GE FHSD720C Installation And User Manual page 31

GE Security FHSD700C Series Product Guide
NIGHSTART, NIGHSTOP
The time in hours, on a 24 hour basis, at which the values change from day to night or back again. The
default value for both is 12, at this value only the day values are applicable.
TRC PRESS (FHSD7215DC only)
Trace Pressure is used as a figure to initiate the valve into a scan routine when the required change in
airflow is detected. This figure is set by monitoring the REL in value with the Rotary valve monitoring
flow in the overall position. This value must be left at the default value of '25' for EN54-20 compliance.
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