User manual

56
ENG
“UEX-PLUS” +03U220621 - rel. 1.4 - 04.08.2009
installeruserservice
CAREL reserves the right to modify or change its products without prior notice.
Draining due to a signicant reduction in the request for
production
In the event of a signicant reduction in the request for steam production, the
humidier, rather than wait for the level of water (and thus the production)
to decrease due to the eect of the production itself, performs a drain cycle.
The reduction in the request for steam production is considered signicant
if the current is 33% higher than that relating to the requested level. This
function can be disabled: installer menu > drain options > drain if steam
request drops.
Periodical drain
When using water rich in substances such as humus, lime and impurities,
the eciency and the operation of the humidier may be aected. In
these cases, a periodical drain cycle should be set for the cylinder top avoid
accumulating residues.
To enable the periodical drain: installer menu > drain options > periodic
cylinder ush
To set the drain interval: installer menu > drain options > time interval
14.6 Automatic insucient supply water
management
The humidier checks whether there is no supply water or the ow-rate
of supply water is too low, by measuring if the current at the electrodes
increases after opening the ll solenoid valve.
In this case, the humidier:
• activatesthealarmrelay,
• opensthecontactorandclosesthellsolenoidvalvefor10minutes
After the 10 minutes, the ll solenoid valve is opened, the contactor closed
and the phase current measured: if it increases the alarm is deactivated,
otherwise the procedure is repeated.
NOTE: the alarm is reset automatically and is managed according to the
procedure described above.
14.7 Cylinder “exhaustion” and cylinder “
pre-exhaustion” alarms
To disable the “cylinder exhaustion” alarm: installer menu > options > cylinder
pre-exhaustion alarm
To set “cylinder exhaustion warning” (maximum operating hours): installer
menu > options > cylinder lifetime warning (setting “0” disables the alarm).