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Raychem-AR-H58692-ACS30UIT2Programming-EN-1805
ASSIGNING TEMPERATURE ALARMS
Once RTDs have been assigned to the circuit the alarm button appears then high and low
temperature alarms may be set.
Fig. 3.20
Setup|Alarms window (Floor Heating)
High Line Temp Alarm:
If any RTDs assigned to a circuit measures a temperature above this
threshold, the ACS-UIT2 generates an alarm. The limit can be set for any temperature value you
desire for your application within the range allowed.
Range:
Maintain setpoint plus 10°F (6°C) to 140°F (60ºC)
Default:
140°F (60°C)
Low Line Temp Alarm:
If any RTDs assigned to a circuit measures a temperature below this
threshold, the ACS-UIT2 generates an alarm.
Range:
40ºF (4ºC)–60°F (16°C)
Default:
40°F (4°C)
Note:
One RTD must be connected to the circuit for this control mode to function or an RTD failure
alarm will be announced.
Temperature Alarm Filter:
This minimizes nuisance alarms by forcing the ACS-UIT2 to verify that
the alarm condition continually exists over the selected period of time before alarming.
Range:
0–999 minutes
Default:
15 minutes
Note:
Setting the Alarm Filter to 0 minutes is mainly for testing and demonstration purposes.
Choosing this option for normal use may cause nuisance alarming since this option may not allow
the ACS-UIT2 time to verify that the alarm conditions exist.
High Line Temp Cut-Out:
If any RTDs assigned to a circuit measures a temperature above this
threshold, the ACS-UIT2 generates an alarm and the relay output is turned off. If the high line
temperature drops below this threshold minus the deadband, the output is turned on and normal
duty cycle control is resumed.
Range:
Maintain setpoint plus 10°F (6°C) to 150ºF (65ºC)
Default:
150°F (65ºC)
