1000 Ton CHiller with VSD...
1000 Ton CHiller with VSD...
(OP)
I was wondering if anyone else has had any problems with a York Chiller after adding a VSD onto it. Around 6 or 7 years ago, the unit was entirely rebuilt and had a VSD added onto it to increase the units efficiency. Before this, the Chiller ran fine without any problems, however ever since the VSD was installed it's had multiple oil pump failures, some electrical issues, and parts (example being the thrust bearing) seem to be wearing much faster then originally expected.
Has anyone else had any similar problems? or is this just a freak incident? Maintence issues may also be a possibility...but I want to assume that isn't it for the time being. Any sort of ideas or suggestions would be helpful. Thanks.
Has anyone else had any similar problems? or is this just a freak incident? Maintence issues may also be a possibility...but I want to assume that isn't it for the time being. Any sort of ideas or suggestions would be helpful. Thanks.





RE: 1000 Ton CHiller with VSD...
This was a 4160V unit in which they added a 4160/460v transformer. An older 1000 ton YK running on R22.
RE: 1000 Ton CHiller with VSD...
Most of the drives I've seen coming out of the factory seem to be performing quite well. A few have had drive/electonic issues, but all were covered under warrenty.
The biggest concern is the surging brought about by running at reduced load and trying to maintain 75-80 degree condenser water, that needs to be dropped to 60-65 degrees at least.
I'm not a real engineer, but I play one on T.V.
A.J. Gest, York Int./JCI
RE: 1000 Ton CHiller with VSD...
I'm hoping the pumps(very important) and fans in the AHUs are variable speed too