Motor Protection; Connection Of Motor; Installation; General - Grundfos SQ Notice D'installation Et D'entretien

The earth leakage circuit breaker must be marked
with the following symbol:
Supply voltage:
1 x 200-240 V –10%/+6%, 50/60 Hz, PE.
The current consumption can only be measured by
means of a true RMS instrument. If other instruments
are used, the value measured will differ from the
actual value.
On SQ/SQE pumps, a leakage current of 2.5 mA at
230 V, 50 Hz, can typically be measured. The leak-
age current is proportional to the supply voltage.
The SQE and SQE-NE pumps can be connected to a
control box, type CU 300 or CU 301.
Note: The pump must never be connected to a
capacitor or to another type of control box than
CU 300 or CU 301.
The pump must never be connected to an external
frequency converter.

4.2 Motor protection

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

4.3 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.
Note: The pressure switch must be rated for the
maximum amps of the specific pump size.
Fig. 4
N L
Pressure switch
P

5. Installation

5.1 General

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

5.2 Assembly of pump part and motor

To assemble pump part and motor, proceed as fol-
lows:
1. Place the motor horizontally in a vice and tighten
Fig. 5
2. Grease the motor shaft end with the grease sup-
3. Screw the pump part on the motor. A spanner
When pump part and motor have been assembled
correctly, there must not be a clearance between
pump part and motor.

5.3 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-cut-
2. Turn the pump upside down.
3. Check that all loose parts fall out of the pump.
Fig. 6
Note: SQE-NE is supplied without non-return valve.
The non-return valve can be fitted in a GRUNDFOS
service workshop.

5.4 Fitting the cable plug to the motor

The cable plug supplied with the motor is factory-
greased. Check that the plug is greased correctly.
To fit the cable plug, proceed as follows:
1. Check that the cable is of the correct type, cross-
2. Check that the mains on the location has correct
3. Check that the motor socket is clean and dry.
it, see fig. 5.
100 mm
30 mm
plied with the motor.
may be used on the clamping faces of the pump
part, see fig. 5.
ting pliers or a similar tool, see fig. 6.
section and length.
connection to earth.
7