State SDV 75 70 NE/PE - Manual (Page 27)

27
Periodic Maintenance
Burner Cleaning
NOTE: Burner assembly must be handled carefully to
avoid damaging the hot surface ignitor.
In the event your burner needs cleaning, use the following
instructions:
If inspection of the burner shows that cleaning is required,
turn the gas control knob clockwise ( ) to the “OFF”
position.
Loose deposits on or around the burner can be removed by
carefully using the hose of a vacuum cleaner inserted
through the access door of the water heater. If the burner
needs to be removed for additional cleaning, call the local
gas utility or qualified service agent to remove and clean the
burner and correct the problem that required the burner to
be cleaned.
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 flow must not be obstructed.
2. Damage or deterioration which could cause improper vent-
ing or leakage of combustion products.
3. Rusted flakes around top of water heater.
At least once a year a visual inspection should be made of
the burner assembly. The drawing is for your reference.
You should check for sooting which is not normal and will
impair proper combustion.
Burner Inspection
L.P. Gas Control Valve & Burner
Assembly Replacement Information
WARNING
PROPANE (L.P.) GAS CONTROL VALVE AND BURNER
ASSEMBLY REPLACEMENT INFORMATION.
For Propane (L.P.) Gas Models Only:
Your water heater is equipped with a Propane (L.P.) gas
control valve and a main burner assembly with left hand
threads for the following fittings and their connections.
(1) The connection between the manifold and the gas
control valve (A to B) are left hand threads.
(2) The connection between the main burner orifice
and the manifold (C to D) are left hand threads.
For ordering these replacement parts, please refer to the
“Repair Parts” section of this manual.
WARNING
Soot build-up indicates a problem that requires correc-
tion 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 fire.
WARNING
Flood damage to a water heater may not be readily visible
or immediately detectible. However, over a period of time
a flooded water heater will create dangerous conditions
which can cause DEATH, SERIOUS BODILY INJURY, OR
PROPERTY DAMAGE. Contact a qualified service techni-
cian or contractor to replace a flooded water heater. Do
not attempt to repair the unit! It must be replaced!
WARNING
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 flue and vent-
ing before resuming operation of the water heater.
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.
WARNING
Obstructions and deteriorated vent systems may present
serious health risk or asphyxiation.
WARNING
Be sure the vent piping is properly connected to prevent
escape of dangerous flue gasses which could cause dead-
ly asphyxiation.
B
A
C
D