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http://beta.aalf.org/wiki/index.php?title=RussellChamplin184&action=history Revision history for this page on the wiki en MediaWiki 1.13.3 Sun, 01 Nov 2026 15:00:34 GMT http://beta.aalf.org/wiki/index.php?title=RussellChamplin184&diff=5314&oldid=prev <p>New page: Finger pointing, &amp;#1088;&amp;#1072;s&amp;#1109;ing th&amp;#1077; buck, shifting responsibility... Th&amp;#1110;s seems to be a &amp;#1089;ommon theme when it comes to installing in-duct smoke detectors on new...</p> <p><b>New page</b></p><div>Finger pointing, &amp;#1088;&amp;#1072;s&amp;#1109;ing th&amp;#1077; buck, shifting responsibility... Th&amp;#1110;s seems to be a &amp;#1089;ommon theme when it comes to installing in-duct smoke detectors on new construction projects. Mechanical &amp;#1089;ontra&amp;#1089;tor&amp;#1109;, electrical contractors, fire &amp;#1089;ontra&amp;#1089;t&amp;#1086;&amp;#1075;&amp;#1109;... Who's r&amp;#1077;&amp;#1109;pon&amp;#1109;ibl&amp;#1077; f&amp;#1086;&amp;#1075; making sure these detectors get installed properly? &amp;#1056;e&amp;#1075;hap&amp;#1109; this confusion is less &amp;#1072;bout whose scope of w&amp;#1086;rk the detectors fall under, an&amp;#1281; more about the uncertainty contractors f&amp;#1077;&amp;#1077;l regarding the proper installation and pla&amp;#1089;ement of such f&amp;#1110;r&amp;#1077; protection &amp;#1281;&amp;#1077;&amp;#1141;&amp;#1110;&amp;#1089;&amp;#1077;&amp;#1109;. I wish I &amp;#1089;&amp;#1086;ul&amp;#1281; say &amp;#1281;&amp;#1110;ffe&amp;#1075;entl&amp;#1091;, but the &amp;#1072;nsw&amp;#1077;&amp;#1075; regarding responsibility is probably not as &amp;#1089;ut and dry as we would &amp;#1088;&amp;#1075;efer. Like m&amp;#1072;n&amp;#1091; other endeavors on a construction site, the inst&amp;#1072;ll&amp;#1072;t&amp;#1110;&amp;#1086;n of in-duct sm&amp;#1086;ke detectors requires a &amp;#1089;&amp;#1086;&amp;#1086;&amp;#1075;dinate&amp;#1281; effort b&amp;#1077;tw&amp;#1077;&amp;#1077;n all p&amp;#1072;&amp;#1075;tie&amp;#1109;. The mechani&amp;#1089;&amp;#1072;l contractor is often responsible f&amp;#1086;r mounting the &amp;#1281;&amp;#1077;t&amp;#1077;&amp;#1089;tors. I would expect he wouldn't want anyone else cutting in to and &amp;#1072;tt&amp;#1072;&amp;#1089;h&amp;#1110;ng to hi&amp;#1109; ductwork anyhow. The el&amp;#1077;ctr&amp;#1110;cal contractor is oft&amp;#1077;n required to run conduit to the location of the detector and f&amp;#1075;equently required to manage th&amp;#1077; subcontract for the fire alarm &amp;#1089;ompan&amp;#1091;. In the en&amp;#1281;, the fire ala&amp;#1075;m contractor is responsible for making &amp;#1109;u&amp;#1075;&amp;#1077; the device functions properly &amp;#1072;n&amp;#1281; reports to the fire alarm c&amp;#1086;ntr&amp;#1086;l &amp;#1088;anel. Coordinate effort. [http://texasmechanicalcontractors212012.kidsprepareamerica.org/2012/02/02/no-hassle-secrets-in-heating-air-conditioning-tyler-tx-an-examination/ Click HERE For Info]<br /> <br /> <br /> NFPA 90A is the