Installation
S&C Instruction Sheet 716-500 21
Setting up the Operator and Checkout
STEP 22.
CAUTION
Unauthorized changes should not be made in the wiring
of the operator. Should a control-circuit revision appear
desirable, it should be made only on the authority of a
revised wiring diagram that has been approved by both
the user and S&C Electric Company.
Do not apply control voltage to the operator at this time.
Perform the following set-up procedure on the operator. See
Figures 23 through 25 on pages 22, 23, and 24.
(a) To avoid accidentally energizing the operator after
the external connections have been completed,
open the control power Knife switch, and then
swing the Knife switch retainer arm out of the way
by putting pressure on the red insulated retainer
and the black nylon retainer nut. The Knife switch
retainer arm will “pop up” and can then be swung
out of the way. See Figure 25 on page 24.
(b) Mark the conduit-entrance location for the control-
circuit wiring on the conduit-entrance plate at the
bottom of the operator enclosure. Then remove the
plate and cut out the necessary opening. Apply the
sealing compound furnished, replace the plate, and
make up the entrance ttings. Verify the entrance
ttings are properly sealed to prevent water ingress.
NOTICE
Make sure the polarity of the control circuit is correct
on dc-control-voltage models. Energizing the switch
operator with polarity reversed will cause damage to the
operator control circuit and will require repair or replace-
ment of the operator.
(c) Connect the external control-circuit wiring
(including the space heater source leads) to the
terminal blocks at the bottom of the enclosure, in
accordance with the wiring diagram furnished.
Observe correct polarity on dc-control-voltage
models.
NOTICE
Trip-circuit conductors and motor-and-closing circuit
conductors must be adequately sized for the ampacities
indicated on the wiring diagram.
DO NOT apply control voltage to the operator at this
time.
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