Thermo Pride OMD-70 - Manual (Page 23)

All installations and services must be performed by qualified service personnel.
If possible, install the tubing under the floor. Specific information on piping, fuel pump
connections, lift capabilities and tank installations is provided in the fuel pump manufacturer’s
instructions.
If the oil tank is located inside the building and the tank capacity is between 10 and 660
gallons, it shall not be located within 5 feet horizontally from any source of heat, or oil-
burning appliance. Furthermore, the oil tank shall not block access to utility service
meters, switch panels, and shutoff valves.
If an underground tank used, the top of the tank should be below all piping in order to prevent oil
discharge through a broken connection. Underwriters Laboratories requirements now stipulate
that all 275 gallon and larger tanks have a bottom outlet. This is to prevent the accumulation of
condensate, which causes the tank to rust. It is also recommended to use a water trap or additives
to prevent condensate accumulation.
If the tank is above the burner, and gravity oil feed to the burner is permitted, a single line
system may be used. The line should have a gradual slope downward of approximately 1/2 inch
per foot, or more, to a point directly below where it is connected to the pump. Installing the line
with a downward slope will help prevent the formation of air pockets in the line.
IMPORTANT: An oil safety valve or a delayed-action solenoid valve is required with all
gravity feed oil supply systems.
IMPORTANT: The oil storage tank must be free of water, sludge and scale to prevent
excessive wear and possible damage to furnace oil pump and burner nozzle. A fuel oil filter
installed in the oil supply line to the burner is required.
OIL FILTER: For all installations, use a low micron, oil filter with the capacity to trap particles
10 microns in diameter, or greater. Filtering the oil supply helps to prevent nozzle clogging.
Install the oil filter inside the building between the tank shutoff valve and the burner. The filter
cartridge should be replaced at least once a year. The filter body should be thoroughly cleaned
before installing a new cartridge.
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