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Electrical Connections
Liebert
®
SRC
™
27launaM resU
6.1 Power-supply/Power-wiring Specifications
• Liebert SRC systems operate at 1 , 208 – 230 V, 60 Hz.Ø
• Power-supply wire type and size should be selected based on National Electrical Code and local
codes. Maximum allowable voltage fluctuation ±10% or nameplate rated value. Refer to Figure 6-1 for
wiring guidelines.
• Properly ground the indoor and outdoor unit per National Electrical Code and local codes.
• Use only copper wiring that is stranded and shielded with the wires separately insulated.
• Ground wire should be longer than the common power/communication wires.
• Refer to the appropriate circuit and terminal-block diagrams for your model unit.
• Always match color codes of each wire and follow wiring diagram.
Figure 6-1 Indoor and Outdoor wiring and communications cable diagram
Best practice dictates using ring or spade terminals to terminate power wiring at the power terminal block,
Figure 6-2.
Figure 6-2 Typical ring terminal
6/16” ± 2/16”
13/16”
GN/YL
Power Wiring, Ground
to Outdoor Unit
Power Wiring, Ground,
Communication Cable
From Outdoor Unit
To Indoor Unit
13/16”
GN/YL
Line Voltage
(208/230V)
GN/YL = (Green, Yellow)
6/16” ± 2/16”
For 9/12K Indoor Units: AWG 14
For 18K Indoor Units: AWG 12
For 9/12/18K Indoor Units: AWG 18
Ring Terminal
Power Wiring
MFL67502030 17. 7. 13. 오오 3:05 Page 82
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