Instruction Manual

760004-A February 2002

Model NGA 2000 HFID

a.Fuel In 2-Way Solenoid Valve

1.Disconnect wiring solenoid valve wir- ing connector, note location.

2.Inside the analyzer module, discon- nect the tube going to the connector on the “out” port of the solenoid valve.

3.On the rear of the analyzer module at the fuel in port:

a.Disconnect the fuel in tube.

b.Remove nuts and washers.

c.Remove solenoid valve from analyzer module

4.Remove the fittings from the solenoid valve and replace the Teflon pipe thread tape.

5.Verify that body of replacement sole- noid valve is oriented as shown in Figure 4-22. If not, rotate till wires are in-line with “out” port.

6.Install fittings into replacement sole- noid valve, re-install in analyzer mod- ule.

b.Burner Air In Filter

1.Leaving the bulkhead fitting secured to the rear panel, remove the tubes, nuts and ferrules from the fitting.

2.Insert a clean, rigid piece of tube or rod (smaller than .25 inch diameter)

into the bulkhead fitting to force out the filter disc.

3.Install the replacement filter in the same manner, through the rear of the bulkhead fitting.

4.Re-connect tubes.

c.Heated Bypass Sample Out and Heated Sample In Restrictors

1.On the outside of the rear panel, dis- connect tube and remove nut.

2.Insert a small spade screwdriver into the bulkhead and remove the restric- tor.

3.Install in reverse order.

d.Regulated Air In Check Valve

1.Disconnect tube at elbow.

2.Remove check valve from female connector.

3.Remove elbow from check valve.

4.Add Teflon pipe thread tape to check valve threads.

5.Install elbow onto check valve.

6.Install check valve into female con- nector, verifying orientation of elbow fitting as shown in Figure 4-22.

4-28 Maintenance and Service

Rosemount Analytical Inc. A Division of Emerson Process Management