Instruction manual

Table Of Contents
NGA 2000 HFID
Instruction Manual
HAS64E-IM-HW
September 2008
4 - 12 Maintenance and Service Emerson Process Management GmbH & Co.OHG
4-6 THERMAL BLOCK
The sample RTD can be replaced with the thermal block
attached to burner and mounted in oven. The cartridge
heater and thermostat are also replaceable with ther-
mal block secured to burner, but must be removed from
the oven.
a. Sample RTD
1. Refer to Figure 4-4A. Remove the four screws
securing the oven cover, remove cover.
2. Disconnect the sample RTD wiring connector, note
location.
3. Refer to Figure 4-9. Remove the two screws se-
curing the sample RTD, pull sample RTD out.
4. Install replacement sample RTD, secure with
screws.
5. Attach sample RTD wiring connector.
6. Re-attach oven cover.
b. Cartridge Heater
1. Remove oven from analyzer module per Section
4-3a.
2. Remove burner / thermal block from oven per
Section 4-3b.
3. Refer to Figure 4-9. Loosen retaining set screw,
pull out cartridge heater.
4. Install replacement cartridge heater, snug down
set screw.
5. Install burner / thermal block into oven.
6. Install oven into analyzer module.
Figure 4-9: Thermal Block- Sample RTD, Cartridge Heater and Thermostat
Sample RTD
657061
Thermostat
659068
Cartridge Heater
659643