Installation; Positioner Mounting - Fisher 4070 Instruction Manual

Installation

Typically, the positioner is ordered with the actuator. If
so, the factory mounts and calibrates the valve posi-
tioner and connects the positioner output to the actua-
tor. If the positioner is ordered separately from the ac-
tuator, perform the mounting procedure. Refer to the
appropriate instruction manuals for actuator and valve
installation procedures.
WARNING
Avoid personal injury from sudden re-
lease of process pressure. Before
mounting the positioner on a valve in
service:
Disconnect any operating lines pro-
viding air pressure or a control signal to
the actuator. Be sure the actuator can-
not suddenly open or close the valve.
Use bypass valves or completely
shut off the process to isolate the valve
from process pressure. Relieve process
pressure on both sides of the valve.
Drain the process media from both
sides of the valve.
Vent actuator loading pressure and
relieve any actuator spring precompres-
sion.
Use lock-out procedures to be sure
that the above measures stay in effect
while you work on the equipment.

Positioner Mounting

Remove the storage seal, shown in figure 2, from the
connection block, mount the positioner on the actua-
tor, and make connections to the instrument.
The mounting bracket (key 7B) is used for side mount-
ing the positioner to the actuator yoke. Refer to
figure 3 for part locations.
1. Attach the mounting bracket (key 7B) to the posi-
tioner with the two hex head bolts (key 7D) as shown
in figure 3.
2. Adjust the pin on the feedback lever arm assembly
(key 2) for the appropriate actuator travel (see figure
4). For actuators with 3/4-inch (19.1 mm) travel or
less, use the 30 degree markings. For actuator travels
greater than 3/4-inch (19.1 mm), use the 60 degree
markings.
Type 4060 & 4070
A7226 / IL
Figure 2. Storage Seal Location
3. Attach the feedback lever arm assembly to the po-
sitioner spindle with the flat head screw as shown in
figure 4.
The stem connector bolts may not be
long enough to permit mounting the
feedback bracket with spacers. If not,
replace the stem connector bolts with
the bolts included in the mounting kit
(key 7G). See the actuator instruction
manual for information on installing the
stem connector.
4. Place the feedback bracket (key 7A), with spacers
(key 7E), over the stem connector bolts so that the
slot in the feedback bracket (key 7A) is opposite the
actuator travel indicator. Fasten the feedback bracket
in place with two hex nuts (key 7F).
5. Position the actuator to its mid-travel position using
a handwheel or manual loading regulator.
In the next step. loosening the cam lock-
ing nut inside the positioner may aid po-
sitioner mounting. See figure 9 for cam
locking nut location.
6. With the actuator at its mid-travel position, insert
the mounting bolt (key 7C) through the slotted hole in
the mounting bracket (key 7B).
7. Attach the bracket to the actuator yoke leg oppo-
site the travel indicator web. Leave the mounting bolt
loose. Be sure the feedback lever assembly pin en-
gages the feedback bracket slot.
8. Position the positioner mounting bracket (key 7B)
so that the feedback lever arm assembly (key 2) is
Note
Note
3