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OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

November 5, 2012

Accessories,

Continued

EA0740R1

Figure 7. Tandem Mount

Bracket.

ASK73.2U: Bracket provides an extended anti-

rotation pin allowing two OpenAir modulating

actuators to directly drive a single damper shaft.

Tandem mounting bracket for two GCA16x

(standard to 10 Vdc modulating control) Series

Actuators mounted on the same side of the

damper shaft.

NOTE: For applications requiring single

damper shaft operation by up to four

GCA modulating control signal

actuators mounted on each side of

the damper shaft, use the GCA15x

Series Actuator with Master/Slave

mode operation selected.

Figure 8. Special Shaft Adapter.

ASK74.1U: Shaft adapter will attach to a

1.05-inch (26.6 mm) diameter shaft; the

standard self-centering adapter will accept up

to a one-inch (25.4 mm) diameter shaft.

• Adapter can be used for coupling to

slightly oversized one-inch (25.4 mm)

jackshafts.

• Shaft adapter is 13/16-inches (20 mm)

shorter than the height of the self-

centering shaft adapter.

EA0845R1

(14)

Figure 9. Weather Shield.

ASK75.1U: GCA 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 ASK75.1U Weather Shield and outdoor-

rated conduit fittings in the vertical position.

For dimensions, see

Figure 28.

Heating

Element

Thermostat

EA0992R1

Figure 10. Heater/Weather

Shield Assembly.

985-106: Provides protection for GIB, GBB

and GCA OpenAir actuators down to

temperatures of -58°F

(-50°C). Assembly includes:

• Weather Shield

• Heater Kit

EA1089R1

Figure 11.

499 Ohm Resistor Assembly Kit.

985-124: Used for converting a 4 to 20 mA

controller output signal into a 2 to 10 Vdc

actuator signal.

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