INSTALLATION AND MAINTENANCE INSTRUCTIONS

I56-2170-009R
Series
Photoelectric Smoke Detector 3825 Ohio Avenue, St. Charles, Illinois 60174
2-Wire: 2WTR-B (Form C Relay), 2WTA-B (Sounder)
4-Wire: 4WTR-B (Form C Relay), 4WTA-B (Sounder)
1-800-SENSOR2, FAX: 630-377-6495
4WTAR-B (Form C Relay, Sounder), 4WITAR-B (Isolated Thermal, Form C Relay, Sounder) www.systemsensor.com

ELECTRICAL SPECIFICATIONS
2-wire 4-wire
System Voltage –Nominal: 12/24 12/24 V
(Non-polarized for 2WTR-B and 4WTR-B)
Min.: 8.5 10 V
Max.: 35 35 V
Max. Ripple Voltage: 30 30 % peak to peak of applied voltage
Avg. Standby Current: 50 50 µA average
Peak Standby Current: 100 — µA
Max. Alarm Current
4WTA-B, 4WTR-B: — 35 mA
4WTAR-B, 4WITAR-B: — 50 mA
2WTR-B: 130 — mA panel must limit current
2WTA-B: 130*
Alarm Contact Ratings: — 0.5 A @ 30 V AC/DC
Form C Contact Ratings: 2 2 A @ 30 V AC/DC
Audible Signal
(temp-3 tone): 85 85 dBA min. in alarm or supply polarity reversed (Sounder units only)
Remote Annunciator Output: 7 — mA maximum
EOL Relay: — 12/24 EOLR-1
2-wire 4-wire
Reset Time (min): 0.3 0.3 seconds
Max. Start-up Capacitance: 0.1 — µF
Max. Initial Start-up Time: 45 15 seconds
AlarmVerification**
Start-up Time: 15 15 seconds
*Direct Power (Non-reverse Polarity): 130 mA limited by panel.
Reverse Polarity Power: 30 mA for the 2WTA-B in alarm; 12 mA for all other 2WTA-B units on the loop. Add 25 mA for the RRS-MOD reversing relay alarm current.
**Assumes the panel’s alarm verification reset time is 10 seconds or less. Should the alarm verification reset exceed 10 seconds, use the maximum initial start-up time.

PHYSICAL SPECIFICATIONS
Heat Sensor: 135°F (57.2°C)
Freeze Trouble: 41°F (5°C)
Operating Temperature Range: 32 to 100°F (0 to 37.8°C)
Operating Humidity Range: 0 to 95% RH non-condensing
Storage Temperature Range: –4 to 158°F (–20 to 70°C)
Diameter (including base): 5.3 inches
Height (including base): 2.0 inches
Weight: 7.1 oz.
BEFORE INSTALLING
Please read thoroughly System Sensor’s Applications Guide for System Smoke Models 2WTA-B, 4WTA-B, 4WTAR-B, and 4WITAR-B contain a piezoelectric
Detectors (SPAG91), which provides detailed information on detector spacing, horn which generates the ANSI S3.41 temporal pattern in an alarm condition.
placement, zoning, wiring, and special applications. This is available online All detectors on a zone will sound when the power supply to them is reversed.
from System Sensor’s web site: www.systemsensor.com. The RRS-MOD can be used for the power supply reversal function. The RRS-
MOD also enables all the detectors’ sounders on a zone to be synchronized
NOTICE: This manual shall be left with the owner/user of this equipment.
and allows the zone to be silenced from the panel by entering the alarm si-
IMPORTANT: This detector must be tested and maintained regularly follow- lence key at the keypad.
ing National Fire Protection Association (NFPA) 72 National Fire Alarm Code
The detector that initiated the alarm condition will have its red LED and Form
requirements. At a minimum, cleaning should be performed annually.
C relays (if applicable) latched until reset by panel.
GENERAL DESCRIPTION
The model 4WITAR-B photoelectronic smoke sensor is isolated from the fixed-
Models 2WTR-B and 2WTA-B are 2-wire photoelectric smoke detectors; models
temperature heat sensor, providing a self-resetting, local audible smoke alarm
4WTR-B, 4WTA-B, 4WTAR-B, and 4WITAR-B are 4-wire photoelectric smoke
that does not alarm at the panel. Only the fixed-temperature heat sensor will
detectors. All models incorporate a state-of-the-art optical sensing chamber
cause the 4WITAR-B to initiate an alarm at the panel and the relay to change
and an advanced microprocessor. The microprocessor allows the detector to
its state.
automatically adjust its sensitivity back to the factory setting when it becomes
more sensitive due to contaminants settling in its chamber. In order for this NOTE: In order for all i3 sounder detectors on a loop to sound when the panel
feature to work properly, the chamber must never be opened while power is alarms, the supply voltage polarity must be reversed. A reversing relay, System
applied to the smoke detector. This includes cleaning, maintenance or screen Sensor model number RRS-MOD, must be used. The RRS-MOD is designed
replacement. All models also feature a restorable, built-in, fixed temperature to allow all i3 Series detectors in the same loop to sound when one of the
(135°F) thermal detector and are also capable of sensing a freeze condition if detectors goes into alarm. In addition, the RRS-MOD will synchronize all of
the temperature is below 41°F. the i3 Series sounder smoke detectors on the loop. Some panels may require

