IV Produkt Control Unit IVC3
IVC3 Basic Manual 2004-12-15.doc
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3.7 AUX-input
The AUX-input is configurable as A-alarm, B-alarm or stop.
Alarm is set by a closing external contact.
Stop (emergency stop) activates at closed contact
Setup
Setting
Description
Config. AUX
Alarm A
Alarm B
Stop
AUX sets an A-alarm and unit stops.
AUX sets an B-alarm, unit operates as usual.
Emergency stop, unit stops, no overrun time of fans.
Delay AUX
0-60 min
Delay before an A or B-alarm is set up.
Not used at emergency stop.
Result:
A-alarm: Unit stops.
B-alarm: Unit operates as usual.
Emergency stop: Unit stops, no overrun time of fans. No alarm is set up.
3.8 Temperature deviation alarm (Alarm temp. fail)
If supply air temperature constantly deviates from setpoint more than set limit during 30 minutes a B-
alarm is set up. If supply air temperature would deviate another 5° an A-alarm is set up and the unit
stops.
On a rise in supply air temperature a deviation would only result in a B-alarm and unit operates as
usual.
No alarm would be set up at a unit without cooler if outdoor temperature e20°C.
Settings
Setting
Description
Alarm temp.
fail
0-60
°
C
Deviation limit from setpoint for supply air temperature, a B-
alarm is set up after more than 30 minutes deviation.
An A-alarm is set up and unit stops if temperature drops
more than 5° below low limit.
4. Time schedule
At Fan mode set to Auto the unit operates according to settings in time schedule at the Clock menu.
Time schedule sets from operating terminal.
Four events (time and mode) a day can be set.
The times can be set to hours or half-hours. At each set time an operating mode (stop, normal or
forced) is to be set, unit runs on set mode until a new mode appears in time schedule..
Time schedule can be configured for individual day settings or groups (workdays and weekend).
Four different time events are to be set for each day (1-7) when configured as individual day.
Four different time events are to be set for workdays (1-5) and four events for weekend (6-7) when
configured as groups.
IVC3 is equipped with a real time clock for weekdays, hours and minutes.
The real time clock has power back-up.
