Emerson Rosemount OCX8800A Manual page 266

Maintenance and service
December 2022
2. If it is damaged, use the following procedure to remove the thermocouple
3. If removing the pre-heater (B), clamp the flats of the sensor holder (E) in
4. Unthread and remove the pre-heater.
5. Use a cleaning solvent to thoroughly clean the stainless steel balls (C) and
10.3.2 Assemble sensor housing
Assemble COe sensor assembly
CAUTION
Equipment damage
Turning the pre-heater in the sensor holder with the stainless steel balls in place
will cause permanent damage to the pre-heater.
Always remove the stainless steel balls (approximately 200) from the sensor
holder before removing or installing the pre-heater.
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adaptor (G) from the sensor holder (E).
a) Use a propane torch to heat the thermocouple adapter to 450 °F (232
°C) minimum.
b) While heating, use a flat-head screwdriver to apply removal torque.
Apply torque until the pipe thread sealant softens. Remove and
discard the thermocouple adapator.
c) Use MEK or methylene chloride solvant to clean the thread sealant
residue from the internal pipe threads in the sensor holder.
Refer to the applicable material safety data sheet (MSDS) for solvent
handling precautions.
CAUTION
Equipment damage
Turning the pre-heater in the sensor holder with the stainless steel balls in
place will cause permanent damage to the pre-heater.
Always remove the stainless steel balls (approximately 200) from the sensor
holder before removing or installing the pre-heater.
vise jaws with plug (D) pointing up. Remove the plug. Unclamp the sensor
holder and pour the stainless steel balls (C) into a container.
Note
Only remove the pre-heater when it or the sensor holder is damaged. If
removal is not required, leave the pre-heater installed in the sensor holder.
pre-heater chamber in the sensor holder (E).
Refer to the applicable MSDS for solvent handling precautions.
Manual
00809-0500-4880
Emerson.com/Rosemount