Installation
6Liebert
®
InteleCool
®
2
2.5 Electrical Connections
Each unit is shipped from the factory with all internal wiring completed. Refer to the electrical
schematic when making connections. Electrical connections to be made at the installation site are:
line voltage power supply to the power input and control wiring to remote control (customer-supplied
or Emerson option).
2.5.1 Power Connections
All power and control wiring and ground connections must be in accordance with the National
Electrical Code and local codes.
Use copper wiring only. Make sure that all connections are tight.
Make sure that the voltage supplied agrees with the voltage specified on the unit nameplate. The
Liebert InteleCool2 comes standard with a factory-installed circuit breaker, accessible through an
external access panel. An external, wall-mounted power disconnect switch (field-supplied) may be
required for local codes. If necessary, this switch should be wired according to those codes.
For access to the electrical enclosure:
• Remove the screws securing the middle panel and pull the panel down and forward to remove.
• Remove the screws securing the electric box cover and remove cover.
• Verify that the unit wiring is correct for the actual input power. Some units are built with
multi-voltage serial tags. The transformer may need to be re-tapped if the actual input voltage is
different (see serial tag and electrical schematic).
Route the supply power to the customer-supplied disconnect switch (if required) and then to the unit
circuit breaker inside the unit. Route the conduit to the hole provided in the cabinet. Connect the
earth ground to the lug provided near the circuit breaker. Refer to the unit wiring diagram supplied
on the inside of the electrical enclosure cover.
WARNING
Risk of electric shock. Can cause injury and death.
Disconnect all local and remote electric power supplies before working within.
Use voltmeter to make sure power is turned off before making any electrical connections.
NOTE
Refer to electrical schematic when making connections.
NOTE
Do not run control wiring with high-voltage wiring. High-voltage can interfere with control
signals and cause poor or erratic equipment performance.
NOTE
The optional three-phase scroll compressor must rotate in the correct direction to ensure proper
system operation. Wiring must be phased and connected as shown:
• PHASE “A” to T1 or L1
• PHASE “B” to T2 or L2
• PHASE “C” to T3 or L3
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