Carel humiSteam UE005 - Automatic Insufficient Supply Water Management; Alarm Relay Switching; Auxiliary Contact Management (Active Fan Request); Manual Procedure

40
“UE BASIC” +08C0042EZ - rel. 1.0 - 16.10.2017
ENG
Drain due to excess foam
With certain types of supply water, foam may form during the production
of steam just above the water. This situation must be resolved, as it may
cause water to be released together with the steam. For this purpose, two
electrodes are tted on the top of the cylinder. When these electrodes
detect the presence of foam, the humidier activates a series of repeated
drain cycles. If the situation persists, the complete washing of the cylinder
is activated.
Drain due to inactivity
In humidier does not operate for an extended time (it remains on
but does not produce steam), the water in the cylinder is drained
automatically, to avoid stagnation and hygiene risks. The inactivity time is
set using parameter “bF” (default 3 days). The function can be disabled by
setting parameter b1 ( see paragraph 11.6).
Powered draining
When running an automatic drain cycle due to excessive salt, the
electrodes are not powered and the production of steam is thus reduced.
To keep the electrodes powered during the drain cycle set parameter b1
(see paragraph 11.6).
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.
Set parameter b1 ( see paragraph 11.6)
Periodical drain
When using water rich in substances such as humus and lime, a periodical
drain cycle should be set for the cylinder to avoid accumulating residues.
To enable the periodical drain, set parameter b1 to 64. In this way, every
24 h the humidier will drain all the stagnant water in the cylinder, and
the display will show code “dP” (periodical drain). If the periodical drain is
enabled, the number of hours between two periodical drain cycles can
be set using parameter “bE”.
Note: For the manual drain function, see chap. 6, for the mechanical
drain see paragraph 9.4.
12.5 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 controlling if the current at the electrodes
increases after opening the ll solenoid valve.
In this case, the humidier:
• displays alarm “EF”
• 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.
Nota: the alarm is reset automatically and is managed according to
the procedure described above.
12.6 12.6 Alarm relay switching
Once the operating hours corresponding to the cylinder maintenance
request have been reached (“CY” alarms), the alarm relay (if there are
no other alarms active) will switch for 10 seconds every 12 hours, until
reaching the “Mn” alarm. This function is activated using parameter b1
(see paragraph 11.6); normally disabled.
12.7 Auxiliary contact management (active
fan request)
The auxiliary contact can be used to:
• remote signalling of steam production request (but not the actual value);
• activation/deactivation of an external fan unit, based on whether the
steam production request is present.
Activating this function by parameter b1, the contact is activated
(CLOSED) during steam production, with a delay of A6 seconds, and
deactivated (OPEN) with a delay of A7 seconds.
During A6 and A7 the symbol (fan) will ash on the display, during
activation the symbol (fan) will be on steady.
During the manual drain (see Chap. 6.12) the contact will be deactivated
(always after the delay A7).
During pre-wash (see Chap. 6.1) the contact be activated, with the
corresponding delays.
12.8 Manual procedure
This procedure is used to manually control the devices on the humidier.
From the main screen, press the PRG button for 2 seconds.
Enter the password 70 using UP or DOWN.
The display will show MAn
Press PRG.
The display will show tlr
Then scroll the various devices using UP and DOWN:
- tlr = Contactor
- drn = Drain pump
- FiL = Fill SV
- drt = Drain tempering SV ( not used )
- ALr = Alarm relay
- FAn = Auxiliary contact (fan)
Pressing PRG from any these options shows:
ON if the device is currently active
OFF if the device is currently inactive
Press PRG; the display starts ashing
Press UP or DOWN to modify the value
Press PRG to conrm.
Press ESC to return to the previous display.
N.B. THE MODE CAN ONLY BE EXITED USING THE ESC BUTTON FROM THE
MAn DISPLAY OR BY SWITCHING OFF THE HUMIDIFIER.
12.9 LEDs on the control board
There are three LEDs tted on the expansion board, located above the
control board:
Fig. 12.d
Key:
LED on
board
Symbol on
display
Meaning
Red
alarm in progress (the type of alarm can be identied
based on the type of ashing, see chap. 8)
Yellow
steam production in progress (led always on for
100% production, 2 blinkng 20%, 3 blinking 30%, ...)
Green
humidier on
Tab. 12.a
NOTE: The yellow and red LEDs are active only if the display is
disconnected.