17
Installing the Boiler
2.2 Mounting the Boiler to the
Wall
Navien NCB-H boilers come with an upper
mounting bracket that is pre-drilled at 16 in
(400 mm) on center for easy installation on standard
wall studs. If the strength of the wall is insufficient
or if the framing is non-standard or uneven,
reinforce the area before installing the boiler. Avoid
installation on common walls as the unit will make
some operational noises while it is running.
To mount the boiler to the wall:
1. Affix the bracket securely to the wall and ensure
that it is level and that it can support the weight
of the boiler.
2. Align the grooves on the back of the boiler with
the tongues on the mounting bracket and hang
the boiler on the bracket.
When mounted with the mounting bracket, the
boiler will have a
5
/
8
in (16 mm) clearance from
the back of the wall.
3. Install two set screws through the bracket at the
bottom of the boiler to secure the boiler on the
wall.
Clean, Debris and Chemical-free
Combustion Air
●
Do not install the boiler in areas where dust and
debris may accumulate or where hair sprays,
spray detergents, chlorine, or similar chemicals
are used.
●
Do not install the boiler in areas where gasoline or
other flammables are used or stored.
●
Ensure that combustible materials are stored
away from the boiler and that hanging laundry or
similar items do not obstruct access to the boiler
or its venting.
Note
The combustion air must be free 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.
Operating Temperature
The ambient temperature at the installation location
must be above freezing temperature and below
100˚F (38˚C).
High Elevation Installations
●
This unit may be installed at elevations up to
10,100 ft (3,078 m) for use with natural gas and
propane. Refer to “6. Setting the DIP Switches” on
page 72 for the appropriate altitude setting.
●
Natural gas units require the use of a high
elevation kit if installed at an elevation of 5,400 ft
(1,646 m) or higher.
CAUTION
Follow the instructions in the guide provided
with the high altitude conversion kit when
replacing with the kit's gas orifice. Failure to
follow the instructions may result in property
damage, personal injury, or death.
Summary of Contents for NCB-190/060H
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