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Installation
Instructions
(cont'd)
Combustion Air and
Ventilation for Appliances
Located in Confined Spaces (cont'd)
Figure
7 ]
CHlUNEY
O_ GAS VENT
V_NTILATION
LOUVERS
(each end of a_,c)
WATER HEATER
.FURNACE
At.T INLET_IR
VE_CTILATIONLOUVERS
1. When directly communicating
with the outdoors,
each open-
ing shall have a minimum
free area of 1 square inch per 4,000
BTU per hour of coral input
rating of all equipment
in the
endosure.
(See Figure 7.)
2. When
communicating
with the outdoors
through
vertical
ducts,
each opening
shall have a minimum
free area of 1
square inch per 4,000 BTU per hour of total input rating of
all equipment
in the enclosure. (See Figure 8.)
Figure 8 !
_CHIMNEY
OR GAS VENT
VENTILATION
LOUVERS
{each
end
ol _t_
I
WATEN
HEATER
FURNACE
INLET AIR DUCT
above
floor)
ZI
I
I
3. When communicating
with the outdoors
through
horizontal
ducts,
each opening
shall have a minimum
free area of 1
square inch per 2,000 BTU per hour of total input rating of
all equipment
in the enclosure.
(See Figure 9.)
Figure
9 ]
CHIMNEY
OR GAS VE I
_
OUTLET
AIFt OklCT
--
INLET AIR DUCT
4. When ducts are used, they shall be of the same cross-sectional
area as the free area of the openings
to which
they connect.
The minimum
short side dimension
of rectangular
air ducts
shall not be less than 3 inches. (See Figure 9.)
5, louvers
and (;rillcs:
In calctilatin_
l:ree area, co[lside,ation
shall he given to the blocking
ef(_'ct of louvers, grilles or
screens m3te,_tin_ openings. Screens used shah not bc smaller
than I/. itlch n'_esrJ. If the flee area through
a design of louver
or grille is known,
it should
be used in calculating
the size
(H_ening requ0-ed
to provide
the free area specified.
If the
dcslgu and fice area is
not
kllown,
it may be assumed
that
wood louvers will h_ 20 25 percent t_ec area and metal louvers
and grilles \viii ]lave 60-75
percent
free area. Louvers
and
grilles shall be fixed in the open position or interlocked
with
the equipment
so that they arc opened
automatically
during
equipment
operation.
6. Special
(]onditions
Created
hy Mechanical
Exhausting
or
Fireplaces:
Operation
of exhaust
leans, ventilation
systems,
clothes dryers or fireplaces may create conditions
requiring
special attenthm
m avoid unsatisfactory
operation
of installed
gas utilization
equipment.
Water
Piping
AWARNING
HOTTER WATER CAN SCALD; Water heaters are intended to
produce hot water. Water heated to a temperature which will
satisfyclothes washing,dish washing,and other sanitizing needs
can scald and permanently injure you upon contact. Some peo-
pleare more likely to be permanently injured by hot water than
others. These include the elderly,children, the infirm, or physical-
ly/mentally handicapped. If anyone using hot water in your home
fits into one of these groups or if there is a localcode or state law
requiring a certain temperature water at the hot water tap, then
,ou must take special precautions.In addition to usingthe lowest
mssibletemperature setting that satisfiesyour hot water needs,
a means such as a mixing valve, shouldbe used at the hot water
taps used by these people or at the water heater. Mixing valves
are available at plumbing supplyor hardware sto_s. Follow man-
ufacturers instructions for installation of the valves. Before
changing the factory setting on the thermostat,
read the
"Temperature Regulation" section in this manual.
This water heater shall not be connected
to any heating
systems
or component(s)
used with
a non-potable
water
heating
appliance.
If a water heater is installed in a closed water supply system; such as
one having a back flow preventer, check valve, water meter with a
check valve, etc.., ill the cold water supply; means shall be provided
to control thermal expansion. Contact the local utility or local Sears
Service Cemer oil how to control this situation.
NOTE:
To protect
against
untimely
corrosion
of hot and
cold water fittings,
it is strongly
recommended
that di-elec-
tric unions
or couplings
be installed
on this water heater
when connected
to copper pipe.
NOTE:
If using copper
tubir, g, solder tubing
to an adapter
before attaching the adaptor to the cold water inlet connection.
Do not solder
the cold water supply line direcdy to the cold
water inlet. It will harm the dip tube and damage the tank.
12
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