SilentKnight B224BI User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

SCREWS

(NOT SUPPLIED)

BOX

(NOT SUPPLIED)

DETECTOR
BASE

SNAP ON
DECORATIVE
RING

I56-0725-012R

B224BI Plug-in Isolator
Detector Base

SPECIFICATIONS

Base Diameter: 6.1˝ (155 mm)
Base Height: 1.2˝ (31 mm)
Mounting: 4˝ square box with or without plaster ring, Minimum Depth - 1.5˝ (38 mm)
4˝ octagon box, Minimum Depth - 1.5˝ (38 mm)
3
Operating Temperature Range: 14°F to 140°F (–10°C to 60°C)
NOTE: Do not install in locations where normal ambient temperature extends beyond 32°F to 120°F (0°C to 49°C)
Operating Humidity Range: 10% to 93% Relative Humidity Non-condensing

Electrical Ratings

Operating Voltage: 15 to 32 VDC
Standby Current: 450µA Maximum
Alarm Current: 5mA Maximum
Relay Contact Rating: 2A at 30VDC/0.5A @ 125VAC (Resistive); 1A @ 30VDC/0.25A @ 125VAC (Inductive)

BEFORE INSTALLING

Please thoroughly read the system wiring and installation manuals and the
System Smoke Detectors Applications Guide, which provides detailed informa­tion on detector spacing, placement, zoning, and special applications.

NOTICE: This manual should be left with the owner/user of this equipment.

IMPORTANT: The detectors used with these bases must be tested and main­tained following NFPA 72 requirements. The detectors used with these bases
should be cleaned at least once a year.

GENERAL INFORMATION

Isolator bases 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. In general, up to 25 addressable devices may be isolated between
isolator bases.

MOUNTING

The detector base mounts directly to 31⁄2- and 4-inch octagon and 4-inch
square boxes, with or without a plaster ring. To mount, remove the decorative
ring by rotating it in either direction to unhook the snaps. Then, separate the
ring from the base. Install the base on the box, using the screws supplied with
the junction box and the appropriate slots in the base. Replace the decorative
ring on the base and rotate it in either direction until the ring snaps in place
(see Figure 1).

FIGURE 1. MOUNTING BASE TO ELECTRICAL BOX:

1

⁄2˝ octagon box, Minimum Depth - 1.5˝ (38mm)

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 18 gauge (0.9 square mm). However,
wire sizes up to 14 gauge (2.0 square mm) 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.

Check the zone wiring of all bases in the system before installing detectors.
This includes checking the wiring for continuity, correct polarity, ground fault
testing, and performing a dielectric test.

3825 Ohio Avenue, St. Charles, Illinois 60174

1.800.SENSOR2; Fax: [phone]
www.systemsensor.com

D450-15-00 1 I56-0725-012R

C1008-00

WIRING INSTRUCTIONS

LISTED COMPATIBLE CONTROL PANEL

CLASS A OPTIONAL WIRING

TWISTED PAIR RECOMMENDED

(+)

(–)

(+)

(–)

1 - COMM
IN (+)

2 - COMM
IN (–)

3 - COMM

OUT (+)

2 - COMM

OUT (–)

1(+) 2(–) 3(+) 4(S)

OTHER

INTELLIGENT

DEVICES

(+)(+)

(–)

(–)

(+)

(–)

(+)

(+)

(–)

(+)

(–)

(–)

(+)

(–)

(+)

3 (+)

2 (–)

2 (–)

1 (+)

2 (–)

1 (+)

3 (+)

2 (–)

(+)

(–)

(–)

(+)

(+)

(–)

(–)

(+)

(–)

2 (–)

2 (–)

3 (+)

1 (+)

2 (–)

2 (–)

3 (+)

1 (+)

(+)

(–)

(+)

(–)

1(+) 2(–) 3(+) 4(S)

1(+) 2(–) 3(+)

4(S)

1(+) 2(–) 3(+) 4(S)

1(+) 2(–) 3(+) 4(S)

COMMUNICATION LINE

TWISTED PAIR

IS RECOMMENDED

ALL WIRING SHOWN IS SUPERVISED.

