Filter
Top Products
Installation Instructions (cont'd)
Venting (cont'd)
There must be a minimum of 6" clearance between single wall
vent pipe and any combustible material Fill and seal any clear-
ance between single wall vent pipe and combustible material
with mortar mix, cement, or other noncombustible substance.
For other than single wall, follow vent pipe manufacturer's clear-
ance specifications. To insure a tight fit of the vent pipe in a
brick chimney, seal around the vent pipe with mortar mix
cement.
_WARNING
Minimum clearances between the water heater and com-
bustible construction are I" at the sides and rear, 4" at the
front, and 6" from the vent pipe. Clearance from the top of the
jacket is 18"on most models. Note that a lesserdimension may
be allowed on some models. Refer to the label on the water
heater adjacent to the gascontrol valvefor allclearances.
_,WARNING
Failureto haverequired clearancesbetweenvent pipingand
combustiblematerial will result in a fire hazard.
Where an exhaust fan is installed in the same room as the
water heater, air will be drawn into the room through the
chimney. Air supply openings must be large enough to admit
air exhausted by the fan and that requiredby all gas burning
appliances. A down÷draft or back-draft will prevent proper
combustion, causing soot wh_h may result in serious damage
to the water heater.
Where continuous or intermittent backdraft is found to exist,
check chimney conditions. In some cases a blower type flue
gas exhauster must be employed between the appliance and
t_e stack to assureproper venting and correct combustion.
Combining vents as shown below is satisfactory, providing the
basic rules of good venting are observed. In eiti_er case, the
vertical rise above draft hood (X) before any fittings, should be
as great as possible. All venting connections should be made
in accordance with local codes and ordinances.
When vents are combined, area of the combined vent
should be equal to area of the largest single vent, plus 50%
of area of all others joining it.
EXAMPLE To combine two 6 vents with an 8' vent, the
area of a combined vent should be one half
area of two 6" vents (14+14) plus area of 8"
vent (50) = 78 .sq.inches. Referring to chart, 78
sq. inches requires a 10" diameter vent.
VENT
SIZE
5"
6"
7"
8"
9"
SQUARE
INCHES
20
28
38
50
64
VENT
SIZE
10"
12"
14"
16"
18"
SQUARE
INCHES
79
113
154
201
254
_, WARNING
A gas water heater cannot operate properly without the cor-
rect amount of air for combustion. Do not install in a confined
area sucha closet, unlessyou provide air as shownin the "Facts
to Consider About the Location" section. Never obstruct the
flow of ventilatlon air. If you have any doubts or questionsat all,
call your gascompany. Failure to provide the proper amount of
combustion air can result in a fire or explosion and can cause
DEATH, SERIOUS BODILY INJUR_,OR PROPERTY DAMAGE.
•,WARNING I
Be sure vent pipe is properly connected to prevent escape of I
dangerous flue gaseswhich could cause deadly asphyxiation. I
_,WARNING
Chemical vapor corrosion of the flue and vent system may
occur if air for combustion contains certain chemical vapors.
Spray can propellants, cleaning solvents, refrigerator and air
conditioner refrigerants, swimming pool chemicals, calcium
and sodium chloride, waxes, bleach, and processchemicalsare
typical compounds Whichare potentially corrosive.
Gas Piping
_,WARNING
Make sure the gas supplied is the same type listed on the
model rating plate. The inlet gas pressure must not exceed
10.5 inches water column (2.6kPa) for Natural Gas and 13
inches water column (3.5kPa) for Propane (L.R) Gas. The
minimum inlet gas pressure listed on the model rating plate
isfor the purpose ofinput adjustment.
•,WARNING , I
If the gas control valve is subjected to pressures exceeding ½[
pound per square inch (3.SkPa), the damage to the gascon- I
tro valve cou d resu t in a fire or explosion from leaking gas. I
AWARNING
If the main gas line shutoff serving all gas appliances is used,
alsoturn "OFF" the gasat each appliance. Leave all gasappli-
ancesshut off until the water heater installation iscomplete.
15