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Blow-down
(contd.)
2-2
Correction full
blowdown
see correction partial blow-down
2-3
Switch stand-
by blow-down
Should steam humidifier operation be prospectively
halted for a longer period of time, blowing-down the cyl-
inder water is advisable in order to comply with the VDI
6022 hygiene regulations prescribing the prevention of
microbial contamination of residual water. Parameter 2-
3 is the switch to activate and de-activate the stand-by
blow-down function. When activated, a full blow-down is
run after a waiting time that was determined by setting
parameter 2-4 to the value in question. For stand-by
blow-down to become effective, the unit control switch
must remain in the „On“- postion („I“).
2-4
Waiting time
stand-by
blow-down
Determines the waiting time until the cylinder water is
fully drained to counteract contamination when no steam
is produced for a lengthy period of time (factory setting is
24 hours).
2-5 Switch
dead
leg flushing
When parameter 2-5 = „1“, for flushing of the supply line,
solenoid valve and blow-down pump are simultanously
activated after the time preset in parameter 2-6 and for
the duration of time preset in 2-7. In order for this to
work, the safety interlock must be closed.
2-6
Interval dead
leg flushing
Waiting time [h] when there is no steam production until
dead leg flushing is acivated; only valid if switch 2-5 =
„1“.
2-7
Duration dead
leg flushing
Duration of dead leg flushing [s].
2-8
Blow-down
without main
contactor K1
(only for elec-
trode steam
humidifiers)
This setting could be useful if the power supply line is
routed through a sensitive residual-current circuit
breaker.During blow-down, leakage currents may flow
towards ground through cylinder water. In order to avoid
the activation of the leakage sensor circuitbreaker, the
main contactor K1 may be switched off during pumping
(2-8 = „1“ is designated to „main contactor is switched off
during pumping“).
2-9
Steam-down
time
This parameter serves for monitoring proper unit func-
tioning.This setting could be useful if the power supply
line is routed through a sensitive residual-current circuit
breaker. When steam production is called-for by the con-
trol software, a cylinder filling variation must be detect-
able within the timespan defined by „2-9“. Should this not
be registrated, the unit enters error state „123“ (error
steam-down time) and cuts steam production.
Group
Par.
Denomina-
tion
Description
