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17
Installing the Boiler
Proximity to Fixtures and Appliances
Install the boiler 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 user desires shorter wait
times for hot water, installation of a recirculation
line which circulates domestic hot water back to the
boiler from the furthest fixture is recommended.
Insulate as much of the hot water supply and
recirculation lines as possible. For more information
about the water supply, refer to “3.2 Installing a
Domestic Hot Water (DHW) System” on page 26.
Adequate Drainage
The boiler produces a significant amount of
condensate during operation. The boiler should be
located near a suitable drain and where damage
from a possible leak will be minimal. Installing the
boiler in a location without a drain will void the
warranty and Navien will not be responsible for
water damages that occur as a result. For more
information about condensate drainage, refer to “3.3
Connecting the Condensate Drain” on page 28.
The boiler must be located in an area where leakage
of the unit or connections will not result in damage
to the area adjacent to the appliance or to lower
floors of the structure. When such locations cannot
be found, installation of an adequately drained drain
pan under the boiler is highly recommended. When
installing the drain pan, ensure that the installation
does not restrict combustion air flow.
Adequate Venting and Ventilation
Select a location that requires minimal venting.
Consider venting restrictions caused by windows,
doors, air intakes, gas meters, foliage, and other
buildings. For more information about venting, refer
to “5. Venting for Combustion Air” on page 62.
To ensure adequate venting and ventilation, follow
these guidelines:
●
Maintain proper clearances from any openings in
the building.
●
Ensure that the vent termination is at least 12 in
(300 mm) above ground, 12 in (300 mm) above
the highest anticipated snow level, or as required
by local codes, whichever is greater.
●
Do not enclose the vent termination.
●
Install the exhaust vent in an area that is free
from any obstructions, where the exhaust will not
accumulate.
●
Do not install the boiler where moisture from the
exhaust may discolor or damage walls.
●
Do not install the boiler in bathrooms, bedrooms,
or any other occupied rooms that are normally
kept closed or not adequately ventilated.
Summary of Contents for NFC-250/175H
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