NFS-640 Programming Manual P/N 51333:B 10/03/2003 101
Appendix E: Detector Initialization
Overview
The control panel automatically performs a detector initialization routine when you add or change a
detector, unless the control panel is in Walk Test or Advanced Walk Test. If you change a detector with
the control panel in Walk Test or Advanced Walk Test, you must manually initialize the detector as
detailed in “How to Manually Initialize a Detector” on page 102. The detector initialization routine
takes approximately 2.5 minutes, during which time the FACP remains in service. While initializing a
detector, follow these guidelines:
• Make sure the detector is free of residual smoke during detector initialization.
• Do not test a detector during detector initialization.
Note: The control panel only performs detector initialization if it senses that a detector was removed for at least 15
seconds. This is what actually “turns on” the detector. It is an automatic procedure but is specified here because of
the delay between detector connection and full function. The rest of the system remains in full service during this time.
A sample screen that appears on the LCD display during detector initialization.
Figure 33 Detector Initialization Screen
WARNING: If you replace any detector with a different type of detector (for example, replace a
laser detector with a photoelectric detector), you must immediately program the control panel
with the new detector Type Code. Failure to do so can cause incorrect control panel operation,
including false alarms. For instructions on replacing a detector, refer to “How to Replace a
Detector” on page 101.
System Testing and Detector Initialization
To facilitate system testing, the control panel does not initialize detectors during Walk Test and
Advanced Walk Test. You can remove a detector to confirm supervision, then replace the detector for
immediate testing. If you replace a removed detector with a different detector of the same type, you
must manually initialize the detector according to the instructions in “How to Manually Initialize a
Detector” on page 102. If, however, you want to replace a removed detector with a different type of
detector, refer to “How to Replace a Detector” on page 101.
How to Replace a Detector
If you replace a detector with a different type of detector, you must immediately program the control
panel for the new detector type. To replace a detector, follow these steps:
Note: Parentheses show an example of replacing an existing photoelectric detector at address 1D101 with a laser
detector.
Detector Initializing _ Please Wait
02:48P 071401 Sat
Step Action
1
Disable the point of the detector
. (point 1D101)
2 Remove the photoelectric detector and replace with laser detector set to the same address.
3 Autoprogram the panel to recognize the new detector type.
4 Enable new detector.
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