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Piezo Replacement Instructions
These instructions describe the procedure for exchanging standard temperature (-4ºF to
176ºF/-20ºC to 80ºC) piezo module assemblies on the Flowserve Logix 3200IQ positioner
with low temperature (-40ºF to 176ºF/-40ºC to 80ºC) assemblies. These instructions
supplement the 3200IQ Installation, Operating, and Maintenance (IOM) Instructions (FCD
LGAIM0058-00).
1. Remove main housing cover and driver
module cover by unscrewing the covers.
WARNING: To prevent ignition of
hazardous atmospheres, disconnect supply
circuit before opening. Keep assembly
tightly closed when in operation.
2. Remove the plastic main control board (PCB)
cover by removing two (2) short cover screws,
and one (1) long cover screw.
3. Unplug the red and black 2-wire piezo connector.
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4. Disconnect the flexible tubing from the
barbed fitting on the driver module assembly
by hand .
5. Pull the red and black 2-wire piezo connector
through bottom of driver module housing.
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6. Loosen and remove the 9/64” Allen screws A
and B. Important: Loosen the screw
opposite the wire entry last. This screw is
retained by the piezo cover, and should only
be removed after screws A & B are removed
to avoid damaging the cover.
A
B
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7. Remove the piezo assembly.
8. Verify that the O-Ring is installed in base of
driver module housing (O-Ring may be stuck
to the bottom of the piezo assembly that was
just removed). A new O-Ring is included in
the low temperature assembly kit, in the
event that the original is lost or damaged
during disassembly .
9. Replace the current standard temperature
piezo assembly with the low temperature
assembly (Kit Number 218956.999.000). The
piezo assembly part is marked with a “-40” on
the bottom of the plastic housing.
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10. Attach the new piezo assembly to base of
modulator, installing and tightening the 9/64”
Allen screw opposite the wiring entry first, and
then installing and tightening Allen screws A and
B. All Allen screws should be installed hand
tight.
11. Reconnect the flexible tubing to the barbed
fitting by hand.
12. Insert the red and black piezo assembly
connector back through the housing, and attach
to the main PCB assembly , assuring the
connection is tight.
FIRST
A
B
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13. Insert and attach the plastic main PCB cover by
installing and tightening the two (2) short cover
screws, and one (1) long cover screw. Exercise
care to insure that the LED’s are properly align ed
so they aren’t bent or damaged by the cover as it
is being installed.
14. Perform a Quick-CAL to recalibrate the piezo
assembly and the positioner. Refer to the
3200IQ IOM for detailed calibration and
configuration instructions. (FCD LGAIM0058-00)
15. Replace the driver module cover and main
housing cover.
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