GAMA Gas-Fired Furnace, User'S Information Manual

AIR FOR COMBUSTION AND VENTILATION

Contaminated  Combustion  Air:

If the furnace is to be installed in a structure defined

as having contaminated combustion air, the furnace must
use the direct vent (two pipe) configuration using non-
contaminated outside air for combustion. Allowing
exposure to substances containing chlorine or fluoride
could harm the furnace and void the warranty.
Substances to avoid include, but are not limited to:

•

Permanent wave solutions

•

Chlorinated waxes and cleaners

•

Chlorine based swimming pool chemicals

•

Water softening chemicals

•

De-icing salts or chemicals

•

Carbon tetrachloride

•

Halogen type refrigerants

•

Cleaning solvents (such as perchloroethylene)

•

Printing inks, paint removers, varnishes, etc.

•

Hydrochloric acid

•

Cements and glues

•

Antistatic fabric softeners for clothes dryers

•

Masonry acid washing materials

•

Unrefined gases

Contaminated combustion air may cause premature
failure of the heat exchanger that may lead to a
hazardous condition and/or bodily harm, or loss of
life.

Adequate  Ventilation  and  Combustion  Air:

This section is provided to give guidelines for the

introduction of air for ventilation and combustion air. The
total quantity of air provided to the installation area must
equal the requirements of all gas appliances in the area.

Adequate facilities for providing air for combustion

and ventilation must be provided in accordance with the
latest edition of the  National   Fuel   Gas   Code   ANSI
Z223.1/NFPA54 or CSA B149.1 Natural Gas and Propane
Installation  Codes, or applicable provisions of the local
building codes.

The furnace shall be installed in a location in which

the facilities for ventilation permits satisfactory combustion
of gas, proper venting and maintenance of ambient
temperature at safe limits under normal conditions of use.
The furnace shall be located so as not to interfere with
proper circulation of air.

In addition to air needed for combustion, ventilation in

the form of process air must be provided as required for:
cooling of equipment or material, controlling dew point,
heating, drying, oxidation or dilution, safety exhaust and
odor control. Air must be supplied for ventilation,
including all air required for comfort and proper working
conditions for personnel. 

Direct venting (two pipe)

allows for the combustion air to be supplied directly
to the furnace from the outdoors. Ventilation needs
only to be considered when furnace is installed as
direct vent (two pipe). Non-direct venting (one pipe)
requires both combustion and ventilation air
requirements from the furnace location.

For purposes of this instruction the following

definitions apply:

Confined Space:

A space whose volume is less
than 50 cubic feet per 1000
Btu/hr of the aggregate input
rating of all appliances installed
in that space.

Unconfined Space:

A space whose volume is not
less than 50 cubic feet per 1000
Btu/hr of the aggregate input
rating of all appliances installed
in that space. Rooms
communicating directly with the
space in which the appliances
are installed, through openings
not furnished with doors, are
considered a part of the
unconfined space.

If the installation area meets the definition of

"Unconfined Space" and does not have additional air
requirements as described, the furnace may be installed
without making special provisions for combustion and
ventilation air.

Whenever this furnace is installed in an area along
with one or more gas appliances, the total Btu/hr
input of all appliances (using maximum input of
each appliance) must be included when determining
the free area requirements for combustion and
ventilation air openings.

Do not block the combustion or ventilation air
openings in the furnace. Any blockage will result in
improper combustion and may result in a fire
hazard or unsafe condition.

20558801

Issue 0442

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