SERIES
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B
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14
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Differential Pressure Indicator Removal & Installation (Figure 6)
The differential pressure indicator supplies data to the electronic control unit which controls the
filter's self-cleaning process.
1. Disconnect the two control tubes from the differential pressure indicator.
2. Remove the 4 screws attaching the electronic control unit cover, disconnect and
remove the 9V battery.
3. Disconnect the electrical wiring from the control card terminals.
4. Remove the two nuts located at the bottom of the electronic control unit assembly.
5. Pull the differential pressure indicator out of the control assembly.
6. Insert a new differential pressure indicator into the control assembly.
7. Install the two nuts at the bottom of the electronic control unit assembly.
8. Connect the two control tubes to the differential pressure indicator (note that the high pressure
and the low pressure are connected to the right fittings).
9. Connect the electrical wiring to terminals D & P on the control card (See Figure 6).
10. Connect the 9V battery according to the correct polarity and secure the electronic control unit
cover with the 4 screws.
WARNING
Take precautions while operating the filter as the filter may enter a flushing
mode automatically, without prior warning.
11. For AC controlled filter, refer to Appendix 1.
12. 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.
13. Verify that the hydraulic flushing valve closes after 5 seconds.
14. Perform an additional flushing cycle manually, by operating the handle (turn clockwise 90
°
)
located on the solenoid (See Figure 3).