Navien NPN Installation & Operation Manual page 17

Adequate Drainage
This non-condensing water heater may produce
condensate due to the condition of the installation.
Condensate can be drained through the condensate
collector. The water heater should be located near
a suitable drain and where damage from a possible
leak will be minimal. Installing the water heater in a
location without a drain will void the warranty and
Navien will not be responsible for water damages
that occur as a result.
The water heater 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 water heater is
highly recommended. When installing the drain
pan, ensure that the installation does not restrict
combustion air flow.
16 Installing the Water Heater
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 "3.5 Venting the Water Heater (Indoor Models
Only)" on page 31.
WARNING
Improper venting of the water heater can result
in excessive levels of carbon monoxide, which
can lead to severe personal injury or death. This
water heater must be vented in accordance
with the "Venting of Equipment" section of
the latest edition of the ANSI Z223.1/NFPA
54 Natural Fuel Gas Code in the USA, as
well as all applicable local building codes
and regulations. Follow all instructions and
guidelines when venting the water heater.
Venting should be performed only by a qualified
service agency.
To ensure adequate venting and ventilation, follow
these guidelines:
Maintain proper clearances from any openings in
●
the building.
Install the water heater with a minimum clearance
●
of 12 in
(300 mm) above an exterior grade or as required
by local codes.
Maintain a minimum clearance of 4 ft (1.2 m) from
●
heating and cooling vents.
Do not enclose the vent termination.
●
Install the exhaust vent in an area that is free from
●
obstructions and does not allow the exhaust to
accumulate.
Do not install the water heater where moisture
●
from the exhaust may discolor or damage walls.
Do not install the water heater in bathrooms,
●
bedrooms, or any other occupied rooms that are
normally kept closed or that are not adequately
ventilated.
Install a carbon monoxide detector in the
●
dwelling area that is closest to the appliance.