ABB AV2123000 Positioner User Manual

REPAIR AND REPLACEMENT
Tools Required:
Flat-tip screwdriver.
1. Transfer the positioner from automatic to manual operation
(Section 5).
2. Remove the positioner cover by removing the two cover screws.
3. Carefully unhook the ends of the valve clip (Item 5). Remove the
valve clip from the valve body. Remove the valve stem (Item 3) from
the lower end of the valve body.
4. Remove the two pilot valve screws (Item 52) securing the valve
body and lift the valve body off the housing.
5. Replace the O-rings. Clean the O-ring grooves and apply Dow
Corning No. 4 or equivalent lubricant to the O-rings.
6. Set the (replacement or clean) valve body in place.
7. Secure the valve body by replacing and tightening the pilot valve
screws to 2.6, ±0.2 Nm (23, ±2 in.-lbs).
8. Make certain the valve stem is clean. Install the valve stem.
9. Install the valve clip.
10. Transfer the positioner back to automatic operation (Section 5).
11. Perform the procedure outlined in PILOT VALVE STROKE
ADJUSTMENT.
I/P Converter
Tools Required: • Flat-tip screwdriver.
• T15 Torx.
• Pliers.
NOTES:
1. Refer to Section 9 for I/P converter part numbers.
2. Item numbers in this procedure reference Figure 9-4.
3. This procedure only applies to Type AV2 positioners.
1. Transfer the positioner from automatic to manual operation
(Section 5).
2. Remove the positioner cover by removing the two cover screws.
3. Remove the two wires that connect the I/P converter (Item 80) to
the termination assembly (Item 59).
4. Loosen the three screws (Item 58) securing the I/P bracket.
REPLACEMENT PROCEDURES
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