Final installation and power up, Check main power wiring, Sealing enclosure air leaks – ETC Unison Auxiliary Enclosure Series User Manual
Page 21: See “sealing enclosure air leaks” on
5
Final Installation and Power Up
18
C h a p t e r 5
Final Installation and Power Up
It’s a good idea to look over the entire installation before applying power to the system.
Step 1:
Clean out dust and debris from the interior.
Step 2:
Check for loose connections, bare wires and damaged insulation.
Step 3:
Check for and stop air leaks left in conduit openings, empty screw holes or
misaligned panels. For complete instructions for this procedure reference
below.
Check Main Power Wiring
With all modules removed and the power harness to all dimming engines unplugged, check
resistance between phases, neutral and ground busses with a digital voltmeter (DVM).
•
Phase to phase resistance should be 10M Ohm or higher.
•
Phase to ground resistance should be 10M Ohm or higher.
•
Neutral to ground resistance should be 0 Ohm.
•
Phase to neutral resistance should be 10M Ohm or higher.
Sealing Enclosure Air Leaks
After you have attached all the conduit to the enclosure(s) and connected all wiring, you
must seal any air leaks created during the installation process. Use UL/cUL approved filler.
Step 1:
Seal all conduit access holes.
Step 2:
Completely cover all conduit openings with fish paper and UL/cUL approved
filler.
Step 3:
Seal any air gaps caused by bent access panels.
Step 4:
Fill in any gaps inside partially filled wiring conduit.
Step 5:
Fill in other gaps or holes in the cabinet created during installation.
W A R N I N G :
Power must be turned OFF when you perform this procedure.
N o t e :
Before removing dimmer or control modules for service, de-energize the main
feed to the dimmer rack and follow appropriate Lockout and Tagout procedures
as described in NFPA Standard 70E. It is important to note that electrical
equipment such as dimmer enclosures can present an arc flash safety hazard if
improperly serviced. This is due to available large Short Circuit Currents on the
feeders of the equipment. Any work on energized equipment must comply with
OSHA Electrical Safe Working Practices.