Navien NCB-24LDWE User's Information Manual - Warning

4        Safety Information

Water 

Temperature

Time in which a young child can suffer 

a full thickness (3rd degree) burn

70°C

Less than 1 second

60°C

1 second

55°C

10 seconds

49°C

10 minutes

37°C

Very low scald risk

WARNING

Ɣ

Shut off the gas supply if the boiler is 

damaged.

Have your installer or plumber show 

you the location of the gas shut off 

valve and demonstrate how to close 

the valve. If the boiler is damaged as a 

result of overheating, fire, flood, or any 

other reason, close the manual shut 

off valve and do not operate the boiler 

again until it has been inspected by a 

qualified technician.

Ɣ

Do not store or use petrol or other 

flammable liquids near this boiler.

Doing so may result in fire or explosion.

Ɣ

Do not place combustibles, such as 

newspapers or laundry, near the 

boiler or flue system.

Doing so may result in a fire.

DANGER

HOT

BURN

To prevent burns:

Ɣ

Use the lowest operating temperature 

setting necessary to provide 

comfortably hot water.

Ɣ

If your household has children or 

elderly or disabled residents, consider 

using a lower temperature setting.

Ɣ

Read all the instructions in this 

manual carefully before changing the 

temperature setting.

Ɣ

Feel the water before using it on 

children, the elderly, or the disabled.

DANGER

This boiler’s water temperature is set to 

49°C at the factory for your safety and 

comfort. Increasing the temperature 

increases the risk of accidental scalding. 

Water temperatures at or above 52°C 

can cause instant scalding or severe 

burns. Before you decide to change the 

temperature setting, read the following 

charts carefully.