Description
3/16-inch heavy wall copper tubing (Figure 4-34) is used to interconnect the heat actuated detectors with each other and back to the pneumatic control head(s). The tubing is available in 17-in, 46-in and 12-ft lengths as indicated in Table 4-10. Typically, the 17-in length is used to interconnect tandem pneumatic control heads. The 46-in and 12-ft lengths are used to interconnect the heat actuated detectors and also back to the pneumatic control head(s).
In a given tubing arrangement, the maximum allowed overall length of 3/16″ tubing is 100-ft (30.48-m).
