Beckett CG4 - Manual (Page 19)

19 CG4 Burner Manual
Section: PREPARE THE BURNER FOR START-UP
Prepare the Burner for
Start-up
Asphyxiation, Explosion/
Fire
Professional Installation & Service
Required. Incorrect installation and
mishandling of start-up could lead to
equipment malfunction.
This burner must be installed and prepared for start-
up by a qualified service technician who is trained and
experienced in gas burner system installation and
operation.
Do not attempt to start the burner unless you are fully
qualified.
Carefully follow the wiring diagrams, control instruction
sheets, control s equence of operation, test procedures
and all appliance manufacturer’s directions that pertain
to this installation.
Start-up Checklist
Verify the following before attempting to start the
burner:
1. Test Instruments
The following calibrated test equipment is required
to properly install the appliance. Whether these
are included in one kit or are individual test
components, they should be calibrated and in good
working order.
○ A combustion analyzer capable of measuring
oxygen (or carbon dioxide), carbon monoxide,
stack temperature, ambient temperature, and
appliance efficiency.
○ Electrical multi-meter capable of measuring
voltage, ohms, amps, and DC micro-amps for
measuring the flame signal. These could be
included in one meter or separate meters, but
should be calibrated and accurate.
○ Calibrated manometers and gauges capable of
measuring all pressure ranges in the gas supply
and appliance draft. This could typically range
from a few PSI to 0.1” W.C.
Start the Burner
Asphyxiation, Explosion/
Fire
Professional Installation & Service
Required. Incorrect installation an d set up
c ould lead to equipment malfunction.
This burner must be installed and prepared for start-
up by a qualified service technician who is trained
and experienced in gas burner system installation and
operation.
Do not attempt to start the burner unless you are fully
qualified.
Do not continue with this procedure until all items in
the ‘Prepare the Burner for Start-up’ section have been
verified.
Carefully follow the wiring diagrams, control instruction
sheets, control sequence of operation, test procedures
and all appliance manufacturer’s directions that pertain
to this installation.
Burner Start Procedure
(Before proceeding, turn off and lock out electrical
power and close the main shut off cock to shut off gas
to the burner.)
1. With the power and main gas supply to the burner
turned off, make sure gas has not accumulated in
the boiler or flues.
2. Check the initial air settings (shutter & band) for
input firing rate. If adjustment is necessary refer to
Figure 14 and loosen the adjustment screws then
twist the shutter and/or air band until the indicators
point to the values listed in Table 5 on Page 10.
3. With the main shutoff cock closed. Set the limit or
controller to call for heat then apply power to start
the burner.
4. In order to check the function of each component
(i.e.: 7590 sequence, airflow proving switch, ignition
transformer, gas valves, safety lockout timing,
etc.), with the main shutoff cock closed, monitor a
complete burner run sequence. Note that the 7590
control will lock out following the 3rd try for ignition
since the fuel supply has been closed off. Reset
the control by pressing the reset button while the
control is powered or by removing power from the
control for 10 seconds or more.
5. If 7590 operation sequence and function is correct,
turn off power and remove sensor wire from bottom
of 7590 control. Turn on power and fuel and initiate