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 Figure 5-110. Heating boiler burner unit and mounting.
(2)
Cleaning.
5-70. Heating System
(a) Keep outside of boiler clean at all times.
a. Boiler.
(b) After six months of operation, clean
(1) Draining and filling. Once each month drain
firebox and all parts in contact with hot gases of all
approximately one gallon of water from the bottom drain of
accumulations of soot and carbon.
the boiler, then fill until the water gage shows full.
5-152
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