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CH. 3 INSTALLATION
DANGER
Electric shock risk
WARNING
All SW pumps are self-priming. If the pump is used to suck water, it is advisable to install it as close
as possible to the source. All pumps should be installed in a ventilated area to ensure sufficient air
for cooling purposes. Suction pipes should be air-sealed and show no signs of bends and/or counter
slopes to avoid the formation of air locks that could impair the regular operation of the pump. Pumps
installed below the water level should be insulated from the system. It is advisable to fit an on-off
valve both on the delivery and suction side.
Pipes should be fitted in a position that protects the pump from vibrations, stresses and loads.
Therefore, pipe routes should be as short and direct as possible and avoid an excessive number
of bends to limit load losses. The delivery and suction pipes of SW 33 should have a minimum
diameter of 3". It is also necessary to make sure that there is sufficient space around the pump for
maintenance purposes.
CH. 4 ELECTRICAL CONNECTIONS
WARNING
DANGER
Electric shock risk
DANGER
Electric shock risk
Electric connections should be made using cables H07RN-F (external connections) or H05RN-F
or H07RN-F (internal connections). For connections, refer to Figure 2 (single phase motors) or 3
(three-phase motors). Single-phase motors have a continuously running condenser and an in-built
thermal protection in the motor winding. The protections for three-phase motors must be provided
by customers. The electric system will have to have a cut-off switch with singlepole switch.
CH. 5 STARTING THE UNIT
WARNING
WARNING
WARNING
4
When installing, please ensure pump is disconnected from
electrical supply.
Protect the pump and all pipes from bad weather or freezing
conditions.
Verify that the voltage and frequency of the pump shown on the
nameplate correspond to those available on the mains.
The installer must make sure that the electric system is grounded
in accordance with the law in force.
Make sure that the electric system has a high-sensitivity circuit
breaker D= 30 mA (DIN VDE 0100/739)
Use the pump for the applications listed on the nameplate.
Do not operate the pump without fluids.
Do not oparate the pump when the interception valve on the
delivery side is completely close
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