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3. Installing the Water Heater
3.1 Choosing an Installation Location
When choosing an installation location, you must ensure that
the location provides adequate clearance for the water heater,
adequate flue and drainage options, and sufficient access to gas,
water, and electrical supplies.
Carefully consider the following factors when choosing an
installation location:
Compliance Requirements
This water heater must be installed by qualified personnel
in compliance with the applicable Laws and Regulations.
In general, these Laws and Regulations are the Basic Gas
Installation Standards, the Heating, Air Conditioning and
Domestic Water Installation Regulation and all other local
regulations.
Access to Utilities
Water–the installation location should be near where the
domestic water supply enters the building.
Gas–the installation location should be near where the gas
supply enters the building.
Electricity–the installation location should be near where the
electrical supply enters the building.
Humidity and Contact with Water
When installing the water heater, avoid places with excessive
humidity. The water heater has electric gas ignition components.
Water spray or droppings can get inside the water heater and
damage the ignition system. The water heater must be installed
in a way to ensure that the gas ignition system components
are protected from water (dripping, spraying, rain, etc.) during
operation and service.
If the water heater is installed in a very humid room (a shower
room or bathroom, for example), the Low Voltage regulation
and the Technical Building Code must be observed for correct
installation.
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 user
requires "instant" hot water, installation of a recirculation line
which circulates domestic hot water back to the water heater
from the furthest fixture is recommended. Insulate as much of
the hot water supply and recirculation lines as possible.
Adequate Drainage
The water heater produces a signi cant amount of condensate
during operation. This condensate must be removed from
the water heater, and suitably treated if national legislation
so requires. 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 damage that occur as a result.
For more information about condensate drainage, refer to
"3.5 Connecting the Condensate Drain Line" on page 27.
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 oors 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 ow.
Adequate Flue and Ventilation
No speci c ventilation is required in the room the water
heater is installed in. If it is installed in a cupboard or
compartment, no speci c ventilation is required, providing the
aforementioned dimensions are observed. The requirements
and recommendations stipulated in the Regulation for Heating
Installations in Buildings (RITE) and any other applicable
legislation in this eld must be observed.
Select a location that requires minima ue. Consider ue
restrictions caused by windows, doors, air intakes, gas meters,
foliage, and other buildings. For more information about ue
system, refer to "3.6 Flue System" on page 28.
To ensure adequate ue and ventilation, follow these guidelines:
Maintain proper clearances from any openings in the building.
Install the water heater with a minimum clearance of 300 mm
above an exterior grade or as required by local codes.
Do not enclose the ue termination.
Install the exhaust ue in an area that is free from any
obstructions, where the exhaust will not accumulate.
Do not install the water heater where moisture from the
exhaust may discolour or damage walls.
Do not install the water heater in bathrooms, bedrooms or
any other occupied rooms that are normally kept closed or
not adequately ventilated.
The requirements and recommendations stipulated in the
Regulation for Heating Installations in Buildings (RITE) and any
other applicable legislation in this eld must be observed.
Installing the Water Heater
15
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