Flowserve AF-17 Electronic Positioner - Manual (Page 11)

WCAIM2031 AF-17 Electronic Positioner: Installation, Operation and Maintenance 11
3.3 Mounting Circuit Board
3.3.1 For 120/240 VAC 10-23 Size Electric Actuators
See Figure 3.
A. Mount these brackets to the actuator motors or spacers as provided. The longer bracket is mounted to the right side of
the actuator when facing the terminal strip using the motor mounting screws. Mount transformer support bracket to limit
switch using existing switch screw.
B. Remove and replace motor screws carefully to avoid stripping the threads of these self-tapping screws.
C. Once these motor screws and brackets are firmly secured, firmly tap the motor stator to force realignment of the top
motor bearing.
D. Loosen all actuator terminal strip screws necessary to connect the circuit board’s wiring to the terminal strip. See manual
Part 3.4 for proper wiring of circuit board to the actuator’s terminal strip. Wire routing is important. Ensure that wiring is
not pinched and is not near cams or mechanical brake.
E. Assemble circuit board into actuator. Slide rubber grommets onto insulating board. Put nylon washers under heads of
self-tapping screws. (Six screws will be used to install the circuit board onto the brackets).
F. Place circuit board over brackets. Feed the three feedback potentiometer wires up through the hole in the circuit board
near potentiometer R29. See Figure 3 below and Figure 1 on page 6. Loosely fasten board to brackets using mounting
screws. Use a nylon washer and a rubber grommet on the self-tapping screw securing the left front corner of board to
transformer support bracket when facing terminal strip. NOTE: For 23 size only, use spacer (10) in place of grommet.
Wire potentiometer to the AF-17 board per paragraph 3.2.3.
G. The circuit board is wired to the terminal strip as shown in Part 3.4.
H. Snug down the circuit board and secure mounting screws such that grommets are about half compressed.
View Shown from the capacitor end of the 75 actuator (Capacitor not shown for pictorial clarity)
Flow Control Division
Worcester Controls
Figure 3
10-23 Size 75 Actuators
Item Description
1 Circuit Board Sub-Assembly
2 Insulating Board
3 Bracket-Right (Long)
4 Grommet-Rubber
5 Mtg. Screws (Circuit. Board)
6 Washer – Nylon
7 Bracket – Left (Short)
8 Mtg. Screws (Bracket)
9 Spacer (Bracket)
10 Spacer (2375 AC Only)
11 Transformer Support Bracket