Wire Burner; Burner Packaged With Appliance; Burner Installed At Jobsite; Special Wiring Required For Burners With Covers - Beckett AF Series Manual

Oil Supply Pressure
Control Required
Damage to the filter or pump seals could cause oil
leakage and a fire hazard.
y The oil supply inlet pressure to the burner cannot
exceed 3 psig.
y Insure that a pressure limiting device is installed in
accordance with the latest edition of NFPA 31.
y Do NOT install valves in the return line. (NFPA 31,
Chapter 8.)
y Gravity Feed Systems: Always install an anti-siphon
valve in the oil supply line or a solenoid valve (RWB
Part # 2182602U) in the pump/nozzle discharge
tubing to provide backup oil flow cut-off protection.
The burner may be equipped with a single-stage fuel
unit for these installations. Connect the fuel supply to the
burner with a single supply line if you want a one-pipe
system (making sure the bypass plug is NOT installed in
the fuel unit.) Manual bleeding of the fuel unit is required
on initial start-up. If connecting a two-pipe fuel supply,
install the fuel unit bypass plug.
Fuel supply below the level of the 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
horizontal and vertical length, the installation may
also require a two-stage pump. Consult the fuel unit
manufacturer's literature, included with the burner, for lift
and vacuum capability.
Fuel line installation
○ Continuous lengths of heavy wall copper tubing are
recommended. Always use flare fittings. Never
use compression fittings.
○ Always install fittings in accessible locations.
Proper routing of fuel lines is required to prevent air
cavitation and vibration.
AFG Burner Manual

Wire burner

Burner packaged with appliance

○ Refer to appliance manufacturer's wiring diagram for
electrical connections.
Electrical Shock Hazard
Electrical shock can cause severe
personal injury or death.
y Disconnect electrical power before installing or
servicing the burner.
y Provide ground wiring to the burner, metal control
enclosures and accessories. (This may also be
required to aid proper control system operation.)
y Perform all wiring in compliance with the National
Electrical Code ANSI/NFPA 70 (Canada CSA C22.1)

Burner installed at jobsite

○ Refer to Figures 18 & 19, Page 14, for typical
burner wiring, showing cad cell primary controls.
Burner wiring may vary, depending on primary
control actually used.
○ Refer to the appliance manufacturer's wiring
diagram prior to connecting the burner wiring. All
wiring must be in accordance with the latest revision
of National Electric Code NFPA 70 and all local
codes and regulations. In Canada, all wiring is to be
in accordance with the Canadian Electrical Code,
Part 1.
The 7505 primary control with valve-on delay (pre-
time) and burner motor-off delay (post-time) requires
a constant 120 volts AC power source supplied to the
BLACK wire on the control. The RED wire goes to the
appliance limit circuit. Please note that other control
manufacturers may use different wire colors for power
and limit connections.

Special wiring required for burners with covers

The mounting plate is not a conduit connection point.
Pass conduit and attached connector through the
opening in the mounting plate and attach it directly to the
burner-mounted 4x4 electrical box.
If attaching a burner cover to a previously installed
burner, attach the mounting plate and then slide the
conduit into the "J" shaped conduit slot.
Section: Wire Burner
13