Owner's manual

54 en | Product description Duct Smoke Detector
F.01U.033.733 | 5.0 | 2011.11 Installation guide Bosch Sicherheitssysteme GmbH
1 Product description
The FAD-420-HS-EN Duct Smoke Detector is used to detect
smoke in ventilation systems. It enables the early detection of a
fire thanks to its compact housing design, which permanently
conducts air from the ventilation duct through the detector,
combined with its modern LSN
improved
bus technology.
A specially adapted photoelectric smoke detector of type FAD-
O420 is installed in the FAD-420-HS-EN to aid its function.
When the FAD-O420 detects smoke, it sends a message to the
fire panel, which then displays an alarm message and carries
out the necessary steps that have been programmed, for
example: shutting down the ventilators in the ventilation
system.
The FAD-420-HS-EN with smoke detector FAD-O420 is
identified as FAP-O420/FAD-O420 in the Local Security
Network (LSN) improved version.
A relay board that facilitates the activation of devices, for
example ventilators or smoke dampers, via a relay with change-
over contact, is available as an accessory.
1.1 Scope of delivery
For product overview see Page 55
1.2 Accessories
– FAD-O420 Photoelectric Smoke Detector
Qty. Component
1 Detector housing with connection board, detector base and cover
2 #10-24 x 1 in. screws for installing housing on ventilation duct
2 #10-24 expanding nuts for installing housing on ventilation duct
1 D344-1.54 Sample Tube, 0.46 m
1 Ventilation tube
2 Securing flanges for sample tube and ventilation tube
4 #8-32 x 9/16 in. screws for mounting the securing flanges
2 Foam rubber sealing rings
2 Air filters for sample tube and ventilation tube
1 Drilling jig (self-adhesive)