Anderson ANM77 Manuale operativo - Pagina 9

Sfoglia online o scarica il pdf Manuale operativo per Bruciatore Anderson ANM77. Anderson ANM77 14.

maximum position of the profile plate. In actual operation, the differential pressure

switch is usually set to detect the process air pressure difference before and after the

burner profile plate.

3. Start the combustion air fan, adjust it to 100% of the flow rate, measure the pressure

difference between the combustion air and the downstream of the burner, the design

DP is 2-2.5 mbar.

4. Modulate through full range of burner input capacity, check the air DP and combustion

air flow.

5. For dry run test, first close the manual valve closest to the burner, then start the control

program, and start the dry test of the burner. Doing such a dry test can check all the

interlocking conditions in the combustion system, such as gas pressure switches, air

pressure switches, and leak test system.

6. Then carry out the pilot burner commissioning; procedure is carried out until reliable

ignition is achieved and the flame signal of the pilot ignition can feed back to the flame

controller with stable flame signal. During ignition test, the gas valve before burner

should be closed.

7. After the stable ignition is established, open the gas valve before burner.

8. First, setup low fire. At this time, the control system should be set in the manual mode,

which is set by adjusting to the minimum firing position. The gas volume at this position

requires the flame to propagate across sectional area of the burner, that is, all modules

will be firing. The flame detector detects the far end of the burner. Since the flame

propagate to the far end of burner will take time, the time setting of the flame relay

can be adjusted at this moment, to make sure both flame detectors will be active to

monitor flame after the delay time is over.

9. The relevant pressure and gas flow values need to be recorded during the

commissioning process.

10. Then set the high fire rate. This is achieved by using the manual control of the process

controller driving the modulating gas valve open step by step. Each step of the ramp up

to the maximum rate being monitored, gas flows recorded as not to exceed the

required rate. On reaching the fully open position, the main gas pressure regulator can

be set to give the required heat capacity.

11. After the high fire is set, low fire position should be checked again for fire rate and

reliable ignition. This can be cycled couple times to ensure low fire-high fire-low fire-

high fire firing stable.

12. All pressure switches shall also be tested by reducing or increasing the setpoints until

system trip. Relevant alarm procedures and control logic checked. Trip positions

recorded and normal operation setpoints selected and set.

Note: The above procedure will be carried out by using the process air flow.

12.1

Start burner

After all firing rate is setup, the burner gets into operation mode, the gas flow control

valve is controlled by 4-20 mA from temperature controller. The pilot burner could be

closed or run continuously according to the design requirements.

Anderson Thermal Soluions（Suzhou）Co. Ltd.

Anderson Thermal Solutions – ANM77 Burner Operation Manual