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14
Oil Fired Gas & Diesel • Rev. 4/7/2016
Final adjustments to burner include fuel pressure adjustment for controlling water temperature
(tighten fuel pressure adjustment screw slightly to increase desired output temperature) and air
band adjustment for combustion efficiency. A combustion test kit should be used for these final
adjustments. Check SPECIFICATIONS chart (page 7) for the burner oil pressure corresponding
to your model and be sure not to exceed this pressure. See included burner manual for more
information and a parts break down of the burner.
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.
General Maintenance and Care
If the water heater is likely to be exposed to freezing weather then it should be winterized
according to the winter pump/coil protection procedure in the previous section. Alternate
methods may not completely protect the components. Damage from freezing is not a warrantable
item.
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, 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 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.
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