WindowMaster WLA 331 Manual

Operation Manual / Technical Information
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WLA 331 install 2205-EN ©2005, 2022 WindowMaster A/S ®WindowMaster is a registered trademark used under licence by WindowMaster International A/S
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Rain sensor
WLA 331
Table of contents:
Technical function description
Operating/control and display elements
Connection to control units
Settings
Technical data

2
Technical function description –rain sensor WLA 331
Description:
The rain sensor comprises a rain sensor surface.
This sensor is used for the automatic control of smoke ventilation and comfort ventilation units.
The rain sensor is equipped with a potential free change-over contact having a contact rating of 60V/2A.
In the event of rain, the change-over contact switches over from the N/C contact to the N/O contact.
The settings for the wind trigger threshold, the actuation delay, the drop out delay and the trip in the event of a
mains failure are made by a 6 pole DIP switch in the sensor.
Operation / Function:
Triggering by rain:
The potential free contact switches when the rain sensor trips.
The red LED in the sensor is lit.
Remark:
The trip is reset 10 or 20 min. (settable) after the last sensor actuation.

3
Operation/control and display elements –rain sensor WLA 331
6
5
4
3
2
1
1
6
For assembly, remove plug connection from the cover.
Do not mismate during assembly.
Relay
LED
on
Connection terminals
DIP switch
Terminal 1 = Supply voltage AC/DC
= Relay (arm)
4 = (N/C contact)
5 = ( )
6 is internally connected to terminal 2.
Terminal 2 = Supply voltage AC/DC
Terminal 3
Terminal Relay
Terminal Relay N/O contact
Terminal
1 2 3 4 5 6
AC/DC AC/DC
off
1 2 3 4 5 6
AC/DC AC/DC
Connection (DIP switch 6 = off)
Switching
contact (N/O)
Supply
voltage
Central unit
1 2 3 4 5 6
AC/DC AC/DC
Connection (CIP switch 6 = on)
automatic trip in the event of a supply voltage failure
Supply
voltage Switching
contact (N/C)
Central unit
”Closes when rain“
”Closes when rain and/or supply voltage failure“

4
Connection to control units –rain sensor WLA 331
Settings –rain sensor WLA 331
Various rain parameters and operating modes can be set by means of the installed DIP switches.
DIP switch settings
Test
Operation
Switch 1
off
on
Switch 2
off
on
Switch 3
off
on
Note:
Factory setting = operation, meaning switch 1+2+3+6 = on and switch 4+5 = off.
Should there during installation be the need to disconnect the rain drop out delay, set switch
1+2+3 = off (= Test).
Important! Once installation and star-up are completed, the switches 1+2+3 MUST be on!
Remark: In the test setting, the activation and drop out delay is deactivated!

5
DIP switch settings
Switch setting OFF
Switch setting ON
Switch 4 = deactivated
Switch 5 = Rain drop out delay
10 minutes
20 minutes
Switch 6 = Monitoring
Off
on
Information regarding switch 6:
Only the supply voltage (terminals 1+2) for the sensor is monitored.
The system will trip automatically in the event of a supply voltage failure.
Technical data –rain sensor WLA 331
Display:
Red steady light in the sensor LED = Sensor tripped by rain.
Technical data
Supply voltage: 18V to 26V AC or
20V to 32V DC
Circuit output: 1 x potential free change-over contact
Switching capacity: 60V / 2A
Sensor dimensions: 80 x 80 x 55mm (WxHxD)
Sensor weight: approx. 0.3kg
Sensor protection type: IP65
Setting of the rain drop out delay: 10 min. / 20 min.
Setting of the monitoring: Off / On
CE sign: in accordance with the EMC directive and the low voltage directive
Connection:
Terminal 1 = Operating voltage AC/DC
Terminal 2 = Operating voltage AC/DC
Terminal 3 = Relay (arm)
Terminal 4 = Relay (N/C contact)
Terminal 5 = Relay (N/O contact)
Miscellaneous:
Only allow qualified personnel to connect the control system.
Note the VDE 0100 for 230 Volt main connection.
Note VDE 0855 as for aerial systems with regard to the mechanical
stability, electrical safety and lightning protection.
Clean the sensor regularly depending on the degree of soiling.