Final Installation and Power Up
17
Chapter 5
Final Installation and Power Up
It’s a good idea to look over the entire installation before applying power to the system.
1:
Clean out dust and debris from the interior.
2:
Check for loose connections, bare wires and damaged insulation.
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
ohms or higher.
• Phase to ground resistance should be 10M ohms or higher.
• Neutral to ground resistance should be 0 ohms.
• Phase to neutral resistance should be 10M ohms 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.
1:
Seal all conduit access holes.
2:
Completely cover all conduit openings with fish paper and UL/cUL approved filler.
3:
Seal any air gaps caused by bent access panels.
4:
Fill in any gaps inside partially filled wiring conduit.
5:
Fill in other gaps or holes in the cabinet created during installation.
6:
Any enclosures that are installed side-by-side (bolted together) should only have minimal airflow
between them.
WARNING:
RISK OF ELECTRIC SHOCK! Auxiliary enclosures installed without an accessible
power disconnect device cannot be serviced or operated safely. Follow all
local codes and restrictions.
WARNING:
RISK OF ELECTRIC SHOCK! Failure to disconnect all power to the panel before
working inside could result in serious injury or death.
De-energize main feed to the dimmer rack and follow appropriate Lockout/
Tagout procedures as mandated by NFPA 70E. It is important to note that
electrical equipment such as dimmer racks can present an arc flash hazard if
improperly serviced. This is due to the high amounts of short-circuit current
available on the electrical supply to this equipment. Any work must comply
with OSHA Safe Working Practices.
CAUTION:
Air leaks can cause DRd enclosures to overheat during operation and shut
down. Air leaks can also cause a shut down to do an “Airflow Error”, meaning
that too little air is flowing through the front of the enclosure where it is
needed to cool the dimmers.
