Instruction Manual
D200158X012
4194S Controllers
July 2018
39
8. Connect link number 1 to the pivot arm.
9. Refer to the Maintenance Calibration and Flapper Alignment procedures.
10. Replace the proportional band indicator cover (key 36), and tighten two screws (key 6).
Link Number 3
1. Remove the two screws (key 6), and lift off the proportional band indicator cover (key 36).
2. Note where the link is connected. Disconnect link number 3 from set point adjustment assembly and the set point
beam assembly (key 23).
3. Install the replacement link with the screw head toward set point beam assembly as shown in figure 4-14, and in the
position noted in step 2.
4. Check that set point beam bias spring (key 28) is correctly located in frame bore and spring seat on the set point
beam assembly as shown in figure 4-5.
5. Adjust the proportional band between DIRECT and REVERSE.
6. Manually move the set point adjustment to 50 percent of scale. Adjust the screw on the link so that the edge of the
proportional band knob is parallel to the set point adjustment as shown in figure 3-1.
7. Refer to the Maintenance Calibration and the Flapper Alignment procedure.
8. Replace the proportional band indicator cover (key 36), and tighten the two screws (key 6).
Link Number 4
1. Remove the two screws (key 6), and lift off the proportional band indicator cover (key 36).
2. Note where the link is connected. Disconnect the link from the bellows bracket assembly (key 31) and the input
feedback assembly (key 11).
3. Connect the replacement link to the input feedback assembly so that the two adjusting screws on the link are
nearest to the feedback bellows bracket. The screw heads should face the bottom of the controller as shown in
figure 4-15, and be positioned as noted in step 2.
Figure 4-14. Link Number 3 Adjustment
W3445‐1
LINK 3
Figure 4-15. Position of Link Number 4 Adjusting
Screws
W3446
SCREW HEADS
SET POINT PIVOT ASSEMBLY
SCREW AND WASHER
(KEYS 19 AND 20)
1
SCREW AND WASHER
(KEYS 19 AND 20)
2
NOTES:
SCREW INSERTED INTO THE SET POINT PIVOT ASSEMBLY.
SCREW INSERTED INTO THE RELAY NOZZLE TUBING ASSEMBLY.
1
2