Title: Tørrsprinkler.pdf
Clearance Space In accordance with NFPA 13, when connecting an area subject to freez- ing and an area containing a wet pipe sprinkler system, the clearance space around the sprinkler barrel of dry-type sprinklers must be sealed. Due to tem- perature differences between two areas, the potential for the formation of condensation in the sprinkler and subsequent ice build-up is increased. If this condensation is not controlled, ice build-up can occur that might damage the dry-type sprinkler and/or prevent proper operation in a fire situation.Use of the Model DSB-2 Dry Sprinkler Boot, described in technical data sheet TFP591 and shown in Figures 14 and 15, can provide the recommended seal.TFP500 Page 7 of 10FACE OF SPRINKLER FITTINGHEATED AREADSB-2 INTENDED FOR FREEZER STRUCTURESEXPOSURE LENGTH (SEE DESIGN CRITERIA SECTION)TO DRY SYSTEM