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Chapter 4 — System Installation <br /> Page 4 -6 <br /> REV. 2 <br /> After the last link in the series is connected, the cable Begin installing the Fusible Link Hangers at the terminal <br /> should be fed through the conduit back to the control head. bracket and work toward the control head. Loop the cable <br /> Thread the cable through the hole in the fusible link ratchet through the oval opening in the hanger and hook the fusible <br /> wheel. The line must then be crimped, and the crimp posi- link on the loop. See Figure 4 -10. <br /> tioned inside the center of the ratchet wheel. <br /> Note: Only ML -style Fusible Links can be used <br /> NOTE <br /> Crimps must always be used in conjunction with two <br /> (2) cable lengths. Loops are the accepted method of <br /> connecting the cable to mechanical components. The <br /> • crimp must never be used on a single cable. <br /> Exception: Single cable crimp allowed in detection <br /> and gas valve ratchet wheel using stop sleeve, Part <br /> • No. 26317 (packages of 10: Part No. 24919). <br /> The fusible link line can now be put into a set position by <br /> applying tension to the fusible link line. This is accomplished <br /> • by using a 1/2 in. hex wrench on the fusible link line ratchet <br /> wheel. The ratchet wheel will be ratcheted in a clockwise Figure 4 -10. Fusible Link Connection. <br /> 002878PC <br /> direction until the spring plate makes contact with the top of <br /> the control head box. The fusible link line is now in a set Hook the bottom of the link onto the bottom leg of the hang - <br /> position. See Figure 4 -8. er. See Figure 4 -11. <br /> FUSIBLE LINK LINE - -` <br /> RATCHET WHEEL <br /> FUSIBLE LINK LINE � 1 <br /> rrt� <br /> SPRING <br /> • <br /> •,••••• <br /> PLATE <br /> Nret <br /> t <br /> Imo' <br /> Figure 4 -8. Fusible ` <br /> Link Line Termination. • <br /> 0021376PC <br /> Figure 4 -11. Fusible Link /Hanger Connection. <br /> 2. Fusible Link Installation Using Model 002879PC <br /> FLH -1 Fusible Link Hangers. Center the hanger /link in the fusible link bracket by sliding it <br /> Beginning at the control head, feed the stainless steel cable along the link line. This is easily accomplished before any <br /> through the conduit and brackets to the terminal bracket in tension is applied to the link line. Repeat this procedure for <br /> • one continuous length. Allow approximately 2.5 in. (6.4 cm) all fusible links. <br /> of slack at each bracket for the installation of the Fusible After the last hanger /link in the series is connected, the <br /> Link Hangers. At the terminal link, a tight loop is made in cable should be fed through the hole in the fusible link <br /> the cable and secured by the crimp provided. The cable is ratchet wheel. The line must then be crimped, and the crimp <br /> attached to the far side of the terminal bracket using an "S" positioned inside the center of the ratchet wheel. <br /> hook. The "S" hook must be crimped closed after the cable <br /> is installed. See Figure 4 -9. <br /> NOTE <br /> Crimps must always be used in conjunction with two <br /> TERMINAL LINK <br /> � (2) cable lengths. Loops are the accepted method of <br /> • APRCIX. .d► connecting the cable to mechanical components. The <br /> ,• I SLACK • crimp must never be used on a single cable. <br /> Exception: Single cable crimp allowed in detection <br /> CRIMP HOOK and gas valve ratchet wheel using stop sleeve, Part <br /> Figure 4 -9. Terminal Bracket Connection. No. 26317 (packages of 10: Part No. 24919). <br /> 002877PC <br /> ULEX 3437 CEx732 <br /> March 17, 2004 <br />