American Standard VAPORSHIELD Residential 30 Operating, Installation And Service Manual page 12

7
NOTE: If the equipment room is located against
an outside wall and the air openings communicate
directly with the outdoors, each opening shall have
a free area of not less than one square inch per
4,000 BTU per hour of the total input rating of all
equipment in the enclosure.
Ilustrations for Figures 5-8 copyright by the
American Gas Association. Used by permission of
the copyright holder.
DISCHARGE
WARNING:
VENTING
fuels.Air for combustion is taken from the immediate water heater location or is ducted in from the outside
"Combustion Air Supply and Ventilation").
important factor in the life of the unit.
The vent pipe must be installed according to all local and state codes or, in the absence of local and state codes, the
"National Fuel Gas Code",ANZI Z223.I (NFPA 54)-lates edition. The vent pipe installation must not be obstructured
installed using the manufacturer's instructions and local codes, rules, or regulations.
Important: If you lack the necessary skills required to properly install this venting system, you should not porceed, but
MECHANICAL EXHAUSTING AND
FIREPLACES
The operation of air-moving devices such as
of gas utilization equipment.
Consequently, special attention must be given
to conditions these devices may create to avoid
unsatisfactory operation of the equipment.
PURCHED
OF
When removing purged gases from a piping system, care should be taken no to create a hazardous condition, such
VENT PIPE SYSTEM
The wate heater must be connected to the chimney. The vent pipe from the heater to the chimney (vent connector)
must be no less than the diameter of the drafthood outlet on the heater and should slope upward to the chimney at
Due to great variances in installations, unforeseeable by the manufacturer of the water heater, increased size vent
connectors and pipes may be necessary for proper venting.
Consult your local utility.They will aid you in determining the proper venting for your heater from the vent tables
in the American National Standard Z223.I (NFPA 54) "National Fuel Gas Code".
manufacturer of this water heater.
Chimney of Gas Vent
FIGURE 8
Equipment Located in Confined Spaces;
All Air From Outdoors.
GASES
REVERSE
FLOW
NATURAL DRAFT
EQUIPMENT
Furnace
Water
Heater
The use of these devices is not permitted by the
POTENTIAL HAZARDOUS
DOWN DRAFT OPERATION
• EXHAUST FANS
• VENTILATION SYSTEM
• CLOTHES DRYERS
• FIREPLACES
EXHAUST
HOOD
• OTHERS
Outlet Air Duct
Inlet Air Duct
(see