Beckett 100 Manuel D’Utilisation

 

Instruction Manual – 

Model AFII Oil Burner 

Adjust, pipe, & wire burner 

 (continued) 

 

      The oil supply inlet pressure to the fuel unit cannot exceed 3 

psi. Install a pressure-limiting device in accordance with NFPA 31. 

•  Bolt the burner to the appliance using the factory-mounted flange or an 

adjustable flange. 

When the fuel supply is 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. 

•  When using the Beckett universal adjustable flange, mount the air tube at 

a 2° downward pitch unless otherwise specified by the appliance 
manufacturer. 

•  Verify that the air tube installed on the burner provides the correct 

insertion depth. See Figure 5. 

•  Continuous lengths of heavy wall copper tubing are recommended. 

•  The end of the air tube should normally be ¼" back from the inside wall of 

the combustion chamber. Never allow the leading edge of the head 
assembly to extend into the chamber, unless otherwise specified by the 
heating appliance manufacturer. Carefully measure the insertion depth 
when using an adjustable flange. Verify the insertion depth when using a 
welded flange. 

•  Always install fittings in accessible locations. Fuel lines should not run 

against the appliance or the ceiling joists (to avoid vibration noise). 

 

                  Never use Teflon tape on any fuel fitting. Tape fragments can 

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

 

Figure 5 – Mounting burner in appliance 

 

• 

Install two high quality shutoff valves in accessible locations on the oil 
supply line. Locate one close to the tank and the other close to the burner, 
upstream of the filter.

 

 
 

 

                 Some  states  require  these  valves  to  be  fusible-handle  design 

for protection in the event of fire. We recommend this as good industry 
practice for all installations. 

 
 

•  Install a generous capacity filter inside the building between the fuel tank 

shutoff valve and the burner, locating both the filter and the valve close to 
the burner for ease of servicing. Filter should be rated for 50 microns or 
less. 

 
 
 
 

 

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

•  Refer to Figures 6 and 7, page 9, for typical burner wiring, showing cad 

cell primary controls. Burner wiring may vary, depending on primary 
control actually used. The oil valve shown in Figures 6 and 7 may be an 
optional feature. 

    

BY-PASS

USE ONLY WITH

VALVE ON DELAY

INLET

A2EA-6520

NO. 2 FUEL

Made by Suntec

NO. 2 & LIGHTER FUEL

3 GPH  150-200 PSI  3450 RPM

4 GPH  100-150 PSI  3450 RPM

Exclusively for Beckett

INLET

 

SK8273

 

 

   All wiring must be in accordance with the latest revision of 

National Electric Code NFPA 70 and local codes and regulations. 

Carefully follow the fuel unit manufacturer’s literature and the latest edition of 
NFPA 31 for oil supply system specifications. If this information is unavailable, 
use the following basic guidelines.. 

 

  The wiring diagrams in this manual are for general reference 

only, and apply only to burners equipped with R8184G or R7184 primary 
controls. For other controls, refer to the control manufacturer’s literature or the 
diagrams supplied with the appliance. Failure to apply correct wiring could 
result in severe personal injury, death or substantial property damage.

 

      Fuel units with automatic bypass do not require a bypass plug. 

     The burner fuel unit is shipped without the bypass plug installed. 

You must install this plug on two-pipe oil systems. DO NOT install the plug in 
the fuel unit if connected to a one-pipe oil system. Failure to comply could 
cause fuel unit seal failure, oil leakage and potential fire and injury hazard. 

      The R7184 primary control with valve-on delay (prepurge) and 

burner motor-off delay (postpurge), shown in Figure 7, page 9, requires a 
constant 120 VAC 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. 

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 venting of the fuel unit is required on initial start-up. If 
connecting a two-pipe fuel supply, install the fuel unit bypass plug.