Emerson Liebert MC Microchannel Outdoor Condenser 28 - 220kW User Manual
Electrical Connections
19
Liebert
®
MC
™
4.1
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
Line voltage electrical service is required for all condensers at the location of the condenser. The
voltage supply to the condenser may not be the same voltage supply as required by the indoor unit.
Consider using UPS equipment on both data center cooling units and Liebert MC condensers to
maintain uninterrupted cooling capability. Refer to the unit’s serial tag for specific condenser
electrical requirements. A unit disconnect is standard. However, a site disconnect may be required
per local code to isolate the unit for maintenance. Route the supply power to the site disconnect switch
and then to the unit. Route the conduit to the knockout provided in the bottom right end of the
electrical control enclosure. Connect the earth ground wire lead to the marked earth ground
connection terminal provided near the factory-installed disconnect switch (see Figure 16).
!
WARNING
Risk of electrical fire and short circuit. Can cause property damage, injury or death.
Select and install the line side electrical supply wire and overcurrent protection device(s)
Select and install the line side 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
Make sure all electrical connections are tight. Unit-specific wiring diagrams are provided on
each unit.
NOTE
The Liebert MC Condenser is designed to operate with Wye-connected power. It will not operate
The Liebert MC Condenser is designed to operate with Wye-connected power. It will not operate
properly with Delta-connected power. Refer to 4.1.1 - Wye vs. Delta Connection Power
NOTE
Liebert Lee-Temp
Liebert Lee-Temp
™
kits require a separate line voltage electrical supply for the heated receivers.
Table 4
Electrical data, three-phase, 60Hz condenser, Premium Version (EC control)
Model #
Number
of Fans
Power Requirements
FLA
WSA
OPD
208/230V 380/415V 460V 208/230V 380/415V 460V 208/230V 380/415V 460V
MCS028
1
3.0
1.4
1.4
3.8
1.8
1.8
15
15
15
MCM040
1
2.3
1.4
1.4
3.2
1.9
1.9
15
15
15
MCM080
2
4.6
2.8
2.8
5.5
3.3
3.3
15
15
15
MCM120
3
6.9
4.2
4.2
7.5
4.6
4.6
15
15
15
MCM160
4
9.2
5.6
5.6
9.8
6.0
6.0
15
15
15
MCL055
1
5.7
2.8
2.8
7.1
3.5
3.5
15
15
15
MCL110
2
11.4
5.6
5.6
12.8
6.3
6.3
15
15
15
MCL165
3
17.1
8.4
8.4
18.5
9.1
9.1
20
15
15
MCL220
4
22.8
11.2
11.2
24.2
11.9
11.9
25
15
15
1.
FLA = Full Load Amps; WSA = Wire Size Amps; OPD = Maximum Overcurrent Protection Device.
2.
208V–460V premium models must be connected to Wye 3-phase systems.