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3. Installing the Boiler
3.1 Choosing an Installation Location
When choosing an installation location, you must ensure
that the location provides adequate clearance for the boiler,
adequate ueing and drainage options, and su cient access to
gas, water, and electrical supplies.
Carefully consider the following factors when choosing an
installation location:
Compliance Requirements
This boiler must be installed by quali ed 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 boiler, avoid places with excessive humidity.
The boiler has electric gas ignition components. Water spray or
droppings can get inside the boiler and damage the ignition
system. The boiler 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 boiler 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 boiler near xtures that deliver or use hot water,
such as bathroom, kitchen, and laundry room faucets. Select
a location that minimises the water piping required between
major xtures. 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 boiler from the
furthest xture is recommended. Insulate as much of the hot
water supply and recirculation lines as possible. For more
information about the water supply, refer to "4.2 Installing a
System Application" on page 22.
18 Installing the Boiler
Adequate Drainage
The boiler produces a signi cant amount of condensate during
operation. This condensate must be removed from the boiler,
and suitably treated if national legislation so requires. 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 damage that occur as a result. For more
information about condensate drainage, refer to "4.3 Connecting
the Condensate Drain Line" on page 22.
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 oors 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 ow.
Adequate Flue and Ventilation
The boiler must be installed in a su ciently ventilated area with
openings directly to the outside of the building (as required by
the Gas Installations Regulation). The boiler must be located so
that the grilles of the premises are not obstructed and normal
boiler maintenance is possible even if installed between items
of furniture.
Select a location that requires minimal ue. Consider ue
restrictions caused by windows, doors, air intakes, gas meters,
foliage, and other buildings. For more information about ue
system, refer to "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 boiler 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 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.
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.
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