Logix
®
Digital Positioners FCD LGENIM0110-0 05/16
flowserve.com
37
27
Positioner Maintenance
The kits listed in section 31.2 Spare Parts Kits can be
replaced by a technician trained in positioner function and
handling of static sensitive devices.
CAUTION:
Depressurize the positioner before
servicing.
CAUTION:
Use eye protection.
CAUTION:
When touching the circuit boards, observe
precautions for handling electrostatically sensitive devices.
27.1 Scheduled Maintenance
The supply gas filter(s) should be scheduled for regular
maintenance as required to maintain supply gas quality. If
contamination is found in the filter, the inside of the
positioner should be visually inspected for contamination.
If contamination is found in the positioner, the positioner
should be replaced.
27.2 Required Tools and Equipment
The Logix
®
digital positioner has modular
components that can be replaced using the tools shown in
Figure 32: Tools for Positioner Maintenance
The spool, block and manifold of the double acting relay
can be cleaned using acetone, a soft cotton cloth and
cotton swabs.
27.3 Torque Requirements for Screws
Table 19: Torque Specification for Screws
Inner Cover (3 Screws)
0.34 N-m (3 in-lb)
Main Board (1 Screw)
0.34 N-m (3 in-lb)
Pressure Board ( 4 Screws)
0.68 N-m (6 in-lb)
Double Acting Relay Block ( 2 Screws)
0.56 N-m (5 in-lb)
Double Acting Relay manifold (2 Screws) 0.56 N-m (5 in-lb)
User Interface terminal connections.
0.5
– 0.6 N-m (4-5 in-lb)
27.4 Replacing the Multi-Function Card
Removal
1
Make sure the valve is bypassed or in a safe
condition.
2
Disconnect the power to the positioner.
3
Remove the main cover.
4
Remove the plastic inner cover by removing the three
screws (See Figure 34).
5
Unplug the pressure sensor connector from the main
board (See Figure 37).
6
Remove main board screw and auxiliary board screw
(See Figure 35).
7
Gently lift the main board out of the housing.
8
Unplug the auxiliary card connector from the board
(See Figure 30).
9
Unplug the auxiliary card from the back of the main
board.
Installation
1
Plug the auxiliary card into the connector in the back
of the main board (See Figure 30).
2
Plug the auxiliary card connector into the back of the
auxiliary (See Figure 30)
3
Place the main board back into the housing. Make
sure Piezo Cable, Hall Sensor Cable, Feedback Pot
and Pressure Sensor cable are placed below the
lower mounting boss as shown in Figure 33.
4
Reinstall the main board screw and auxiliary card
screw.
5
Plug the pressure sensor connector into the main
board (See Figure 37).
6
Reinstall the plastic inner cover and reinstall the three
screws (See Figure 34).
CAUTION:
Ensure proper circuitry is used before
connecting cables to the auxiliary card. See section 20
ELECTRICAL CONNECTIONS for more information.
7
Reinstall the main cover.
Figure 33: Cable Placement
Philips Screwdriver #2
________
Philips Screwdriver #1
________
Slot Screwdriver (
≤ 3.5mm) ________
2.5 mm Hex Key
________
2.0 mm Hex Key
________
Lower
Mounting
Boss