1 I56-2170-009R
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the use of programmable outputs. Refer to System Sensor literature for further Each i3 Series detector is supplied with a mounting base that can be ceiling- or
information on the RRS-MOD. wall-mounted:
All i3 Series detectors are designed to provide open area protection. Two-wire models 1. To a single gang box, or
must be used with compatible UL Listed panels only. 2. To a 31⁄2-inch or 4-inch octagonal box, or
3. To a 4-inch square box with a plaster ring, or
When used with an “i3 Ready” control panel or the i3 Series 2W-MOD2 mod-
4. Direct mount or to ceiling using drywall fasteners.
ule (refer to installation manual), the 2WTR-B and 2WTA-B are capable of
generating a “maintenance needed” signal. The 2W-MOD2 can indicate a need FIGURE 1: MOUNTING OF DETECTOR
for cleaning, replacement, or a freeze trouble at the control panel or module.

WARNING
The 2W-MOD2 has replaced the previous model number 2W-MOD. To ensure
proper remote maintenance signaling capabilities, do not use the 2W-MOD
with i3 model numbers 2WTR-B and 2WTA-B.
S0121-00
Installation of the 2WTR-B, 2WTA-B, 4WTR-B, 4WTA-B, 4WTAR-B, and The i3 Series heads and bases are keyed so that all heads will only fit into
4WITAR-B detectors is simplified by the use of a mounting base that may their respective bases. One model 4-wire relay base will accept the 4WTR-B,
be pre-wired to the system, allowing the detector to be easily installed or re- 4WTAR-B and 4WITAR-B detector heads and no others. The 2WTR-B, 2WTA-B
moved. The mounting base installation is further simplified by the incorpora- and 4WTA-B will only fit into their respective mounting bases and no others.
tion of features compatible with drywall fasteners. The heads and bases are clearly identified as either 2-wire or 4-wire. When
Two LEDs on the detector provide a local visual indication of the detector’s status: mounting the i3 Series, ensure that the head is mounted to the correct base,
and the test switch is aligned with the tamper release tab.
TABLE 1: DETECTOR LED MODES
TAMPER-RESISTANT FEATURE
Green LED Red LED The i3 Series detectors include a tamper-resistant feature that prevents re-
Power-up Blink 10 sec Blink 10 sec moval from the mounting base without the use of a tool. To engage the tam-
Normal (standby) Blink 5 sec — per-resistant feature, cut the small plastic tab located on the mounting base
Out of sensitivity — Blink 5 sec (Figure 2), and then install the detector. To remove the detector from the base
once it has been made tamper resistant, use a small screwdriver to depress the
Freeze Trouble — Blink 10 sec
square tamper release tab, located on the skirt of the mounting base, and turn
Alarm — Solid the detector counterclockwise.
INSTALLATION GUIDELINES
During an initial power-up delay, the red and green LEDs will blink synchro-
The i3 Series detectors represent an advancement over the previous sounder
nously once every ten seconds. It will take approximately 80 seconds for the
and Form C relay models and are designed to be used with the 2W-MOD2 and
detector to finish the power-up cycle (see Table 2).
RRS-MOD only. Do not mix detector models on a zone.
TABLE 2: POWER-UP SEQUENCE FOR LED STATUS INDICATION*
FIGURE 2: TAMPER-RESISTANT FEATURE
Condition Duration SNAP OFF TAB FOR
TAMPER LOCK
Initial LED Status Indication 80 seconds
Initial LED Status Indication 4 minutes
(if excessive electrical noise is present)
*Refer to Electrical Specifications for start-up time in conjunction with panel
alarm verification.
NOTE: If, during power-up, the detector determines there is excessive electri-
cal noise in the system such as those caused by improper grounding of the TAMPER RELEASE TAB
S0109-00
DIRECT MOUNT HOLES
system or the conduit, both LEDs will blink for up to 4 minutes before display-
WIRING INSTALLATION GUIDELINES
