SIMPLEX TYCO   517.050.041

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The Tyco 4B 4" Universal Detector Base (part number 517.050.041) is a common fire detection system component designed to provide a secure and reliable mounting platform for compatible Tyco fire detectors.2 It's classified as a "Universal" base, meaning it's used in installations where a short circuit isolator or continuity functionality is not required.

• Continuity, Isolator and Universal variants
• Quick and easy to install
• Compatible with 800, 814, and 850 Series detectors
• Park position for testing
• Optional detector locking device
• Slim 4-inch profile
• Snap-fit to Ceiling Tile Adaptor
• Optional detector locking device.
• Break-outs for surface mount wiring.

The 4B-C Continuity base is used for most installations involving 850 Series detectors, as it allows the detector’s in-built short circuit isolation function to be in-circuit when the detector is fitted and ensures continuity is maintained when the detector is removed. The 4B-I Short Circuit Isolator base is used to protect circuits that use devices that do not have built-in shortcircuit isolation. The 4B Universal base is used when neither short circuit isolator nor continuity functionality is required. All 4-inch bases are compatible with the Ceiling Tile Adaptor that can potentially decrease installation time by up to 30%.

The 4B detector bases are designed to snap-fit to the Ceiling Tile Adaptor. Alternatively they can be screw fixed to a ceiling, electrical box, or deckhead mount in the traditional manner. A park position allows the detector to be mechanically attached to the base without making electrical connection to facilitate the testing of electronic-free bases. The base should be fixed such that the park plunger faces toward the door or trafficable area. This ensures the detector LED will be visible from the direction of entry, in accordance with AS1670.1-2004. With a detector mounted in the base, a raised rib on both the base and detector align when the detector is in the fully home position.

Cables should be arranged at each side of the terminal screw. A maximum of two 1.5mm2 cables or one 2.5mm2 cable can be fitted to one terminal. Any additional cables (such as Remote Indicator) should be fitted with suitable fork or eyelet crimp terminal lugs. The installation should comply with AS 1670.1 or NZS 4512.

L (-In/Out) L1 (+In/Out). A remote indicator may be connected between loop positive L1 (+In/Out) and terminal R (-ve). Terminal L2 must not be used.

The detector locking device is part of the base moulding. If required, it is detached and inserted into the locking aperture. A detector mounted in the base will now be locked in position. The detector can then be removed only after inserting an unlocking tool into the hole on the detector cover to depress the spring tab on the locking device. A 3mm rod could be a suitable unlocking tool; one can be fabricated by grinding a screwdriver with a 3mm diameter shaft to a length of 22mm.The detector locking device is part of the base moulding. If required, it is detached and inserted into the locking aperture. A detector mounted in the base will now be locked in position. The detector can then be removed only after inserting an unlocking tool into the hole on the detector cover to depress the spring tab on the locking device. A 3mm rod could be a suitable unlocking tool; one can be fabricated by grinding a screwdriver with a 3mm diameter shaft to a length of 22mm.

Bases with an isolating function have an LED fitted. Bases without an isolator have an empty aperture, which may be filled using a plug detached from the base moulding.Bases with an isolating function have an LED fitted. Bases without an isolator have an empty aperture, which may be filled using a plug detached from the base moulding.

The Tyco MX addressable system should be maintained in accordance with the relevant parts of AS 1851 or NZS 4512. The Tyco X300 Smoke Tester, X461 Heat Tester and CO test gas (part no. 517.001.262) may be used for testing the detector in-situ. Rotating the detector anticlockwise past an indent to the park position disconnects the detector from the circuit whilst still retaining it in the base, allowing loop testing etc. Depressing the plunger at the side of the base allows the detector to be rotated back into its operating position.