So this has been discussed in our office for the past two day or so, and I wanted to get some more opinions.
Why is the industry standard (at least in the Mid-Atlantic region) to get OS&Y tamper switches with two sets of contacts? The only time any of our sprinkler installers can remember needing it was for an old system where they needed the second contact to do some oddball other system shutdown. Our alarm division installers have never wired the second set of contacts to anything that they can remember. The best guess they could come up with was if you had a two tenant building with a single feed and both tenants wanted to monitor the tamper switches. And, the second set of contacts costs about $25 more. None of our suppliers stock the single switch version, so they have to be ordered direct from the manufacturer. Now, this isn't a huge problem since we use butterfly valves wherever possible, but when you have a fire pump, or a water purveyor who requires OS&Y valves, you've got to use them. The best (worst?) answer that one of the owners here could come up with was better to have it and not need it, than need it and not have it. All the designers and project managers at our company (myself included) just remember being taught this way... IE, you always order the OSYSU-2, and that's the way we've always done it. I know there's got to be somebody on the sprinkler forums who knows the reason why this is, or how this came about, right? Has anyone else thought about this, or tried to order the single switch models? And obviously, this doesn't apply where they're spec required. I would love to hear some thoughts on this. Thanks, Benjamin Young _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
