Ao-smith 315795-000 MH User Manual download pdf (Page 23)

VENTING SYSTEM INSPECTION

At least once a year a visual inspection should be made of the venting

system. You should look for:

1. Obstructions which could cause improper venting. The

combustion and ventilation air ﬂ ow must not be obstructed.

2. Damage or deterioration which could cause improper venting or

leakage of combustion products.

3. Rusted ﬂ akes around top of water heater.

Be sure the vent piping is properly connected to prevent escape of

dangerous ﬂ ue gasses which could cause deadly asphyxiation.

Obstructions and deteriorated vent systems may present serious

health risk or asphyxiation.

Chemical vapor corrosion of the ﬂ ue 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.

If after inspection of the vent system you found sooting or

deterioration, something is wrong. Call the local gas utility to

correct the problem and clean or replace the ﬂ ue and venting before

resuming operation of the water heater.

BURNER INSPECTION

Flood damage to a water heater may not be readily visible or

immediately detectable. However, over a period of time a ﬂ ooded

water heater will create dangerous conditions which can cause

DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.

Contact a qualified installer or service agency to replace a

ﬂ ooded water heater. Do not attempt to repair the unit! It must be

replaced!

At least once a year a visual inspection should be made of the main

burner and pilot burner, see Figure 37.

PERIODIC MAINTENANCE

You should check for sooting. Soot is not normal and will impair

proper combustion.

Soot build-up indicates a problem that requires correction before

further use. Turn “OFF” gas to water heater and leave off until repairs

are made, because failure to correct the cause of the sooting can

result in a ﬁ re causing death, serious injury, or property damage.

FIGURE 37.

BURNER CLEANING

In the event your burner needs cleaning, follow these instructions:

If inspection of the burner shows that cleaning is required, turn the

gas control knob clockwise (

) to the “OFF” position, depressing

slightly.

NOTE: The knob cannot be turned from “PILOT” to “OFF” unless

knob is depressed slightly. DO NOT FORCE.

The burner needs to be removed for cleaning. Call a service agency

to remove and clean the burner and correct the problem that required

the burner to be cleaned.

HOUSEKEEPING

Vacuum around base of water heater for dust, dirt, and lint on a

regular basis.

INSTALLED IN SUITABLE AREA: To ensure sufﬁ cient ventilation

and combustion air supply, proper clearances from the water heater

must be maintained. See “Locating the New Water Heater” section.

Combustible materials such as clothing, cleaning materials, or

ﬂ ammable liquids, etc. must not be placed against or adjacent to

the water heater which can cause a ﬁ re.

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Ao-smith 315795-000 MH User Manual Page 23

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