INSTALLING WIRES FOR ALARM AND CONTROL DEVICES, ALL MODELS

TM 10-6665-297-13&P 2-6 DETECTOR INSTALLATION (continued) 2-6.4 INSTALLING WIRES FOR ALARM AND CONTROL DEVICES, ALL MODELS. Install, but do not connect wires for alarm and control devices as necessary in conduit. 2-6.5 TESTING FOR OPEN CIRCUITS, SHORT CIRCUITS, AND LEAKAGE IN DETECTOR WIRES . Before connecting conduit wires to detector, to control module, or to alarm or process control equipment, use a high-voltage insulation and leakage tester (such as a “Megger”) to test wires for open circuits, short circuits, and for leakage to ground or to another wire. Megger readings for isolated circuits should exceed 100 megohms. Repair defects, if any, to assure proper operation of the detection system, and to prevent damage to components. NOTE: Warranty is void if abnormally high voltages or currents are applied to detector elements, control modules, or associated equipment. 2-6.6 CONNECTING CONDUIT WIRES TO THE DETECTOR . Using crimp-type connectors, solder lugs, or solder splices (in accordance with National Electrical Code specifications), connect conduit wires to the detector as follows: 1.Connect active element wire A (green or red) of detector head to green conduit wire. 2.Connect reference element wire R (black) of detector head to black conduit wire. 3.Connect signal output wire C (white) of detector head to white conduit wire. All connections must be clean and tight to assure optimum performance of the monitoring system. 2-6.7 INSTALLING DETECTOR ON CONDUIT . Attach detector to conduit by means of conduit union fitting. In hazardous locations, follow National Electrical Code, Article 501, for sealing conduit wiring in hazardous areas. For outdoor installations, use an explosion-proof drain fitting to allow removal of water that will accumulate in a conduit system, to prevent corrosion or partial shorting at splices. 2-6.8 CONNECTING CONDUIT WIRES FROM DETECTOR TO CONTROL MODULE ASSEMBLY TERMINALS: Install terminal lugs on conduit wires from detector and attach to control terminals with terminal screws as follows (Figures 2-11 through 2-15): 23-9617 7/1/76 2-27