Navien NFC-250/200H User's Information Manual page 5

CAUTION
Do not attempt to repair or replace any
part of the boiler, unless it is specifically
recommended in this manual.
For all other service, contact an authorized
technician or licensed professional. Improper
adjustments, alterations,
maintenance may lead to property damage,
personal injury, or death and will void your
warranty.
Do not operate the boiler if you feel
something is wrong with it.
Doing so may result in product damage or
personal injury.
Do not allow children to operate or access
the boiler.
Doing so may result in product damage or
personal injury.
Do not turn on the boiler unless the water
and gas supplies are fully opened.
Doing so may damage the boiler.
Do not use this boiler for anything other
than its intended purpose, as described in
this manual.
Do not remove the front cover unless
the power to the boiler is turned off or
disconnected.
Failure to do so may result in electric shock.
When servicing the controls, label all wires
prior to disconnecting them.
Failure to do so may result in wiring errors,
which can lead to improper or dangerous
operation.
Do not use unapproved replacement or
accessory parts.
Doing so may result in improper or dangerous
operation and will void the manufacturer's
warranty.
Do not place anything in or around the vent
terminals, such as a clothes line, that could
obstruct the air flow in or out of the boiler.
This boiler has been approved for use in the
USA and Canada only.
Using the boiler in any other country will void
the manufacturer's warranty.
Should overheating occur or the gas supply
fail to shut off, turn off the manual gas
valve to the appliance.
service, or
DANGER
HOT
BURN
To prevent burns:
Use the lowest operating temperature setting
necessary to provide comfortably-hot water.
If your household has children or elderly or
disabled residents, consider using a lower
temperature setting.
Do not leave children, the elderly, or disabled
persons unsupervised.
Do not allow small children to play
unsupervised in the bathroom.
Do not allow anyone to change the water
temperature while hot water is running.
Read all the instructions in this manual
carefully before changing the temperature
setting.
Feel the water before using it on children, the
elderly, or the disabled.
If it is necessary to set the water temperature
above 125°F (52°C), consider installing a
thermostatically-controlled
or temperature-limiting valve. Contact a
licensed plumber or your local plumbing
authority for more information.
mixing valve
Safety Information 5