TapFlo Guardian system Mk3.1, Operation & Maintenance Manual

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DEAD-HEAD & RESTART (DH&R)
Issue : 020913-B TPUK-GU31X 33
1. Using a flat bladed screwdriver adjust the set point regulator adjustment
screw (Fig.GEN-01, 2) of the Guardian anti-clockwise until it turns freely.
2. Connect the pressure source to media connection.
3. Plug all other open ports, except reset I/P.
4. Connect an air supply to air in connection.
5. Connect a gauge or visual indicator to DH&R O/P connection.
6. Turn the air supply on.
7. The gauge should indicate system pressure or the visual indicator should
be set.
8. Apply the required set point pressure.
9. Slowly increase the set point regulator adjustment screw (Fig.GEN-01, 2)
(clockwise) until the DH&R O/P signal disappears.
10. Remove the set point pressure and the DH&R O/P signal should return.
11. Reapply the set point pressure and the DH&R O/P signal should
disappear. If not repeat steps 6-10.
12. The set point is now adjusted and the system is ready for use.
Calculated
This method of set up is used when the set point pressure is known. The
Guardian’s set point is simply adjusted to a specific pressure using an
external pressure gauge connected to the ‘set point O/P’ connection.
1. Remove the M5 plug and connect an external pressure gauge to the ‘set
point O/P’ connection .
2. Plug all other open ports, except reset I/P.
3. Using a flat bladed screwdriver adjust the set point regulator adjustment
screw (Fig.GEN-01, 2) of the Guardian anti-clockwise until it turns freely
4. Turn the air supply on.
5. Slowly increase the set point regulator adjustment screw (Fig.GEN-01, 2)
(clockwise) until the pressure gauge indicates 0.5 Bar below the required
set point (i.e. 3.0 bar switching = 2.5 bar set).
6. Turn off the air supply.
7. Remove the pressure gauge, and re-install the M5 plug.
8. The set point is now adjusted and the system is ready for use.
Operation
•
To start the pump, apply compressed air to the pump and Guardian.
•
The pump should continue to run until either
1.
Air to the pump or guardian is interrupted.
2. The pump/Guardian experiences a dead-head condition, which
stops the pump.
3. The pump will re-start automatically when the dead-head condition
is removed.
•
To stop the pump, interrupt the air to the pump and/or Guardian.