Liebert Air Cooled - Manual (Page 22)

Inspection and Installation
18
3.6 Electrical Supply Preparation
Line voltage electrical service is required for all models. Refer to equipment nameplate regarding
wire size and circuit protection requirements. Electrical service must conform to national and local
electrical codes. Refer to Figures 19, 20 and 21 for electrical service entrances into unit. Refer to
electrical schematic when making connections.
Each unit is shipped from the factory with all internal unit wiring completed.
Each unit is shipped from the factory with all internal unit wiring completed. Refer to the electrical
schematic supplied with the condenser when making line voltage supply, low voltage indoor unit
interlock and any low voltage alarm connections. All wiring must be done in accordance with all appli-
cable local, state and national electrical codes.
3.6.1 Line Voltage Wiring
Condenser-rated voltage should be verified with available power supply before installation. Refer to
the unit’s electrical schematic and serial tag for specific electrical requirements.
Line voltage electrical service is required for all condensers at the location of the condenser. The
power supply does not necessarily have to be the same voltage supply as required by the indoor unit
connected to the condenser. See the unit’s serial tag for specific condenser electrical requirements. A
unit disconnect is standard on VFD and Quiet-Line Condensers and is optional on Fan Speed Control
and standard Lee-Temp condensers. However, a site disconnect may be required per local code to iso-
late the unit for maintenance. Route the supply power to the site disconnect switch and then to the
unit. Route the conduit through the hole provided in the cabinet. Connect earth ground to lug pro-
vided near terminal board.
!
WARNING
Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electrical power supplies before working within the electrical
enclosure.
The line side of the disconnect remains energized when the disconnect is Off.
Use a voltmeter to verify that the electrical power is Off before performing any electrical
and/or mechanical service and/or maintenance operations.
!
WARNING
Risk of high speed moving parts. Can cause injury or death.
The fan(s) blades can start to rotate unexpectedly when the power is On. Disconnect all local
and remote electrical power supplies before working within the fan compartment.
Use a voltmeter to verify that the electrical power is Off before performing any electrical
and/or mechanical service and/or maintenance operations.
!
WARNING
Risk electrical fire and short circuit. Can cause property damage, injury or death.
Select and install the electrical supply wire and overcurrent protection device(s) according to
the specifications on the unit nameplate(s), per the instructions in this manual and according
to the applicable national, state and local code requirements. Use copper conductors only.
Make sure all electrical connections are tight. Unit-specific wiring diagrams are provided on
each unit.
NOTE
Lee-Temp and Quiet-Line Condensers require a separate line voltage electrical supply for the
heated receivers. See Table 8 for power requirements.