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IB140036EN
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Instruction Booklet
Effective: October 2014
Page
15
O&M Manual for 40-1200A (480/600 Vac) ATC-900 3-Position,
Open/Closed Transition Contactor Based Transfer Switch
With the enclosed ATS equipment unpacked and ready for
mounting, proceed with the following steps.
Step 1:
Install the required upper and lower mounting bolt
anchors and the two upper mounting bolts in the mount-
ing surface.
Step 2:
Gently lift the enclosure, if desired to be off the floor,
and guide the teardrop holes in the upper mounting
flange over the upper mounting bolts. Do not com-
pletely tighten the bolts at this time. If sitting on the
floor, install the bolts without lifting.
Step 3:
While still supporting the enclosure, install the two
lower mounting bolts in the lower mounting flange.
Again, do not completely tighten the bolts at this time.
Use shims, if required, to prevent deformation of the
enclosure if the mounting surface is distorted.
Step 4:
Tighten all four mounting bolts after any required shim-
ming is completed.
Figure 11A. Typical Mounting of the ATS to a Mounting Surface
(Open Transition ATS) for Wall Mounting.
Step 5:
Double check to ensure that all packing and shipping
materials have been removed.
Step 6:
If Seismic Uniform Building Code (UBC) is required,
secure with (4) 5/16-13 UNC grade 5 or better head
bolts and washers
4.4 Mounting Procedure (Close Transition Transfer
Switch)
With the enclosed transfer switch equipment unpacked and
ready for mounting, proceed with the following steps:
Step 1:
Mounting and cabling access is best provided by remov-
ing side and rear covers (when applicable).
Step 2:
Gently maneuver the switch into its location using all of
the supplied lift brackets.
Step 3:
Bolt the enclosure to the base. Use separate seismic
washers (Option 42 only) if Seismic Uniform Building
Code (UBC) Zone 4 certification is desired (Figure 11B),
and secure with 1/2-13 UNC Grade 5 hex bolts.
Step 4:
Tighten bolts to 50 ft-lbs (68 Nm).
Step 5:
Double check to ensure that all packing and shipping
material has been removed
.
Figure 11B. Seismic Tested and Approved Product Mounting
Instructions for Floor Mounting.
NOTICE
CABLE ENTRY HOLES ARE NOT PART OF THE ENCLOSURE WHEN
SHIPPED FROM THE FACTORY AND MUST BE PROVIDED IN THE
FIELD, EITHER BEFORE OR AFTER MOUNTING THE ENCLOSURE.