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IMPORTANT: SEA recommend to install at least 2 separate non contact sensor as on the
post close to the gate as at furthest point of the opened gate where the risk of entrapment
exists in order to avoid any risk of damage/injury (see pg. 11 Typical Installation). SEA also
recommend to install infrared Photo beam for a higher performance of use.
9) For a gate operator utilizing a contact sensor (Edge sensor or like) in accordance with section
31.1.1 of the UL 325 standards:
I. One or more contact sensors shall be located where the risk of entrapment or obstruction
exists, such as at leading edge, trailing edge, and post mounted both inside and outside of a
vehicular horizontal slide gate.
II.
One or more contact sensor shall be located at the bottom edge of a vehicular vertical lift
gate.
III. One or more contact sensor shall be located at the pinch point of a vehicular vertical pivot
gate.
IV. A hardwired contact sensor shall be located and its wiring arranged so that the
communication between the sensor and the gate operator is not subject to mechanical
damage.
V.
A wireless contact sensor such as one that transmits radio frequency (RF) signals to the gate
operator for entrapment protection functions shall be located where the transmission of the
signals are not obstructed or impeded by building structures, natural landscaping or similar
obstruction. A wireless contact sensor shall function under the intended end-use conditions.
VI. In case of a swing gate one or more contact sensors shall be located on the inside and
outside leading edge of the gate. Additionally, if the bottom edge of a swing gate is greater
than 6 inches (152mm) above the ground at any point in its arc of travel, one or more contact
sensors shall be located on the bottom edge (see pg..for Typical Installation)
VII. One or more contact sensors shall be located at the bottom edge of a vertical barrier (arm)
SEA warns that the gate operator system with an A.C. power electric motor shall have a
reversing sensor (encoder) on the drive shaft of the motor as additional safety device. In
case of swing linear/in-ground hydraulic operator SEA recommend to install the “SAFETY
GATE” as an additional reversing sensor.
11) The professional installer has to check that the main power supply circuit breakers are
separate, intended solely for this equipment and rated for 15 AMPS. Visually check that the circuit
breakers are in the "OFF" position and mark the circuit breakers "USED" prior to installation.
12) During service the main power MUST always being disconnected.
13) If this gate operator system includes a battery backup, the battery backup system needs to be
disconnected first, prior to disconnecting main power supply during installation, maintenance and
servicing procedures.
14) After installation The professional installer has to check that the gate operator system is
working properly, that the open and close force are properly adjusted, that the piston does not
bottom out in either direction, that breather screws have been removed, that the positive stops used
are sufficient for stopping the gate properly, and that all pinch points and potential entrapment
areas are reduced.
ALPHA
SAVE THESE INSTRUCTIONS
READ AND FOLLOW ALL INSTRUCTIONS
4
International registered trademark n. 2.777.971
REV 03 - 06/2009
