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B110LP Datasheet(PDF) 2 Page - Systemsensor advanced ideas. |
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B110LP Datasheet(HTML) 2 Page - Systemsensor advanced ideas. |
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2 / 4 page  D150-05-00 2 I56-594-03R Installation Guidelines Allowable loop resistance is an important specification for control panels as well as for smoke detectors and their bases. The alarm system cannot be expected to operate cor- rectly if system components have incompatible allowable loop resistances.Therefore, before beginning installation, refer to the control panel manufacturer’s loop resistance specification to ensure that it is listed as compatible with the System Sensor base and smoke detector being installed. System Sensor smoke detectors and mounting bases are marked with a compatibility identifier as the last digit of a five-digit code stamped on the back of the product. Connect detectors only to compatible control units as indi- cated in System Sensor’s compatibility chart. This chart consists of a current list of UL-listed control unit/detector combinations and is available from System Sensor upon request. All wiring must be installed in compliance with the National Electrical Code and all applicable local codes and any special requirements of the authority having jurisdic- tion, using the proper wire size. The conductors used to connect smoke detectors to control panels and accessory devices should be color-coded to reduce the likelihood of wiring errors. Improper connections can prevent a system from responding properly in the event of a fire. For signal wiring (the wiring between interconnected detectors), it is recommended that the wire be no smaller than AWG 18. However, the screws and clamping plate in the base can accommodate wire sizes up to AWG 12. The use of twisted pair wiring for the power (+ and -) loop is recommended to minimize the effects of electrical interfer- ence. NOTE: To ensure that electrical connections are super- vised, do NOT loop wires under terminals 2, 3, and 5 - break the wire at each terminal. To make electrical connections, strip approximately 3/8" (1 cm) insulation from the end of each wire. Slide the wires under the clamp plate and tighten the terminal screw. Check the zone wiring before installing the smoke detector head. The built-in shorting spring makes it convenient to do this. After the detector base is wired and attached to the electrical box, position the shorting spring against terminal 3. Use the slot in the retaining clip to hold the spring against the terminal, as shown in Figure 1. This shorts the negative-in and negative-out leads so that loop wiring can be tested for continuity. The shorting spring in the base will disengage automatical- ly when the detector head is removed from the base. DO NOT remove the shorting spring since it reengages as the detector head is turned into the base, completing the cir- cuit. Tamper-resistance Feature NOTE: DO NOT use the tamper-resistance feature if the System Sensor XR2 Removal Tool will be used to remove detectors from the base. This detector base can be made tamper resistant so that the detector cannot be detached without the use of a tool. To make the base tamper-resistant, break off the smaller tab at the scribed line on the tamper-resistance tab, on the detec- tor mounting bracket (see Figure 3A), before installing the detector. SNAP ON DECORATIVE RING SCREWS (NOT SUPPLIED) DETECTOR BASE BOX (NOT SUPPLIED) SHORTING SPRING Figure 1. Mounting base to box: A78-1175-01 |
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