Navien NPE-180A2 Installation Manual page 17

Proximity to Fixtures and Appliances
Install the water heater near fixtures that deliver
or use hot water, such as bathroom, kitchen,
and laundry room faucets. Select a location that
minimizes the water piping required between major
fixtures. If the distances are long or if the water
heater requires "instant" hot water, we recommend
running a recirculation line back to the water heater
from the furthest fixture. Insulate as much of the hot
water supply and recirculation lines as possible. For
more information about the water supply, refer to
"3.4 Connecting the Water Supply" on page 25.
Adequate Installation Clearances
Install the water heater in an area that allows
for service and maintenance access to utility
connections, piping, filters, and traps. Based on the
installation location, ensure the following clearances
are maintained:
Clearance Indoor
from: Installation
9 in. (229 mm)
Top
minimum
0.5 in. (13 mm)
Back
minimum
4 in. (100 mm)
Front
minimum
3 in. (76 mm)
Sides
minimum
12 in. (300 mm)
Bottom
minimum
Clean, Debris and Chemical-Free
Combustion Air
Do not install the water heater in areas where
●
dust and debris may accumulate or where hair
sprays, spray detergents, chlorine, or similar
chemicals are used.
Do not install the water heater in areas where
●
gasoline or other flammables are used or stored.
Ensure that combustible materials are stored
●
away from the water heater and that hanging
laundry or similar items do not obstruct access to
the water heater or its venting.
Outdoor
Installation
36 in. (900 mm)
minimum
0.5 in. (13 mm)
minimum
24 in. (600 mm)
minimum
3 in. (76 mm)
minimum
12 in. (300 mm)
minimum
The combustion air must be free
Note
of flammable vapors or corrosive
chemical fumes. Common corrosive
chemical fumes to avoid include
fluorocarbons and other halogenated
compounds such as Freon,
trichloroethylene, perchloroethylene,
chlorine, all of which can be found in
refrigerants or solvents. When these
chemicals burn, they produce acids
that corrode the stainless steel heat
exchanger, gaskets, and the flue and
vent system.
In commercial locations, do not install the water
●
heater in areas with greasy fumes or heavy
amounts of steam or take measures to prevent
fumes and steam from entering the water heater.
High Altitude Installations
This unit may be installed at elevations up to 10,100
ft (3,078 m) for use with natural gas and propane
gas. The Panel Setting should be set as described in
"Setting Up the Altitude" on page 61.
Natural gas units require the use of a Natural Gas
High Altitude Conversion Kit if installed at an
elevation of 5,400 ft (1,646 m) or higher.
WARNING
ALWAYS read and follow the Natural Gas High
●
Altitude Conversion Guide when installing
the gas orifice included with the kit in order
to prevent death, serious injury or property
damage.
The front cover will need to be removed from
●
the water heater to access the High Altitude
Conversion Kit.
Coastal Installations
For installations in sea or marine environments, the
salty air can cause corrosion to the water heater. The
water heater should be protected and enclosed to
minimize exposure to the corrosive atmosphere.
Damage due to a corrosive environment is not
covered under warranty.
Operating Temperature
The ambient temperature at the installation location
must be above 32˚F (0˚C) and below 120˚F (49˚C).
Installing the Water Heater 17