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Wind and rain detector WRM/2 24V and Rain detector RM/2 24V
Function
The WRM/2 24V wind and rain detector and the RM/2 24V rain detector close
dome lights and roof and/or facade windows automatically at the onset of rain,
snow or wind*. They are intended for connection to SHE or ventilation control
units. The required 24 V AC/DC/110 mA voltage supply is provided by these
control units.
Neither 24 V nor 230 V drives can be connected directly. At the onset of rain or
snow, or if wind speeds* exceed the pre-programmed switching threshold, the
integrated electronic evaluation system in the wind and rain detector issues a
CLOSE command.
The SHE or ventilation control unit processes this command and the relevant
opening units are closed. The opening units will not open again until the rain/
snow has stopped, the rain sensor surface is dry and the wind speed has drop
-
ped below the switching threshold level.
The wind and rain detector and the rain detector are housed in a weather-
resistant plastic case with a cup anemometer*, heated rain sensor surface and
electronic evaluation system.
The sensor surface heating operates at temperatures below 10 °C and in rain
or snow up to a maximum ambient temperature of 50 °C. In solar mode the
heating is normally switched off.
The detectors are mounted in a suitable position on the roof. The mounting
bracket is included in the scope of supply; the stand tube should be ordered
separately as an accessory part.
The wind speed and the switch-on delay (the interval after which the unit
should react to the wind speed) can be adjusted on site *. A DIP switch can be
used to allow the wind sensor and/or the rain sensor to be deactivated separa-
tely and to be switched from continuous operation to pulse operation.
Special features
• energy-efficient heating
• with integrated electronic evaluation system
• supply voltage 20 – 30 V DC or 20 - 28 V AC
• suitable for solar ventilation system
• potential-free changeover contact output
• wind pulse transmission can be via separate output*
Note:
The WRM/2 wind and rain detector and the RM/2 rain detector
are suitable for several different types of control unit. Please take note of the
DIP switch configuration inside the detector unit (see DIP switch mode).
* only for the WRM/2 with transmission via relay output
Please keep these operating instructions for future reference and maintenance.
Subject to technical modifications. Diagram is not binding.
Wind and rain detector and second generation rain detector
WRM/2 24V
RM/2 24V