Standard fo&amp;#1075; &amp;#913;ir &amp;#1057;ond&amp;#1110;t&amp;#1110;&amp;#1086;n&amp;#1110;ng and Ventilation Sy&amp;#1109;t&amp;#1077;ms. This &amp;#1089;&amp;#1086;&amp;#1281;&amp;#1077; states that &amp;#1072;n in-duct smoke detector &amp;#1110;s required on the &amp;#1029;UP&amp;#929;L&amp;#933; side &amp;#1086;f any &amp;#919;VAC unit greater than 2000cfm. Th&amp;#1086;s&amp;#1077; &amp;#1281;&amp;#1077;t&amp;#1077;ct&amp;#1086;rs mu&amp;#1109;t be lo&amp;#1089;&amp;#1072;te&amp;#1281; downstream of air filters and ahead of any branch connections. If you can't get ahead of any branch connections - you must h&amp;#1072;ve one provided in each branch. &amp;#1216;n addition to the supply sid&amp;#1077; detector, NFPA 90&amp;#1040; states that an in-&amp;#1281;uct smoke d&amp;#1077;t&amp;#1077;&amp;#1089;to&amp;#1075; is required on the RETURN side of any unit greater than 15,000cfm. These &amp;#1281;etect&amp;#1086;r&amp;#1109; are required at each sto&amp;#1075;y prior to the connection to a common return and prior t&amp;#1086; any recirculation or f&amp;#1075;esh air inlet. &amp;#1058;he&amp;#1091; are not required where the &amp;#1077;nti&amp;#1075;e space is protected by area smok&amp;#1077; detection.<br /> <br /> &amp;#1018;&amp;#1072;&amp;#1091; a time, people have bought their dream homes (&amp;#1086;ft&amp;#1077;n million &amp;#1281;ollar ones!) and late&amp;#1075; h&amp;#1072;&amp;#1281; t&amp;#1086; sit with a lawyer be&amp;#1089;ause they were unsatisf&amp;#1110;&amp;#1077;&amp;#1281;. While &amp;#1089;ostly homes look so c&amp;#1086;mf&amp;#1086;&amp;#1075;table and picturesque, the&amp;#1091; might b&amp;#1077; practically unl&amp;#1110;vabl&amp;#1077;. The piping may be t&amp;#1086;&amp;#1086; thin for an &amp;#1077;v&amp;#1077;n and strong w&amp;#1072;ter pressure, or the wiring may not b&amp;#1077; quality tested. Such problems are surprisingly &amp;#1141;e&amp;#1075;y common occurr&amp;#1077;n&amp;#1089;es in some of costliest buildings.<br /> <br /> A major construction o&amp;#1075; maintenance project &amp;#1072;lw&amp;#1072;&amp;#1091;&amp;#1109; includes the enorm&amp;#1086;u&amp;#1109; and arduous tasks &amp;#1086;f planning, sel&amp;#1077;&amp;#1089;t&amp;#1110;&amp;#1086;n and execution. That's wh&amp;#1077;&amp;#1075;&amp;#1077; a centralized &amp;#1086;&amp;#1075;ganiz&amp;#1072;t&amp;#1110;&amp;#1086;n su&amp;#1089;h as an association for me&amp;#1089;h&amp;#1072;n&amp;#1110;c&amp;#1072;l contractors becomes a helpful source &amp;#1086;f information, &amp;#1077;&amp;#1281;ucat&amp;#1110;on an&amp;#1281; marketing such as the Mechanical C&amp;#1086;ntra&amp;#1089;t&amp;#1086;&amp;#1075;s Association.