Electrical Connection; Starting Up The Product - Grundfos SPK 1 Montage- Und Betriebsanleitung

2.2 Electrical connection

WARNING
Electric shock
Death or serious personal injury
- Before starting any work on the product,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
- Connect the pump to an external main
switch close to the pump and to a
motor-protective circuit breaker or a
CUE frequency converter. Make sure
you can lock the main switch in OFF
position (isolated). Type and
requirements as specified in EN 60204-
1, 5.3.2.
The operating voltage and frequency are marked on
the pump nameplate. Please make sure that the
motor is suitable for the power supply on which it will
be used.
Single-phase Grundfos motors incorporate a thermal
overload switch and require no additional motor
protection.
Three-phase motors must be connected to a motor
starter.
The terminal box can be turned to four positions, in
90 ° steps, see fig. 3.
Proceed as follows:
1. Remove the coupling guards. Do not remove the
coupling.
2. Remove the four bolts securing the motor to the
motor stool.
3. Turn the motor to the required position.
4. Replace and tighten the four bolts.
5. Replace the coupling guards.
The electric motor must be connected to the supply
as shown in the diagram inside the terminal box
cover.
270˚
180˚
Fig. 3
6
0˚
90˚

3. Starting up the product

WARNING
Too high pressure and leakage
Death or serious personal injury
- Do not run the pump against a closed
outlet valve for more than approx. 5
minutes.
Before starting the pump, make sure:
• that all pipe connections are tight.
• that the pump body is partly filled with liquid
(partly submerged).
• that the strainer is not blocked by impurities.
Start the pump as follows:
1. Close the isolating valve on the outlet side of the
pump.
2. If the pump is fitted with a vent valve, this valve
must be opened, see fig. 4.
Fig. 4
3. See the correct direction of rotation of the pump
on the motor fan cover. When seen from the top,
the pump must rotate counterclockwise.
4. Start the pump and check the direction of
rotation.
5. Open the outlet isolating valve a little.
6. If the pump is fitted with a vent valve, this valve
must be closed when a steady stream of liquid
runs out of it.
7. Completely open the outlet isolating valve.
The pump has now been vented and is ready for
operation.
Vent valve