Emerson Liebert DS Precision Cooling System 28-105kW User Manual

Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power supplies before working within.
The Liebert Air Economizer must be connected by a licensed and qualified electrician only. 

Ensure that the Liebert Air Economizer cooling unit are electrically isolated for the duration 

of the connection operation and are secured against unauthorized startup

Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power supplies before working within. Prior to 

beginning installation, shut down the cooling unit, disconnect it from input power and secure 

it against unauthorized startup.

Risk of sharp edges and heavy parts. May cause personal injury or equipment damage.
Wear gloves to prevent injury to hands.
Damage to wiring or components can make unit unsafe to operate.
Use caution when installing wiring to prevent damage to factory wiring.
Install protective bushings in wiring knockouts as required
Do not disturb factory wiring or route field-installed wiring over electrical terminals.
Use NEC Class 1 wiring for all hazardous voltage electrical power supplies.
Check and retighten all wiring connections before starting the unit.