York VSD 292 - Page 23

Figure 4: OptiSpeed system architecture (Model VSD 351 without harmonic filter shown,
similar to 270, 292, 424 models)
Callout Description
1 Cooling fans
2 Cooling coil
3 Gate driver board
4 IGBT
5 DC bus isolator board
6 SCR trigger board
7 SCR/Diode module
23Liquid-Cooled OptiSpeed Compressor Speed Drive