ABB Endura AZ40 Manual page 11

8.3 CO heater block thermocouple (T/C 1)
CAUTION – Minor injuries
The O sensor must be removed to enable access
2
to COe heater block thermocouple T/C 1 (steps 1 to 3).
Referring to Fig. 8.3:
1. Place the sensor assembly on a clean flat surface with the
flange studs pointing down.
2. Use a small flat-bladed screwdriver to depress the spring
connectors at terminal numbers 8, 9 and 10 and
disconnect CO heater block thermocouple T/C 1 wires
from top terminal block connectors A.
sensor A from manifold block B using a
3. Unscrew O
2
7
/ in. spanner (wrench) and withdraw the sensor.
8
CAUTION – Minor injuries
Do not overtighten when refitting the O
1 2 3 4
8
O2 HTR WHT+
Fig. 8.3 Removing the O sensor
2
sensor.
2
5 6 7 8 8 9 10 9 10 11 12 13 14 15 16 17 18 19 20
10
9
O2 SEN BLK
O2 HTR WHT–
Endura AZ40 | Sensor assembly | Heater and thermocouple kit | INS/ANAINST/008-EN Rev. B 11