Unit installation

2
!
WARNING
Risk of electrical shock. Can cause injury and death.
Disconnect local and remote power supplies before working within.
Before proceeding with installation, read all instructions, verify that all the parts are included
and check the nameplate to be sure the voltage matches available utility power.
The Liebert iCOM
®
microprocessor does not isolate power from the unit, even in the Unit Off
mode.
Some internal components require and receive power even during the Unit Off mode of the
Liebert iCOM control.
The factory-supplied optional disconnect switch is inside the unit. The line side of this switch
contains live high voltage.
The only way to ensure that there is NO voltage inside the unit is to install and open a remote
disconnect switch. Refer to the unit electrical schematic.
Follow all local codes.
!
WARNING
Risk of refrigerant system rupture or explosion from overpressurization. Can cause
equipment damage, injury and death.
If a pressure relief device is not provided with the condenser unit, the system installer must
provide and install a discharge pressure relief valve rated for a maximum of 609psig (42bar)
in the high-side refrigerant circuit. Do not install a shutoff valve between the compressor and
the field-installed relief valve.
One or more additional pressure relief valves are required downstream of any and all
field-installed isolation. Do not isolate any refrigerant circuits from overpressurization
protection.