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English (US)
6.2.2 Pumped liquids
Submersible pumps are designed for pumping
the following liquids:
• clear and cold water that is free of air and
gasses
• clean, thin, non-explosive liquids without
solid particles or fibers.
Decreased pump performance and life
expectancy can occur if the water is not cold and
clear or contains air and gasses.
See the flow velocity table in section 10.1 Motor
cooling requirements.
When the pump and motor are used for pumping
water above the rated temperatures of the
motor, pay special attention to minimum water
flow past the motor for cooling. Water
temperature that exceeds motor rated
temperature directly shortens the motor life.
The Grundfos stainless steel submersible pump
is highly resistant to the normal corrosive
environment found in some water wells. If water
well tests show that the water has an excessive
or unusual corrosive quality, or exceeds the
motor temperature rating, contact your Grundfos
representative for information concerning
specially designed pumps for these applications.
6.3 Preparation
6.3.1 Checking of liquid in motor
The MS submersible motors are factory-filled
with SML-3 liquid, which is frost-proof down to -4
°F (-20 °C).
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.
Make sure that the filling screw is 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. 3 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.
Tor qu es:
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.
Fig. 3 Pump position during filling, MS
4000 and MS 402
CAUTION
This pump has been tested for use
with water only. Water temperature
should not exceed rated motor
temperature. SP pumps can
withstand water temperatures up to
140°F (60°C). Water temperature that
exceeds motor rated temperature
directly shortens the motor life. The
suitability of this pump for use with
liquids other than water is the
responsibility of the end user.
Flow rate, Q: 0.44 - 1475 gpm (0.1 - 335 m
3
/h)
Head, H: Maximum 2657 ft (810 m)
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.
Check the level of the liquid in the
motor, and refill the motor, if required.
Use clean water.
CAUTION
If frost protection is required, use
special Grundfos liquid to refill the
motor. Otherwise clean water may be
used for refilling. However, never use
distilled water.
TM00 6423 0606
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