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Electrical Connections
71 Liebert
®
SRC™ User Manual
6.0 Electrical Connections
!
WARNING
Arc flash and electric shock hazard. Can cause serious injury or death. Open all local and remote
electric power disconnect switches, verify with a voltmeter that power is off and wear personal
protective equipment per NFPA 70E before working within the
electric control enclosure.
• All electric wiring and communication cable work must be performed by a licensed electrician
and conform to all applicable national, state and local electrical codes and the instructions in this
manual.
• Undersized wiring may lead to unacceptab
le voltage at the unit and may cause unit malfunction
and be a fire hazard.
• Properly ground the Liebert SRC indoor and outdoor unit. Ground wiring is required to prevent
accidental electrical shock during current leakage.
•Ground wiring must always
be installed by a qualified technician.
• Do not connect ground wire to refrigerant, gas or water piping, to lightning rods, to telephone
ground wiring, or to the building plumbing system. Failure to properly provide a National
Electrical Code-approved
earth ground can result in electric shock, physical injury or death.
•Install properly-sized breakers/fuses/overcurrent-protection switches and wiring in accordance
with local, state, and National Electrical Code regulations related to electrical equipment and
wiring, and foll
owing the instructions in this manual. Using an oversized breaker or fuse may
result in electric shock, physical injury or death.
• Replace and securely fasten all control box and panel covers immediately after working on the
unit to protect the operator from
the hazards above.
NOTE
• Consider ambient conditions (temperature, direct sunlight, inclement
weather, etc.) when selecting, installing, and connecting the power wiring.
• Properly ground the indoor and outdoor unit. Improperly installed ground
wire can cause communication problems from electrical noise and motor-
current leakage. Ground wiring must always be installed by a qualified
technician.
• If the system operates in reversed phase, it may damage the compressors
or other components.
• If there is a possibility of reversed phase, phase loss, momentary blackout,
or the power goes on and off while the system is operating, install a field-
supplied phase-loss protection circuit.
• Do not connect ground wire to refrigerant, gas or water piping, to lightning
rods, to telephone ground wiring, or to the building plumbing system.
Failure to properly provide a National Electric Code-approved earth ground
can result in property damage and equipment malfunction.
• Install appropriately-sized breakers/fuses/overcurrent-protections switches
and wiring in accordance with local, state, and National Electric Code
regulations related to electrical equipment and wiring, and following the
instructions in this manual. Using an oversized breaker or fuse may result
in equipment malfunction and property damage.
MFL67502030 17. 7. 13. 오오 3:05 Page 81
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