Positioner Mounting (3610, Dvc6020, Or Dvc6200); Top-Mounted Handwheel - Emerson Fisher 2052 Instruction Manual

2052 Actuator
June 2017
5. Install the end plate assembly (key 3).
6. Adjust the travel stop bolts to the correct position so that the travel indicator screws (key 22) align with the travel
scale screws (key 20). See figure 3.
7. Install the guide assembly (key 48) size 3 only.
8. Install the spring(s). The outer (larger diameter) spring is standard for the single spring size 1 & 2 constructions. The
inner spring is standard for the single spring size 3 construction.
9. Place the diaphragm plate (key 6) onto the spring(s). It is important that the springs be properly seated in their
respective counterbores on the bottom side of the plate. If necessary, push or pull the diaphragm plate toward
center to ensure the springs are engaged into their respective seats.
10. Lubricate the socket head capscrew (key 7) and tighten per table 6.
11. Place the diaphragm (key 11) on the diaphragm plate (key 6), making certain it is properly centered.
12. Observe the correct position of the loading connection fitting and install the top casing assembly (key 5). Replace
the cap screws and nuts (keys 8 and 9) which secure the top casing assembly to the actuator housing. Tighten the
nuts in an alternating fashion (see table 6).
13. Install the inlet piping to the top casing assembly.
14. Refer to the Actuator Mounting procedure and proceed as applicable.

Positioner Mounting (3610, DVC6020, or DVC6200)

1. Before installing the positioner, the positioner cam must be installed on the lever.
2. Refer to assembly step 2 in the previous section on Changing or Replacing Actuator Lever.
3. Refer to the positioner instruction manual for setup and calibration procedures.
Top‐Mounted Handwheel (Size 1 and 2)
Key numbers used in this procedure are shown in figure 9 except where indicated.
The optional top‐mounted handwheel can be used as a manual actuator for intermittent service. It is not to be used as
an adjustable travel stop. This is built into the housing.
The handwheel assembly is welded to a special top casing assembly (key 5, figure 9). A hex nut (key 43) locks the
handwheel in position. For field installation of a handwheel, the special upper diaphragm casing is supplied with the
handwheel.
Turning the handwheel (key 32) clockwise into the upper casing forces the pusher plate (key 36) against the
diaphragm and diaphragm plate (keys 11 and 6, figure 7) to compress the inner and outer springs (keys 12 and 13,
figure 7) and move the diaphragm rod assembly downward. Turning the handwheel counter‐clockwise allows the
actuator spring(s) to move the diaphragm rod assembly upward.
CAUTION
Damage to the handwheel screw can occur if the handwheel is over-rotated in the counter-clockwise direction. The
handwheel should not continue to be rotated once the actuator reaches the up stop and resistance to turning the
handwheel significantly drops.
Instructions are given below for complete disassembly and assembly required for inspection and parts replacement.
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Instruction Manual
D103296X012