Installing The Product; Pump With Single Seal; Pump With Magdrive - Grundfos CR Serie Instrucciones De Instalación Y Funcionamiento

7. Installing the product

DANGER
Explosion risk
Death or serious personal injury
- Do not let the pump run dry.
- Make sure that the pump is filled with
pumped liquid during operation.
DANGER
Explosion risk
Death or serious personal injury
- Replace the shaft seal if increased
leakage is observed.
DANGER
Explosion risk
Death or serious personal injury
- Always install the pump with the motor
above the pump to avoid overheating of
the motor bearings. See fig. 2.
The responsibility for checking the
functions of the dry-running protection,
such as flow rate, sealing pressure and
temperature of the barrier or flushing
liquid, rests with the installer or owner.
Fig. 2 Positioning the pump

7.1 Pump with single seal

7.1.1 Non-flammable liquids
Category 2G/D/M2
Make sure that the pump is filled with pumped liquid
during operation. If this is not possible, ensure
appropriate monitoring, for example dry-running
protection to stop the pump in case of malfunction.
Category 3G/D
No additional monitoring, for example dry-running
protection, is required for the pump system.
7.1.2 Flammable liquids, pump unit
Category 2G/D/M2 and 3G/D/M2
Make sure that the pump is filled with pumped liquid
during operation. If this is not possible, ensure
appropriate monitoring, for example dry-running
protection to stop the pump in case of malfunction.
Ensure sufficient ventilation around the pump.
The leakage rate of a shaft seal is 1-10 ml for each
24 hours of operation. For some types of liquids, the
leakage will not be visible due to evaporation. During
the run-in period, larger leakage of 1-20 ml per 24
hours of operation can occur. Liquids like oil or
glycol-water mixtures evaporate slower than water
and will leave residuals. Ensure proper ventilation to
maintain the zone classification.
Category M2
Protect the pump with a guard to prevent damage
from falling or ejected objects.

7.2 Pump with MAGdrive

DANGER
Explosion risk
Death or serious personal injury
- Always fill the pump with liquid and
ensure that the required minimum flow
rate is obtained.
See the CRN MAGdrive installation and operating
instructions at http://net.grundfos.com/qr/i/
96464310.
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