GEZE hold-open system FA GC 150
9
Hold-open system FA GC 150
3.4 Classification in accordance with EN 14637
Hold-open system
No. 1
Class 3
Application class
Frequent use by the general public and other persons with
little incentive to take care
No. 2
Class 8
Permanent function
500,000 test cycles
No. 3
Class 1
Door type
Swing doors
No. 4
Class 1
Suitability for use on fire/
smoke protection doors
Suitable for use on fire/smoke protection doors
No. 5
Class 1
Safety
Meets all requirements of EN 14637
No. 6
Class 0
Class 2
Class 3
No defined corrosion resistance
(in connection with automatic drives)
Moderate corrosion resistance in accordance with EN 1670
(in connection with the hold-open magnet GT 60 R)
High resistance in accordance with EN 1670
(in connection with the hold-open magnets
GT 50 R, GT 63 R and GT 70 R)
Class 4
Very high resistance in accordance with EN 1670
(in connection with all other GEZE
hold-open devices)
3.5 Planning of fire detectors and manual trigger switches
3.5.1 Smoke detector or thermal detector
Smoke detectors detect smoke. They work using the scattered light principle. A light transmitter and a light
interface are arranged in the measuring chamber in such a way that no light reaches the interface in the normal
case. If there are suspended particles (smoke) in the measuring chamber, these scatter part of the light onto the
interface, which converts this into an electric signal.
Accordingly, a smoke detector not only detects smoke but all other suspended particles and responds sensitively
to contamination.
Thermal detectors measure the ambient temperature and respond if the temperature exceeds a certain maxi-
mum value or increases quickly within a certain time.
Usually, smoke and fire gases spread quickly when a fire breaks out. It is only later that the temperature increases.
Therefore smoke detectors must be used for hold-open systems on fire protection doors on rescue routes. As far
as possible, smoke detectors should generally be used for hold-open systems. In areas where disruption such as
steam, dust, condensation or operation-related smoke development (workshops, kitchens) occurs, it may, how-
ever, be sensible to use thermal detectors rather than smoke detectors.
German
institute for
construction
technology
