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Maintenance and service
April 2023
2. If it is damaged, use the following procedure to remove the thermocouple adaptor
3. If removing the pre-heater (B), clamp the flats of the sensor holder (E) in vise jaws
4. Unthread and remove the pre-heater.
5. Use a cleaning solvent to thoroughly clean the stainless steel balls (C) and pre-
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.
Procedure
1. If the you removed the pre-heater (B,
242
(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.
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.
heater chamber in the sensor holder (E).
Refer to the applicable MSDS for solvent handling precautions.
(Loctite #567) to the external pipe threads of the pre-heater (B) and plug (D).
Do not apply sealant to the first turn of the pipe threads.
Figure
10-24), apply pipe thread sealant
Emerson.com/Rosemount
Manual
00809-0500-4881
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