Starting Up The Product; General Information; Prestart Checks - Grundfos LSV Serie Montage- Und Betriebsanleitung

3.5.6 Installations with vertical inlet pipe in
confined space
Fig. 19 Inlet diffuser (1) in the inlet pipe

4. Starting up the product

4.1 General information

Do not start the pump until it has been
filled with liquid and vented.
CAUTION
Biological hazard
Minor or moderate personal injury
- When pumping drinking water, the pump
must be flushed thoroughly with clean
water before startup in order to remove
any foreign matters, such as
preservatives, test liquid or grease.
4.1.1 Pumps with stuffing box
In case of pumps with stuffing box, check that the
stuffing box gland is correctly fitted. It must be
possible to turn the pump shaft manually. If the pump
has been inactive for a long period, turn it manually
to make sure it has not got stuck. Loosen the stuffing
box or remove the packing.
4.1.2 Flushing the pipe system
The pump is not designed to pump liquids
containing solid particles such as pipe
debris and welding slag. Before starting up
the pump, the pipe system must be
thoroughly cleaned, flushed and filled with
clean water.
1
The warranty does not cover any damage
caused by flushing the pipe system by
means of the pump.
The startup procedure for the pumps has four steps:
1. Prestart checks. See section
2. Priming. See section
3. Starting. See section
4. Final alignment. See section
Only start the pump when you have gone
through all of the prestart checks.

4.2 Prestart checks

Prestart checks have four steps:
1. bearings
2. stuffing boxes
3. pressure gauge
4. direction of rotation.
4.2.1 Bearings
Make sure that all bearings are properly lubricated.
See section
6.3.3
4.2.2 Stuffing boxes
Make sure that the stuffing box packing rings have
been properly tightened.
This does not apply to pumps with
mechanical shaft seals.
4.2.3 Pressure gauges
Make sure that the pressure gauge connections are
closed.
4.2 Prestart
4.3 Priming.
4.4 Startup.
4.5 Alignment.
Lubrication.
checks.
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