State GS6 75 URRBS - Manual (Page 19)

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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 17
BURNER FLAMES
Inspect burner fl ames through viewport. Flames should be very
small with a blue haze and small amounts of yellow or orange at
the edges. After several minutes of operation the burner screen
may glow red. If large fl ames are observed at anytime, shut off
unit and call a qualifi ed person.
BURNER CLEANING
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.
NATURAL GAS BURNER (ULTRA LOW NOX)
Check the burner to see if it’s dirty or clogged. The burner may be
cleaned with a soft paint brush, see Figure 18. Do not use a wire
brush or any tool that may damage the burner screen. Important: Do
not use the burner if the burner screen is damaged. NOTE: Damage
may be rips or holes in the burner screen. Discoloration is normal.
FIGURE 18
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 gases 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 qualifi ed 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 17.
PERIODIC MAINTENANCE
Flame Characteristics
Correct Flame
Red/Orange
Burner Pilot Assembly
Use brush on this surface
Natural Gas (Low Nox)
Burner Door Assembly