Isolating (Silencing) The Warning System Or External Bell; Overview; Isolating The Ews; Isolating The External Bell - Tyco 4100ES Operator's Manual

Isolating (Silencing) the Warning System or External Bell

Overview

Isolating the EWS

Isolating the
External Bell

Isolating the Zone

When an alarm condition occurs, the building's warning system activates to warn the
building's occupants about the alarm condition. In addition, the external bell sounds to
indicate the location of the 4100ES to the fire brigade. During maintenance or testing, these
outputs can be prevented from activating by isolating them before an alarm occurs. In a real
alarm situation, they should be left operating until brigade personnel choose to turn them off.
While the alarm exists and the zone is not isolated, pressing the <WARN SYS ISOLATE>
key (control key) toggles the state of the warning system output.
The following occurs when the <WARN SYS ISOLATE> key is first pressed:

Warning System Isolate indicator turns steady ON.

The Emergency Warning System (EWS) turns OFF. If the EWS is a separate system (e.g.
EWIS), then you may have to manually reset the EWIS panel.
If another alarm occurs, the 4100ES will not activate the EWS again until the warning system
is de-isolated. Do this by pressing the <WARN SYS ISOLATE> key again so that the
Warning System Isolate indicator turns OFF.
When the alarms in the panel have been reset, leave the EWS de-isolated.
While the alarm exists and the zone is not isolated, pressing the <EXT BELL ISOLATE> key
toggles the state of the external bell output.
When the bell is sounding due to an alarm condition, pressing the <EXT BELL ISOLATE>
key once does the following:

EXT BELL ISOLATE indicator turns steady ON.

The External Bell turns OFF.
If another alarm occurs, the 4100ES will not activate the external bell again until it is de-
isolated. Do this by pressing the <EXT BELL ISOLATE> key again so that the EXT BELL
ISOLATE indicator turns OFF
When the alarms in the panel have been reset, leave the external bell de-isolated.
Note that pressing the Isolate key for every zone that is in alarm will turn on each
corresponding zone isolate LED and turn off all outputs activated by the zone being in alarm,
such as the warning system and external bell.
Note also that with a point or zone in alarm, e.g., from an Alarm Test, these Isolate keys can
be used during testing to briefly allow an output to turn on and check that it works.
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