Flowserve StarPac 3 - Manual (Page 30)

StarPac Intelligent Control System FCD VLENIM0066-05 04/14
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14.6 Thermocouple Replacement
In normal configuration, the thermocouple does not penetrate the valve body wall. Depres-
surizing the body is not necessary when replacing the thermocouple.
WARNING: If the StarPac II was ordered with a special thermocouple option,
verify the need to depressurize the body before proceeding.
1. Disconnect power and air supply to the unit.
2. Remove the main cover.
3. Remove the two keypad retaining screws. Carefully pull the keypad away from
the main PCB board. Unplug the keypad ribbon cable from the main PCB board
and remove the keypad.
4. Disconnect the red and yellow thermocouple wire. Refer to Figure 11.
5. Loosen the tubing nuts on both ends of the thermocouple assembly (refer to
Figure 12).
Figure 12: Thermocouple Replacement
6. Pull the wires out of the StarPac base and slip the tubing off the wires.
NOTE: On certain applications, the cables may be potted inside the fitting at the
bottom of the positioner housing. To remove the cable it will be necessary to
cut the existing cable on both sides of the fitting. The fitting will need to be re-
moved from the housing and a new replacement fitting will need to be installed.
After the new cable is installed it will be necessary to repot the cable inside the
new fitting.
7. Unscrew the old thermocouple from the body.
STOP!