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A fuel or tank gauge is recommended for easy
checking of the fuel level. Check the gauge
reading with a dip stick.
Locate the storage tank conveniently near the
home. For above ground fuel tank installations,
the tank may rest three to four inches off the
ground. Fuel tanks may also be buried if
properly coated to resist corrosion. For below
ground fuel tank installations, the vertical di-
mension from the bottom of the tank to the fuel
pump must not exceed ten feet. Keep the tank
filled especially in the summer to reduce the
accumulation of condensation.
Fuel Line Hook-Up: One Line System
The one line system is highly recommended
where vertical lift, from bottom of tank to pump,
is not more than eight feet. A single line hookup
has the advantage of costing less and giving
quieter operation.
Fuel Line Hook-Up: Two Line System
Use a two line system only if the vertical lift
exceeds 8 feet.
1. Install the oil feed line as outlined in steps
1-6 below.
2. Install the oil pump bypass plug in the
bottom return port.
3. Run the return line up through the furnace
base to the return port of the pump. Run
the other end of the line to the tank, using
3/8" O.D. copper tubing or 1/4" pipe with
the ends capped, and routing the line so it
stays clean.
Figure 12. Recommended Tank Hook-Up
200 to 300 Gallon Tank
Drain
End of Oil Supply Line
3" to 5" Above
Bottom Drain
Guide pipe
Gauge
Vent with
Cap
2" Duplex
Bushing
2" Fill
3/8" Oil Supply Line
Note: Additional venting may
be required if tank is filled rapidly.
4. Insert the return line through the second
opening in the duplex bushing. If the
bottom of the tank is lower than the pump
intake, the tube should be inserted three or
four inches from the tank bottom. If the
bottom of the tank is higher than the pump
intake, the return line should extend not
more than 8" inside the tank.
Hook-Up Procedure (See Figure 12)
1. Use 3/8" O.D. copper tubing for the fuel
line. Cap the end with tape to keep out dirt
while the line is being routed.
2. Install duplex bushing for two 3/8" lines in
the top fitting of the tank.
3. Insert one end of the tubing through the
duplex bushing until it is three to five inches
from the bottom drain. Tighten the bush-
ing.
4. Run the line where it will not be subject to
damage. Also make bends gradually and
avoid kinks which might restrict oil flow.
5. Open the burner access door. Connect
the oil line to the intake port on the pump.
Tighten other port plugs on the pump.
6. Be sure the oil line is airtight! Air leaks can
cause the pump to lose prime and will
create other problems such as nozzle
failure, odors, rumbling noise, and false
safety shut down.
7. Insert the short length of the copper tube
level with the bottom of the duplex bushing.
Tighten the bushing. Form the tube into an
inverted “U” to serve as a vent.
How to Eliminate Air Leaks
To eliminate problems caused by air in the oil
line, all connections in the oil supply line and all
plugs, nuts, and fittings on the pump must be
airtight. This includes the nut that covers the
pressure adjustment. It is important that the
hook-up be done carefully and with a good
flaring tool.
Fuel Oil Type
Do not use fuel oil heavier than Grade No. 2.
Grade No. 1 may be used where the oil supply
is subject to low temperatures.
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