Filler Pipe
The filler pipe is the filling connection located on the top of the oil
supply tank and terminating above the ground level at least 2 ft from the outside building wall. This is commonly a 2-in-diameter pipe of a design and material specified by the local authorities.
Generally, the specifications will mandate the use of a corrosion- resistant material.
It is important that the filler pipe be connected to one opening and the vent pipe to a separate opening on the tank. No cross-connection of vent pipe is permitted with the filler pipe or the return line from the oil burner. Some authorities demand double-swing connections at the oil supply tank.
The termination point of the filler point at ground level should be equipped with a watertight metal cap. The termination point should be of such design that oil spillage is minimized when the oil hose is disconnected.
Tank Vent Pipe
The vent pipe is attached to the oil supply tank at a point separate
from that of the filler pipe, and it should terminate at a point above the ground at least 2 ft from the outside wall of the building. The vent pipe must be equipped with an approved vent hood or weatherproof cap to prevent water and other contaminants from entering the pipe and gaining access to the oil supply tank.
Oil Filter
A cartridge-type oil filter should be installed on the fuel line inside the building and as close to the fuel tank as possible. One filter is adequate on oil burners operating at more than 1.00 gph.
Change the filter cartridge at least once a year. The filter body should be thoroughly cleaned before a new cartridge is installed.
Note
A cartridge-type oil filter in the oil line will prevent sludge in the oil clogging the fuel pump strainer or the oil burner nozzle. Both of these problems are a common cause of system failure.
Blowers and Motors
Both direct-drive and belt-drive blowers are used with oil-fired furnaces. These blowers and motors are identical to those used in gas- fired furnaces. Read the section Blowers and Motors in Chapter 11, “Gas Furnaces” for additional information.