Emerson PFH020A-L, User Manual

Page: 12 / 117

Important Safety Instructions
5 Liebert
®
Mini-Mate2
™
I
MPORTANT
S
AFETY
I
NSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important safety instructions that should be followed during the installation
and maintenance of the Liebert Mini-Mate2. 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 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. Disconnect all electric power supplies and wear protective
equipment per NFPA 70E before working within 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 microprocessor control 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.
The line side of the disconnect switch on the front of the unit contains live hazardous voltage
potential.
The only way to ensure that there is NO voltage inside the unit is to install and open a remote
disconnect switch and check the internal power supply wires with a voltmeter. Refer to unit
electrical schematic. Follow all applicable national and local electric codes.
!
WARNING
Risk of explosive discharge from high-pressure refrigerant. Can cause injury or death.
This unit contains fluids and gases under high pressure. Relieve pressure before working with
piping.
!
WARNING
Risk of refrigerant system rupture or explosion from overpressurization. Can cause
equipment damage, injury or 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 per national and local codes in the high
side refrigerant circuit. Do not install a shutoff valve between the compressor and the field
installed relief valve. Do not isolate any refrigerant circuits from overpressurization
protection.
!
WARNING
Risk of high-speed moving parts. Can cause injury or death.
Open all local and remote electrical power disconnect switches before working within the unit
and component electrical enclosures.
!
CAUTION
Risk of contact with hot surfaces. Can cause injury.
The compressors, refrigerant discharge lines, humidifiers and reheats are extremely hot
during unit operation. Allow sufficient time for them to cool before working within the unit
cabinet. Use extreme caution and wear protective gloves and arm protection when working on
or near hot compressors, discharge lines, humidifiers and reheats.