High Altitude Installations; Combustion Air And Ventilation; Vent Terminal Clearances; Dv Termination Safety Cover - A.O. Smith GDV Instruction Manual

VENTILATING AIR. ADEQUATE AIR FOR COMBUSTION
AND VENTILATION MUST BE PROVIDED FOR SAFE
OPERATION.

HIGH ALTITUDE INSTALLATIONS

Installations above 7,700 ft. require replacement of the burner
orifi ce in accordance with the current edition of the National Fuel
Gas Code ANSI Z223.1/NFPA 54. Failure to replace the orifi ce
could result in improper and ineffi cient operation of the appli-
ance, producing carbon monoxide gas in excess of safe limits,
which could result in serious personal injury or death. Contact
your gas supplier for any specifi c changes which may be re-
quired in your area.

COMBUSTION AIR AND VENTILATION

When determining the installation location for a direct vent water
heater, snow accumulation and drifting should be considered in
areas where applicable.

VENT TERMINAL CLEARANCES

The vent system must terminate so that proper clearances are
maintained as cited in local codes or the current edition of the
National Fuel Gas Code ANSI Z223.1/NFPA 54 as follows:
Be sure venting is properly connected to prevent escape of dan-
gerous fl ue gases which could cause deadly asphyxiation.

DV TERMINATION SAFETY COVER

A Safey cover (see Figure 11) is available to prevent accidental
contact with the vent terminal. Contact your Customer Service
Department for ordering information.
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FIGURE 10
FIGURE 11