3Com LS8M1P12TEH Installation Manual page 211

Installation Manual
H3C S7500 Series Ethernet Switches
Prior to installation, clean dust inside and outside the holes with a dust collector and
then measure the spacing of holes. If errors are not acceptable, you must position and
drill the holes again.
Take down the expansion tube and expansion nut, and insert the alignment rib on the
expansion nut into the alignment groove of expansion tube. Punch the expansion tube
with rubber hammer until the expansion tube is completely buried in the floor.
Figure B-12 illustrates how to install an expansion nut onto an expansion tube.
1
2
3
4
(1) Expansion tube
(3) Expansion nut
Figure B-12 Install an expansion nut onto an expansion tube
Caution:
You must insert the alignment rib of expansion nuts into the alignment grooves of
expansion tubes first; otherwise you will be unable to install or fasten the expansion
bolts.
II. Leveling the cabinets
1) Put the cabinets in position.
Install the cabinets in the planned position and align four feet of the cabinet with four
foot marks on the floor, and then align all the cabinets.
2) Level the cabinets.
Loosen the nuts used for fastening cabinets, and then place a horizontal ruler in the two
orthogonal directions on the top of the cabinets to check levelness. If any cabinet is out
of levelness, adjust the levelness by turning screws on feet with a wrench, and align all
the cabinets, as shown in Figure B-13.
Appendix B N68 Cabinet Installation
(2) Alignment groove
(4) Alignment rib
B-13