Pentair STA-RITE WP/MULTI EVO-A Handleiding pagina 21
Beschikbare talen
Beschikbare talen
The check valve in Figure 3 serves to prevent emptying of the pump under a siphon effect at the time of shutdown, so that liquid stays
in the pump body for subsequent startup.
DANGER
If there is no foot valve or check valve on the suction port, filling must be repeated before each start-up.
DANGER
If the pump has difficulty in increasing pressure, repeat operations 1 to 10. If, after several attempts, the pump does not
operate correctly, see the fault section "quick troubleshooting guide"
Pressure switch adjustment (Figure 4)
The pressure switch on/off pressure values are set in the factory.
This section explains how to change the pressure switch settings to adapt it to the system characteristics.
•
Loosen the differential nut (1)
completely;
•
Adjust the minimum intervention
nut (2) to set the contact closing
Pump start-up
DANGER
Use the electric pump according to the performance specifications as stated on the data plate. Before using the pump, read
Application chapter for a proper use.
DANGER
Always avoid operation of the pump with the upline shutoff valve closed (suction side). Dry running of the pump can lead to
overhearing and damage to the pump itself.
DANGER
Never run the pump with the shutoff valve downline (delivery side) completely closed. In this case, the water in the system
reaches very high temperatures, with the risk of damage to equipment and scalding in the event of escape of the liquid. In
this situation, turn off the pump and leave the system to cool.
DANGER
Never use the pump in the event of cavitation, as this can cause damage to the hydraulic components.
DANGER
Pressure on the downline side of the pump (delivery side) must never exceed the maximum operating pressure PN as
indicated on the pump data plate (see "Application Limits" Figure 5). Pressure downline of the pump is obtained from the
sum of the pressure delivered and the pressure on the suction side (gravity for installations with negative suction head,
aqueducts, or water system where admissible or required).
1. Check that the shutoff valves
downline of the pump (delivery side)
and upline of the pump are in the
open position.
value (pump startup); when turned
clockwise, the start pressure
is increased, and vice versa is
decreased;
2. Start the pump.
3. If the pump does not start up
correctly, on reaching the operating
conditions in a short time, the pump
shuts down.
•
Tighten the differential nut (1) to
obtain the required cutoff pressure.
4. In this case repeat the "Pump priming"
phase.
EN
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