Instruction Manual – Model CF2500/CF3500 Oil Burner

Sequence of operation — typical

1.On call for heat from the appliance operating controls (and the circuit from T to T of the R8184 closed), power is applied to the R8184 black wire (BK).

2.The R8184 applies 120 volts to the orange wire (OR), acti- vating the burner motor (M1) and the ignition transformer (TR). The oil pump is operated by the burner motor, so oil pressure is delivered to the oil valve inlets.

3.Power is applied to the oil valve circuit. If optional timer, (TM), is installed, oil flow will be delayed for the timer duration, thus providing a prepurge period. When the timer times out, oil valves S1 and S3 are activated, allowing oil to flow to the low-fire nozzle.

4.With the low-fire hold switch (LFHS) in the “IN” position, the burner will remain at low fire.

5.When the low-fire hold switch is moved to the “OUT” position, the damper motor (DM) will be activated. This will begin opening the air damper.

6.When the damper motor end switch is tripped, high-fire oil valve (S2) is activated, providing pressure at the high-fire oil nozzle. With both nozzles firing, the burner is now at

high fire. The damper motor end switch is set to operate before the damper has reached full open to assure a smooth transition to high fire.

7.If a high/low-fire control is installed at H/L, this control will cycle the firing rate automatically during an operat- ing cycle.

8.At the start of the cycle, the R8184 begins checking for flame signal between F and F. Flame must be established within 15 seconds of initiation. If no flame is sensed after 15 seconds, the R8184 will terminate all power to the blower and oil circuits, shutting the burner down. The con- trol will electrically lock out.

•To reset the control after lockout, wait 2 to 3 minutes after lockout to give the internal switch time to cool.

Then push the reset button on the primary control, al- lowing the burner to operate in normal sequence.

•Troubleshoot the reason for flame sense failure.

9.When the call for heat signal terminates (at the black wire of the R8184), the R8184 terminates power to all circuits, closing the oil valves and stopping the burner motor.

Prepare the burner for start-up

Start-up checklist – Verify the following before attempting to start burner.

❏Combustion air supply and venting have been inspected and verified to be free of obstructions and installed in accordance with all applicable codes.

❏Oil nozzles have been selected correctly and securely installed in the nozzle adapter.

❏Fuel unit by-pass plug is installed for two-pipe oil systems. (Do not install by-pass plug for one-pipe systems.)

❏Fuel connection to nozzle line assembly is secure.

❏Dimension Z has been set per this instruction manual. See

Set dimension Z on page 7.

❏Fuel supply line is correctly installed, the oil tank is sufficiently filled, and shutoff valves are open.

❏Burner is securely mounted in appliance, with pressure firing plate and gasket installed for pressurized chamber application.

❏Appliance has been filled with water (boilers) and controls have been operationally checked.

❏Burner has been installed in accordance with appliance manufacturer’s instructions (when available).

❏Also refer to appliance manufacturer’s instructions (when available) for start-up procedures.

Form 6104 BCF-35-R0699

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Beckett CF 2500/ 3500 instruction manual Sequence of operation typical, Prepare the burner for start-up
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CF 2500/ 3500 specifications

The Beckett CF 2500/3500 series represents a significant advancement in the oil burner technology, widely recognized for its high efficiency and reliability. These burners are designed for residential and light commercial applications, ensuring optimal heating performance with minimal environmental impact.

One of the standout features of the CF 2500 and 3500 models is their robust construction, which utilizes high-quality materials to enhance durability and longevity. This is particularly beneficial in demanding operational environments where the equipment may be subject to wear and tear. Both models are equipped with an advanced combustion head that promotes superior air-fuel mixing, leading to more efficient burning and lower emissions.

The combustion technology employed in these burners is centered around reliable ignition and stable flame management. The CF series features an innovative electronic control system that not only allows for precise control of the burner operation but also includes diagnostic capabilities. This ensures that maintenance can be performed efficiently, reducing downtime and service costs.

In terms of energy efficiency, the CF 2500/3500 models boast impressive ratings, making them ideal for homeowners looking to reduce energy bills while minimizing their carbon footprint. The burners can seamlessly integrate with various heating systems, providing flexibility in design and installation.

Another noteworthy characteristic is the user-friendly design, which simplifies the installation process. The compact size of the CF series allows it to fit into tight spaces while still delivering powerful performance. Moreover, the access panels for maintenance are strategically placed, enhancing technician efficiency during service calls.

Safety features are paramount in the Beckett CF series, which includes flame monitoring and flame failure response systems. These features ensure that the burner operates safely and effectively, thereby minimizing the risk of operational incidents.

In conclusion, the Beckett CF 2500 and 3500 oil burners are a blend of efficiency, ease of use, and safety. Their advanced technologies and features set a new standard in the oil burner market, making them a top choice for those seeking reliable and eco-friendly heating solutions. These units not only meet the demands of today's heating requirements but also set a path towards a more sustainable future.
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