Kenmore 33176 Installation Guide download pdf (Page 17)

VENTING

VENT DAMPERS - Any vent damper, whether it is operated

thermally or otherwise must be removed if its use inhibits proper

drafting of the water heater.

Thermally Operated Vent Dampers: This gas-fired water

heater has a thermal efciency at or above 80% which may

produce a relatively low ue gas temperature. Such temperatures

may not be high enough to properly open thermally operated

vent dampers. This would cause spillage of the ue gases and

may cause carbon monoxide poisoning.

Vent dampers must bear evidence of certication as complying

with the current edition of the American National Standard

ANSI Z21.66/CGA 6.14, cover electrically and mechanically

actuated vent dampers). Before installation of any vent damper,

consult your local Sears Service Center or the local gas supplier

for further information.

To insure proper venting of this gas-red water heater, the correct

vent pipe diameter must be utilized. Any additions or deletions

of other gas appliances on a common vent with this water heater

may adversely affect the operation of the water heater. Consult

your gas supplier if any such changes are planned.

For proper venting in certain installations, a larger diameter vent

pipe may be necessary. Consult your local Sears Service Center

or gas supplier to aid you in determining the proper venting for

your water heater from the vent tables in the current edition of

the National Fuel Gas Code ANSI Z223.1/NFPA 54.

Periodically check the venting system for signs of obstruction or

deterioration and replace if needed.

The combustion and ventilation air ow must not be obstructed.

The water heater with draft hood installed must be connected

to a chimney or listed vent pipe system, which terminates to the

outdoors. Never operate the water heater unless it is vented

to the outdoors and has adequate air supply to avoid risks of

improper operation, explosion or asphyxiation.

• For proper draft hood attachment, the draft hood legs may

be angled slightly inward.

• Place the draft hood legs in the receiving holes on the top

of the water heater. The legs will snap in the holes to give a

tight t. Secure the legs of the draft hood with the supplied

draft hood brackets.

• Place the vent pipe over the draft hood. With the vent pipe

in position, drill a small hole through both the vent pipe and

draft hood. Secure them together with a sheet metal screw,

see Figure 18.

FIGURE 18.

Obstructed or deteriorated vent systems may present serious

health risk or asphyxiation.

The vent pipe from the water heater must be no less than the

diameter of the draft hood outlet on the water heater and must

slope upward at least 1/4 inch per linear foot (21 mm per meter),

see Figure 19.

FIGURE 19.

All vent gases must be completely vented to the outdoors of the

structure (dwelling). Install only the draft hood provided with the

new water heater and no other draft hood.

Vent pipes must be secured at each joint with sheet metal screws.

There must be a minimum of 6 inches (153 mm) clearance

between single wall vent pipe and any combustible material.

Fill and seal any clearance 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 clearance specications. To insure a

tight t of the vent pipe in a brick chimney, seal around the vent

pipe with mortar mix cement.

Failure to have required clearances between vent piping and

combustible material will result in a re hazard.

Be sure vent pipe is properly connected to prevent escape of

dangerous ue gases which could cause deadly asphyxiation.

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Kenmore 33176 Installation Guide Page 17

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