Beckett CG50 Start the Burner, Burner Start Procedure, Initial Air Settings, Test Instruments

Section: Start the Burner

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 efficiency.

○Electrical multi-meter capable of measuring voltage, ohms, amps, and DC micro-ammeter 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 0.01” W. C.

○Having several manometers or U tubes with the correct range can simplify the testing and set up procedures.

Start the Burner

Professional Installation

and Service Required

Incorrect installation and mishandling of start- up could lead to equipment malfunction and result in asphyxiation, explosion or fire.

yThis burner must be installed and prepared for start- up by a qualified service technician who is trained and experienced in commercial gas burner system installation and operation.

yDo not attempt to start the burner unless you are fully qualified.

yDo not continue with this procedure until all items in the ‘Prepare the Burner for Start-up’ section have been verified.

yCarefully follow the wiring diagrams, control instruction sheets, flame safeguard sequence of operation, test procedures and all appliance manufacturer’s directions that pertain to this installation.

yIf any of these items are not clear or are unavailable, call Beckett at 1-800-645-2876 for assistance.

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.)

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 for the input firing 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.

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.

4.In order to check the function of each component (i.e: flame safeguard sequence, airflow 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 flame safeguard control will lock out since the fuel supply has been closed off.

5.If component operation sequence and function is correct, reset the flame safeguard and initiate a new cycle. Monitor the start-up cycle and manually open the main leak test cock as soon as the flame 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 flame for a brief time, trip any of the switches in the limit string to shut the burner down. Monitor the flame 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.

Initial Air Settings

If your burner was built for a specific 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 specified application, the following steps outline the procedure for initially setting the damper (these settings may be different from settings specific to a particular OEM).

Refer to Figure 10A and 10B for this procedure.

1.Remove the cover screw (A) then the cover (B) and set aside.

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