Johnson Controls 2951JR User manual

JC-400-005 1 I56-3573-001R
This sensor must be installed in compliance with the control panel system
installation manual. The installation must meet the requirements of the Au-
thority Having Jurisdiction (AHJ). Sensors offer maximum performance when
installed in compliance with the National Fire Protection Association (NFPA);
see NFPA 72.
GENERAL DESCRIPTION
Model 2951JR is an intelligent sensor that combine a state-of-the-art photoelec-
tronic sensing chamber with communications.
Two LEDs on each sensor light to provide a local, visible sensor indication.
Remote LED annunciator capability is available as an optional accessory (Part
No. RA400Z). The sensor will support either FlashScan™ or CLIP (Classic Loop
Interface Protocol) SLC communication mode.
Johnson Controls panels offer different feature sets across different models.
As a result, certain features of the 2951JR may be available on some control
panels, but not on others. The possible features available in the 2951JR, if sup-
ported by the control unit are:
1. The panel controls the LED operation on the sensor. Operational modes are
RED blink, RED continuous, GREEN blink, GREEN continuous, and off.
2. The remote output may be synchronized to the LED operation or con-
trolled independent of the LEDs.
When 2951JR is used in duct applications with a DNR/DNRW, testing can be
done remotely using approved System Sensor test accessories, eliminating the
need for a test coil.
NOTE: Only System Sensor approved accessories may be used with the 2951JR.
The 2951JR requires compatible addressable communications to function
properly. Connect the 2951JR sensor to listed-compatible control panels only.
SPACING
Johnson Controls recommends spacing sensors in compliance with NFPA 72.
In low air flow applications with smooth ceilings, space sensors 30 feet apart.
For specific information regarding sensor spacing, placement, and special ap-
plications, refer to NFPA 72 or the System Smoke Detector Application Guide,
(A05-103-XX) available from Johnson Controls.
Duct Applications: 2951JR is listed for use in ducts. See Duct Applications
Guide A05-1004 for details on pendant mount applications.
WIRING INSTRUCTIONS
All wiring must be installed in compliance with the National Electrical Code,
applicable local codes, and any special requirements of the Authority Having
Jurisdiction. Proper wire gauges should be used. The installation wires should
be color-coded to limit wiring mistakes and ease system troubleshooting. Im-
proper connections will prevent a system from responding properly in the
event of a fire.
Disconnect power from the SLC communication line before installing sensors.
1. Wire the sensor base (supplied separately) per the wiring diagram, Figure 1.
2. Set the desired SLC address on the sensor address switches.
3. Install the sensor into the sensor base. Push the sensor into the base
while turning it clockwise to secure it in place.
I56-3573-001R
INSTALLATION AND MAINTENANCE INSTRUCTIONS
2951JR Intelligent Photoelectric
Smoke Sensor with Remote Test
Capability in Duct Applications
SPECIFICATIONS
Operating Voltage Range: 15 to 32 VDC
Standby Current: 300µA @ 24 VDC (one communication every 5 seconds with LED blink enabled)
Maximum Alarm Current (LED on): 6.5 mA @ 24 VDC
Operating Humidity Range: 10% to 93% Relative Humidity, Non-condensing
Operating Temperature Range: 32°F to 120°F (0°C to 49°C) 2951JR, -4°F to 158°F (-20°C to 70°C) 2951JR in duct applications
Height: 2.0˝ (51 mm) installed in B210LPJ and B501J Bases
Diameter: 6.1˝ (155 mm) installed in B210LPJ Base; 4.1˝ (104 mm) installed in B501J Base
Weight: 5.2 oz. (147 gm)
4. After all sensors have been installed, apply power to the control unit and
activate the communication line.
5. Test the sensor(s) as described in the TESTING section of this manual.
FIGURE 1. WIRING DIAGRAM:
32
1
32
1
+
-
-
+
+ -
REMOTE
ANNUNCIATOR
UL LISTED COMPATIBLE
CONTROL PANEL
OPTIONAL RETURN LOOP
DO NOT LOOP WIRE
UNDER TERMINAL 1 OR 2.
BREAK WIRE RUN TO
PROVIDE SUPERVISION
OF CONNECTION.
C0147-00
Note: Only System Sensor approved accessories may be used with the 2951JR.
FIGURE 2. ROTARY SLC ADDRESS SWITCHES:
TENS ONES
9
10
11
12
13
14
15
8
7
6
5
4
3
210
9
8
7
6
5
4
3
210
C0162-00
CAUTION
Dust covers provide limited protection against airborne dust particles during
shipping. Dust covers must be removed before the sensors can sense smoke.
Remove sensors prior to heavy remodeling or construction.
TAMPER-RESISTANCE
Model 2951JR includes a tamper-resistant capability that prevents its removal
from the bracket without the use of a tool. Refer to the base manual for details
on making use of this capability.
TESTING
Before testing, notify the proper authorities that the system is undergoing
maintenance, and will temporarily be out of service. Disable the system to
prevent unwanted alarms.
All sensors must be tested after installation and periodically thereafter. Test-
ing methods must satisfy the Authority Having Jurisdiction (AHJ). Sensors
offer maximum performance when tested and maintained in compliance with
NFPA 72. The sensor can be tested in the following ways:
507 E. Michigan Street
Milwaukee, WI 53201
Phone: [phone]

JC-400-005 2 I56-3573-001R
©2009 Johnson Controls
FCC STATEMENT
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
– Consult the dealer or an experienced radio/TV technician for help.
