Wire the Burner, Sequence of Operation | Beckett CG15, CG50, CG25

Section: Wire the Burner & Sequence of Operation

Wire the Burner

Install the burner and all wiring in accordance with the National Electric Code ANSI/NFPA 70 (Canada CSA C22.1) and all applicable codes and requirements. Wire the burner in compliance with all instructions and diagrams provided by the appliance manufacturer. Verify operation of all controls in accordance with the appliance manufacturer’s guidelines.

Do Not Bypass Safety

Controls

Tampering with, or bypassing safety controls could lead to equipment malfunction and result in asphyxiation, explosion or ﬁre.

ySafety controls are designed and installed to provide protection.

yDo NOT tamper with or bypass any safety control.

yIf a safety control is not functioning properly, shut off all main electrical power and gas supply to the burner and call a qualiﬁed service agency immediately.

See Figures 9A & 9B for typical wiring diagrams, with the ﬂame

safeguard control, for reference purposes only. Check the literature that was packaged with the burner for the primary control manufacturer’s instructions and the exact wiring diagram for your speciﬁc burner.

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.)

yPerform all wiring in compliance with the National Electrical Code ANSI/NFPA 70 (Canada CSA C22.1)

Keep Service Access

Covers Securely Installed

These covers must be securely in place to prevent electrical shock, damage from external elements, and protect against injury from moving parts.

yAll covers or service access plates must be in place at all times except during maintenance and service.

yThis applies to all controls, panels, enclosures, switches, and guards or any component with a cover as part of its design.

Incorrect Wiring Will

Result in Improper Control

Operation

Fire or Explosion Hazard

Can cause severe injury, death, or property damage.

yThe control can malfunction if it gets wet, leading to accumulation of explosive vapors.

yNever install where water can ﬂood, drip or condense on the control.

yNever use a control that has been wet - replace it.

Sequence of Operation

RM7897C & RM7840L Flame Safeguard Controls

1.Initiate – The primary control enters the INITIATE sequence when the control is ﬁrst powered on or power returns after an interruption. The initiate sequence is a ten second delay during which the control veriﬁes line voltage stability.

2.Standby – The control enters STANDBY until the limits, operating limit control, burner switch, and all microcomputer-monitored circuits are in the correct state.

3.Load Demand – Operating limit control contacts close on drop in temperature (or pressure) and initiates the start sequence.

4.Prepurge – The control will signal the PREPURGE sequence when the airﬂow interlock and all switches are in the correct state. The Prepurge sequence is the amount of time the blower motor runs prior to the ignition start sequence. Timing for the Prepurge sequence is determined by a card mounted inside the control module (typically 30 seconds). For the RM7897A control, Prepurge is conducted with the air damper in the low ﬁre position. For the RM7840 control the air damper opens to the high ﬁre position for the timed prepurge period and returns to the low ﬁre position before releasing the control for ignition.

5.Trial for Ignition (TFI) – After the Prepurge sequence has timed out, the ignition and main gas valves will be energized. Because the burner has direct spark ignition for the main ﬂame, the ﬂame must be established and detected by the control within 4 seconds or lockout will occur.

6.Flame Stabilization – The burner will operate in low ﬁre for 10 seconds before initiating high ﬁre.

7.Run – With a ﬂame established and the control

CG25, CG50, CG15 specifications

Beckett CG25, CG15, and CG50 are advanced burner systems designed for optimal performance in residential and commercial heating applications. Developed with state-of-the-art technology, each model offers distinct features and characteristics tailored to meet varying demands.

The Beckett CG25 is engineered for medium-output applications, providing reliable heating with exceptional efficiency. One of its standout features is the high-performance combustion head which enhances the air-fuel mixing process, leading to improved burn quality and reduced emissions. Additionally, the CG25 incorporates a fully automatic control system that allows for precise temperature regulation, contributing to energy savings and lower operational costs.

The Beckett CG15, meanwhile, is ideal for smaller residential systems. It stands out for its compact design, making it easy to install in tight spaces. Despite its size, the CG15 does not compromise on performance. It features advanced flame retention technology, which ensures a stable and efficient burn, while its low noise operation adds convenience for users. The CG15 also benefits from a robust safety system that includes a lockout feature to prevent unsafe operation.

On the higher end, the Beckett CG50 is designed for larger heating applications and is capable of generating high outputs while maintaining fuel efficiency. Its innovative design encompasses a three-stage combustion process that enhances efficiency and minimizes emissions significantly. The CG50 also features advanced diagnostic capabilities, providing real-time feedback and enabling proactive maintenance, which increases reliability and prolongs equipment life.

All three models are built with durability in mind, utilizing high-quality materials to withstand harsh operating conditions. They are compatible with various types of fuel, including oil and gas, making them versatile solutions for a broad range of heating needs. Beckett's commitment to sustainability is evident in the design of these burners, as they comply with stringent environmental regulations.

In conclusion, the Beckett CG25, CG15, and CG50 systems represent a blend of innovative technology, efficiency, and robust design. Their unique features cater to different heating demands, making them suitable for various applications while ensuring both performance and reliability. Whether for residential or commercial use, these burners are ideal choices for anyone looking to invest in a high-quality heating solution.

Beckett CG15, CG50, CG25 Wire the Burner, Sequence of Operation, Do Not Bypass Safety Controls

Models: CG25 CG50 CG15