Rheem GG Series - Manual (Page 8)

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.
8
Installing the water heater.
Customer Service
T
roubleshooting Tips
Care and Cleaning
Operating Instructions
Installation Instructions
Safety Instructions
Combustion and Ventilation Air
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.
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.
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
″
below 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 are to be
covered with a protective screen or
grill, the net free area 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 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.