User manual

Electrical Connections

83 Liebert

™

Figure 65 Disconnecting EMC filter for operation with Delta-connected power size C & D inverters

Remove EMC Filter for Delta-Connected Power for Type 2 inverters

The EMC filter on the VSD must be disconnected if the Liebert VSD control DS unit will be operated

with Delta-connected power.

1. Disconnect the power supply before working on the unit.

2. Locate the VSD (refer to Figure 1 for the drive’s location on downflow units; see Figure 2 for the

location on upflow units).

3. Remove inverter assembly. Follow instructions in 13.2.4 - Electronic Variable Speed Drive -

Inverter.

4. Loosen and remove the screws as shown (#1 in Figure 66) and (#2 in Figure 66).

5. Remove filter (#3 in Figure 66).

6. Reinsert and tighten the screws removed in Step 4.

Figure 66 Figure bb Disconnecting EMC filter for operation with Delta-connected power Type 2 inverters

NOTE

This procedure requires substantial work.

Tab fully inserted:

EMC filter fitted

Tab fully extended:

EMC filter disconnected

DPN001946

Rev. 0

Internal

EMC filter

Internal

EMC filter

DPN001947

Rev. 0