18 Installing the Boiler
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.
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 79
for the appropriate altitude setting.
2.3 Mounting the Boiler to the
Wall
Navien NFC-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.
Adequate Installation Clearances
CAUTION
Do not install the boiler on carpeting.
Install the boiler in an area that allows for service
and maintenance access to utility connections,
piping, filters, and traps. Based on the installation
location, ensure that the following clearances are
maintained:
Top
Back
Side
Bottom
Front
Side
Clearance from:
Indoor Installation
Top
9 in (229 mm) minimum
Back
0.5 in (13 mm) minimum
Front
4 in (100 mm) minimum
Sides
3 in (76 mm) minimum
Bottom
12 in (300 mm) minimum
CAUTION
It is necessary to leave clearance for service
access.
Summary of Contents for NFC-250/175H
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