S&C AS-1A Instructions For Installation Manual page 6

S&C Switch Operators - Type AS-1A
I
INSTALLATION - Continued
Step 2
Make certain that the cutting tips of the piercing set
screws do not protrude through (1) the body of the flexi-
ble coupling on the switch operator output shaft and (2)
the body of the universal coupling and thrust bearing at
the upper guide bearing and universal coupling groups ( or
the body of the rigid coupling if an intermediate guide
bearing assembly is used).
Pass the lowest section of vertical operating pipe up
through the guide bearing and then through the thrust
bearing and insert the pipe section into the universal cou-
pling ( or, if an intermediate guide bearing assembly is
used, pass the vertical-operating-pipe section up through
the guide bearing and insert the pipe section into the
rigid coupling). Do not tighten the coupling clamp or
piercing set screw at this time. (The lower end of the
Pushbutton protective
cover (open)
Remote-control blocking
switch (Catalog Number
Suffix "-Y")
Open/close pushbuttons
Arrow plate
Extra auxilliary switch,
8-PST (Catalog Number
Suffix "-W"); 12-PST version
(Catalog Number Suffix "-Z")
is similar
Motor contactor,
opening
Motor contactor,
closing
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lowest section of vertical operating pipe will, of course,
be cradled in the open flexible coupling attached to the
output shaft of the switch operator.)
While holding the pipe section in this position, and
with the thrust bearing resting on the guide bearing,
tighten the piercing set screw in the thrust bearing,
piercing the pipe, and continue turning until a firm resis-
tance is felt. At the universal coupling, tighten the
clamp bolt to final tightness, then tighten the associated
piercing set screw, piercing the pipe, and continue turn-
ing until a firm resistance is felt.
(If
an intermediate
guide bearing assembly is used, tighten the clamp bolt
on the rigid coupling to permanent tightness; then
tighten the associated piercing set screw, piercing the
pipe, and continue turning until a firm resistance is felt.)
Operation counter
(optional on earlier models)
Position-indexing drums
Travel-limit switch, 2-PST
(not visible in photo)
- - - Auxiliary switch, 8-PST
i--- -
Extra auxiliary switch,
4-PST (Catalog Number
Suffix "-Q")
Motor-circuit two-pole
- - - - - pull-out fuseholder
Manual operating handle interlock switch
and mechanical blocking rods
Conduit-entrance
plate
Figure 2. Interior views of switch operator.
769-500
INSTRUCTION SHEET
Page 6 of 23
April 22, 1996
S&C ELECTRIC COMPANY• Chicago
It
S&C ELECTRIC CANADA LTD.• Toronto