MAINTENANCE
Cleaning the Flow Piston
18
Re-calibration of Control Head
There are times, especially after servicing, that the Inline 400 needs to be re-calibrated. This is necessary in
order to re-establish a reference point for the indication of flow.
Follow these procedures for Field Flow Calibration:
1. Remove power from the unit by unplugging it or turning off the circuit breaker (if a 50 Hz direct wired
model).
2. Verify there is no water flowing in the system. This will ensure that the flow piston is in the fully seated
(zero flow) position.
3. While holding down the push button (3) on the status display, plug the
unit’s power cord into the power receptacle (or switch on the breaker, if a
50 Hz direct wired model). Continue holding down the button for five sec-
onds until both the green and red LEDs blink, indicating calibration is com-
plete. Release the button and the red LED should come on solid, indicating
calibration was successful.
4. Open valves/taps to begin water flow and confirm unit is operating properly.
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