Instruction Manual

Maintenance and Troubleshooting
September 2013
7-9
7. Apply silicone lubricant to the O-ring (key 36) and
install the O-ring over the 2-5/8 inch threads of the
terminal box. Use of a tool is recommended to prevent
cutting the O-ring while installing it over the threads.
8. Apply lubricant (key 63) to the 2-5/8 inch threads
on the terminal box to prevent seizing or galling when
the cap is installed.
9. Screw the cap (key 4) onto the terminal box.
10. Install a set screw (key 58) into the cap (key 4).
Loosen the cap (not more than 1 turn) to align the set
screw over one of the recesses in the terminal box.
Tighten the set screw (key 58).
11. Apply anti-seize (key 64) to the conduit entrance
plug (key 62) and install it into the unused conduit
entry of the terminal box.
Travel Sensor
For DVC6010 SIS, DVC6015, DVC6020 SIS
DVC6025, DVC6030 SIS, and DVC6035
Replacing the travel sensor requires removing the
digital valve controller from the actuator.
WARNING
To avoid personal injury or property
damage caused by fire or explosion,
remove power to the instrument
before removing the potentiometer in
an area which contains a potentially
explosive atmosphere or has been
classified as hazardous.
Disassembly
Note
If the feedback arm (key 79) or
feedback arm assembly (key 84) is
removed from the digital valve
controller, the travel sensor (key 77)
must be recalibrated.
DVC6010 SIS Digital Valve Controller and
DVC6015 Remote Feedback Unit
Refer to figure 8-1 for DVC6010 SIS and 8-6 for
DVC6015 key number locations.
1. Remove piping and fittings from the instrument.
2. Disconnect the adjustment arm from the connector
arm and the feedback arm (see figures 2-1 and 2-2).
3. Remove the instrument from the actuator.
4. Loosen the screw (key 80) that secures the
feedback arm (key 79) to the travel sensor shaft.
5. Remove the feedback arm (key 79) from the travel
sensor shaft.
If disassembling a DVC6010 SIS digital valve
controller, use step 6a. If disassembling a DVC6015
remote feedback unit, use step 6b.
6. a. Separate the module base from the housing by
performing the Removing the Module Base procedure.
b. Disconnect the three potentiometer assembly
wires from the terminal.
7. Remove the screw (key 72) that fastens the travel
sensor assembly to the housing.
8. Pull the travel sensor assembly (key 223) straight
out of the housing.
DVC6020 SIS Digital Valve Controller and
DVC6025 Remote Feedback Unit
Refer to figure 8-2 for DVC6020 SIS and 8-7 for
DVC6025 key number locations.
1. Remove piping and fittings from the instrument.
2. Remove the digital valve controller from the
actuator.
3. Disconnect the bias spring (key 82) from the
feedback arm assembly (key 84) and the arm
assembly (key 91). Remove the mounting bracket
(key 74) from the back of the digital controller. If the
torsion spring (key 93) needs to be replaced, ensure
that the shaft on which it is installed is smooth and
free of rough spots. Replace the entire feedback arm
assembly if necessary.
4. Loosen the screw (key 80) that secures the arm
assembly to the travel sensor shaft.
5. Remove the arm assembly (key 91) from the travel
sensor assembly (key 77) shaft.
If disassembling a DVC6020 SIS digital valve
controller, use step 6a. If disassembling a DVC6025
remote feedback unit, use step 6b.
6. a. Separate the module base from the housing by
performing the Removing the Module Base procedure.
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