Navien NFC Series User's Information Manual page 6

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.
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
mixing valve or temperature-limiting valve. Contact a
licensed plumber or your local plumbing authority for more
information.
DANGER
This boiler's DHW water temperature is set to 120°F (49°C) at the
factory for your safety and comfort. Increasing the temperature
increases the risk of accidental scalding. Water temperatures at
or above 125°F (52°C) can cause instant scalding, severe burns,
or death. Before you decide to change the temperature setting,
read the following charts carefully.
Water Time in which a young child can suffer a
Temperature full thickness (3rd degree) burn
160°F (70°C) Less than 1 second
140°F (60°C) 1 second
130°F (55°C) 10 seconds
120°F (49°C) 10 minutes
100°F (37°C) very low scald risk
Safety Information 5