CO2 CONTROL - assembly and operating instructions
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g)
Alarm unit
The 230 V version of the
alarm unit
is used to provide additional visual and audible alarms in hazard areas as well as in the entrances to hazard areas.
When used in combination with the
CO2 CONTROL AM
version, these can be directly connected, supplied with power, and their alarms switched off directly on
the add-on module.
h)
Luminous warning panel
The 230 V and 24 V versions of the
luminous warning panel
is used to provide additional visual alarms in the entrances to hazard areas.
i)
Mode of operation
The
sensor unit
determines the CO
2
content of the air and transmits the measured values to the
warning unit
. CO2 CONTROL has 2 alarm thresholds.
Under normal operating conditions, the
green
power light is lit.
Pre-alarm:
The pre-alarm is triggered when a CO
2
content of 1.5% is exceeded. An intermittent warning sound and the flashing red LED on the
warning unit
and
sensor unit
indicate a hazard.
Main alarm:
When the CO
2
content increases above 3%, the main alarm is triggered. This is indicated by means of a continuous sound and continuously lit red LED on the
warning unit
and
sensor unit
.
When the main alarm is triggered, no further access to the hazard area must be allowed!
The hazard can only be eliminated by switching on a fixed or mobile air extraction unit or
by the fire brigade!
All audible signals can be switched off by pressing the
Alarm off
key.
In the event of a pre-alarm, the visual alarm indicator switches off automatically once the gas concentration drops to normal levels. In the event of a main alarm,
the visual alarm indicator can only be switched off by once again pressing the key if the CO
2
gas concentration is lower than 1.5%. If the gas concentration is
between 1.5% and 3%, the indicator will switch from continuous to flashing light.
In the event of a system fault due to a cable break, short-circuit, sensor failure or other cause, the yellow indicator (Fault) on the
warning unit
and
sensor unit
and/or the green flashing LED on the
signal unit
will flash and an audible signal will sound; these can be acknowledged and/or cancelled by pressing the key. The
yellow indicator will remain lit until the system fault is eliminated and acknowledged by once again pressing the key.
Alarm
off
