Beckett ADC manual Burner Wiring, C. Fuel Supply Below Level of Burner, Do Not Use Teflon Tape

Section: Fuel Supply

The Beckett Z gauge (part number Z- 2000) is available to permit checking

the F head “Z” dimension without removing the burner.

Fuel Supply

C. Fuel Supply Below Level of Burner

When the fuel supply is more than eight feet below the level of the burner, a two-pipe fuel supply system is required. Depending on the fuel line diameter and the horizontal and vertical length, the installation may also require a two-stage pump. Consult the fuel unit manufacturer’s literature for lift and vacuum capability.

A. Connect Fuel Lines

Do Not Install Bypass Plug with 1-Pipe System

Failure to comply could cause Immediate pump seal failure, pressurized oil leakage and the potential for a fire and injury hazard.

yThe burner is shipped without the bypass plug installed.

yInstall the bypass plug in two-pipe oil supply systems ONLY.

D. Fuel Line Replacement (Remote Tank Only)

When replacing fuel lines, continuous lengths of heavy wall copper tubing is recommended. To ensure a tight seal, always use flare fittings. Never use compression fittings. Always install fittings in an accessible location. To avoid vibration noise, fuel lines should not run against the appliance or the ceiling joists.

E. Fuel Line Valve and Filter

For oil supply system specifications for tanks not mounted on machines, carefully follow the pump manufacturer’s literature and the latest edition of the National Fire Protection Association (NFPA) 31 standard.

Pumps with automatic bypass do not require a bypass plug. Verify by

referring to the pump manufacturer’s instructions.

Do Not Use Teflon Tape

Damage to the pump could cause impaired burner operation, oil leakage and appliance soot-up.

yNever use Teflon tape on fuel oil fittings.

yTape fragments can lodge in fuel line components and fuel unit, damaging the equipment and preventing proper operation.

yUse oil-resistant pipe sealant compounds.

B. Fuel Supply Level with or Above Burner

The burner may be equipped with a single stage pump. If a one-pipe system is installed, verify a bypass plug is not installed in the pump, then connect the fuel supply to the burner with a single supply line Note that manual bleeding of the pump is required on initial start-up or when the equipment runs out of fuel. When connecting a two- pipe fuel system, install the pump bypass plug.

Shutoff valves should be located in the oil supply line. Do not install valves in the return line.

Burner Wiring

A. Burner installed on equipment

Refer to appliance manufacturer’s wiring diagram for electrical connections.

Oil Supply Pressure

Control Required

Damage to the filter or pump seals could cause oil leakage and a fire hazard.

yThe oil supply inlet pressure to the burner cannot exceed 3 psig.

yEnsure that a pressure limiting device is installed in accordance with the latest edition of NFPA 31.

yDo NOT install valves in the return line. (NFPA 31, Chapter 8.)

yGravity Feed Systems: Always install an anti-siphon valve in the oil supply line or a solenoid valve (RWB Part # 22246U) in the pump/nozzle discharge tubing to provide backup oil flow cut-off protection.

Electrical Shock Hazard

Electrical shock can cause severe personal injury or death.

yDisconnect electrical power before installing or servicing the burner.

yProvide ground wiring to the burner, metal control enclosures and accessories. (This may also be required to aid proper control system operation.)

B. Burner Replacement

Burner wiring may vary, depending on the actual primary control and furnished options. Refer to Figure 6 for typical burner wiring, showing cad cell primary controls. Note that the relay and control, shown in the wiring diagram are optional features.

12 Vdc ADC Burner Manual

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