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Instruction Manual
D200158X012
Figure 4-9. Exploded View of Flexure Pivot Assembly
FOUR SCREWS
(KEY 10)
W3453
19. Align flapper leveling screw number 2 (see figure 3-1 for screw location) with the centerline of the oblong hole in
the frame as shown in figure 4-8. Tighten the screw (key 12). Make sure link 4 does not touch the frame.
20. Disconnect link number 1 from the pivot assembly,and manually position the process pointer to 100 percent of the
scale. Refer to figure 4-12 for location of link.
21. Adjust the length of link number 2 by turning the adjustment screw clockwise to increase the length or
counterclockwise to decrease the length, so that the pin on the end of the link is approximately one‐half of its
diameter short of aligning with the hole in the input feedback beam assembly, as shown in figure 4-10.
22. Connect link number 2 to the input feedback beam assembly.
23. Connect link number 1 to the pivot assembly.
24. Adjust the proportional band between DIRECT and REVERSE. Do this by aligning the tab on the proportional band
knob with the hole in the set point beam assembly as shown in figure 4-6.
25. Position the proportional band knob nozzle pivot and set point beam assembly on the frame, and install the relay
nozzle tubing fitting loosely into frame manifold while positioning the nozzle in the center of the flapper as shown
in figure 4-7.
26. Install the screw (key 19) through the frame (key 3) into the set point pivot assembly (key 23). Do not tighten.
27. Slide the set point pivot assembly (key 17) toward the set point beam until the cone lightly contacts the set point
beam, and tighten the screws. The proportional band should fall freely when the controller is in the upright
position. If it does not, reposition the set point pivot assembly (key 17).
28. Tighten the relay nozzle tubing nut (key 18). Apply supply pressure and check for leaks. Disconnect the supply
pressure.
29. Install the washer (key 20) on the screw (key 19).
30. Install the screw (key 19) through the frame (key 3) and into the relay nozzle tubing assembly (key 18). Tighten the
screw. Ensure the nozzle remains centered on the flapper with the set point beam assembly slid snugly towards the
relay nozzle tubing assembly.
FLEXURE PIVOT
ASSEMBLY
INPUT FEEDBACK
BEAM ASSEMBLY
4194S Controllers
July 2018
33
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