Pentair Flotec EVO-MULTIPRESS 340 SX LOGIC SAFE Manual De Uso página 25

INSTALLATION OF SELF-PRIMING PUMPS ABOVE THE LIQUID LEVEL (POSITIVE SUCTION HEAD) FIGURE 2, FIGURE 3 AND
"INSTALLATION" TAB1.
Ensure that the pipeline downline
1.
of the pump is free (delivery side)
Open the shutoff valve downline
2.
of the pump (delivery side)
Open the shutoff valve upline of
3.
the pump (suction side). refer to
installation Figure 2
Open the valve near the pump to
4.
bleed the air
Remove the filler cap. If a filler
5.
cap is fitted on the pipeline
downline of the pump (delivery
side), remove the cap and use the
hole for filling. Otherwise use the
pump filling hole
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 start-up.
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 11. 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
Using a funnel, fill the pump
6.
body and suction pipe (Figure 2),
or only the pump body (Figure
3) completely with liquid, until it
overflows from the hole
Close the pump filler cap
7.
If the filler hose is on the
8.
pipeline, continue to fill the pipe
and pump until water overflows
also from this second hole
Insert the second filler cap
9.
• Adjust the minimum intervention
nut (2) to set the contact closing
value (pump start-up); when
turned clockwise, the start
pressure is increased, and vice
versa is decreased
USE AND MAINTENANCE MANUAL
Start up the pump and wait for
10.
the liquid to be pumped. The
pump can run for 5 minutes
to attempt to activate liquid
suction. If the pump does not
generate pressure and flow rate,
repeat steps 1 to 10
• Tighten the differential nut (1)
to obtain the required cut-off
pressure
EN
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