Beckett SM - Manual (Page 11)

11 SF/SM Burner Manual
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 for lift and vacuum
capability.
Fuel line installation –
Wire Burner
Burner packaged with appliance
Continuous lengths of 0.035” nominal wall (0.032”
minimum) copper tubing are recommended. Always
use fl are fi ttings. Never use compression fi ttings.
Always install fi ttings in accessible locations.
Proper routing of fuel lines is required to prevent air
cavitation and vibration.
Fuel line valve and fi lter –
Install two high quality, oil duty rated, fusible-handle
design shutoff valves in accessible locations on the
oil supply line to comply with the NFPA 31 Standard
and authorities having jurisdiction. Locate one
close to the tank and the other close to the burner,
upstream of the fi lter for service access.
Install a generous capacity fi lter inside the building
between the fuel tank shutoff valve and the burner,
locating both the fi lter and the valve close to the
burner for ease of servicing. Filter should be rated
for 50 microns or less.
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Section: Wire Burner
Oil Supply Pressure
Control Required
Damage to the fi lter or pump seals could cause oil
leakage and a fi re hazard.
The oil supply inlet pressure to the burner cannot
exceed 3 psig.
Insure that a pressure limiting device is installed in
accordance with the latest edition of NFPA 31.
Do NOT install valves in the return line. (NFPA 31,
Chapter 8.)
Gravity Feed Systems: Always install an oil safety
valve (Webster OSV or Suntec PRV) in the oil supply
line or a solenoid valve (RWB Part # 2182602U) in
the pump/nozzle discharge tubing to provide backup
oil fl ow cut-off protection. y
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Refer to appliance manufacturer’s wiring diagram for
electrical connections.
Burner installed at jobsite
Refer to Figures 11a and 11b, 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.
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Electrical Shock Hazard
Electrical shock can cause severe personal
injury or death.
Disconnect electrical power before installing or
servicing the burner.
Provide ground wiring to the burner, metal control
enclosures and accessories. (This may also be
required to aid proper control system operation.)
Perform all wiring in compliance with the National
Electrical Code ANSI/NFPA 70 (Canada CSA C22.1) y
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