6. Disconnect and remove the O
2
and COe signal leads from the 4-20 mA
signal output terminal block.
7. If used, disconnect and remove the external relay leads from the alarm
output relay terminal block.
8. Disconnect and remove customer power and signal wire conduits and
wiring from the electronics housing.
9. Remove insulation to access the sensor housing mounting bolts. Unbolt the
transmitter from the stack and take it to a clean work area.
10. Allow the transmitter to cool to a comfortable working temperature.
Install transmitter
Observe the following cautions when installing the transmitter in a hot process
stack. If you shut down and cool the transmitter, you can install it in the stack
prior to connecting the pneumatics and wiring.
CAUTION
Equipment damage
Exposing a cold transmitter to hot process gases can cause permanent damage to
the equipment.
Before installing the transmitter into a hot stack or ductwork, make sure it is
turned on and at a normal operating temperature.
CAUTION
Equipment damage
Failure to connect the pneumatic lines can allow the flow of contaminants into the
transmitter ports.
Whenever a positive stack pressure exists at the installation site, be sure to
connect all pneumatic lines prior to installing the transmitter in the stack or
ductwork.
Procedure
1. Connect the test gas lines and instrument air lines to the electronics
housing.
2. Remove the electronics housing cover.
3. Install customer power and signal conduits and wiring at the electronics
housing.
4. If used, connect external relay leads to the alarm output relay terminal
block, Figure 10-2.
5. Connect the O
2
and COe signal leads to the 4-20 mA signal output terminal
block.
6. Connect the line (L1 wire) to the L1 terminal and the neutral (N wire) to the
N terminal on the AC power input terminal block.
Maintenance and service Manual
December 2022 00809-0500-4880
240 Emerson.com/Rosemount
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