6.2.5.4
Installation of the system and suction pipes when monitoring several 19" cabi-
nets
The system can protect a nominal fill of
2.8 m³ (98,9 ft
3
). If this nominal fill is distrib-
uted across several 19" cabinets, then the
suction pipelines (Fig. 37/1) are to be
installed in each 19" cabinet in order to
ensure rapid detection.
When monitoring more than two 19" cabi-
nets, the superordinate system itself should
be placed in a middle 19" cabinet so two
pipeline paths arise which are as identical
as possible and fluidically convenient. The
total length of the pipeline must not exceed
20 m (66 ft).
When using one system to monitor several
19" cabinets, the 19" cabinets must not be
separated by partition walls.
6.2.6
Instructions for the use of the DET-AC III Master system with simulta-
neous use of an automatic door opening "ADO"
19" cabinets can be equipped with an automatic door opening "ADO". In the case of
an automatic door opening "ADO", there are flaps in the door of the 19" cabinet. The
flaps are opened automatically, e.g. if the cooling system in the 19" cabinet fails.
L
CAUTION
Unwanted release due to absent blocking!
If the active extinguishing system DET-AC III Master is used in 19" cabinets with an
automatic door opening "ADO" from Rittal and no flap is monitored, the system is
not blocked when a flap is open. The system can however be released in the event
of detection.
● In addition to the monitoring of the door, install at least on one flap of the auto-
matic door opening "ADO" a monitoring with a door contact switch (type
7030.128).
Installation of the door contact switch
Chapter 6.3.5.1 “"RJ12 plug" door contact
Assembly of the door contact switch and operation of the flaps: see documentation
from the manufacturer of the automatic door opening "ADO".
1
Fig. 37: Monitoring several 19" cabinets
Assembly and installation
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US
47