Window Master WMX 803

Chain actuator

  • Chain actuator for concealed installation
  • For comfort ventilation.
  • For all window types except roof lights.


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

Smoke ventilation
The product is suitable for smoke ventilation and use natural driving forces for the efficient exhaust of smoke and heat

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

Programmable 24VDC chain actuator for concealed installation in window profiles for comfort ventilation.
Not appropriate with roof windows.

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, also possible following installation.

Chain brackets to be ordered seperately.

Additional information

Stroke (mm)

Programmable, 50 – 250

Max Force (N)


Supply Voltage


Max Current (amps)


Max Speed (mm/s)


Locking Force (N)


Window Types

Bottom Hung, Centre Pivot, Rooflight, Side Hung, Skylight, Top Hung

IP Rating




Grey (RAL 9006)


Window Master
WindowMaster brand products

Product Applications

This product is suitable for:

  • Top-hung windows
  • Bottom-hung windows
  • Pivoting frame windows


Technical Details

WMX 504
20-36V DC
Traction force:
Chain Opening:
50 – 250 mm in increments of 10 mm, maximum opening depends on the window construction
7mm/s (programmable from 3mm/s to 9.5mm/s)
Locking Force:
3000 N
Current Consumption:
max. 0.5A
Switch on Duration:
ED 40% (max. 4 min. per 10 min)
Operating temperature:
-5°C – +74 °C max. 90% relative humidity (not condensing)
Protection Class:
Surface mounted: IP 20, concealed: IP 32

Download PDF's

Window Master WMX 803 Data Sheet
Window Master WMX 803 installation

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