Wire The Ec Fans; Ec-Fan Junction Boxes - Vertiv Liebert CW Series Installer And User Manual

6.2.4 Wire the EC Fans

WARNING! Risk of cut insulation and damaged wires. Can cause short circuits, overheated
wiring, smoke, fire, activation of fire suppression systems and EMS personnel, equipment
damage, loss of power to fans, injury or death. Verify that all wiring connections are tight and
that all wiring is contained within the junction box prior to closing and securing the cover.
Black-sleeved harness contains fan-control wires. Grey-sleeved harness contains motor high-volt connection.
1. Refer to Figure 7.14 below, Figure 7.15 on the facing page, and Figure 7.16 on page 60, to route the wire
harnesses and insert them into the indicated openings on the junction boxes.
• You may need to remove existing wire ties that hold the harness to the fan cage.
NOTE: Do not route the wiring over the handles on the EC-fan assembly.
2. Connect the wires inside the junction box:
• Between fan 1 and 2 on 2- and 3-fan units, refer to Figure 7.15 on the facing page.
• On single-fan or fan 3 of 3-fan units, refer to Figure 7.16 on page 60.
3. Use provided wire ties to secure the wire harnesses to the fan cage to prevent harness movement when fans are
running.
Figure 7.14 EC-fan junction boxes
58
Item Description
1 Junctionbox betweenfans1 and2 on 2- and 3-fanunit
2 Junctionbox for 1-or 3-fanunit
Vertiv | Liebert® CW™Installer/User Guide