Eclipse Vortometric v2.00 Guia de Instalação descarregar pdf (Página 18)

Eclipse AirHeat v2.00, Installation Guide No. 135, 7/99

Step 4: Set high fire gas

8. Adjust the outlet pressure from the main gas pressure

regulator to achieve the desired gas flow.

9. Once the chamber conditions stabilize, (i.e. pressure and

temperature), repeat Steps 3 through 8.

10. Remove the manometer.

11. Close the pressure taps.

1. Drive the main gas control valve to low fire.

2. Adjust the control valve linkage to provide the desired low

fire gas flow.

Step 5: Set low fire gas

1. If the burner is ignited, set the main gas pressure regulator

for 10” w.c. outlet pressure.

2. Drive the main gas control valve to high fire (full open).

3. Verify air flow with the burner firing, if necessary, repeat

Step 2 “Set air flow”.

4. Make sure that pressure taps B and C are open.

5. Connect the manometer to taps B and C.

6. Measure the gas differential pressure.

7. Use the fuel ∆ P curve from Data Sheet 135 for the gas

being used to find the differential gas pressure needed at

high fire.

Note:

It is very difficult to measure the very low gas pressures

experienced at low fire, and it may be necessary to rely on

visual inspection of the flame. This is especially true when

gas turndowns in excess of 20 to 1 are being used. The

main intent is to provide a stable flame with good flame

signal that will not cause the chamber temperature to

overshoot.

Step 6: Verify gas settings

Make sure that all settings are still the same after cycling the

system several times between high and low fire.

Caution:

Do not turn the combustion air blower off until the

chamber temperature is below 250ºF (121ºC). This will

prevent hot gases from back flowing into the burner and

blower causing damage to the burner.

1. Stop the burner through the burner control system.

2. Run the combustion air blower until the chamber

temperature drops below 250ºF (121ºC).

3. Shut off the combustion air blower.

4. Close all manual gas valves to the burner.

Step 7: Stop Procedure

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