Liebert Extreme Density Chiller XDC - Manual (Page 19)

Product Description
13
Figure 15 50Hz models high voltage connections—secondary disconnect switch
1.6 Extra Low Voltage Connections
Extra Low Voltage (ELV) power output is 30V and 100VA or less.
1. Turn off all unit power before connecting cables or wires. Failure to do so may damage this
equipment.
2. Route low voltage electrical connections through the appropriate knockouts as shown in
Figure 17.
3. User interface and temperature/humidity sensor wire is NEC Class 2. All electrical installation
must comply with all national, state and local requirements.
Figure 16 Liebert XDC heat rejection connection points
Busbar
Power Connection
From Primary
Power Block
Pump Circuit
Breakers
Pump Contactors
Ground Lug Secondary
Disconnect
Switch
Transformer 1
Power Block
Transformer 2
Fuse Blocks
Electrical handy box,
factory-installed with cover
HEAT REJECTION CONNECTION
Field-supplied 24V. Class 1 wiring
to interlock heat rejection from pigtails:
70A and 71A - Compressor 1 circuit
70B and 71B - Compressor 2 circuit
70C and 71C - Dual Source relay (optional)