A. Functional: Magnet Test (P/N M02-04-01 or M02-09-00)
This sensor can be functionally tested with a test magnet. The test magnet
electronically simulates smoke in the sensing chamber, testing the sensor
electronics and connections to the control panel.
1. Hold the test magnet in the magnet test area as shown.
2. The sensor should alarm the panel.
Two LEDs on the sensor are controlled by the panel to indicate sensor
status. Coded signals, transmitted from the panel, can cause the LEDs
to blink, latch on, or latch off. Refer to the control panel technical docu-
mentation for sensor LED status operation and expected delay to alarm.
B. B. Smoke Entry
The GEMINI model 501 aerosol generator can be used for smoke entry
testing. Set the generator to represent 4%/ft to 5%/ft obscuration as de-
scribed in the GEMINI 501 manual. Using the bowl shaped applicator,
apply aerosol until the panel alarms.
Additionally, canned aerosol simulated smoke (canned smoke agent)
may be used for smoke entry testing of the smoke detector. Tested and
approved aerosol smoke products are:
Manufacturer Model
Home Safeguard Industries 25S
SDi CHEK02 and CHEK06
SDi SOLOA4
SDi SMOKESABRE-01
When used properly, the canned smoke agent will cause the smoke detector
to go into alarm. Refer to the manufacturer’s published instructions for proper
use of the canned smoke agent.
CAUTION
Canned aerosol simulated smoke (canned smoke agent) formulas will vary by
manufacturer. Misuse or overuse of these products may have long term ad-
verse effects on the smoke detector. Consult the canned smoke agent manufac-
turer’s published instructions for any further warnings or caution statements.
C. Remote Test
2951JR can be remotely tested using the RTS451, RTS451KEY, RTS151,or
RTS151KEY test accessories. Refer to the DNR/DNRW manual for wiring
diagrams. Maximum test response time may be up to two communica-
tions from the panel.
A sensor that fails any of these tests should be cleaned as described under
CLEANING, and retested. If the sensor fails after cleaning, it must be re-
placed. When testing is complete, restore the system to normal operation and
notify the proper authorities that the system is back in operation.
FIGURE 3. TEST MAGNET POSITION:
LED TEST MAGNET
POSITION
MAGNET TEST
MARKER
LED
C0145-02
HIGH SENSITIVITY SETTING (applies to 2951JR)
The use of the 0.2% to 0.5% per foot sensitivity setting requires a 90 day test
period to ensure that the detector’s environment is suitable for this setting.
The following steps must be followed to meet Johnson Controls and UL re-
quirements for this high sensitivity application:
1. Each detector intended for 0.2% to 0.5% per foot alarm application shall
have its initial alarm setting set for 0.5% obscuration per foot alarm level.
The initial pre alarm setting for the detector shall be set to the intended alarm
setting of the system. Pre alarm shall be set for non latching operation.
2. Detectors set at 0.2% to 0.5% per foot are intended for use in smoke-
free, environmentally controlled applications, such as computer rooms
and clean rooms. In order to determine if an environment is suitable for
installation, the detectors shall be operated continuously for 90 days with
all environmental factors, including temperature, humidity, air flow, oc-
cupancy, etc., similar to the intended application for these detectors. An
electronic history file or printer shall be used to record all events associ-
ated with the detectors under testing.
3. At the end of 90 days, the results of the test shall be inspected by an au-
thorized Johnson Controls representative or the end user, if trained by an
authorized Johnson Controls representative. If no alarms or pre alarms
are recorded for the detectors under testing, the system may be set to the
tested pre alarm level in the 0.2% to 0.5% per foot range.
CLEANING
Before removing the detector, notify the proper authorities that the smoke
detector system is undergoing maintenance and will be temporarily out of
service. Disable the zone or system undergoing maintenance to prevent un-
wanted alarms.
1. Remove the sensor to be cleaned from the system.
2. Remove the sensor cover by pressing firmly on each of the four removal
tabs that hold the cover in place.
3. Vacuum the screen carefully without removing it. If further cleaning is
required continue with Step 4, otherwise skip to Step 7.
4. Remove the chamber cover/screen assembly by pulling it straight out.
5. Use a vacuum cleaner or clean, compressed air to remove dust and de-
bris from the sensing chamber.
6. Reinstall the chamber cover/screen assembly by sliding the edge over the
sensing chamber. Turn until it is firmly in place.
7. Replace the cover using the LEDs to align the cover and then gently
pushing it until it locks into place.
9. Reinstall the detector.
10. Test the detector as described in TESTING.
11. Reconnect disabled circuits.
12. Notify the proper authorities that the system is back on line.
FIGURE 4. SENSOR ASSEMBLY:
SENSOR
COVER
SENSING
CHAMBER
COVER AND
SCREEN
COVER
REMOVAL
TABS
SENSING
CHAMBER
SPECIAL NOTE REGARDING SMOKE DETECTOR GUARDS
Smoke detectors are not to be used with detector guards unless the combina-
tion has been evaluated and found suitable for that purpose.
Please refer to insert for the Limitations of Fire Alarm Systems
C0119-00