Pump Curve Data (4.3 - Grundfos CONTROL MPC Installation And Operating Instructions Manual

11.7.37 Pump curve data (4.3.19)

Fig. 78 Pump curve data
Description
The CU 351 has a number of functions using these pump data:
• Nominal flow rate, Q , in m
nom
• Nominal head, H , in metres
nom
• Max. head, H , in metres
max
• Max. flow rate, Q in m
max,
• Power, Q , 100 %, speed in kW
0
• Power, Q , 50 % speed, in kW
0
• Nominal power, P , in kW.
nom
Grundfos can supply hydraulic data for CR, CRI,
CRE and CRIE pumps where GSC files can be
downloaded directly to the CU 351.
Note
All other pump types require manual entering of
hydraulic pump data.
The electrical data, "Power, Q
"Power, Q , 50 % speed" must be entered
0
manually for all pump types, including CR, CRI,
Note
CRE and CRIE.
For Grundfos E-pumps, the data of input power
(P1) must be entered.
The data are read by means of the pump performance curves
which can be found in WebCAPS on Grundfos' homepage,
www.grundfos.com. See examples in figs 79 to 82.
If WebCAPS is not accessible, try to bring a pump into the three
duty points: Power, Q , 100 % speed, Power, Q
0
Nominal power, Pnom. Read the power values in displays 1.3 to
1.8, depending on the pump. See section 11.4.8 Pump 1...6 (1.3
to 1.8).
H
max
H
nom
Fig. 79 Reading of Q
nom
46
3
/h
3
/h
, 100 % speed" and
0
, 50 % speed and
0
Nominal duty point
Q Q
nom
, H , H and Q (WebCAPS)
nom max max
a
Duty point, Q0,
100 % speed
Fig. 80 Reading of Power, Q0, 100 % speed (WebCAPS)
Duty point, Q0, 50 % speed
Fig. 81 Reading of Power, Q0, 50 % speed (WebCAPS)
Fig. 82 Reading of Nominal power, P
max
Q
pumps and usually the duty point with the
Note
highest efficiency.
Power, Q0, 100 % speed
Power, Q0, 50 % speed
Duty point, Nominal
power, P
nom
Nominal power, P
nom
and H are the rated duty point of the
nom nom
nom
(WebCAPS)