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Chapter 3. – Safety Requirements
3-4. High Elevation Installations
•This unit is only ANSI/CSA certified for installation up to 4500 ft. (1,350 m) above sea level.
•For installations at higher elevations, please refer to the directions below or contact Noritz America.
Note:
This water heater may be installed at elevation up to 10,000 ft for use with Natural Gas and Propane. The water heater must be set
for a specific altitude using the Installer Mode Setting described below.
Above 2,000 ft (610 m), the water heater will de-rate by 4% for each 1,000 ft (305 m) of altitude gain.
[ Installer Mode ]
Operation
Display
5:EL
＊Please refer to page 35 for more detail setting method on control panel.
3-5. Installation Clearances
WARNING
Before installing, check for the following:
Install in accordance with relevant building and mechanical codes, as well as any local, state or national
regulations, or in the absence of local and state codes, to the National Fuel Gas Code ANSI Z223.1/
NFPA 54 – latest edition. In Canada, see Natural Gas and Propane Installation Code (CSA B149.1-
latest edition.) for detailed requirements
Distance from combustibles
Maintain the following clearances from both combustible
and non-combustible materials.
12
Description
Select an elevation range from the following four options based on where the water
High Elevation
heater is installed.
0 ~ 2
0 ~ 1,999 ft (0 ~ 609 m), Default
2 ~ 5
2,000 ~ 4,999 ft (610 ~ 1,523 m)
5 ~ 8
5,000 ~ 7,999 ft (1,524 ~ 2,438 m)
8 ~ 10
8,000 ~ 10,000 ft (2,439 ~ 3,048 m)
Indoor Installation
Cooking Equipment
<When the indoor air supply>
If the unit will be installed in the vicinity of a permanent
kitchen range or stove that has the possibility of generating
steam that contains fats or oils, use a dividing plate or
other measure to ensure that the unit is not exposed to air
containing such impurities.
* The dividing plate should be of noncombustible material of
a width greater than the water heater.
Installation Clearances
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