Could the LHD be moved away from the door? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-553-3553 (fax) 860-608-4559 (cell)
> > On Sep 3, 2019 at 7:25 AM, <Matt Grise via Sprinklerforum > (mailto:sprinklerforum@lists.firesprinkler.org)> wrote: > > > > > > Could you use a different type of detector near the doors that would be > easier to de-ice or more tolerant of ice buildup? Maybe a pilot detector > head? It could be changed out more easily as ice builds up. > > > > > > > > > Matt > > > > > > > > > > > > > > > From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org> On > Behalf Of Russell Gregory via Sprinklerforum > Sent: Tuesday, September 03, 2019 4:44 AM > To: sprinklerforum@lists.firesprinkler.org > Cc: Russell Gregory <rcgreg...@snap.net.nz> > Subject: Ice Build-up on Linear Heat Detection for Double Interlock > Pre-Action Sprinkler System > > > > > > > > > > We have a problem with ice forming on LHD cable inside a Coldstore at the > access doors. The LHD is “Protectowire” and is used as the first detection > for a Double Interlock Pre Action system. The Coldstore temperature is -10⁰C. > > > > Is there any way to reduce or prevent this condensing water vapour from > freezing on to the LHD? Would spraying the cable with silicone spray be > helpful? > > Is there a practical method of removing the ice at say 1 – 3 monthly > intervals? Spraying de-icing fluid comes to mind but as it is in a frozen > food warehouse that may have a contamination problem although all products > are cartoned and wrapped. > > > > I have checked FM and Manufacturers Data sheets but have not found reference > to external ice loading. > > > > VESDA recommend the application of silicone spray so wonder if this would > help. > > > > > > > > Any thoughts would be appreciated. > > > > Regards, > > > > Russell > > > > > > > > Russell A Gregory > > > > Special Projects Engineer > > > > Johnson Controls > > > > Wormald Christchurch > > > > New Zealand > > > > > > > > Ph xx64 3 338 4853 > > > > > > > > e-mail; rcgreg...@snap.net.nz (mailto:rcgreg...@snap.net.nz) > > > > > > > > > > > _______________________________________________ Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >
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