ABB Endura AZ40 Manuel - Page 12

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Referring to Fig. 8.4:

4. Use a small flat-bladed screwdriver to depress the spring

connectors at terminal numbers 17 and 19 and disconnect

CO heater block thermocouple T/C 1 wires from top

terminal block connectors A.

5. Pull thermocouple (T/C 1) wires up through (right) opening

B in flange block C.

6. Carefully slide CO heater block insulation D away from

flange block C.

CAUTION – Minor injuries

Appropriate PPE (gloves / goggles) must be worn

when performing this step. The heater block

insulation material is fragile and becomes brittle

after continuous operation. When sliding insulation

away from the manifold, handle with care.

7. Use a small flat-headed screwdriver to remove screw E

with attached thermocouple retaining washer F from CO

heater block G. Retain screw / washer assembly for

re-use.

8. Withdraw thermocouple (T/C1) H from CO heater block

G and discard thermocouple.

9. Slide the new thermocouple (T/C1) into its chamber in CO

heater block G.

10. Apply a small amount of anti-seize compound (suitable for

temperatures up to 200 °C [392 °F]) to the thread of screw

E and use a small flat-headed screwdriver to secure

screw E with attached thermocouple retaining washer

F to CO heater block G.

INS/ANAINST/008-EN Rev. B | Endura AZ40 | Sensor assembly | Heater and thermocouple kit

11. Feed thermocouple (T/C1) wires down through right

opening B in flange block C and make terminal block

connections at the top connectors A as follows:

— connect one wire from thermocouple H (T/C1)

to terminal 18.

— connect one wire from thermocouple H (T/C1)

to terminal 19.

sensor in the reverse order of removal – refer

12. Refit the O

to steps 1 to 3 page 11.

13. To replace flange block thermocouple (T/C 2), refer to

Section 8.4, page 14.

14. Refit sensor covers – refer to Section 7.2, page 8.