ETC Unison ERn Wall-mount Control Enclosure - Manual (Page 28)

24 Unison ® ERn Wall Mount Enclosure Installation Manual
Completing the Installation
It’s a good idea to look over the entire installation before applying power to the enclosure.
• Clean out dust and debris from the enclosure interior.
• Check for loose connections, bare wires, and damaged insulation. Repair any damage
that is discovered.
Check Main Power Wiring
Check resistance between line, neutral, and ground busses with a digital voltmeter (DVM).
• Line to ground resistance should be 10M Ohm or higher.
• Neutral to ground resistance should be 0 Ohm.
• Line to neutral resistance should be 10M Ohm or higher.
• Re-install the rack power supply into the top slot of the ERn enclosure.
Check Line Voltages
Check the voltage on your input terminals using a digital volt meter (DVM) before installing
modules.
• HIGH LEAKAGE CURRENT
• Ground connection is essential before connecting supply
• Disconnect power before removing modules
• Service by authorized persons only.
Step 1: Close the ERn door.
Step 2: Apply line power at the main circuit breaker for 90 seconds. Observe the
enclosure for evidence of shorting, like arcing sounds or a burning smell. If you
detect evidence of shorting, shut off power and fix the wiring.
W A R N I N G : Power must be turned OFF when you perform this procedure. ETC
recommends that your facility adopts a lockout / tagout procedure to protect
your maintenance personnel during maintenance procedures.
W A R N I N G : Line voltages will be on the input terminals during this procedure. You must
be a qualified electrician familiar with the hazards of working with high
voltage electricity. Use extreme caution when performing this procedure.
ERn door removed from graphic for
clarity of rack power Supply
installation.