Grundfos SP Series Installation And Operating Instructions Manual page 5

3.2.1 Checking of liquid in motor
The SP submersible motors are factory-filled with
a special non-poisonous 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 must
Note
be refilled, if required. Use clean
water.
If frost protection is required,
special Grundfos liquid must be
used to refill the motor. Otherwise
Caution
clean water may be used for refilling
(however, never use distilled water).
Refilling of liquid is carried out as described
below.
3.2.2 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. 1.
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, fig. 1, 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 pump.
Torques:
MS 4000: 3.0 Nm.
MS 402: 2.0 Nm.
The submersible pump is now ready for
installation.
MS 4000
Fig. 1 Pump position during filling – MS 4000
and MS 402
3.2.3 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. 2.
• On pumps delivered directly from Grundfos,
the liquid level has already been checked.
•
Filling procedure:
The filling hole for motor liquid is placed at the
top of the motor.
1. Position the submersible pump as shown in
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling
4. Replace the screw in the filling hole and
Torque: 3.0 Nm.
The submersible pump is now ready for
installation.
3.2.4 Grundfos submersible motors MMS
MS 402
Filling procedure:
1. Place the motor at a 45 ° angle with the top of
2. Unscrew the plug A and place a funnel in the
3. Pour tap water into the motor until the motor
4. Remove the funnel and refit the plug A.
Caution
The submersible pump is now ready for
installation.
In the case of service, the liquid level must be
checked, see fig. 2.
fig. 2.
The filling screw must be at the highest point
of the motor.
syringe, fig. 2, until the liquid runs back out of
the filling hole.
tighten securely before changing the position
of the pump.
Fig. 2 Motor position during filling – MS6 and
MS 6000
6000, MMS 8000, MMS 10000 and
MMS 12000
the motor upwards, see fig. 3.
hole.
liquid inside the motor starts running out at A.
Caution: Do not use motor liquid as it
contains oil.
Before fitting the motor to a
pump after a long period of
storage, lubricate the shaft seal
by adding a few drops of water
and turning the shaft.
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