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INSPECTIONAND MAINTENANCEPROCEDURES
It is a good practice to make a periodic inspection of the heater. It is recommended that the home owner or user checks the heater after the first and third month of operation, and then on an annual basis, or more often if desired. It is also recommended to have a qualified service agency check the heater before each heating season, or at anytime there may be an indication of a problem.
1.Keep heater area free from combustibles and flammable liquids.
2.Be certain that All combustion and ventilation air openings are free and clear of all obstructions. Screens, covering same, must be clean.
Monthly:
1. Make visual inspection of burner flames.
Fig. #8144
a.Flame should be blue with light yellow tips.
b.Yellow flame indicates clogged air openings.
c.Lifting of flame indicated high gas pressure. Check using manometer at 1/8 in. NPT tapping located between the gas valve and the burners. Pressure should be 3.7 in. W.C.
2.Inspect and operate all controls and gas valves.
3.Visually inspect system for water leaks
Six Months:
1.Heat Exchanger Surfaces.
a.Shut off electric and gas supply to heater.
b.Examine external surfaces
2.Preliminary examination maybe done by using a mirror and a light in the burner area.
3.Remove venting, heater jacket top, flue collector and heat exchanger baffles. Remove inspection baffles.
c.If surfaces are sooted or foreign material is lodged in fins, cleaning is required.
To clean:
A.Remove burner tray.
-Disconnect gas control valves and pilot valves by breaking at unions.
-Disconnect wiring from gas valves.
-Remove burner tray retention screws.
-Slide tray from heater carefully to avoid disturbing or damaging IID.
B.Remove tube bundle.
-Disconnect
-Slide tube bundle away from
-Washdown external surfaces of tube bundle.
-Inspect interior surfaces of tubes. Clean deposits over 1/16" thickness.
-Clean tubes using tube cleaning kit.
C. Ream tubes by using auger bit.
D.Complete cleaning by wire brushing to remove all debris.
E.Immerse tube bundle in
NOTE: DO NOT wire brush external surfaces. Steam cleaning is a recommended procedure.
F. Replace tube bundle using the reverse of the aboveprocedures.
G.Before replacing burner tray clean burners.
4.Flow switch should be removed and checked.
5.Low water cutout, if provided, should be removed and checked.
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