Minimum Flow Rate; Electrical Data; Dimensions And Weights; Disposing Of The Product - Grundfos CR Serie Instrucciones De Instalación Y Funcionamiento

Example
Pb = 1 bar.
Pump type: CR 15, 50 Hz.
3
Flow rate: 15 m /h.
NPSH (see the appendix): 1.1 m head.
Hf = 3.0 m head.
Liquid temperature: 60 °C.
Hv (from fig. 5 in the appendix): 2.1 m head.
H = Pb x 10.2 - NPSH - Hf - Hv - Hs [m head].
H = 1 x 10.2 - 1.1 - 3.0 - 2.1 - 0.5 = 3.5 m head.
This means that the pump can operate at a suction
lift of maximum 3.5 m head.
Pressure calculated in bar: 3.5 x 0.0981 = 0.343 bar.
Pressure calculated in kPa: 3.5 x 9.81 = 34.3 kPa.
9.1.5 Maximum permissible inlet pressure
The tables in the appendix state the maximum
permissible inlet pressure. However, the actual inlet
pressure + the maximum pump pressure at no flow
must always be lower than the values stated in fig.
in the appendix.
The pumps are pressure-tested at a pressure of 1.5
times the values stated in fig.

9.1.6 Minimum flow rate

WARNING
Too high pressure and leakage
Death or serious personal injury
- Do not run the pump against a closed
outlet valve.
Due to the risk of overheating, do not use the pump
at flows below the minimum flow rate.
The curves below show the minimum flow rate as a
percentage of the rated flow rate in relation to the
liquid temperature.
- - - - = air-cooled top.
Qmin
[%]
30
20
10
0
40 60 80 100 120 140 160 180
Fig. 22 Minimum flow rate
1
1 in the appendix.
t [°C]

9.2 Electrical data

See the motor nameplate.

9.3 Dimensions and weights

Dimensions: See fig. 3 in the appendix.
Weights: See label on the packing.
9.3.1 Sound pressure level
See fig. 4 in the appendix.

10. Disposing of the product

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
The crossed-out wheelie bin symbol on
a product means that it must be
disposed of separately from household
waste. When a product marked with this
symbol reaches its end of life, take it to a
collection point designated by the local
waste disposal authorities. The separate collection
and recycling of such products will help protect the
environment and human health.
See also end-of-life information at
www.grundfos.com/product-recycling.
23