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CG10 Burner Manual
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).
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.
Run – With a fl ame established and the control
continuing to detect a fl ame, the burner will operate
in the RUN mode until the load demand is satisfi ed
or a limit opens.
Load Satisfi ed – The fuel valves are closed. After
a 15 second post purge, the burner switches to idle
until the next call for operation.
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Sequence of Operation
(Typical for RM7897A fl ame safeguard primary control)
Section: Sequence of Operation & Prepare the Burner for Start-up
This operation sequence is
typical and for reference only. The
primary control could vary, depending on the customer
specifi cation and code requirements. For the specifi c
operating sequence that applies to your installation,
consult the appliance manufacturer’s directions, wiring
instructions, and control manufacturer’s literature
supplied with your burner.
Prepare the Burner for
Start-up
Professional Installation
& Service Required
Incorrect installation and mishandling
of start-up could lead to equipment
malfunction and result in asphyxiation,
explosion or fi re.
This burner must be installed and prepared for start-
up by a qualifi ed service technician who is trained
and experienced in commercial gas burner system
installation and operation.
Do not attempt to start the burner unless you are
fully qualifi ed.
Carefully follow the wiring diagrams, control
instruction sheets, fl ame safeguard sequence
of operation, test procedures and all appliance
manufacturer’s directions that pertain to this
installation.
If any of these items are not clear or are unavailable,
call Beckett at 1-800-645-2876 for assistance.
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Delayed Ignition, Explosion
and Fire Hazards
This is a direct spark ignition burner and
by code requirements must have a primary
control with a 4-second fl ame establishment
period. Exceeding 4 seconds could result in
delayed ignition, explosions and fi re.
Always verify the primary control has a 4-second fl ame
establishment period by carefully following the control
manufacturers’ confi guration instructions.
Example: Honeywell RM Series requires clipping and
removing the JR1 resistor.