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8.1.2 Automatic / Manual / Isolate Key Switch
1.
Automatic Position
In the Automatic Position the EWS will enter the programmed evacuation sequence when an alarm
signal is received from an FACP or EAID.
The switch key is removable only in this position.
A green automatic indicator is illuminated when the switch is in the automatic position.
2.
Manual Position
The purpose of this position is to take manual control of the building evacuation, irrespective of the
state of the alarm signals. This position also allows routine testing of the building alarm system and
EWS.
The automatic initiation of an evacuation sequence is inhibited.
If the EWS has entered the evacuation sequence whilst in the AUTOMATIC position and the EWS is
switched to the MANUAL position, the state of the EWS at that instant is held, i.e. each zone's output
remains in that state and the sequences are halted.
If Switch 7 of the timeout selection switch (see section 13.2) is OFF, and the Key Switch is switched
back to the AUTOMATIC position, all active evacuation sequences are cancelled and the state of the
EWS remains unchanged.
If Switch 7 of the timeout selection switch (see section 13.2) is ON, and the Key Switch is switched
back to the AUTOMATIC position, all active evacuation sequences (including sequences triggered
while the EWS was in manual) resume. Any emergency zones that were manually changed while the
EWS was in manual will remain – however the zones maybe changed to a higher priority by an
evacuation sequence.
3.
Manual Override of SECP's
Where an EWS has more than one ECP, any ECP can take manual control of the EWS by turning the
key-switch to the MANUAL position. Only the MECP being switched to the MANUAL position shall
override any SECP with its key-switch in the MANUAL position.
Each ECP is fitted with an "REMOTE ECP IN CONTROL" indicator. When an ECP is switched to the
MANUAL mode, all other ECP's in the EWS will illuminate their REMOTE ECP IN CONTROL indicator.
If an SECP is in control and the MECP is switched to MANUAL, the MECP will then take control, its
REMOTE ECP IN CONTROL indicator will switch off and the SECP which was previously in control will
illuminate its REMOTE ECP IN CONTROL indicator.
When the key-switch at a ECP is in the manual position the alarm system isolated indicator will
illuminate steady.
4.
Isolate Position
This key-switch position is local to the ECP and will not affect any other ECP's. A red indicator is
illuminated when the switch is in this position.
The ECP will not recognise the isolated position if selected from the manual position. When selecting
the EV3000 to isolate, the switch must be rotated from automatic, through manual, to isolate position
MAN1813-9
8
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