Emerson Liebert CRV 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 C R 0 2 0 R A 1 C 7 S D 1 8 1 1 E L 1 0 P A - Manual (Page 10)

Important Safety Instructions
Liebert ® CRV ™ 2
NOTICE
Risk of overhead interference. Can cause unit and/or building damage.
The unit may be too tall to fit through a doorway while on the skid. Measure the unit and
doorway heights and refer to the installation plans prior to moving the unit to verify
clearances.
NOTICE
Risk of improper storage, Can cause unit damage.
Keep the unit upright, indoors and protected from dampness, freezing temperatures and
contact damage.
!
WARNING
Arc flash and electric shock hazard. Can cause injury and death.
Disconnect local and remote power supplies and wear appropriate personal protective
equipment per NFPA 70E 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 hazardous voltage potential.
Install and open a remote disconnect switch and verify with a voltmeter that live hazardous
voltage potential is not present inside the unit cabinet before working within. Refer to the
unit electrical schematic.
Follow all national and local codes.
!
WARNING
Risk of refrigerant system rupture or explosion from overpressurization. Can cause
equipment damage, injury and death.
A pressure relief valve is required for compliance with the EU Pressure Equipment Directive
and may be required for compliance with local codes. If a discharge pressure relief device is
not provided with the condenser unit, the system installer must install one in the high side of
the refrigerant circuit and rated for a maximum of:
• 675psig (46.5bar) for water/glycol-cooled units
• 700psig (48.3bar) for air-cooled units
A shutoff valve must not be installed 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.
!
WARNING
Risk of top-heavy unit falling over. Can cause equipment damage, personal injury and death.
Read all of the following instructions before attempting to move, lift or remove packaging
from the Liebert CRV.
!
CAUTION
Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,
shoes and glasses should attempt to move, lift or remove packaging from the Liebert CRV or
prepare the unit for installation.