Motor Protection; Connection Of Motor; Installation; General - Grundfos SQ Serie Montage- Und Betriebsanleitung

5.2 Motor protection

The motor incorporates thermal overload protection
and requires no additional motor protection.

5.3 Connection of motor

The motor incorporates a starter device and can
therefore be connected directly to the mains.
Start/stop of the pump will typically be done via a
pressure switch. See fig. 4.
The pressure switch must be rated for
Caution
the maximum amps of the specific
pump size.
N L
P
Fig. 4

6. Installation

6.1 General

Warning
Before starting any work on the pump/
motor, make sure that the power supply
has been switched off and that it cannot
be accidentally switched on.
Do not lower or lift the pump by means
Caution
of the motor cable.
The loose data plate supplied with the pump should
be fixed close to the installation site.

6.2 Assembly of pump part and motor

To assemble pump part and motor, proceed as
follows:
1. Place the motor horizontally in a vice and tighten
it. See fig. 6.
2. Pull the pump shaft out to the position shown in
fig. 5.
12
Pressure switch
Fig. 5
3. Grease the motor shaft end with the grease
supplied with the motor.
4. Screw the pump part on the motor (55 Nm).
Caution: The pump shaft must engage with the
motor shaft.
A spanner may be used on the clamping faces of
the pump part. See fig. 6.
Fig. 6
Motor (P2)
[kW]
0.70
1.15
1.68
1.85
When pump part and motor have been assembled
correctly, there must not be a clearance between
pump part and motor.

6.3 Removal of non-return valve

If a pump without non-return valve is required, the
valve can be removed as follows:
1. Cut off the legs of the valve guide using side-
cutting pliers or a similar tool. See fig. 7.
2. Turn the pump upside down.
3. Check that all loose parts fall out of the pump.
Fig. 7
SQE-NE is supplied without non-return
Note
valve.
The non-return valve can be fitted in a Grundfos
service workshop.
L
156 mm
L
[mm]
120
102
66
66