(2) Mount the crank arm in place by inserting the rod
ends into the two holes at the edge of the arm plate on
top of the Operator. Be sure the pivot stud at the end of
the arm is pointing up. By sliding the arm into or out of
the arm plate holes, you can adjust the distance between
the center point of the arm plate to the pivot stud to
dimension "C" shown on Figure 3, 4, or 5. Tighten the
two set screws securely on each side of the arm plate to
secure the crank arm into the arm plate.
(3) Loosen the adjusting bolts on the connecting arm.
Remove the nut and washer from the crank arm pivot
stud and install the hooked end of the connecting arm
to the crank arm. Note that the extended hooked end
over-travel stop on the connecting arm should fall on
the side of the crank arm away from the gate pivot. The
gate bracket on the far end of the connecting arm should
then be attached to the gate cross rail with the 3/8" bolts
provided. (See Figure 3, 4, or 5).
(4) With the gate closed, the arms should then be
placed in a position so that the center point of the crank
arm pivot stud falls on a direct line between the center
point of the arm plate and the center point of the gate
bracket. With this accomplished, the adjustment bolts on
the connecting arm should be tightened.
(5) The gate should then be opened, with the clutch
disengaged, by manually breaking the dead center
condition of the crank arm and connecting arm away
from the gate pivot and then manually swinging the gate
open.
WARNING: After breaking the dead center position
of the arms, do not attempt to open the gate with
operator arms. Hands can be pinched between the
crank and connecting arms as the gate reaches the
open position.
(6) When the gate is fully open, the arms should
assume the position shown by the dotted lines in Figure
3, 4, or 5. If the arms reach a locking position before
the gate is fully open, a re-adjustment of the arms is
required.
E. WIRING THE OPERATOR
(1) Wire the Operator and control circuit as shown
onokay the wiring diagram enclosed, "General Operator
Wiring and Control Information Manual".
BE SURE ALL
POWER IS OFF.
F. PHASING OUT MOTOR
(1) Remove the weather plate, gasket, and retaining
ring from the arm plate and lift the arm plate from the
operator. Remove the wedge from the clutch.
(2) THREE PHASE: Turn power on. Using the left side
reversing contactor for counter-clockwise rotation, and
the right side contactor for clockwise rotation, press
one of the control buttons. Note the direction the top of
the operator is rotating. For a pair operation, operators
should be tested separately. If the top is rotating counter-
clockwise, then the left side contactor coil should be
energized. If the wrong coil happens to be energized, for
the counter-clockwise direction, exchange any to power
leads.
(3) SINGLE PHASE: The operator and reversing starter
are factory prepared for proper rotation.
(4) Check both directions several times to ensure proper
phasing of motors. In case the motor continues to run at
end of travel and the limit switch does not stop rotation,
check the limit switch function and review the proper
control circuit wiring.
SNAP ACTION
SWITCHES
PINION
SWITCH CAM
PULL OUTWARD,
AWAY FROM CENTER
AND ROTATE TO
ADJUST TIMING
Figure 6. Adjusting Limit Switch
Crown Industrial Operators • 213 Michelle Ct. • So. San Francisco, Ca 94080-6202
Phone: (650) 952-5150 • Fax: (650) 873-1495
www.crown-industrial.com Email: [email protected]
G-993-R3
6