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3:2 MAIN SWITCH REMOVAL AND REPLACEMENT
To remove the main normal or emergency switches, first electrically isolate the
transfer switch from all power sources.
a) Disconnect all cables and wiring from the switch terminals.
b) Open the cover on the operating arm, remove the pin slider and close the
cover.
c) Remove the switch operating arm assembly by removing the four screws
securing the pivot bracket to the back panel and lift the arm assembly
complete with bracket from the back panel.
d) The individual switches can now be readily unfastened and removed from
the back panel.
Replacement is the reverse of the above procedure. Note when replacing
the arm assembly, ensure that the switches are set one “off” and one “on”
and that the rollers on the arm springs equally straddle the switch operating
levers. Tighten the pivot bracket screws equally to ensure controlled
deflections of the arm springs.
3:3 MOTOR REMOVAL AND REPLACEMENT
– Electrically isolate the transfer switch from all power sources.
– Note the wire connections to the 12 position terminal connector.
– Cut the motor connection wires (white and black) approximately 3 inches
from the terminal block. Strip each wire ¾ of an inch, and attach the
corresponding leads from the new motor with wire connectors approved
for 18 gauge wire. Remove the arm assembly as previously described.
– Remove four screws securing the motor bracket to the back panel.
– Lift the assembly out of the transfer switch.
– Remove the crank and cam assembly by loosening the set screw in the cam
arm.
– Remove four screws securing the motor to the underside of the motor
bracket. The motor can now be removed.
Manual for AST3225
Automatic
Transfer Switch
