English (GB)
6
5.4.1 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 table below.
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.
5.5 Pipe connection
If noise may be transmitted to the building through the pipework,
we recommend that you use plastic pipes.
When using plastic pipes, secure the pump by an unloaded
straining wire.
When connecting plastic pipes, use a compression coupling
between the pump and the first pipe section.
6. Electrical connection
The supply voltage, rated maximum current and cos φ appear
from the loose data plate which must be fitted close to the
installation site.
The required voltage quality for MS and MMS motors, measured
at the motor terminals, is - 10 %/+ 6 % of the nominal voltage
during continuous operation (including variation in the supply
voltage and losses in cables).
Check also that there is voltage symmetry in the power supply
lines, i.e. same difference of voltage between the individual
phases. See section 11. Checking motor and cable, item 2.
If MS motors with a built-in temperature transmitter (Tempcon)
are not installed together with a MP 204 or similar Grundfos
motor protection, they must be connected to a 0.47 μF capacitor
approved for phase-phase operation (IEC 384-14) to meet the EC
EMC directive (2004/108/EC). The capacitor must be connected
to the two phases to which the temperature transmitter is
connected. See fig. 9.
Fig. 9 Connection of capacitor
The motors are wound for direct-on-line starting or star-delta
starting, and the starting current is between four and six times the
rated current of the motor.
The run-up time of the pump is only about 0.1 second.
Direct-on-line starting is therefore normally approved by the
power supply company.
Motor
Installation
Flow past
the motor
Vertical Horizontal
Grundfos
MS 402
MS 4000
MS 6000
0.15 m/s
40 °C
(~ 105 °F)
40 °C
(~ 105 °F)
Grundfos
MS 4000I*
0,15 m/s
60 °C
(~ 140 °F)
Flow sleeve
recommended
60 °C
(~ 140 °F)
Flow sleeve
recommended
Grundfos
MS 6000I*
1.00 m/s
Grundfos
MMS
0.15 m/s
25 °C
(~ 77 °F)
25 °C
(~ 77 °F)
0.50 m/s
30 °C
(~ 86 °F)
30 °C
(~ 86 °F)
Franklin
4"
0.08 m/s
30 °C
(~ 85 °F)
30 °C
(~ 85 °F)
Franklin
6" and 8"
0.16 m/s
30 °C
(~ 85 °F)
30 °C
(~ 85 °F)
* At an ambient pressure of minimum 1 bar (1 MPa).
We recommend plastic pipes for 4" pumps only.
Warning
Make sure that the plastic pipes are suitable for the
actual liquid temperature and the pump pressure.
Warning
During electrical installation, make sure that the
power supply cannot be accidentally switched on.
Warning
The electrical installation should be carried out by an
authorised person in accordance with local
regulations.
Warning
The pump must be earthed.
The pump must be connected to an external mains
switch with a minimum contact gap of
3 mm in all poles.
TM00 7100 0696
Colours of the leads
Lead Flat cable Single leads
1 = L1 Brown Black
2 = L2 Black Yellow
3 = L3 Grey Red
4 = PE Yellow/green Green
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