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

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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

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Contents Fire, Explosion and Asphyxiation Hazards Page Contents Owner’s Responsibility General InformationHazard Definitions Frozen Plumbing Water Damage HazardPre-installation Checklist Burner Specifications Burner Label LocationElectrical Supply Verify Burner Air Tube AssemblyTest For Gas Pipe Leaks Verify Burner ComponentsMaximum Capacity at 3% O2 vs Furnace Pressure CG15, 60Hz Burner Dimensions Protect the Air Tube from Overheating Mount the BurnerConnect Gas Piping Do Not Use Teflon Tape on Gas PipingInstall a Drip Leg in Gas Supply Piping Gas Trains Gas Leaks and Explosion HazardsNatural Gas Supply Piping Capacity Propane LP Gas Supply Piping CapacityUL Gas Train High/Low and Low Fire Start Pipe SizeKeep Service Access Covers Securely Installed Wire the BurnerDo Not Bypass Safety Controls Sequence of OperationSection Sequence of Operation Section Sequence of Operation Prepare the Burner for Start-up Professional Installation Service RequiredDelayed Ignition, Explosion Fire Hazards Start the Burner Burner Start ProcedureInitial Air Settings Test InstrumentsDamper Motor with Cover Optional Modulation Linkage Adjustment Instructions Adjustment ProcedureInitial Burner Settings for Both Propane & Natural Gas CG50Modulation Control Display MeaningVerify Input Firing Rate Clocking a Gas Meter Temperature CorrectionEstimating Rate Uncorrected Flow Rate800 CG15.2S CG15.1S 600 400 200 CG15.4SCG15.3S 500Technician Required Check Operation and Safety ControlsTesting by Qualified Recommended Combustion Test Sequence Use Test Instruments to Set CombustionAnnual Maintenance Maintenance and ServiceAnnual Professional Service Required Turn Off Electric and Gas Supply Before ServicingAdjust the Burner for Proper Combustion Flame SafeguardInstallation Area Gas Supply PipingGas Gun Assembly Installation Propane Restrictor DescriptionNumbers As shown in Figures 16Test/Inspection Frequency Comments For the Operator Inspect Heating System RegularlyPeriodic Inspection Sheet Replacement Parts Item Description CG15 Part No CG25 Part No CG50 Part No See TableLimited Warranty Information
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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.
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