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6.2 Operation of electrode steam
humidifier with softened
water
Do not use softened water unless special
measures are taken!
Operation with partially or fully softened
water makes it necessary to adjust the blow-
down parameters to a higher blowdown fre-
quency.
Even if the HygroMatik steam humidifier is
supplied with partially softened water, the
remaining hardness builders can cause fine
crystalline deposits. These can be set down
in the sieve area of the steam cylinder bottom
part and cause blocking of the sieve.
The following applies to electrode steam
humidifiers (ELDB):
Softened water may cause
•
unacceptably high conducivity
•
the formation of salt bridges
between the electrodes and the
electrode leads on the inner surface
of the steam cylinder upper part
•
foaming in the steam cylinder
Salt bridges may cause electrical arcs. These
are indicated by the presence of black
grooves in the top part of the cylinder. The
cylinder must then be replaced to prevent fur-
ther damage to the cylinder material, as well
as short circuits which may trip main circuit
breaker.
Foam may come into contact with the maxi-
mum level sensor electrode and trigger the
max. level status message despite the cylin-
der not being full yet and the nominal current
not yet established.
With softened water, at operating tempera-
ture conductivity level usually is higher than
is the case with tap water.
If using a water softening system, we
recommend diluting the softened water with
normal tap water to produce an overall
hardness between 4-8°gH
.
The following applies to heater steam
humidifiers (HKDB):
•
Operation with fully softened water
(0°dH) is possible
6.3 Water supply
Foreign material in water supply pipe may
cause premature wear of the solenoid
valve.
Flush the water supply pipe before making
connection to the solenoid valve. This is of
particular importance in case of a newly
installed pipe.
»
Install a shut-off valve (SV) in the
supply line.
»
Install a water filter (WF) if required
due to bad water quality.
•
Shut-off valve (SV) and water filter
(WF) are not included in the delivery
•
For connection to the water supply line,
the water hose (56) with cap nuts (1) on
both ends supplied with the unit may be
used.
•
In case of no safety device for drinking
water protection according to DIN EN
1717 present in the house installation
system, a system separator at least of
the CA type or use of the Hyflow retrofit
option (only for electrode steam humi-
difiers) is mandatory.
NOTICE
NOTICE
Please note
