Model NGA2000 HFID
Instruction Manual
b. | Ignition |
1. Verify that the fuel pressure/flow is | |
a. Safety System | correct. |
|
1.Verify purge supply pressure at bulkhead is between 10 and 20 psig.
2.Check case for leaks.
3.Check burner for leaks.
4.Verify purge pressure sensor tube connection.
5.Verify purge out port is vented to atmospheric pressure.
6.Verify Safety PCB connector J2 is attached.
7.Check for a +24V power glitch.
8.Verify that there is no large vibra- tion shock.
9.Check for external leak in purge line.
10.Verify case pressure is greater than 0.5” of water.
11.Check case for
12.Verify the purge flow/pressure switch harness is routed away from the solenoid valves.
13.Verify the purge timer is counting.
14.Verify purge timer jumper is cor- rectly installed.
15.Verify Internal purge pressure is greater than 5.5 psig.
16.Verify the purge gas switch has been activated.
2.Verify that the burner air pres- sure/flow is correct.
3.Verify that the ignitor is generating enough heat.
4.Verify the burner exhaust is vented to atmosphere.
5.Verify safety system has been acti- vated.
6.Verify the manual switch is operat- ing correctly.
7.Verify
8.Verify burner is properly sealed.
9.Verify quality of air supply is good.
10.Verify quality of fuel supply is good.
11.Check burner tip for damage.
12.Check air and fuel restrictor for cor- rect flow.
13.Check burner tip alignment.
14.Verify burner cone is tight.
15.Check burner air and fuel lines for leaks.
16.Verify oven temperature is greater than 85°C.
17.Verify the reference thermistor is 100K ohm ±15% at 25°C.
18.Verify that there is +10VDC to the reference thermistor.
Rosemount Analytical Inc. A Division of Emerson Process Management | Maintenance and Troubleshooting |