed person (licensed
plumber, authorized gas company
personnel, or authorized service
technician) install the ven ng system
using these installa on instruc ons.
Install a fuel gas and carbon
monoxide detector in the living areas
of your home.
• Failure to follow these instruc ons
can result in serious injury or death
from carbon monoxide poisoning.
