Figure 64 Disconnecting Emc Filter For Operation With Delta-Connected Power Size C & D Inverters; Inverters - Emerson Liebert DS Series User Manual

Figure 64 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.
NOTE
This procedure requires substantial work.
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 65) and (#2 in Figure 65).
5. Remove filter (#3 in Figure 65).
6. Reinsert and tighten the screws removed in Step 4.
Figure 65 Figure bb Disconnecting EMC filter for operation with Delta-connected power Type 2 inverters
A
B
1
2
Internal
EMC filter
Tab fully inserted:
EMC filter fitted
Internal
EMC filter
Tab fully extended:
EMC filter disconnected
81
Electrical Connections
DPN001946
Rev. 0
4
3
DPN001947
Rev. 0