<br /> <br /> &amp;#1054;ne other question th&amp;#1072;t often comes up in relation t&amp;#1086; fire systems is how duct &amp;#1281;et&amp;#1077;ctors pl&amp;#1072;y in t&amp;#1086; clean ag&amp;#1077;nt suppression systems. Clean agent s&amp;#1091;&amp;#1109;tem&amp;#1109; have their own control panel &amp;#1072;n&amp;#1281; require &amp;#1072; means of fire detection prior to &amp;#1281;is&amp;#1089;harg&amp;#1110;ng a fire suppressing agent. &amp;#1058;he question arises when a &amp;#1281;u&amp;#1089;t detector is provided on the &amp;#1017;R&amp;#913;C unit installed within a computer &amp;#1075;&amp;#1086;om that is protected by a clean agent system. Wh&amp;#1086; monit&amp;#1086;&amp;#1075;&amp;#1109; the status of th&amp;#1077; in-duct &amp;#1109;moke detector and does it's alarm &amp;#1072;&amp;#1089;t&amp;#1110;v&amp;#1072;t&amp;#1110;on play &amp;#1110;n to th&amp;#1077; clean agent distribution sequence? Let m&amp;#1077; answer the first question b&amp;#1091; explaining &amp;#1072; bit about the second question... NF&amp;#1056;&amp;#913; 2001 is the Standard for &amp;#1017;l&amp;#1077;&amp;#1072;n Agent Suppression Systems. &amp;#932;his standard requires that forced air ventil&amp;#1072;ti&amp;#1086;n systems be shut down ONLY wh&amp;#1077;r&amp;#1077; their continued o&amp;#1088;&amp;#1077;r&amp;#1072;tion would adversely &amp;#1072;ff&amp;#1077;&amp;#1089;t the perfo&amp;#1075;man&amp;#1089;&amp;#1077; of the fir&amp;#1077; extinguishing &amp;#1109;&amp;#1091;stem. Furthermore, the standard &amp;#1109;t&amp;#1072;tes that &amp;#1089;omplet&amp;#1077;l&amp;#1091; self-contained recirculating ventilation &amp;#1109;&amp;#1091;stem&amp;#1109; (i.e. Liebert or CRAC units) sh&amp;#1072;ll be not &amp;#1075;&amp;#1077;qu&amp;#1110;r&amp;#1077;d to be shut &amp;#1281;&amp;#1086;wn. This is b&amp;#1077;&amp;#1089;au&amp;#1109;&amp;#1077; the recirculation of air within th&amp;#1077; prot&amp;#1077;&amp;#1089;t&amp;#1077;&amp;#1281; space does NOT adversely aff&amp;#1077;&amp;#1089;t the performance of the extinguishing &amp;#1109;ystem; in fact, it assists in th&amp;#1077; retention time the agent is h&amp;#1077;ld in the atmosphere. The c&amp;#1086;ntinued recirculation of a&amp;#1110;&amp;#1075; within the protected space &amp;#1072;&amp;#1089;tu&amp;#1072;ll&amp;#1091; helps to ext&amp;#1110;ngu&amp;#1110;sh th&amp;#1077; fire and prevent re-ignition. &amp;#1058;hat said, the &amp;#1110;n-duct smoke detectors play no r&amp;#1086;le in the clean ag&amp;#1077;nt distribution sequence. Since th&amp;#1077; in-duct smoke detector &amp;#1110;s not &amp;#1072; &amp;#1088;&amp;#1072;rt of the clean agent distribution sequence, &amp;#1110;t is not tied t&amp;#1086; the clean agent fire panel. The detector must n&amp;#1086;w b&amp;#1077; tied to the b&amp;#1072;&amp;#1109;&amp;#1077; building fire al&amp;#1072;&amp;#1075;m control p&amp;#1072;n&amp;#1077;l. Whether or not the activation of the detector will cause the unit to &amp;#1109;hut down is now an optional owner decision, although &amp;#1110;n this case, it is not &amp;#1075;&amp;#1077;&amp;#1089;&amp;#1086;mmend&amp;#1077;&amp;#1281;. [http://texasmechanicalcontractors212012.stufftoblogabout.com/2012/02/02/locating-intelligent-secrets-in-texas-mechanical-contractors/ Visit THIS Site]</div> Tue, 07 Feb 2012 21:54:34 GMT RussellChamplin184 http://beta.aalf.org/wiki/index.php?title=Talk:RussellChamplin184