Specifications

OpenAir GMA Series Spring Return, 62 lb-in, Rotary, Electronic Damper Actuators Technical Instructions
Document Number 155-315P25
January 26, 2011
Siemens Industry, Inc. Page 7
Accessories,
continued
EA0845R1
(14)
Figure 6. Weather Shield.
ASK75.3U: GMA actuators are UL listed
to meet NEMA 3R requirements (a
degree of protection against rain, sleet,
and damage from external ice formation)
when installed with ASK75.3U Weather
Shield and outdoor-rated conduit fittings
in the vertical position. See
Figure 20 for
dimensions.
Heating
Element
Thermostat
EA0992R1
Figure 7. Heater/Weather Shield
Assembly.
985-108: Provides protection for 24 Vac/dc
OpenAir GMA1xx actuators down to
temperatures of -58°F (-50°C).
Assembly includes:
• Weather Shield
• Heater Kit
Service Parts
EA0888R1
EA0889R1
985-094P10
Position indicators (10/pkg.)
985-093
Standard shaft
adapter.
985-098
Adjustment Tool.
EA0891R1
EA1089R1
985-092
Anti-rotation (mounting)
bracket.
985-124
499-ohm resistor assembly kit for
4 to 20 mA a
pp
lications.
Figure 8. GMA Series Service Parts.
Operation
GMA16x, GMA15x
Apply a continuous 0 to 10 Vdc, or 2 to 10 Vdc control signal between wire 8 (Y)
and wire 2 (G0) to operate the damper actuator. The angle of rotation is
proportional to the control signal.
A 0 to 10 Vdc or 2 to 10 Vdc position feedback output signal is available between
wire 9 (U) and wire 2 (G0) to monitor the position of the damper motor.
In the event of a power failure or when the operating voltage is shut off, the
actuator returns to the "0" position.
GMA12x and GMA 22x
When power is applied, the actuator coupling moves toward the open position
"90°". In the event of a power failure or when the operating voltage is shut off, the
actuator returns to the "0" position.