Navien NCB-150E Service Manual page 12

DANGER
COMPROMISED VENTING SYSTEM
Failure to follow the Venting Section of the installation
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manual may result in unsafe operation of this boiler. To
avoid the risk of fire, explosion or asphyxiation from carbon
monoxide, never operate the boiler unless it is properly
vented to the outside and has an adequate air supply for
proper operation.
Be sure to inspect the vent termination and the air intake
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pipe annually to ensure safe operation of the boiler.
Immediately turn off and do not use the boiler if any of the
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vent pipes, vent elbows and/or the boiler are:
damaged in any way;
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separated at a joint,
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cracked or show evidence of corrosion, rusting or
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melting.
DANGER
WHAT TO DO IF YOU SMELL GAS
If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal
injury or loss of life.
DO NOT OPERATE THE BOILER.
DO NOT OPERATE ANY FAUCETS.
Smell all around the appliance area for gas. Be sure to smell
next to the floor because some gas is heavier than air and will
settle on the floor.
Do not smoke.
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Extinguish any open flames and sparks.
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Do not operate light switches or electrical equipment
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switches.
Do not use any phone in your building.
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Open the windows and doors.
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Close the gas shutoff valve.
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Keep people away from the danger zone.
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Observe the safety regulations of your local gas supplier,
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found on the gas meter.
Immediately call your gas supplier from the outside of the
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building. Follow the gas supplier's instructions.
If you cannot reach your gas supplier, call the fire department.
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Notify your plumbing/heating contractor from the outside
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of the building.
DANGER
HOT
BURN
HOT WATER TEMPERATURE SETTING
Water temperatures at or above 125°F (52°C) can cause
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severe burns instantly or death from scalds.
Households with small children, disabled, or elderly persons
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may require 120 °F (49°C) or lower temperature setting to
prevent contact with "HOT" water.
TO PREVENT BURNS
Use the lowest operating temperature setting necessary to
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provide comfortably-hot water.
If your household has children or elderly or disabled
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residents, consider using a lower temperature setting.
Read all the instructions in this manual carefully before
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changing the temperature setting.
Feel the water before using it on children, the elderly, or the
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disabled.
Contact a licensed plumber or your local plumbing authority
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for more information.
This boiler's water temperature is set to 120°F (49°C) at
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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.
Time in which a young child can suffer
Water Temperature
a full thickness (3rd degree) burn
160°F (70 °C) Less than 1 second
140°F (60 °C) 1 second
130°F (55 °C) 10 second
120°F (49 °C) 10 minutes
100°F (37 °C) very low scald risk
Safety Information 11