ETC Unison DRd Dimming Rack Enclosure - Manual (Page 23)

3
Rough-in Conduit and Wiring 19
b: For the ribbon cable connected on the right rear side, release the tabs on
either side of the connector by sliding them opposite the connector then
gently pull the cable free. Temporarily secure this cable out of the way while
pulling conductors into the enclosure.
c: For the two-wire cable on the right side, gently pull the connector straight out.
Step 5: Remove the power supply access panel.
a: Align the panel perpendicular to the enclosure.
b: Slide the panel up approximately one inch to align the guide pins on the top
of the guided slots.
c: Then pull the panel straight out.
Modify Phase Bus for 120V AC Split Phase Operation
The DRd can be simply field modified from a three phase operation to a split phase (3 wire
plus ground) operation.
Step 1: Notice the two copper straps (stacked) on phase L2.
Step 2: Change the DRd operation from 3Ø to split phase by moving the copper straps,
strapping the phase bars together, (reference the graphic above to follow along).
a: Move one of the copper straps to connect between phase 1 (L1) and phase
2 (L2). The screws required are installed to the phase bars in the location the
copper strap will be mounted.
N o t e : Store this access panel in a safe place until you are finished roughing in conduit
and terminations. You will need to reinstall this panel when then enclosure is
installed and all wires have been terminated.
L1
L2
L3
N
L1
L2
L3
Step 1:
Step 2a:
Step 2b:
The enclosure door
has been removed
from this graphic for
clarity of this
procedure.