Operating instructions
Design NAN.. and NHN..
•
Align the coupling again after pump has reached normal operating temperature and system
pressure (if applicable), check once again and if necessary adjust. Read Point 4.5 „Starting up“
first.
•
It must be possible to turn the unit by hand smoothly and easily.
•
Mount coupling guard as shown in drawing no. 6396-312 (appendix).
The installation and alignment of the coupling must be carried out with the utmost
care and attention, and the motor will then run more reliably and last longer. Badly
aligned couplings cause noise, vibration and increased wear on bearings, couplings
and shaft seals.
4.3 Connecting the pipes to the pump
Suction and discharge pipe
•
The pipes must be of a size and design that liquid can flow freely into the pump and that the
pump functions without problems. Particular attention is to be paid to ensuring that suction pipes
are airtight and that the NPSH values are observed. Lay the suction pipe in the horizontal section
towards the pump so that it is slightly inclined upwards so that no air pockets occur. In most
cases, it is recommended that a non-return valve is installed in the discharge pipe shortly after
the pump.
•
When laying the pipes, make sure that the pump is accessible for maintenance and installation.
•
Please note 1.4: „Permitted Forces on Flanges“.
Please
note
Pa 100/3-en
12
