Preparation; Checking Of Liquid In Motor - Grundfos SP Instrucciones De Instalación Y Funcionamiento

6.3 Preparation

Warning
Before starting work on the pump,
make sure that the power supply
has been switched off and that it
cannot be accidentally switched
on.

6.3.1 Checking of liquid in motor

The MS submersible motors are factory-filled
with a special drinking water approved liquid,
which is frost-proof down to -4 °F (-20 °C).
The level of the liquid in the motor
must be checked, and the motor
Note
must be refilled, if required.
Use clean water.
If frost protection is required,
special Grundfos liquid must be
used to refill the motor.
Caution
Otherwise clean water may be used
for refilling (however, never use
distilled water).
Carry out refilling of liquid as described below.
6.3.2 Grundfos submersible motors MS 4000
and MS 402
The filling hole for motor liquid is placed in the
following positions:
MS 4000: In the top of the motor.
MS 402: In the bottom of the motor.
1. Position the submersible pump as shown in
fig. 3.
The filling screw must be at the highest point
of the motor.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling
syringe as shown in fig.
back out of the filling hole.
4. Replace the screw in the filling hole and
tighten securely before changing the position
of the pump.
Torques:
MS 4000: 2.2 ft-lbs (3.0 Nm).
MS 402: 1.5 ft-lbs (2.0 Nm).
The submersible pump is now ready for
installation.
3 until the liquid runs
MS 4000
Fig. 3 Pump position during filling -
MS 4000 and MS 402
6.3.3 Grundfos submersible motors MS6 and
MS 6000
• If the motor is delivered from stock, the liquid
level must be checked before the motor is
fitted to the pump. See fig. 4.
• On pumps delivered directly from Grundfos,
the liquid level has already been checked.
• In the case of service, the liquid level must
be checked. See fig. 4.
Filling procedure:
The filling hole for motor liquid is placed in the
top of the motor.
1. Position the submersible pump as shown in
fig. 4.
The filling screw must be at the highest point
of the motor.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling
syringe (see fig. 4) until the liquid runs back
out of the filling hole.
4. Replace the screw in the filling hole and
tighten securely before changing the position
of the motor.
Torque: 2.2 ft-lbs (3.0 Nm).
The submersible pump is now ready for
installation.
Fig. 4 Motor position during filling - MS6
and MS 6000
MS 402
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