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DEH-41473
Installation
Exhaust Plenum above Switchgear
The recommend procedure to install the exhaust plenum
above the switchgear is as follows:
1.
Prior to installing the individual sections of the
exhaust plenum system, it is important to identify the
different sections for each stack width and transition
adapters to be installed on the very left end section
and the very right end section of the equipment
lineup (Figure 3.2). The exhaust plenum sections
above each section of the switchgear will have an
external flange on three sides (Figure 5.4). The left
and right end sections of the transition adapters will
have an end flange as shown in Figure 5.3.
2.
Remove the #10-32 x ¼ inch hardware attaching the
access cover to the exhaust plenum section (Figure
5.6). Be sure to retain the hardware and the access
cover for re-installation later in this instruction
manual.
3.
Remove and discard the temporary cover that is
attached to the top of the plenum flange at the top of
the switchgear section (Figure 5.5). Be sure to retain
the mounting hardware for in step 4.
4.
Raise the exhaust plenum section to the top of the
switchgear and align the opening and hole pattern in
the bottom of the exhaust plenum with the opening
and hole pattern on the plenum flange (Figure 4.7).
Attach the exhaust plenum section to the plenum
flange using the hardware retained in Step 3. Torque
the hardware to 7-9 ft.-lbs. Be sure that the access
cover opening is facing toward the front of the
switchgear.
Figure 5.3 Left and right end flange detail of transition
adapter
©2016 General Electric. All rights reserved.
Courtesy of NationalSwitchgear.com
AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 5. Exhaust Plenum Installation
Figure 5.4 Flange detail above switchgear
Figure 5.5 Plenum flange temporary cover
Temporary Cover
(1)
¼-20 x ½ inch Self-Thread Rolling Screws
(2)
Figure 5.6 Access cover hardware
3/8-16 x 1 inch Carriage Bolts
(1)
Exhaust Plenum Access Cover
(2)
#10-32 x ¼ inch Access Cover Mounting Screws
(3)
38
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