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10. THE HUMIDIFIER CONTROLLER
Two types of electronic controller are available for the electrical heater humidifier (see REGULATION PRINCIPLES):
Type C control module, with indication LEDs and ON/OFF action
This control provides regulation of the steam production capacity and ON/OFF regulation.
Type H or T control module, with numeric LED display and modulating action
This control provides complete regulation of the steam production capacity, with optional dehumidification function; it
accepts signals from humidity probes or from proportional (or ON/OFF) external electronic devices.
10.1 Type C control module, with indication LEDs and ON/OFF action
10.1.1 Front panel
6
7
9
4
8
5
Fig. 10.1.1.1
The ON/OFF version allows the display and modification only of the steam production parameter.
The other functional parameters are factory set and can not be modified by the user (they can however be accessed via
serial line).
10.1.2 Start-up sequence
On starting-up the humidifier, the start-up sequence occurs, signalled by the illumination of the LEDs, as described below.
1 - POWER ON
In this phase, lasting around a
second, all the LEDs on the
display are illuminated.
Fig. 10.1.2.1
10.1.3 Display and control
Normally the panel shows the set steam production capacity, using the 4-stage bar graph (30%; 50%; 75%; 100%).
To change the set value press the
10.1.4 Alarm indications
The illumination of LED 9 (see Fig. 10.1.1.1) and a combination of the LEDs 5 indicates the presence of a current alarm state;
in the event of more than one alarms, the LEDs 5 are illuminated in sequence, at 2 second intervals.
At the same time, the control module activates the alarm relay (see ELECTRICAL CONNECTIONS).
To interpret the type of alarm, see ALARMS AND TROUBLESHOOTING.
The control module continues to indicate the alarm state (even if this is no longer active) until the reset button is pressed; still
active alarms can not be reset.
Carel code +030221761
1
2
3
2 - INITIALISATION
Duration around 4 seconds. The LEDs
highlighted here are all illuminated on
the display of the control module.
Fig. 10.1.2.2
and
buttons. The change to the set production is stored permanently.
n.
description
1
reset button for the alarm relay (if the alarm is no longer active)
2
increase programmed steam production button
decrease programmed steam production button
3
4
set steam production bar graph (percentage)
5
bar graph indicating any active alarms
6
LED indicating current steam production
7
LED indicating operation of drain electrovalve
8
LED indicating operation of the fill electrovalve
9
flashing LED indicating alarm relay activated
The humidifier, if enabled performs the autotest, and thus
begins operation; the control module indicates, on the four-
stage bar graph (30%; 50%; 75%; 100%), the set steam
production and, in the event of an alarm, the number on the
relative bar code.
30
preliminary version - rel. 2.0 - 03/09/99
heaterSteam
Tab. 10.1.1.1
3 - OPERATION
Fig. 10.1.2.3
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