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SECTION 1 INSTALLATION
The ASCO 7000 Series Automatic Transfer &
Bypass–Isolation Switch (ATB) consists of an upper
bypass–isolation switch, a lower transfer switch, a
monitoring and transfer controller, and door–mounted
controls. The ATB is factory wired and tested.
Installation requires removal of the shipping skid then
securing the enclosure to the supporting foundatio n.
Remove the Shipping Skid
Open the front lower door and remove the two front
lag screws securing t he enclosure to the wood skid.
Next remove the rear lower panel and remove the two
rear lag screws securi ng t he enclosure to the wood skid.
Supporting Foundation
The supporting foundation for the enclosure must be
level and straight. Allow at least 35 inches in front of
the enclosure for draw out of the Transfer Switch.
Refer to the enclosure outline drawing included with
the ATB for all mounting details including door
opening space.
If bottom cable entry is used, the foundation must be
prepared so that the conduit stubs are located
correctly. Refe r to the appropriate enclosure outline
drawing for specified cable entrance area and location.
Provide cable bending space and clearance to live metal
parts. When a concrete floor is poured, use
interlocking conduit spacer caps or a wood or metal
template to maintain proper conduit alignment.
Mounting
Refer to the enclosure outline drawing furnished with
this switch and mount the 7000 Series ATB according
to the details and instructions shown on the drawing.
Remove Shipping Bracke ts / Angles
from the Transfer Switch
Open the lower front door(s). The Transfer Switch
carr iag e is secu red to the fram e for shipment. Remove
the three or four shipping brackets or L–angles (1 upper
left, 1 upper right, 1 lower right, or 2 lower on 4000 A).
To prevent serious damage, remove 3 shipping
angles from the transfer switch carriage. Do not
turn the Isolation Handle until they are removed!
remove 3 or 4 shipping brackets ( L–angles)
Figure 1-1. On 1000–3000 A remove three shipping
L–angles.
remove 2 lower
shipping brackets
remove 2 upper shipping brackets
Figure 1-2. 4000 A remove four shipping L–angles.