Diameter Of Pump/Motor; Liquid Temperatures/Cooling; Maximum Liquid Temperature; Pipework Connection - Grundfos SP Serie Montage- Und Betriebsanleitung

If the pump is installed horizontally, the discharge port should
never fall below the horizontal plane, see fig. 8.
Fig. 8 Positional requirements
If the pump is installed horizontally, e.g. in a tank, it is
recommended to fit it in a flow sleeve.
4.2.1 Motors suitable for horizontal installation
Power output
Motor type
MS
MMS 6000
MMS 8000
MMS 10000
MMS 12000
When Franklin 4" submersible motors up to and including 2.2 kW
are started more than 10 times a day, it is recommended to
incline the motor at least 15 ° above the horizontal plane in order
to minimize wearing of the upthrust disc.
During operation, the suction interconnector of
the pump must always be completely submerged
Caution
in the liquid.
Warning
If the pump is used for pumping hot liquids
(40 to 60 °C), it must be ensured that persons
cannot come into contact with the pump and the
installation, e.g. by installing a guard.

4.3 Diameter of pump/motor

The maximum diameter of the pump/motor is as shown in the
tables on pages 155 and 156.
It is recommended to check the borehole with an inside calliper to
ensure unobstructed passage.

4.4 Liquid temperatures/cooling

The maximum liquid temperature and the minimum liquid velocity
past the motor appear from the following table.
It is recommended to install the motor above the well screen in
order to achieve proper motor cooling.
In cases where the stated liquid velocity cannot
Caution
be achieved, a flow sleeve must be installed.
If there is a risk of sediment build-up, such as sand, around the
motor, a flow sleeve should be used in order to ensure proper
cooling of the motor.

4.4.1 Maximum liquid temperature

Out of consideration for the rubber parts in pump and motor, the
liquid temperature must not exceed 40 °C (~105 °F). See also the
following table.
The pump can operate at liquid temperatures between 40 °C and
60 °C (~105 °F and 140 °F) provided that all rubber parts are
replaced every third year.
Allowed
Not allowed
Power output
50 Hz 60 Hz
[kW] [kW]
All sizes All sizes
3.7 to 30 3.7 to 30
22 to 92 22 to 92
75 to 170 75 to 170
147 to 220 –
Motor
Flow past
the motor
Grundfos
MS 402
0.15 m/s
MS 4000
MS 6000
Grundfos
MS 4000I* 0.15 m/s
MS 6000I*
Grundfos
0.15 m/s
MS6T30
Grundfos
1.0 m/s
MS6T60
0.15 m/s
Grundfos
MMS
0.50 m/s
Franklin
0.08 m/s
4"
Franklin
0.16 m/s
6" and 8"
* At an ambient pressure of minimum 1 bar (1 MPa)
For 37 kW MMS 6000, 110 kW MMS 8000 and
170 kW MMS 10000, the maximum liquid
temperature is 5 °C lower than the values stated
Note
in the above table.
For 190 kW MMS 10000, the temperature is 10 °C
lower.

4.5 Pipework connection

If noise may be transmitted to the building through the pipework,
it is advisable to use plastic pipes.
Plastic pipes are recommended for 4" pumps
Note
only.
When plastic pipes are used, the pump should be secured by an
unloaded straining wire.
Warning
Make sure that the plastic pipes to be used are
suitable for the actual liquid temperature and the
pump pressure.
When connecting plastic pipes, a compression coupling should
be used between the pump and the first pipe section.

5. Electrical connection

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

5.1 General

The electrical connection should be carried out by an authorised
electrician in accordance with local regulations.
The supply voltage, rated maximum current and cos ϕ appear
from the loose data plate that must be fitted close to the
installation site.
Installation
Vertical Horizontal
40 °C 40 °C
(~ 105 °F) (~ 105 °F)
60 °C 60 °C
(~ 140 °F) (~ 140 °F)
Flow sleeve Flow sleeve
recommended recommended
30 °C 30 °C
(~ 86 °F) (~ 86 °F)
60 °C 60 °C
(~ 140 °F) (~ 140 °F)
25 °C 25 °C
(~ 77 °F) (~ 77 °F)
30 °C 30 °C
(~ 86 °F) (~ 86 °F)
30 °C 30 °C
(~85 °F) (~85 °F)
30 °C 30 °C
(~85 °F) (~85 °F)
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