Venting For Combustion Air - Navien NCB-190/060H Installation & Operation Manual

5. Venting for Combustion Air

Additional Guidelines for Combustion Air
Combustion air piping to the outside is
●
recommended. (Direct Venting)
The boiler may be installed with a single pipe
●
carrying the flue products to the outside while
using combustion air from the equipment room.
In order to use the room air venting option on
page 62, specific conditions and considerations
must be followed.
WARNING
Do not install the boiler or combustion
●
air piping in areas with contaminated
air(containing a high level of dust, sawdust,
sand, flour, aerosols, fluorine or chlorine
compounds), as contaminants can cause
severe problems.
Pool and laundry products and common
●
household cleaning products can contain
corrosive compounds. If any of the chemicals
or vapors enter the boiler, this can result in
serious product damage that can even cause
the potential for flue gas leakage in extreme
cases.
To prevent the potential of severe personal
injury or death, check for areas and products
listed in the following tables before installing
the boiler or air inlet piping.
If contaminants are found in the
combustion air, you MUST Remove
contaminants permanently or Relocate air
inlet and vent terminations to other clean
areas.
The warranty does not cover damage caused
●
by air contaminants.
If you must install the boiler in an area with
●
contaminated air, use direct venting to
supply clean air from outside the building.
We recommend regular filter cleaning and
maintenance in these areas.
Corrosive Contaminants
Muriatic acid/hydrochloric acid
Refrigerant leaks
Chlorine-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
Varnish removers or paint
Adhesives used to fasten building products and
other similar products
Chlorine-based swimming pool chemicals
Permanent wave solutions
Anti-static fabric softeners used in clothes dryers
Calcium chloride used for thawing
Spray cans containing chloro/fluorocarbons
Cements and glues
Sodium chloride used for water softening
Chlorinated waxes/cleaners
Corrosive Sources
Remodeling areas
Refrigeration repair shops
New building construction
Metal fabrication plants
Laundry areas and establishments/dry cleaning
Swimming pools
Auto body shops
Furniture refinishing areas and establishments
Garages with workshops
Plastic manufacturing plants
Beauty shops
Photo processing plants
Venting for Combustion Air 57