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Instruction Manual
IM-106-880C, OI
September 2009
9-13
Hazardous Area OCX 8800
Remove COe Sensor Assembly
1. Disconnect COe heater, thermocouple, and sensor wires from terminal
blocks. Refer to Figure 9-9.
2. Remove insulator (1, Figure 9-10).
NOTE
For easier access, you may remove two screws from base of terminal block
mounting (13) and move terminal block assembly out of the way.
3. Remove tubes (2, 3, and 4) from COe sensor assembly (5), eductor
fittings (12 and 15), and sensor housing (7).
4. Unfasten bayonet connector of COe thermocouple (8) and remove
thermocouple.
5. Loosen clamp screw of COe band heater (9) until heater rotates freely
on sensor holder (11).
Figure 9-9. COe Sensor,
Thermocouple, and Heater
Connections
O2
RED
T/C O2
T/C CO
T/C SB
EXC
CJC
COe Sensor Wires
COe Heater Wires
COe Sensor
Assembly
CO REF
CO ACT
Sensor HousingTerminals
+
-
HTR 02
HTR SB
2
2
1
+
-
+
-
+
-
+
-
+
-
+
YEL
-
+
37390018
HTR 02
2
1
HTR CO
1
WHT
BLU
RED
RED
WHT
COeThermocouple Wires
-
EXC
RED
BLU
CJC Sensor
NOTE: All wires
at these terminals
are in the CJC
current loop.