Beckett CG50 - Manual (Page 18)

18
Start the Burner
Initial Air Settings
If your burner was built for a specifi c OEM (Original
Equipment Manufacturer) application, the “Mfr’s Settings”
label (see Figure 1) will indicate the application and the
initial air settings made at Beckett. Please verify those
settings using the following procedure.
If your burner was not built for a specifi ed application, the
following steps outline the procedure for initially setting
the damper (these settings may be different from settings
specifi c to a particular OEM).
Refer to Figure 10A and 10B for this procedure.
Remove the cover screw (A) then the cover (B) and
set aside. 1.
For propane-fi ring burners, insure that the propane
restrictor has been correctly selected for your burner
model (see Table 4) and properly installed (see
Propane Restrictor Installation instructions).
Before operating insure that all protective cover
plates, enclosures and guards are in place and
securely fastened.
When available, refer to the appliance manufacturer’s
instructions and install the burner accordingly.
6. 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
effi ciency.
Electrical multi-meter capable of measuring voltage,
ohms, amps, and DC micro-ammeter for measuring
the fl ame signal. These could be included in one
meter or separate meters, but should be calibrated
and accurate.
Calibrated manometers and gauges capable of
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Burner Start Procedure
(Before proceeding, turn off and lock out electrical
power and close the main leak test cock to shut off
gas to the burner.)
With the power and main gas supply to the burner
turned off, make sure gas has not accumulated in
the boiler or fl ues.
Check the initial air settings for the input fi ring rate.
Check the manufacturer’s settings either on the
nameplate shown in Figure 1 or listed in Table 3. If
adjustment is necessary refer to Figures 10A & 10B
and set the damper motor cam so that the indicator
points to the values shown on the nameplate or listed
in Table 3.
With the main gas supply valve closed. Set the limit
or controller to call for heat then apply power to start
the burner. Reset the high and low gas pressure
switches if necessary.
In order to check the function of each component (i.e:
fl ame safeguard sequence, airfl ow proving switch,
ignition transformer, gas valves, safety lockout
timing, etc.), with the gas supply closed off, monitor
a complete burner run sequence. Note that the fl ame
safeguard control will lock out since the fuel supply
has been closed off.
If component operation sequence and function is
correct, reset the fl ame safeguard and initiate a new
cycle. Monitor the start-up cycle and manually open
the main leak test cock as soon as the fl ame safeguard
powers the safety shutoff valves. If the boiler room is
quiet you may be able to hear the valve open, if not
you can generally place your hand on the valve and
feel it open. After you have observed main fl ame for
a brief time, trip any of the switches in the limit string
to shut the burner down. Monitor the fl ame and safety
shutoff valves to assure that shutdown is controlled by
the valves and that they operate properly. With this
test passed you may safely initiate automatic start-ups
on subsequent cycles. 1.
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5.
Professional Installation
and 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.
Do not continue with this procedure until all items in
the ‘Prepare the Burner for Start-up’ section have
been verifi 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. y
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Section: Start the Burner