Emerson Fisher FIELDVUE DVC6000, Instruction Manual

Page: 37 / 162

Installation
September 2013 2-15
8. Install the external lock washer on the adjustment
arm. Position the adjustment arm in the slot of the
connector arm and loosely install the flanged hex nut.
9. Slide the adjustment arm pin in the slot of the
connector arm until the pin is in line with the desired
valve travel marking. Tighten the flanged hex nut.
10. Remove the alignment pin (key 46) and store it in
the module base next to the I/P assembly.
11. After calibrating the instrument, attach the shield
with two machine screws.
DVC6025 on Long-Stroke (4 to 24 Inch
Travel) Sliding-Stem Actuators and
Rotary Actuators
If ordered as part of a control valve assembly, the
factory mounts the remote feedback unit on the
actuator, makes pneumatic connections to the
actuator, sets up, and calibrates the instrument. If you
purchased the remote feedback unit separately, you
will need a mounting kit to mount the remote feedback
unit on the actuator. See the instructions that come
with the mounting kit for detailed information on
mounting the remote feedback unit to a specific
actuator model.
Note
Refer to the DVC6005 Base Unit
mounting instructions on page 2-13 for
off-actuator mounting instructions.
DVC6025 remote feedback units use a cam and roller
as the feedback mechanism. Figure 2-4 shows an
example of mounting on sliding-stem actuators with
travels from 4 inches to 24 inches. Some long-stroke
applications will require an actuator with a tapped
lower yoke boss. Figures 2-5 and 2-6 show examples
of mounting on rotary actuators.
Note
While the housing differs on the
DVC6025 and the DVC6020, feedback
parts are the same.
As shown in figure 2-5, two feedback arms are
available for the remote feedback unit. Most
long-stroke sliding-stem and rotary actuator
installations use the long feedback arm [62 mm (2.45
inches) from roller to pivot point]. Installations on 1051
size 33 and 1052 size 20 and 33 actuators use the
short feedback arm [54 mm (2.13 inches) from roller to
pivot point]. Make sure the correct feedback arm is
installed on the remote feedback unit before beginning
the mounting procedure.
Refer to figures 2-4, 2-5, and 2-6 for parts locations.
Refer to the following guidelines when mounting on
sliding-stem actuators with 4 to 24 inches of travel or
on rotary actuators:
1. Isolate the control valve from the process line
pressure and release pressure from both sides of the
valve body. Shut off all pressure lines to the
pneumatic actuator, releasing all pressure from the
actuator. Use lock-out procedures to be sure that the
above measures stay in effect while working on the
equipment.
2. If a cam is not already installed on the actuator,
install the cam as described in the instructions
included with the mounting kit. For sliding-stem
actuators, the cam is installed on the stem connector.
3. If a mounting plate is required, fasten the mounting
plate to the actuator.
4. For applications that require remote venting, a
pipe-away bracket kit is available. Follow the
instructions included with the kit to replace the existing
mounting bracket on the remote feedback unit with the
pipe-away bracket and to transfer the feedback parts
from the existing mounting bracket to the pipe-away
bracket.
5. Larger size actuators may require a follower arm
extension, as shown in figure 2-6. If required, the
follower arm extension is included in the mounting kit.
Follow the instructions included with the mounting kit
to install the follower arm extension.
6. Apply anti-seize (key 64) to the arm assembly pin
as shown in figure 2-7.
7. Mount the DVC6025 on the actuator as follows:
If required, a mounting adaptor is included in the
mounting kit. Attach the adaptor to the actuator as
shown in figure 2-5. Then attach the remote feedback
unit assembly to the adaptor. The roller on the remote
feedback unit feedback arm will contact the actuator
cam as it is being attached.
If no mounting adaptor is required, attach the
remote feedback unit assembly to the actuator or
mounting plate. The roller on the remote feedback unit
feedback arm will contact the actuator cam as it is
being attached.
8. For long-stroke sliding-stem actuators, after the
mounting is complete, check to be sure the roller
aligns with the position mark on the cam (see
2