If the furnace is to be installed in a crawl space, consult local codes. (Use of a concrete pad 1" to 2" thick is recommended.)
If the furnace is to be suspended from the ceiling, it will be necessary to use steel pipe straps around each end of the furnace. These straps should be attached to the furnace with sheet metal screws and to the rafters with bolts. The furnace may also be suspended by using an angle iron frame bolted to the rafters. (See Table on page 3 for size and weight of furnace.) Care must be taken to allow for service access.
If a furnace is to be installed in a residential garage, it must be installed so the burners and the ignition source are located not less than 18" above the floor and the furnace must be located or protected to avoid physical damage by vehicles.
Do not place combustible material on the furnace jacket. Failure to comply with this warning will create a fire hazard.
This furnace is not watertight and is not designed for outdoor installation. This furnace shall be installed in such a manner as to protect the
electrical components from water. Outdoor installation would lead to a hazardous electrical condition and to premature furnace failure.
AIR FOR COMBUSTION AND VENTILATION
Contaminated Combustion Air:
This furnace is not to be installed in a structure defined as having contaminated combustion air. 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
•
•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.
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.
20571201 | Issue 0527 | Page 8 of 28 |
