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26
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 ow must not be obstructed.
2. Damage or deterioration which could cause improper venting or
leakage of combustion products.
Be sure the vent piping is properly connected to prevent escape of
dangerous ue gasses which could cause deadly asphyxiation.
Obstructions and deteriorated vent systems may present serious
health risk or asphyxiation.
Chemical vapor corrosion of the 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 ue and venting before
resuming operation of the water heater.
BURNER OPERATION AND INSPECTION
Flood damage to a water heater may not be readily visible or
immediately detectable. However, over a period of time a 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
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 the hot surface igniter assembly for proper ame
characteristics and ignition sequences. This can be done by removing
the Outer Door and viewing the main burner operation through the
Viewport on the Inner Door, see Figure 1. The main burner should
provide complete combustion of gas, ignite rapidly, give reasonably
quiet operation, and cause no excessive ame lifting from the burner
PERIODIC MAINTENANCE
ports. If the proper ame characteristics are not evident, see Figure
22, make sure that the ow of combustion and ventilation air is not
blocked.
You should also check for sooting. Soot is not normal and will impair
proper combustion. A visual inspection of the main burner and HSI
igniter assembly should also be done at least once a year, see
Figure 22.
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 re causing death, serious injury, or
property damage.
FIGURE 22.
BURNER CLEANING
In the event your burner or burner air openings require cleaning, turn
the blower switch to the “OFF” position and allow the burner to cool.
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.