Installing The Boiler; Choosing An Installation Location - Navien NCB-180 Installation & Operation Manual

2. Installing the Boiler

2.1 Choosing an Installation Location

When choosing an installation location, you must ensure that the
location provides adequate clearance for the boiler, adequate
venting and drainage options, and sufficient access to gas, water,
and electrical supplies. Carefully consider the following factors
when choosing an installation location:
Compliance Requirements
Local, state, provincial, and national codes, laws, regulations, and
●
ordinances.
National Fuel Gas Code, ANSI Z223.1-latest edition.
●
Standard for Controls and Safety Devices for Automatically Fired
●
Boilers, ANSI/ASME CSD-1, when required.
National Electrical Code.
●
For Canada only: B149.1 Installation Code, CSA C22.1 Canadian
●
Electrical Code Part 1 and any local codes.
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.
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 23.
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.
14 Installing the Boiler
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 the Boiler" on page 36.
To ensure adequate venting and ventilation, follow these
guidelines:
Maintain proper clearances from any openings in the building.
●
Install the boiler 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 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.
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 requires "instant" 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 20.