Kenmore 153.337002 - Manual (Page 15)

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 materia!
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.
AWARNING
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 diat a lesser dimension may
be allowed on some models. Refer to the label on the water
heater adjacent to the gas control valve for all clearances.
AWARNING
Failure to have required clearances between vent piping and
combustible material 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 required by ail gas burning
appliances. A down-draft or back-draft will prevent proper
combustion, causing soot whjfh 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
the stack to assure proper venting and correct combustion.
Combining vents as shown below is satisfactory, providing the
basic rules of good venting are observed. In either case, the
vertical rise above draft hood (X) before any fittings, should be
as great as possible. Ali 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
h -14) plus area of 8"
vent (50) = 78 sq. inches. Referring to chart, 78
sq. inches requires a 10" diameter vent.
VENT SQUARE
SIZE INCHES
5" 20
6" 28
7" 38
8" 50
9" 64
VENT SQUARE
SIZE INCHES
10" 79
12" 113
14" 154
16" 201
18" 254
AWARNING
A gas water heater cannot operate properly without the cor­
rect amount of air for combustion. Do not install in a confined
area such a closet, unless you provide air as shown in the “Facts
to Consider About the Location” section. Never obstruct the
flow of ventilation air. If you have any doubts or questions at all,
call your gas company. Failure to provide the proper amount of
combustion air can result in a fire or explosion and can cause
DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.
AWARNING
Be sure vent pipe Is properly connected to prevent escape of
dangerous flue gases which could cause deadly asphyxiation.
AWARNING
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 process chemicals are
typical compounds which are potentially corrosive.
Gas Piping
AWARNING
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.P.) Gas. The
minimum inlet gas pressure listed on the model rating plate
is for the purpose of input adjustment. ___________________ ^
AWARNING
If the gas control valve is subjected to pressures exceeding '/i
pound per square inch (3.5k^), the damage to the gas con­
trol valve could result in a fire or explosion from leaking gas.
AWARNING
If the main gas line shutoff serving all gas appliances is used,
also turn “OFF” the gas at each appliance. Leave all gas appli­
ances shut off until the water heater installation is complete.
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