KEB COMBIVERT F6 Instructions For Use Manual - Attention
c.1.4 Special requirements for open and half-open cooling systems:
Problem
Solution
Impurities
Mechanical impurities in half-open cooling systems can be counteracted when ap-
propriatewaterfiltersareused.
Salt concentration
The salt content can increase through evaporation at half-open systems. Thus the
water is more corrosive. Adding of fresh water and removing of process water
works against.
Algae and myxobac-
teria
Algae and myxobacteria can arise caused by increased water temperature and
contactwithatmosphericoxygen.Thealgaeandmyxobacteriaclogthefiltersand
obstructthewater-flow.Biocidecontainingadditivescanavoidthis.Especiallyat
longer OFF periods of the cooling circuit preventive maintenance is necessary.
Organic materials
The contamination with organic materials must be kept as small as possible, be-
cause separate slime can be caused by this.
Table 8:
Special requirements for open and half-open cooling systems:
ATTENTION
Damages at the unit
►
Damages at the unit which are caused by clogged, corroded liquid
heat sinks
or other obvious operating errors, leads to the loss of the
warranty claims.
c.1.5 Coolant flow temperature
Thecoolantflowtemperatureisdependingontheunitsizeandisspecifiedinthe
technical data.
Flow temperature
Theflowtemperatureshouldbeselecteddependingonthevolumeflowby
way that the heat sink temperature at rated operation is always 10 K below
the overtemperature level. This avoids sporadic shutdown.
c.1.6 Moisture condensation
Due to high air humidity and high temperatures it can lead to moisture condensation.
Moisture condensation is dangerous for the drive converter, because the drive converter
can be destroyed by any occuring short-circuits.
ATTENTION
Moisture condensation
► The user must ensure that any moisture condensation is avoided!
73
ANNex - cOOLING SySTeM