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 gas control valve for all clearances.
_,WARNING
Failureto haverequired clearancesbetween vent 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
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.
_, 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 gas company. 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.
•,WARNINGI
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 process chemicals are typical compounds Which are potentially corrosive.
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 | SQUARE | VENT | SQUARE |
SIZE | INCHES | SIZE | INCHES |
5" | 20 | 10" | 79 |
6" | 28 | 12" | 113 |
7" | 38 | 14" | 154 |
8" | 50 | 16" | 201 |
9" | 64 | 18" | 254 |
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
10.5inches 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 is for the purpose of input adjustment.
•,WARNING | , I |
If the gas control valve is subjected to pressures exceeding ½ [ pound per square inch (3.SkPa), the damage to the gas con- 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, 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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