Have to rephrase what i said about the Liebert units being water cooled. They used water for humidity control not for cooling. They used regular refrigerant for that.
Wayne > On May 22, 2019, at 1:50 AM, Wayne S <[email protected]> wrote: > > PS.. Sorry about the top posting. I'm old and i forgot. > > > Wayne > > >> On May 22, 2019, at 1:45 AM, Wayne S <[email protected]> wrote: >> >> All true. Just sayin' that water can get into the DC even when it's not >> intended. >> When fighting a fire in another part of a structure, the water may find it's >> way into the DC. >> >> Not sure about not allowing water to get near a dc, can you explain that >> statement? >> The 2 Liebert a/c units that cooled the DC were located inside the room and >> were water cooled so there was water around. I also remember the old IBM >> 3032 computers at my first site needed chilled water to operate so there was >> a lot of piped water going into the room. >> >> The FD did regular inspections and it didn't seem to bother them in either >> case. >> Funny, but Halon is outlawed and having it around did seem to bother them. >> It was replaced with some other gas system that i can't remember the name. >> >> >> >>> On May 22, 2019, at 12:43 AM, Jim Manley via cctalk <[email protected]> >>> wrote: >>> >>> No firefighter in their right mind is going to knowingly pump a drop of >>> water anywhere near or in the direction of a data center, let alone into >>> it. That's why they're equipped with Halon or other oxygen displacement, >>> cooling, and flame suppression systems, and the FDs are equipped with >>> appropriate Class 2 (Electrical) firefighting equipment. FDs conduct >>> periodic inspections of all on-site fire-fighting equipment and the local >>> station shifts do walk-throughs to review their procedures. If any >>> hazardous materials are present (guaranteed in a DC), they're also taken >>> into account. >>> >>> The FDs that serve industrial sites are equipped to fight fires where the >>> fuels can range from paper through plastics, up to actual petrochemical >>> fuels. I worked in the last semiconductor fab still operating in Silicon >>> Valley and worked with the City of Santa Clara FD on their plans, which had >>> to deal with the presence of extreme toxins and corrosives such as >>> hydrofluoric acid used to etch silicon wafers. They used to be responsible >>> for the Intel fab next door until it was shut down and the fab in >>> Hillsboro, OR, took over all R&D production. They said it was a nightmare >>> waiting to happen because of the volume of extremely hazardous chemicals >>> used on-site. >>> >>> Someone should be sued and go to prison for signing off on permits that >>> would allow water to get anywhere near a DC - it's a violation of the >>> National Electric Code, for starters. If anyone sees something like that, >>> it should be reported immediately, and not within the organization, since >>> the facilities people are either incompetent or complicit in keeping quiet >>> about it. That's what anonymous.hotlines are for, and the media, if no >>> action occurs with the hotlines - we're talking about the possibility of >>> serious injury and death here. >>> >>> >>> On Tue, May 21, 2019 at 11:12 PM Grant Taylor via cctalk < >>> [email protected]> wrote: >>> >>>>> On 5/21/19 5:33 PM, Craig Ruff via cctech wrote: >>>>> The NCAR Wyoming Supercomputer Center has raised floors of about 20 feet. >>>> >>>> Did the support posts go all the way down? Or was there some sort of >>>> grid work that supported the raised floor above an open area that >>>> contained the PDUs? >>>> >>>> I ask because the PDUs in the DC in my office are wider (and longer) >>>> than a floor tile. As such, it would require some special >>>> accommodations if the support posts were 20 feet tall. >>>> >>>> >>>> >>>> -- >>>> Grant. . . . >>>> unix || die >>>>
