Smoke & Heat Extraction Systems

GEZE RWA exhaust systems
geze electrically operated chain drives
RWA chain drive E 740 on skylight
Calculation of the area of application depending on casement weight and casement dimensions
Permissible wind loads must be taken into consideration!
GEZE RWA
Equation for calculating opening and closing force:
F = P x 0.68
Key
F
P
Drive force required for opening (N)
Casement weight (kg)
Smoke and heat
extraction systems
(RWA)
Example for E 740 in individual operation:
P = 25 kg = approx. 250 N
F = 250 x 0.68 F = 170 N
Horizontal windows and light domes
Example for two drives E 740 Syncro:
P = 60 kg = approx. 600 N
F = 600 x 0.68 F = 408 N
F
P
F max. = 250 N (individual operation)
F max. = 500 N (synchronous operation)
Minimum casement dimensions
Bracket
AW RM/FM
Stroke 100 mm
250 mm
Min. casement
height
Stroke 200 mm
Stroke 300 mm
450 mm
600 mm
Stroke 400 mm
750 mm
Min. casement
width
Individual
operation
Synchronous
operation
450 mm
1000 mm
Projection range
0-20 mm
Min. space
requirement
on the frame
on the casement
60 mm
42 mm
Min. casement heights depending on projection
j
j
Min. casement height depends on projection and increases as projection increases
Guideline values: Installation can vary depending on the type of window
Casement height up to centre of hinge (mm)
Max. stroke 100 mm
Max. stroke 200 mm
Max. stroke 300 mm
Max. stroke 400 mm
Projection (mm)
Space required
for casement
Space required
for frame
40
60
GEZE RWA systems
19