Electrical Connection; Starting Up The Product; Priming The Pump; Starting The Pump - Grundfos SCALA Installation And Operating Instructions Manual

3.7 Electrical connection

3.7.1 Plug connection
Warning
Check that the voltage and frequency of
the product match voltage and frequency
of the installation site.
Warning
If the power supply cable is damaged, it
must be replaced by the manufacturer, his
service agent or similarly qualified persons
in order to avoid hazard.
Warning
As a precaution, the product must be
connected to a socket with earth
connection.
We recommend that you fit the permanent
installation with an earth leakage circuit
breaker (ELCB) with a tripping current < 30
mA.
The pump incorporates current and temperature
dependent motor protection.
3.7.2 Connections without plug
Warning
The electrical connection must be carried
out by an authorised electrician in
accordance with local regulations.
Warning
Before making any connections in the
product, make sure that the power supply
has been switched off and that it cannot be
accidentally switched on.
The product must be connected to an
external mains switch with a contact gap of
at least 3 mm (0.12 inch) in all poles.

4. Starting up the product

Do not start the pump until it has been
filled with liquid.

4.1 Priming the pump

1. Unscrew the priming plug and pour minimum 1.7
litres (0.45 gallons) of water into the pump
housing. See fig. 9.
2. Screw the priming plug on again.
If the suction depth exceeds 6 m (20 ft), it
may be necessary to prime the pump more
than once.
Always tighten priming and drain plugs by
hand.
8

4.2 Starting the pump

1. Open a tap to prepare the pump for venting.
2. Insert the power plug into the socket or turn on
the power supply and the pump will start.
3. When water flows without air, close the tap.
4. Open the highest tapping point in the installation,
preferably a shower.
5. Adjust the pressure to the required pressure by
means of the buttons.
6. Close the tapping point.
Startup has been completed.
Fig. 9 Priming the pump

4.3 Shaft seal run-in

The shaft-seal faces are lubricated by the pumped
liquid, meaning that there may be a certain amount
of leakage from the shaft seal.
When the pump is started up for the first time, or
when the shaft seal has been replaced, a certain
run-in period is required before the leakage is
reduced to an acceptable level. The time required for
this depends on the operating conditions, that is,
every time the operating conditions change, a new
run-in period will be started.
Under normal conditions, the leaking liquid will
evaporate. As a result, no leakage will be detected.