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6.3 – DP Indicator Removal & Installation
The differential pressure indicator supplies data to the electronic control unit, which
controls the filter's self-cleaning process.
1. Set the main switch at the control panel to "0" position.
2. Close the inlet and outlet valves of the filter and verify that filter is drained prior
to service.
3. Disconnect the two control tubes from the differential pressure indicator.
4. Remove the 4 screws attaching the electric connection box.
5. Disconnect the electrical wiring from the electric terminal in the connection box.
6. Remove the two nuts located at the bottom of the electronic control unit
assembly and remove the screws.
7. Pull the differential pressure indicator out of the control assembly.
8. Insert a new differential pressure indicator into the control assembly.
9. Install the two screws and nuts at the bottom of the electronic control unit
assembly.
10. Connect the two control tubes to the differential pressure indicator [note that the
high pressure and the low pressure connected to the right fittings.
Take precautions while operating the filter as the filter may enter a flushing
11. Connect the electrical wiring to terminals D and P on the electric terminal
connection box.
12. Set the main switch at the control panel to "1" position.
13. Perform a flushing cycle by disconnecting the low pressure tube from the
differential pressure indicator (closing of the electrical circuit) – re-connect it
immediately as flushing start.
14. Verify that the hydraulic flushing valve closes after 15 seconds.
15. Perform a flushing cycle by pressing the MANUAL FLUSH switch at the control
panel.
12
WARNING
mode automatically, without prior warning.
Figure 6: DP Indicator Removal & Installation
AF9800
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