GE Powervent AP13787 - Manual (Page 8)

8
Installing the water heater.
Combustion and Ventilation Air
Ventilation (ambient) air temperature
must be 100°F or less. Proper operation
of the water heater requires air for
combustion and ventilation. Provisions
for combustion and ventilation air must
comply with referenced codes and
standards.
DO NOT block or obstruct any of the
combustion air inlet openings located
around the perimeter of the water
heater. A minimum of 1” is required
between these combustion air inlet
openings and any obstruction.
NOTICE: If the water heater is installed
in an unconfined space within a building
of conventional frame, masonry or
metal construction, infiltration air is
normally adequate for proper
combustion and ventilation. If the water
heater is installed in a confined space,
provisions for combustion and
ventilation air must be made.
DO NOT obstruct or block the
Flammable Vapor Sensor.
A confined space is one having a volume of
less than 50 cubic feet per 1000 Btuh of
the aggregate input of all appliances
within that space.
The air must be supplied through two
permanent openings of equal area. One
is to be located within 12” above the floor
and the other is to be located within 12”
from the ceiling.
The minimum net free area of each opening
must not be less than one square inch per
1000 Btuh of the total input rating of all
the appliances in the enclosure (but not
less than 100 square inches), if each
opening communicates with other
unconfined areas inside the building.
Buildings of unusually tight construction
shall have the combustion and ventilation
air supplied from outdoors, or a freely
ventilated attic or crawl space.
If air is supplied from outdoors, directly or
through vertical ducts, there must be two
openings located as specified above and
each must have a minimum net free area
of not less than one square inch per
4000 Btuh of the total input rating of all
the appliances in the enclosure.
If horizontal ducts are used to
communicate with the outdoors, each
opening must have a minimum net free
area of not less than one square inch per
2000 Btuh of the total input rating of all
the appliances in the enclosure. If ducts
are used, the minimum dimensions of
rectangular air ducts shall not be less
than 3”.
NOTICE: If the duct openings which
supply combustion and ventilation air
are to be covered with a protective
screen or grill, the net free area
(openings in the material) of the
covering material must be used in
determining the size of the openings.
Protective screening for the openings
MUST NOT be smaller than 1/4”mesh to
prevent clogging by lint or other debris.
Corrosive Atmospheres
The air in beauty shops, dry cleaning
establishments, photo processing labs,
and storage areas for liquid and powdered
bleaches or swimming pool chemicals often
contain such halogenated hydrocarbons.
An air supply containing halogenated
hydrocarbons may be safe to breathe,
but when it passes through a gas flame
corrosive elements are released that
will shorten the life of any gas burning
appliance.
Propellants from common spray cans or
gas leaks from A/C and refrigeration
equipment are highly corrosive after
passing through a flame.
The water heater warranty is voided when
failure of the heater is due to operation in
a corrosive atmosphere.
NOTICE: The water heater
should not be installed
near an air supply
containing halogenated
hydrocarbons.
Inspect Shipment
Inspect the water heater for possible damage. Check the markings on the rating plate
of the water heater to be certain the type of gas supplied corresponds to the water
heater requirements.
Customer Service
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