Beckett RWF40 CG15 Manuel D’Utilisation

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.  

RM7897C & RM7840L Flame Safeguard Controls

Initiate – The primary control enters the INITIATE 
sequence when the control is fi rst powered on or 
power returns after an interruption. The initiate 
sequence is a ten second delay during which the 
control verifi es line voltage stability. 
Standby – The control enters STANDBY until the 
limits, operating limit control, burner switch, and all 
microcomputer-monitored circuits are in the correct 
state.
Load Demand – Operating limit control contacts 
close on drop in temperature (or pressure) and 
initiates the start sequence.
Prepurge – The control will signal the PREPURGE 
sequence when the airfl ow 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 fi re 
position. For the RM7840 control the air damper 
opens to the high fi re position for the timed 
prepurge period and returns to the low fi re position 
before releasing the control for ignition. 
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 fl ame, the fl ame 
must be established and detected by the control 
within 4 seconds or lockout will occur.  
Flame Stabilization – The burner will operate in 
low fi re for 10 seconds before initiating high fi re.
Run –  With a fl ame established  and the control 

Safety controls are designed and installed to provide 
protection.
Do NOT tamper with or bypass any safety control.
If a safety control is not functioning properly, shut off 
all main electrical power and gas supply to the burner 
and call a qualifi ed service agency immediately.

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

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 specifi c burner.  

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)

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All covers or service access plates must be in place 
at all times except during maintenance and service.
This applies to all controls, panels, enclosures, 
switches, and guards or any component with a cover 
as part of its design.

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The control can malfunction if it gets wet, leading to 
accumulation of explosive vapors.
Never install where water can fl ood, drip or 
condense on the control.
Never use a control that has been wet - replace it.

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