8
ATTACHING THE CHAIN BRACKET
The chain brackets provided with the Tower operator should be
mounted on the the gate with the centerline of the slot 8" above the top
of the operator pad. Attach one end of the chain to the gate and thread
the other end through the idler pulleys and drive sprocket. Attach the
free end to the bracket on the gate and tension the chain. You will
normally require a welder, or an electric drill with a 3/8" bit, for
attaching the chain brackets to the gate. See Figure 8.
PLACING THE VEHICLE DETECTOR LOOPS
Proper placement of vehicle detector wire loops is critical if the loops
are to provide satisfactory, extended service. The most important
considerations are: 1) Proper wire type and, 2) Good, tight connections
from the loop to the loop terminating connector. When a "Stand
Alone" vehicle detector is used, the detection loop is connected to the
wire harness on the detector itself. (See WIRING VEHICLE
DETECTORS, Page 11.)
The Tower provides for the use of a “reversing” loop that will prevent
the gate from closing on a vehicle that has stopped in the path of the
gate. Note the "reversing” loop is normally made up of two independent
loop layouts connected to one detector. See Figure 9 above..
Two different types of installations will usually be encountered: 1) If
the driveway material is already in place, saw cuts will be needed to
B
: PREPARING THE SITE
RISK OF ENTRAPMENT
VEHICLE DETECTOR LOOPS WILL NOT DETECT
SMALLER VEHICLES SUCH AS MOTORCYCLES
OR GOLF CARTS, OR BICYCLES OR
PEDESTRIANS. PHOTOELECTRIC DETECTORS,
EDGE DETECTORS AND SEPARATE
PEDESTRIAN ACCESS MUST BE INSTALLED.
W A R N I N G !
Figure 9: Loop Diagrams
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