And apparently fire. I wasn’t going to chime in but one of my providers *just* alerted us to an electrical fire in a Minneapolis pop causing loads to failover to ups. Unknown whether weather conditions contributed to the incident. PZ
On Wed, Jan 30, 2019 at 09:25 Naslund, Steve <snasl...@medline.com> wrote: > >To the 'infrastructure' question, I think the biggest concerns would >be > power related. Although we have a DC in Buffalo that is cooled >on > ambient outside air that has the opposite problem ; it's TOO cold >at the > moment, so we are cycling most of the hot server exhaust >back into the > computer rooms to maintain temperatures. > > > > Exactly what he said. We actually run cooling and supplemental heating in > extreme cold. We need to keep the chiller pulling heat into itself and > pumps moving on high to keep the outdoor components from freezing up. > During the summer you might run close to or slightly below freezing on the > coolant loops but in these conditions you cannot run that low a temp > because things will freeze up before the coolant returns. We also have to > keep the room reasonably warm (50F +). You also need to watch out for fast > temp excursions to keep humidity under control. > > > > The wind speed does make some difference since it is like a fan on your > evaporator pulling heat out of the cooling loops faster than still air will. > > > > Steven Naslund > > Chicago IL > -- PZ Head of Datacenter and Network Infrastructure, Wish p...@wish.com +1-650-313-3458