User Manual
CE1N4618en
23.04.2003
Siemens Building Technologies
HVAC Products
4
618
OpenAir
TM
Interlocking plate for fire
protection applications
ASK79.1/…
Mechanical safety device
− Rigid connection to the damper’s shaft
− Correct functioning guaranteed up to 1,200 °C
− Interlocking mechanically irreversible
Use
The patented ASK79.1/… interlocking plate is used in connection with fire protection
dampers. It is designed for rigid connection to the damper’s shaft. Whenever the plate
reaches a temperature of about 90 °C, it interlocks the shaft mechanically and irre-
versibly. Correct functioning is ensured up to 1,200 °C. The device is designed for one-
time use under high temperature conditions and must be replaced after a fire has oc-
curred. The ASK79.1 has been designed for use with OpenAir
TM
spring return damper
actuators type GGA126.1E… (AC 24 V) and GGA326.1E… (AC 230 V) supplied by
HVAC Products.




