State Industries GSX - Manual (Page 13)

13
BASIC INSTALLATION & OPERATION
Table 1:
BTUH Input
Minimum Square
Feet with
8’ Ceiling
Typical Room
with 8’ Ceiling
30,000 188 9 x 21
45,000 281 14 x 20
60,000 375 15 x 25
75,000 469 15 x 31
90,000 563 20 x 28
105,000 657 20 x 33
120,000 750 25 x 30
135,000 844 28 x 30
IMPORTANT:
•
The area must be open and be able to provide
the proper air requirements to the water heater.
Areas that are being used for storage or contain
large objects may not be suitable for water heater
installation.
• Water heaters installed in open spaces in buildings
with unusually tight construction may still require
outdoor air to function properly. In this situation,
outside air openings should be sized the same as
for a confined space.
• Modern home construction usually requires
supplying outside air into the water heater area.
• Room exhaust fans may effect air requirements.
Confi ned Space: For the correct and proper operation
of this water heater, ample air must be supplied for
the combustion, ventilation, and dilution of fl ue gases.
Small enclosures and confi ned areas must have two
permanent openings so that suffi cient fresh air can be
drawn from outside of the enclosure. One opening shall
be within 12 inches of the top and one within 12 inches
of the bottom of the enclosure.
The size of each opening (free area) is determined by
the total BTUH input of all gas utilization equipment
(i.e., water heaters, furnaces, clothes dryers, etc.) and
the method by which the air is provided. The BTUH
input can be found on the water heater rating plate.
Additional air can be provided by two methods:
1. All air from inside the building.
2. All air from outdoors.
12” MAXIMUM
PERMANENT
OPENINGS TO
THE OUTSIDE OR
ADDITIONAL
ROOMS WITHIN
THE BUILDING
CLOSET
OR
OTHER
CONFINED
SPACE
12” MAXIMUM
Combustion Air Requirements:
WARNING
Carbon Monoxide Warning
Water heater must be vented to outdoors.
Vent must be installed by a qualified technician using
the local and state codes or, in the absence of local
and state codes, the National Fuel Gas Code,
ANSI Z223.1 (NFPA 54) - current edition, and/or the
installation instructions.
Examples of a qualified technican include: gas
technicians, authorized gas company personel, and
authorized service persons.
Failure to so do can result in death or carbon monoxide
poisoning.
IMPORTANT: Air for combustion and ventilation must
not come from a fl ammable or corrosive atmosphere.
Any failure due to fl ammable or corrosive elements in
the atmosphere is excluded from warranty coverage.
The following types of installation (not limited to the
following) will require outdoor air for combustion due to
chemical exposure and may reduce but not eliminate
the presence of corrosive chemicals in the air:
• beauty
shops
• photo processing labs
• buildings with indoor pools
• water heaters installed in laundry, hobby, or craft
rooms
• water heaters installed near chemical storage areas
• water softeners
Combustion air must be free of acid-forming chemicals
such as sulfur, fl uorine, and chlorine. These elements
are found in aerosol sprays, detergents, bleaches,
cleaning solvents, air fresheners, paint, and varnish
removers, refrigerants, and many other commercial
and household products. When burned, vapors from
these products form highly corrosive acid compounds.
These products should not be stored or used near the
water heater, air inlet, or air intake path.
Combustion and ventilation air requirements are
determined by the location of the water heater.
The water heater may be located in either an open
(unconfi ned) area or in a confi ned area or small
enclosure such as a closet or small room. Confi ned
spaces are areas with less than 50 cubic feet for
each 1,000 BTUH of the total input for all gas-using
appliances.
Unconfi ned Space: A water heater in an unconfi ned
space uses indoor air for combustion and requires at
least 50 cubic feet for each 1,000 BTUH of the total
input for all gas appliances. The table below shows a
few examples of the minimum square footage (area)
required for various BTUH inputs.
Figure 7