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QB Oil Fired Water Heaters • Rev. 4/13/2016
If the burner floods with oil:
run machine with heat on until all excess oil is burned off (this can
take up to a couple of hours). If excess oil is not properly dealt with, the ceramic casing can absorb
excess oil, causing a fire hazard. DO NOT LEAVE MACHINE UNATTENDED WHILE
MACHINE IS FLOODED.
Water Condition
Use a softener on your water system if local water is known to be high in mineral content. The
advantages of soft water are very beneficial: prevents scale buildup in heater coil, cleans better with
considerably less detergent, and it prevents streaking on painted surfaces and glass when rinsing.
Descaling Heater Coil Procedure
NOTE: Descaling of the heater coil is to be done by authorized and trained burner
professionals only.
The best way to acidize the coil is with a circulation pump capable of handling acids.
1. Fill a plastic container with a suitable acid diluted with water to desired strength.
2. Connect discharge from the circulating pump to the hot water outlet on the water heater with a
suitable hose. Connect the inlet of the circulating pump to the acid container with suction hose from
the pump module and use it as a return hose to the acid container. As acid dissolves the scale it
becomes neutralized, so about every five minutes add more acid to the container until all the scale
has been removed from the coil. Flush out coil thoroughly with water after descaling.
