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I.B. 8926-1
DOOR REMOVAL AND INSTALLATION
All doors on the control center are mounted on pin hinges
to facilitate removal for installation and maintenance op-
erations. With the operating handle in the OFF position,
rotate the quarter-turn latches, open the door, remove
the hinge pins as shown in Figure 26, partially close the
door and lift it from the structure. Reverse this proce-
dure for installation.
UNIT REMOVAL AND INSTALLATION
After opening and/or removing the unit door, the control
unit is exposed. With a screwdriver, push in on the latch
at the top center of the unit and rotate 1/4 turn
counterclockwise. CAUTION - Units 18" or more high
have a retaining brace at the lower edge of each side of
the unit frame to add stability in shipping. The shipping
braces may be retained or removed after installation;
unscrew prior to unit withdrawal. Pull-apart terminal
blocks in the vertical wireway must be disengaged (see
Figure 27 and page 10) and wiring from the unit to other
units, to master terminal blocks or to load devices must
be disconnected before the unit is removed. Grasp the
unit as shown in Figure 28 and pull it outward. The first
inch of travel pulls the stabs free from the vertical bus,
and the grounding clip on the side of the unit frame is
also disengaged.
To replace a control unit, position the mounting points
on the unit frame with the mating guide rails. Slide the
unit inward until all four mounting points are engaged,
then move it inward with a quick push. This movement
easily overcomes the compression of the stabs as they
engage the vertical bus. With the unit in its correct posi-
tion, the quarter-turn latch is easily engaged by pushing
inward and rotating 1/4 turn clockwise.
PART 9
UNIT INSTALLATION AND ADJUSTMENT
Fig. 26 Hinge Pin Removal
Fig. 27 Disengaging Pull-Apart Terminal Blocks
Содержание Freedom 2100
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