Frequency Of Starts And Stops; Operating The Product - Grundfos CR Serie Instrucciones De Instalación Y Funcionamiento

The seal faces are lubricated by the pumped liquid,
meaning that there may be a certain amount of
leakage from the shaft seal.
When you start the pump for the first time, or when
you install a new shaft seal, a certain run-in period is
required before the leakage is reduced to an
acceptable level. The time required for this depends
on the operating conditions, that is every time the
operating conditions change, a new run-in period will
be started.
Under normal conditions, the leaking liquid will
evaporate. As a result, no leakage will be detected.

4.2 Frequency of starts and stops

Motor size Maximum number of starts per
[kW]
0.37 - 2.2
3-4
5.5 - 11
18.5 - 22
30
37
45
55
75

4.3 Operating the product

For operating the product safely, observe the
following hazard statements:
WARNING
Contamination when pumping drinking
water
Death or serious personal injury
- Do not use the pump for drinking water
if the internal parts have been in contact
with particles or substances not suitable
for water intended for human
consumption.
WARNING
Airborne noise
Death or serious personal injury
- Wear personal protective equipment.
See fig. 4 in the appendix.
WARNING
Too high pressure and leakage
Death or serious personal injury
- Do not run the pump against a closed
outlet valve.
hour
250
100
50
40
90
50
80
50
50
CAUTION
Hot or cold surface
Minor or moderate personal injury
- Make sure that no one can accidentally
come into contact with hot or cold
surfaces.
Hot or cold surfaces
CAUTION
Hot or cold liquid
Minor or moderate personal injury
- Wear personal protective equipment.
Figure 17 shows which pump parts get as hot or cold
as the pumped liquid.
Pump head
Pump sleeve
Base
Fig. 17 Hot or cold surfaces on a CR, CRI and
CRN pump
For motor bearing maintenance at ambient
temperatures above 40 °C, see section
10. Disposing of the product.
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