User Manual

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Siemens Actuators for fire and smoke protection dampers GRA126.1E/.., GRA326.1E/.. A6V10888424en
Building Technologies 2016-12-05
Functions
• Direction of rotation (clockwise or counterclockwise) determined by the way the
actuator is mounted on the damper shaft
• When operating voltage is applied, the actuator travels toward the 90° position
• If the thermal fuse cuts out at a duct or ambient temperature of 72 °C (Optional:
95 °C), the return spring drives the actuator to the failsafe position (0°)
• In the event of a power failure or if the operating voltage is turned off, the return
spring drives the actuator to the failsafe position (0°)
The actuator is equipped with an automatic switch-off mechanism.
The position indicator located on the shaft adapter shows the rotational angle position
of the damper blade.
• When dead, the actuator can be driven to any angular position using a hex wrench
and can then be secured with a screwdriver
• The actuator returns to its zero position when mechanically delocked with a hex
wrench (turning toward "90° - opening") or by applying power for a short moment
Square shafts 10 x 10 or 12 x 12 mm.
Type summary
Operating
voltage
Auxiliary switches
With temperature
monitoring unit
Without temperature
monitoring unit
AC 24 V
DC 24…48 V
Fixed switching points at 5° and 80°
GRA126.1E/T10
GRA126.1E/T12
GRA126.1E/10
GRA126.1E/12
AC 230 V Fixed switching points at 5° and 80°
GRA326.1E/T10
GRA326.1E/T12
GRA326.1E/10
GRA326.1E/12
Due to the mounting choices depending on the direction of rotation and the shaft
length, shaft adapter with position indicator and other mounting accessories are
shipped unassembled together with the actuator.
The actuators come with 0.9 m long prewired connecting cables.
The cable length to the ready fitted temperature monitoring unit is 0.9 m.
Designation Type reference Data sheet / mounting instruction
Duct tip to temperature
monotoring unit
ASK79.4 / 72 °C
ASK79.5 / 95 °C
A6V10890425 / M4610
Equipment combinations
The damper actuators can be used with all types of controllers having a 2-position
output and delivering a switching voltage of AC 24 V / DC 24…48 V or AC 230 V.
Basic functions
Rotary movement
Failsafe function
Behavior in the event the
damper is blocked
Position indication
Manual adjustment when
actuator is dead
Rigid connection
Delivery
Connecting cables
Accessories