Electrical Connection - Saci OPTIMA Manuel D'installation Et D'entretien

It is very important that both the suction and impulsion piping are independently supported and correctly fixed in
place so that the pump does not have to support their weight nor the vibration produced by the water flow though
them. In a situation where a long length of impulsion piping is used, we recommend the installation of a check valve
to prevent the water hammer produced by the return of the water causing any damage when the pump stops.
If flexible piping is employed, it should be the non-compressible type.
When making the connections to the pump, totally clean connections should always be used, with the thread in
perfect conditions and leak-tightness should be obtained only through the use of Teflon tape, (glues or similar
products should not be employed). These connection should be slowly tightened, with special care not to strip the
internal thread of the pump by over-tightening.

8. ELECTRICAL CONNECTION

Before carrying out any maintenance on the electrical part of the motor, it should be disconnected from
the electricity supply.
System protection should be based on a differential breaker (Ifn = 30 mA).
All our single-phase motors incorporate thermal protection that will disconnect the pump if the motor temperature
increases due to an overload and will then connect the electricity supply again once the temperature has dropped
to within normal levels again.
For three-phase versions, the user should provide appropriate protection in accordance with current regulations.
It is essential to connect the pump to a suitable ground.
The following diagram, should be used when making the electrical connections to the pump terminals.
MEC 63-71 Monof
M
W2
230 V
U1
V1
R
SINGLE PHASE
THREE PHASE
U2
V2
W1
T
S
MEC 80 Monof
W2
400 V
U1
R
8
ENGLISH
U2
V2
V1
W1
T
S