WMU 842

Chain actuator 400N 2A

  • Actuator for large and heavy windows – an elegant alternative to spindle actuators.
  • For comfort ventilation.
  • For top hung, bottom hung, turning and pivot window.

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WMU 842

About WMU 842

Main features

  • Natural ventilation

    Natural ventilation

    The product is suitable for comfort ventilation to ensure that the building’s users enjoy a comfortable indoor climate

24V Nominal voltage

    24V Nominal voltage

    The product is to be connected to a ±24V power supply



    The product communicates with power supplies with MotorLink® – an intelligent patented digital communication from WindowMaster

UL certified

    UL certified

    The product is UL certified according to UL325 for US and CSA C22.2 no.247-14 for Canada

Product Details

The actuator is a high performance actuator especially designed for large and heavy windows – an elegant alternative to spindle actuators.

Complete opening of the window within 60sec.

– to be used together with ±24V control units or control units with MotorLink®
– can be used together with espagnolette WMB
– synchronization of up to 4 window actuators - no need for an external
   synchronization module
– genuine position feedback and 3 speeds when using control unit with
– soft close function
– the electronics in this actuator can be programmed to suit specific
   requirements – i.e. pressure- and traction force, stroke, speed/sound level -
   with the WAT 100 programming box, this is also possible following
– built-in electronic load switch-off/end stop
– electronic actuator with micro controller
– the actuator has an integrated reverse function to ensure a prolonged life
   span of the window gaskets
– easy mounting


Technical specifikations
Chain opening 750mm
Opening speed 750mm in 60 sec.
Pressure force 400N
Tractive force 500N
Voltage nominal 24V DC
24V DC (max. 10% ripple)
Current consumption 2A
Size 80 x 54 x 765mm (HxBxL)
Colour anodized aluminium (EV1)
RAL colours at an additional price

Delivery includes

Actuator with 5m connection cable

Intelligent control of windows: MotorLink®

MotorLink® is a communication technology that enables 2-way control and feedback between window actuators and the Building Management System via the MotorController. All WindowMaster control systems are MotorLink® capable with many of our actuators. Click below to learn more and see related products.

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