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contact opening gap compliant with
current local standards.
Single phase motors
The single phase motors are protected
against temperature and current overload
by means of thermal cutout devices in the
winding. The motor protection is reset au-
tomatically on elapse of the time required
for the electric motor to cool down. See
"quick troubleshooting guide".
Three phase motors
In the case of three phase motors, the
user is responsible for installing protec-
tion.
The electrical protection must be suitably
sized to ensure protection against over-
loads and short circuits.
Electrical connection
Electrical connections should be made
according to the diagram provided on the
inside of the terminal board cover (see
Figure 4)
OPERATION
Pump priming
The pump must only be started
up after it is filled with liquid.
If the pump has not been used
for a prolonged period, the filling
operation should be repeated
before starting up.
Pump installation below the liquid lev-
el (negative suction head) Figure 1
1. Close the shutoff valve downline of the
pump (delivery side).
2. Open the shutoff valve upline of the
pump (suction side).
3. Loosen the filler cap to enable release
of the air, the filling of the pump body
and suction line completely with liquid,
until it overflows from the hole.
4. Tighten the filler cap fully down.
5. Start up the pump and slowly open the
shutoff valve downline (delivery side) to
ensure bleeding of any residual air in
the pump body and accumulated pres-
sure during start-up.
The pump must never be operat-
ed with the shutoff valve on the
delivery side closed. The dis-
charge valve must be opened as soon as
the pump has been started up, to prevent
damage to the latter by an excessive in-
crease in liquid temperature.
Installation of self-priming pumps
above the liquid level (positive suction
head) Figure 2,
Figure 3 and
tion" Tab1.
1. Ensure that the pipeline downline of
the pump is free (delivery side)
2. Open the shutoff valve downline of the
pump (delivery side).
3. Open the shutoff valve upline of the
pump (suction side).
tion Figure 2
4. Open the valve near the pump to bleed
the air.
5. Remove the filler cap.
6. If a filler 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.
7. Using
a funnel, fill the pump body and
suction pipe (Figure 2), or only the
pump body (Figure 3) completely with
liquid,
until it overflows from the hole.
8. Close the pump filler cap.
ENGLISH
"Installa-
refer to installa-
19 19
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