System Sensor B524IEFT Instrucciones De Instalación

INSTALLATION INSTRUCTIONS FOR DETECTOR ISOLATOR BASE MODEL B524IEFT
GENERAL DESCRIPTION
Before installing detectors, please thoroughly read the system wiring and installation manuals and review the appropriate national and local
standards and codes of practice for the planning and installation of fire alarm systems.
The System Sensor B524IEFT base is designed for use with all 200, 500 and 700 series of analogue addressable detectors. They prevent an
entire communications loop from being disabled when a short circuit occurs. They accomplish this by isolating that part of the loop containing
the short from the remainder of the circuit. These bases also automatically restore the entire loop when the cause of the short circuit is
corrected. The base has been designed such that if the short circuit occurs between adjacent B524IEFT bases and no other products are
connected between, the operation of the entire loop will remain intact in the event of this one short circuit.
SPECIFICATIONS
Base Diameter 102 mm
Base Height 26 mm
Operating Temperature Range -30 o C to 70 o C
Operating Humidity Range 0% to 95% Relative Humidity (Non-condensing)
Operating Voltage 15 to 28.5 VDC
Standby Ratings < 100 µ A @ 24 VDC
Line impedance per base < 0.2 ohms @ 24 VDC
TAMPER RESIST FEATURE
Note: Do not use the tamper-resist feature if the removal tool is to be used.
This detector base includes a tamper-resist feature that prevents its removal
from the base without the use of a tool. To activate this feature, break the tab
from the detector base as shown in Figure 2. Then, install the detector. To
remove the detector from the base once the tamper-resist feature has been activated, insert a small-bladed screwdriver into the slot in the side
of the base and push the plastic lever away from the detector head (see Figure 2). This allows the detector to be rotated counterclockwise for
removal. The tamper-resist feature can be defeated by breaking and removing the plastic lever from the base. However, this prevents the feature
from being used again.
BREAK TAB AT
DOTTED LINE BY
PLASTIC LEVER
TWISTING TOWARD
CENTER OF BASE.
Figure 2. Tamper-Resist Feature
MOUNTING
The B524IEFT Isolator Base is equipped with mounting holes for fixing to installation boxes with either 2" or 60mm hole spacing. Attach the base
to a suitable junction box, using the screws supplied with the box.
For surface mounting, cut and remove the thin walled sections visible from the back of the base on the outer diameter.
D550-27-00
ACCESS MENUS
Figure 1. Terminal Layout
USE SMALL-BLADED
SCREWDRIVER TO
PUSH PLASTIC LEVER
IN DIRECTION OF
ARROW.
INSTALLATION GUIDELINES
All wiring must be installed in compliance with all applicable local codes and any special requirements of the local authority having jurisdiction,
using the proper wire sizes. 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 0.5 mm
sizes up to 2.5 mm 2 can be used with the base. The use of twisted pair wiring or shielded cable for the power (+ and -) loop is recommended to
minimize the effects of electrical interference.
If shielded cable is used, the shield connection to and from the detector must be continuous by using wire nuts, crimping, or soldering, as
appropriate, for a reliable connection.
Alarm system control panels have specifications for allowable loop resistance. Consult the control panel specifications for the total loop
resistance allowed before wiring the detector loops.
1. Make wiring connections by stripping about 10 mm of insulation from the end of the wire. Then, insert the wire into the terminal and
tighten the screw to secure the wire in place.
2. Check the zone wiring of all bases in the system before installing detectors in them. This includes checking the wiring for continuity,
correct polarity and ground fault testing.
3. Record the zone, address, and type of detector being installed at the base location on the label affixed to the bottom of the base. This
information is useful for setting the detector head address and for verification of the sensor type required for that location.
4. Once all detector bases have been wired and mounted, and the loop wiring has been checked, the detector heads may be installed in
the bases.
LIMITATIONS OF SMOKE DETECTORS
This smoke detector is designed to activate and initiate emergency action but will do so only when used in conjunction with other equipment.
Smoke detectors will not work without power.
Smoke detectors will not sense fires which start where smoke does not reach the detectors. Smoke from fires in chimneys, in walls, on
roofs, or on the other side of closed doors may not reach the smoke detector and trigger the unit.
A detector may not detect a fire developing on another level of a building. For this reason, detectors should be located on every level of a
building.
Smoke detectors also have sensing limitations. Ionisation detectors offer broad range fire-sensing capability but they are better at detecting
fast, flaming fires than slow, smouldering fires. Photoelectronic detectors sense smouldering fires better than flaming fires. Because fires
develop in different ways and are often unpredictable in their growth, neither type of detector is always best and a given detector may not always
provide warning of a fire. In general, detectors cannot be expected to provide warnings for fires resulting from inadequate fire protection
practices, violent explosions, escaping gas, improper storage of flammable liquids like cleaning solvents, other safety hazards, or arson. Smoke
detectors used in high air velocity conditions may fail to alarm due to dilution of smoke densities created by such frequent and rapid air
exchanges. Additionally, high air velocity environments may create increased dust contamination, demanding more frequent maintenance.
Smoke detectors cannot last forever. Smoke detectors contain electronic parts. Even though detectors are made to last over 10 years, any of
these parts could fail at any time. Therefore, test your smoke detector system at least semiannually. Clean and take care of your smoke
detectors regularly. Taking care of the fire detection system you have installed will measurably reduce your liability risks.
Pittway Tecnologica S.p.A., Via Caboto 19, 34147 Trieste, Italy
1
Figure 3. Typical Wiring Diagram
WARNING
2 . However, wire
© System Sensor 1998
I56-0881-001