One-Line System; Two-Line System; Fuel Line Hook Up; Fuel Line Bleeding - Nordyne M1MB 056 Installation Instructions Manual

3/8" Oil Supply Line
Vent with cap
2" Duplex
Bushing
Gauge
Guide
Pipe
End of Oil Supply Line
3" to 5" Above Bottom Drain
NOTE: Additional venting may be
required if tank is filled rapidly.
Figure 27. Typical Oil Piping for Above Ground (Single-Line) Supply
• The inside of the tank must be clean before fi lling. All
water, rust, sediment, and debris must be fl ushed out.
• A fuel or tank gauge (Figure 27) is recommended for
easy checking of the fuel level. Check the gauge reading
with a dipstick.
• Locate the storage tank conveniently near the home.
If the fuel tank is installed above ground, the tank may
rest 3 to 4 inches off the ground. Fuel tanks may also
be buried if properly coated to resist corrosion. The
vertical dimension from the bottom of the fuel tank to
the fuel pump must not exceed 10 feet.
• Keep the tank fi lled, especially in the summer to reduce
the accumulation of condensation.

One-Line System

The One-Line System is highly recommended where
vertical lift, from bottom of tank to pump, is less than 8
feet (Figure 27). A single line hookup has the advantage
of lower cost and quieter operation.

Two-Line System

If a Two-Line system is used or if oil is taken from the
bottom of the tank, a fi lter is recommended. A Two-Line
system should only be used if 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. Route the return line up through the furnace base to
the return port of the pump. Route the other end of the
line to the tank, using 3/8" O.D. copper tubing or 1/4"
pipe with the ends capped.
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.
18
Top of Tank
2" Fill
Shut-off
Valve
8 ft.
Drain
Optional
Alternate
Fuel
Fuel Line
Filter
Entry
Bypass Solenoid Valve
Nozzle Port
3/16 Flare Fitting
Oil
Flue Gas
Furnace
Sampling
Hole
Inlet Port
1/4 NPTF
On-Off-Fan
Switch
Control
Panel
Oil-Gun
Burner
Floor
Floor Cavity
Fuel line Hook-Up
1. Use a 3/8" O.D. copper tubing for the fuel line.
NOTE: 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 fi tting
of the tank. See Figure 27.
3. Insert one end of the tubing through the duplex bushing
until it is three to fi ve inches from the bottom drain.
Tighten the bushing.
4. Route the line where it will not incur any damage. Make
bends gradual and avoid kinks which might restrict oil
fl ow.
5. Open the furnace door and connect the oil line to the
intake port on the pump. Tighten other port plugs on
the pump. NOTE: Verify 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 shutdown.
6. Insert the short length of the copper tube level with the
bottom of the duplex bushing. Form the tube into an
inverted "U" to serve as a vent.

Fuel Line Bleeding

To eliminate problems caused by air in the oil line, all
connections in the oil supply line and all plugs, nuts,
and fi ttings on the pump must be airtight. NOTE: This
includes the nut that covers the pressure adjustment. It
is important that the hook-up be done carefully and with
a good fl aring tool.
Prepare the burner for priming by attaching a clear plastic
hose over the bleed port fi tting and fully opening the pump
bleed port. Use a suitable container to collect purged oil.
To ensure continuous operation, use a wire to jump
terminals T-T (or F-F) on the primary control while burner
is running.
Cordset
Pressure Adjustment
Screw
Beckett
Inlet Port
INLET
1/4 NPTF
USE ONLY WITH
VALVE ON DELAY
A2EA-6520
4 GPH 100-150 PSI 3450 RPM
NO. 2 & LIGHTER FUEL
3 GPH 150-200 PSI 3450 RPM
NO. 2 FUEL
INLET BY-PASS
Made by Suntec
Exclusively for Beckett
Bleed & Gauge Port
Return Port - Install 1/6" Bypass Pipe
Plug for 2-pipe System Only.
(Use 5/32" Allen Wrench)
If fuel pump fails to lift oil, check for air
leaks and tighten all fuel fittings. Re-
prime fuel pump by injecting fuel oil into
optional (top) return port. Replace return
port plug and repeat priming procedure.