TapFlo Guardian system Mk3.1, Руководство по эксплуатации и техническому обслуживанию

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DEAD-HEAD & RESTART (DH&R)
Issue : 020913-B TPUK-GU31X 32
Set point adjustment
The Guardian’s set point must be set to the desired trip pressure.
There are three ways to set the Guardian’s set point;
Representative, Direct or Calculated.
To adjust the set point you will require a small flat bladed screwdriver.
Note : DH&R system functionality relies on the discharge of the pump
exceeding the set point of the Guardian, with a minimum of circa 0.5-1.0 bar.
Note : The visual indicator/reset button is not used for DH&R functionality.
Representative
This method of set up adjusts the Guardian to the application by creating the
condition in-situ.
1. Using a flat bladed screwdriver adjust the set point regulator adjustment
screw of the Guardian anti-clockwise until it turns freely.
2. Turn the air supply on.
3. The pump should not start.
4. Slowly increase the set point regulator adjustment screw (Fig.GEN-01, 2)
until the pump starts.
5. Increase the set point regulator clockwise by a further half turn.
6. The pump can be started and stopped normally by turning the supply to
the Guardian on/off, however if not (or it stops the pump erratically)
increase the set point regulator clockwise in half turn increments until the
pump runs consistently.
7. Test the system operates by starting the pump and creating the dead-head
scenario by closing the discharge valve and ensure the Guardian trips and
the pump stops. To test the guardian’s state press the reset button and it
should remain in.
8. Remove the dead-head by opening the discharge valve, the pump should
start automatically and the reset button should pop out.
If not repeat steps 1-7 to check the set point adjustment.
9. The set up is now complete and the system is ready for use.
Direct
This method of set up is used when the set point pressure is known. The
Guardian’s set point is adjusted using an external source to generate the set
point pressure, such as a calibrated air pressure regulator and gauge or a
pressure calibrator. This method requires the Guardian to be removed from its
installed position and the calibration pressure applied directly to the media
connection.
A spare fluid side can be purchased as a test rig, see maintenance section of
this manual.