Use; Proper Use; Improper Use - KNF N680 EX Manual

Use

Operating parameters and
Requirements on the transferred
Variable frequency drive Pumps with three-phase motor are designed for operation with a variable
6 Translation of Original Operation and Installation Instruction, english, KNF 325438 02/22
2 Use

2.1 Proper use

The pumps are intended exclusively for transferring gases and vapors.
Responsibility of the owner
Only install and operate the pumps in accordance with the operating pa-
conditions rameters and conditions described in Chapter 4 Technical dataand Chap-
ter 2.3 Use in potentially explosive areas.
Pumps with ATEX designation do not always satisfy the regulations
for potentially explosive areas in countries outside of the EU.
Only pumps that are fully assembled and in the condition as delivered may
be operated.
Make sure that the installation location is dry and that the pump is pro-
tected against rain, splash, gushing, and drip water as well as from other
contaminants.
The pump is suitable for transferring potentially explosive atmospheres
and for operation in potentially explosive atmospheres.
Check the tightness of the connections between the pipes of the applica-
tion and the pump (or the connection of the pump) at regular intervals.
Leaky connections carry the risk of releasing dangerous gases and vapors
from the pump system.
Before transferring a medium, check whether the medium can be trans-
medium ferred danger-free in the specific application.
Before using a medium, check the compatibility of the media-contacting
components (see 4 Technical data) with the medium.
Risk of dangerous gas mixtures during pump operation if diaphragm
breaks: Depending on the medium being transferred, breakage of the di-
aphragm can result in a dangerous mixture if the medium mixes with the
air in the compressor housing or the surroundings.
Make certain that no risk of explosion arises even in extreme operating sit-
uations (temperature, pressure) and in the event of system breakdowns.
Only transfer gases that remain stable under the pressures and tempera-
tures that arise in the pump.
frequency drive in the speed range 500 – 1500 rpm (50 Hz) or 600 – 1800
rpm (60 Hz) (see also Chapter Electrical connection).

2.2 Improper use

The pumps are not suitable for use below ground.
The pumps are not suitable for delivering:
§
Dusts
§
Fluids
§
Aerosols
§
Biological and microbiological substances
§
Explosives
§
Fibers
§
Foodstuffs.
Pumps that can produce both vacuum as well as overpressure may not be
used to simultaneously produce vacuum and overpressure.
Diaphragm pump N680 EX