ETC Unison DRd Dimming Rack Enclosure - Manual (Page 19)

2
Install Enclosures 15
Mounting Auxiliary and DRd Enclosures Together
Unison DRd and AX auxiliary enclosures are designed to be surface mounted on load
bearing walls in an electrical closet or a room with restricted public access. One DRd
enclosure may be bussed to the AX series auxiliary enclosure, which may contain a main
circuit breaker or a main lug for power distribution to the adjacent DRd12 enclosure. Two
DRd12 enclosures may be cross-bussed to an AX12X auxiliary enclosure which is
designed to provide main lug or main breaker input feed termination to the adjacent DRd12
enclosures.
The wall must be strong enough to hold all enclosures fully populated with modules, conduit
and wire. Reference “Where to Install the Enclosure,” page 7 for weight, dimension and
clearance requirements.
Step 1: Determine where the enclosures will be installed using the weight and dimension
requirements detailed in “Where to Install the Enclosure,” page 7 .
Step 2: Use the measured slot dimensions located in the graphics below to mark the hole
locations for the mounting hardware.
Step 3: Drill the holes and install the mounting hardware for each enclosure.
• Four 3/8” (M8-M10) bolts or screws 2-4” (50-100mm) long, and suitable
wall plugs are suggested mounting hardware per enclosure (lag bolts
recommended).
• Both the surface and the mounting hardware must support the weight of
the enclosures fully populated with modules.
• Expose at least 1” (25mm) of threads for mounting the enclosure.
Step 4: Remove the conduit knockouts from the mating side conduit plugs on the DRd
and auxiliary enclosures before installation. Only remove the knockouts that are
adjacent to another enclosure.
Step 5: Install one DRd enclosure first (follow instructions as outlined in “Mounting
Individual Enclosures on a Wall,” on page 13 . Remember to install the DRd
enclosure to either side of the auxiliary enclosure in cross-bussed applications.
Step 6: Align the auxiliary enclosure against the DRd enclosure and mount it to the
previously installed hardware. Keyholes in the DRd and auxiliary enclosures are
aligned with each other for mounting to Unistrut or Kindorf. With conduit holes
mated, the bolt spacings are on 16” (406mm) centers (top left DRd and top left
432mm
17”
451mm
17.75”
194mm
7.64”
113mm
4.45”
160mm
6.3”
432mm
17”
62mm
2.44”
787mm
31”
406mm
16”
406mm
16”
330mm
13”
559mm
22”
559mm
22”
DRd12-48 rear panel view