How To Isolate / De-Isolate A Zone - Simplex LT0290 User Manual And Reference Manual

Page 14 SIMPLEX 4120 NETWORK FIRE INDICATOR PANEL
OPERATOR MANUAL
If the system does not reset, no fire exists, and the display still shows an alarm, read the
alphanumeric display to determine the type of device and the zone number in alarm. Follow
local procedures to investigate the area of the building with the alarm. Look for devices still
in alarm (manual call points, smoke detectors, etc.). Most devices latch until they are reset,
either by the system or manually.
2.4

HOW TO ISOLATE / DE-ISOLATE A ZONE

If a device will not reset, the user may elect to perform the ISOLATE procedures listed
below.
IMPORTANT
IT IS IMPORTANT TO REMEMBER THAT ONCE A POINT IS ISOLATED, IT WILL NOT
PROVIDE FIRE PROTECTION. REPAIR/REPLACE THE DEVICE AS SOON AS
POSSIBLE. ONCE REPAIRED, THE POINT SHOULD BE ENABLED AS SOON AS
POSSIBLE.
If a device does not reset, the user may isolate the device/point causing the abnormal
condition. This point must first be identified. This can be accomplished by reading the
alphanumeric display while pressing the <ALARM ACK> key. The point can then be
isolated by using the individual zone ISOLATE toggle switches as described below :
Press down the ISOLATE toggle switch next to the zone or point to be isolated - refer Figure
4, e.g. ( AZF1 1st Floor East Wing Room 23 ).
Once the toggle switch has been depressed, the yellow ISOLATE LED adjacent to the
toggle switch will light ,indicating that the point or zone is now isolated.
Figure 4 - ISOLATE Toggle Switches
Document No.: 4100-M004 June 1997 Issue 1.0