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Raychem-AR-H58692-ACS30UIT2Programming-EN-1805
Override Manual:
This feature provides an additional override capability for the circuit.
Range:
0–10 hours
Default:
0 hours
Hrs:
On or off
Power Off Delay:
Continue to power the circuit when the external control devices contacts open.
Range: 0–10 hours
Default: 0 hours
Fail Safe:
The Fail Safe control button turns the power on or off to the heating cable if the circuit
loses all valid RTDs. When the last remaining sensor for control fails (or communication with the
sensor is lost), the ACS-UIT2:
•
Signals an alarm for the failure of the sensor
•
Changes control of the circuit to the fail safe control selected
•
Changes the control status display to indicate that control of the circuit is in the fail safe state
•
Records the events
When the sensor for control is returned to service, the ACS-30 controller signals the alarm has been
cleared, returns the circuit to its normal control mode, and records both of these events.
Range:
Power On or Power Off
Default:
Power On
ASSIGNING RTDS
After the control mode and parameters are set, tap Setup|RTDs window to assign RTDs to the
circuit.
When in ambient control mode you have the option of setting up to four inputs through any RTD
inputs in your system. You must have a least one RTD assigned for Ambient Control, the remaining
RTD positions are optional and may be used for either ambient control or High Temperature
Override. For detailed information on the RTD window refer 2.2.3 Assigning and Sharing RTD Control
and Monitoring on page 30.
Fig. 3.80
Setup|RTDs window (Roof & Gutter - Ambient Temp Control)
