Important Safety Instructions - Vertiv Liebert PFD Installer/User Manual

1 IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS
This manual contains important safety instructions that should be followed during the installation and
maintenance of the Liebert® PFD. Read this manual thoroughly before attempting to install or operate
this unit.
Only qualified personnel should move, install or service this equipment.
Adhere to all warnings, cautions, notices and installation, operating and safety instructions on the unit
and in this manual. Follow all installation, operation and maintenance instructions and all applicable
national and local building, electrical and plumbing codes.
WARNING! Arc flash and electric shock hazard. Open all local and remote electric power-supply
disconnect switches, verify with a voltmeter that power is Off and wear appropriate,
OSHA-approved personal protective equipment (PPE) per NFPA 70E before working within the
electric control enclosure. Failure to comply can cause serious injury or death. Customer must
provide earth ground to unit, per NEC, CEC and local codes, as applicable. 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® controller 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 controller. The only way to ensure
that there is NO voltage inside the unit is to install and open a remote disconnect switch. Refer
to unit electrical schematic. Follow all local codes.
WARNING! Risk of over-pressurization of the refrigeration system. Can cause explosive
discharge of high-pressure refrigerant, loss of refrigerant, environmental pollution, equipment
damage, injury, or death. This unit contains fluids and gases under high pressure. Use extreme
caution when charging the refrigerant system. Do not pressurize the system higher than the
design pressure marked on the unit's nameplate. Relieve pressure before cutting into or
making connections/disconnections to the piping system.
Do not close off any field-installed, refrigerant-line isolation valves for repairs unless a
pressure-relief valve is field- installed in the line between the isolation valve and the check valve.
The pressure-relief valve must be rated 5% to 10% higher than the system-design pressure. An
increase in ambient temperature can cause the pressure of the isolated refrigerant to rise and
exceed the system-design pressure rating (marked on the unit nameplate).
WARNING! Risk of contact with high-speed, rotating fan impeller blades. Can cause injury or
death. Open all local and remote electric power-supply disconnect switches, verify with a
voltmeter that power is off, and verify that all fan impellers have stopped rotating before
working in the unit cabinet.
WARNING! Risk of electric shock. Can cause serious injury or death. 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. Open all local and remote electric power disconnect switches and verify with a
voltmeter that power is Off before working on any component of the system.
CAUTION: Risk of contact with sharp edges, splinters, and exposed fasteners. Can cause
injury. Only properly trained and qualified personnel wearing appropriate, OSHA-approved PPE
should attempt to move, lift, remove packaging from or prepare the unit for installation.
1 Important Safety Instructions 5