A PAIR OF FAULT ISOLATOR BASES WILL
DISCONNECT A GROUP OF DEVICES IF A

SHORT CIRCUIT OCCURS ON THE SIGNALING

LINE CIRCUIT WITHIN THAT GROUP.

GROUPS OF ADDRESSABLE DEVICES ARE

SEPERATED BY FAULT ISOLATOR BASES. ANY

COMBINATION OF COMPATIBLE LISTED DEVICES

MAY BE MIXED WITHIN A GROUP

COMPATIBLE

CONTROL PANEL

GROUP 1

GROUP 2

GROUP 3

PLASTIC LEVER

BREAK TAB AT DOTTED LINE BY
TWISTING TOWARD CENTER OF BASE.

PLASTIC LEVER

BREAK TAB AT DOTTED LINE BY
TWISTING TOWARD CENTER OF BASE.

USE SMALL-BLADED SCREWDRIVER TO PUSH
PLASTIC LEVER IN DIRECTION OF ARROW.

Make wiring connections by stripping about 3⁄8 of an inch (10 mm) of insula­tion from the wire end. Then, insert the wire into the appropriate terminal and
tighten the screw. Wire the communication line in (+) to terminal 1. Insert
both communication line in (–) and communication line out (–) to terminal

2. Wire communication line out (+) to terminal 3 (see Figures 2 and 3). Ter­minal 4 is for shielded cable only (see Figure 2). If shielded cable is used, the
shield connection to and from the detector must be continuous by using wire
nuts, crimping, or soldering to ensure a reliable connection. If shielded cable
is NOT used, leave terminal 4 in the screwed-down position.

A label is affixed to the base for recording the zone, address, and type of
detector being installed at the base location. This information is useful for set­ting the detector head address and for verification of the sensor type required
for that location.

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.

FIGURE 2:

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 4A. 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 4B). This
allows the detector to be rotated counterclockwise for removal.

NOTE: Head removal after the tamper-resist feature has been activated re­quires removal of the decorative ring.

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.

FIGURE 4A. ACTIVATING THE TAMPER-RESIST FEATURE:

C1065-00

FIGURE 4B. REMOVING THE DETECTOR HEAD FROM THE BASE:

FIGURE 3. WIRING DIAGRAM:

System Sensor warrants its enclosed air duct smoke detector to be free from defects in
materials and workmanship under normal use and service for a period of three years
from date of manufacture. System Sensor makes no other express warranty for this air
duct smoke detector. No agent, representative, dealer, or employee of the Company has
the authority to increase or alter the obligations or limitations of this Warranty. The
Company’s obligation of this Warranty shall be limited to the replacement of any part of
the air duct smoke detector which is found to be defective in materials or workmanship
under normal use and service during the three year period commencing with the date of
manufacture. After phoning System Sensor’s toll free number 800-SENSOR2 (736-7672)
for a Return Authorization number, send defective units postage prepaid to: System

D450-15-00 2 I56-0725-012R
©2008 System Sensor

Please refer to insert for the Limitations of Fire Alarm Systems

C1003-00

C1013-00

THREE-YEAR LIMITED WARRANTY

Sensor, Returns Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174.
Please include a note describing the malfunction and suspected cause of failure. The
Company shall not be obligated to replace units which are found to be defective because
of damage, unreasonable use, modifications, or alterations occurring after the date of
manufacture. In no case shall the Company be liable for any consequential or incidental
damages for breach of this or any other Warranty, expressed or implied whatsoever, even
if the loss or damage is caused by the Company’s negligence or fault. Some states do not
allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. This Warranty gives you specific legal
rights, and you may also have other rights which vary from state to state.

C1065-00