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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.
Motor
Flow past
the motor
Grundfos
MS 402
0.15 m/s
MS 4000
MS 6000
Grundfos
0,15 m/s
MS 4000I*
Grundfos
1.00 m/s
MS 6000I*
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).
37 kW MMS 6, 110 kW MMS 8000 and 170 kW
MMS 10000: The maximum operational liquid
temperature is 5 °C lower than the values stated
Note
in the above table.
190 kW MMS 10000: The temperature is 10 °C
lower.
5.5 Pipe connection
If noise may be transmitted to the building through the pipework,
we recommend that you use plastic pipes.
We recommend plastic pipes for 4" pumps only.
Note
When using plastic pipes, secure the pump by an unloaded
straining wire.
Warning
Make sure that the plastic pipes are suitable for
the actual liquid temperature and the pump
pressure.
When connecting plastic pipes, use a compression coupling
between the pump and the first pipe section.
6. Electrical connection
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.
6
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
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)
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.
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.
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
Colours of the leads
Lead
Flat cable
1 = L1
Brown
2 = L2
Black
3 = L3
Grey
4 = PE
Yellow/green
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.
Single leads
Black
Yellow
Red
Green
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