Emerson Rosemount OCX 8800 Reference Manual page 222

Maintenance and service
8.
9.
10.
Install OCX 8800
Complete the following steps to install the transmitter.
Observe the following caution when installing the transmitter in a hot process stack. If the
process is shut down and cooled, the transmitter can be installed in the stack prior to
connecting the pneumatics and wiring.
CAUTION!
EQUIPMENT DAMAGE
Before installing the OCX 8800 into a hot stack or ductwork, make sure that the OCX 8800 is
turned on and at normal operating temperature. Exposing a cold OCX transmitter to hot
process gases can cause permanent damage to the equipment.
CAUTION!
EQUIPMENT DAMAGE
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. Failure to connect
the pneumatic lines can allow the flow of contaminants into the transmitter ports.
Procedure
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10.
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Disconnect and remove customer power and signal wire conduits and wiring from
the electronics housing.
Remove insulation to access the sensor housing mounting bolts. Unbolt the
transmitter from the stack and take it to a clean work area.
Allow the unit to cool to a comfortable working temperature.
Bolt the transmitter to the stack and install insulation. Refer to
sure all test gas lines and electrical connections are complete.
Connect the test gas lines and instrument air lines to the electronics housing.
Remove the electronics housing cover.
Install customer power and signal conduits and wiring at the electronics housing.
If used, connect external relay leads to the alarm output relay terminal block,
Figure 9-2.
Connect the O and COe signal leads to the 4-20 mA signal output terminal block.
2
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.
Connect the ground lead to the ground stud. Secure the connection with two nuts.
Attach a separate ground lead (G wire) from the ground stud to the G terminal on
the power input terminal block.
Install the cover on the electronics housing.
Restore power to the system. Allow the transmitter to reach normal operating
temperature.
Figure 9-1 and make
OCX 8800