Description · Application
3
Description
The smoke detector works on the optical light scattering
principle and is used to monitor the ventilation duct in air
conditioning systems. When used with a fire damper, it
prevents cold smoke with a temperature of
72 °C from
propagating through the AC system.
In the function mode, the smoke alarm of the smoke
detector is permanently flushed by the air flow in the duct
being monitored. If the smoke density exceeds a specific
concentration, the smoke alarm breaks the power circuit
to the control device of the fire damper; and the damper
closes. To ensure the specified function, the smoke detector
is also fitted with an air velocity sensor which monitors the
air flow in the immediate vicinity of the smoke alarm. A lack
of air flow, eg. caused by a closed damper or fan failure, is
signalled by an LED and opening relay contact.
The electrical safety circuits of the smoke detector are
constantly checked electronically and signalled on failure
by an LED and closing relay contact. At the same time, the
opening of the alarm relay contact interrupts the control
circuit and the fire damper closes. To avoid false alarms
due to pollution, the smoke alarm sampling chamber is
continuously monitored electronically. If a permitted threshold
of “> 70 ± 10 units” is exceeded, a signal is given by an LED
and closing relay contact.
The actual pollution value can be scanned directly at the
smoke detector or on the remote control terminal using the
diagnostic instrument.
Installation of a remote control terminal enables the electrical
function tests to be carried out from a central point, e.g. fire
control room.
Application
All fire dampers fitted with electric or electric/pneumatic
control devices which operate when voltage is removed may
be controlled via the smoke detector.
This is recorded in the general building authority permits for
Trox fire damper.
The smoke detectors are marked with the U symbol in
accordance with the Approval Mark regulations in Germany.
The external verification prescribed by law is carried out by
VdS e.V, Cologne.
Smoke detector with
power supply, monitoring
electronics, smoke alarm
and air velocity monitor
Remote control terminal
Diagnostic instrument
Fire damper
Spring return actuator
Central control point
Test
Rückstellung /
Reset
Rauchauslöseeinrichtung
Typ RM-O-VS
>70%
v <2m/sec
Elektronik
Rauch /
Smoke
Schmutz /
Pollution
Luft /
Air
Betrieb / Operation
Gebrüder Trox GmbH
D-47504 Neukirchen-Vluyn
Telefon 0 28 45/2 02-0
Telefax 0 28 45/20 22 65
Alarm / Störung / Failure
Anschluß
Diagnosegerät
Diagnostic link
Betrieb / Operation
Alarm / Störung / Failure
Rauch /
Smoke
Elektronik
Test / Rück-
stellung
Reset
Anschluß
Diagnosegerät
Diagnostic link
Schmutz /
Pollution
Luft /
Air
>70%
v < 2m/sec
Terminal T-RM-O-VS zur
Rauchauslöseeinrichtung
RM-O-VS
15
Typ D-RM-0-VS
1
8
9
10
11
12
Airflow
v = 1-20 m/s