ing detector status (see Table 2).
All wiring must be installed in compliance with the NFPA 70, National Electri-
After power-up has completed and the detector is functioning normally within cal Code, applicable state and local codes, and any special requirements of the
its listed sensitivity range, the green LED blinks once every five seconds. If the local Authority Having Jurisdiction.
detector is in need of maintenance because its sensitivity has shifted outside
Proper wire gauges should be used. The conductors used to connect smoke
the listed limits, the red LED blinks once every five seconds. When the detec-
detectors to the alarm control panel and accessory devices should be color-
tor is in the alarm mode, the red LED latches on. The LED indication must not
coded to reduce the likelihood of wiring errors. Improper connections can
be used in lieu of the tests specified under Testing. In a freeze trouble condi-
prevent a system from responding properly in the event of a fire.
tion, the red LED will blink once every 10 seconds (refer to Table 1).
The screw terminals in the mounting base will accept 14–22 gauge wire. For
To measure the detector’s sensitivity, the i3 Series Model SENS-RDR Infrared
best system performance, all wiring should be installed in separate grounded
Sensitivity Reader tool (see Figure 4) should be used. Refer to instructions
conduit; do not mix fire alarm system wiring in the same conduit as any other
manual D100-98-00 for the proper use of the SENS-RDR.
electrical wiring. Twisted pair may be used to provide additional protection
Models 2WTR-B and 2WTA-B also include an output that allows an optional against extraneous electrical interference.
Model RA400Z/RA100Z Remote Annunciator to be connected.
Wire connections are made by stripping approximately 1⁄4-inch of insulation
MOUNTING from the end of the feed wire, inserting it into the proper base terminal, and
General spacing guidelines are 30˝×30˝, with each detector covering 900 ft2 tightening the screw to secure the wire in place. Do not put wires more than 2
under maximum conditions. gauge apart under the same clamping plate.
Consult NFPA 72, the local Authority Having Jurisdiction (AHJ), and/or ap- TWO-WIRE COMPATIBILITY
plicable codes for specific information regarding the spacing and placement System Sensor two-wire smoke detectors are marked with a compatibility
of smoke detectors. identifier located on the label on the back of the product. For two-wire mod-
els 2WTR-B and 2WTA-B, connect detectors only to compatible alarm control
panels as identified by System Sensor’s two-wire compatibility chart, available
at www.systemsensor.com.

2 I56-2170-009R
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NOTE: Models 2WTR-B and 2WTA-B are not to be installed on initiating cir- INSTALLATION
cuits containing other makes/models of smoke detectors.
WARNING
NOTE: Style D initiating circuits require the use of a 2W-MOD2 for models
2WTR-B and 2WTA-B. Remove power from alarm control unit or initiating device circuits before in-
stalling detectors.
WIRING DIAGRAMS
FIGURE 3A: WIRING DIAGRAM, 2WTR-B AND 2WTA-B NOTE: To install units so that corresponding LEDs are lined up, refer to the
“Green LED” indicator on the base.
EOL
1. Wire the mounting base screw terminals per Figure 3a or Figure 3b, as
2-WIRE
RESISTOR applicable.
ZONE RA400Z (5) RA – 2. Place detector on the base and rotate clockwise. The detector will drop
(6) NC
(4) RA + OPTIONAL into the base and lock into place with a “click”.
(7) C
(3) – IN/OUT RELEASING
–
(8) NO 3. After all detectors have been installed, apply power to the alarm control unit.
(2) + OUT DEVICE
(1) + IN 4. Test each detector as described in Testing.
+
5. Reset all the detectors at the alarm control unit.
2-WIRE 6. Notify the proper authorities that the system is in operation.
CONTROL NOT INCLUDED ON
PANEL 2WTA-B MODEL
CAUTION
S0122-00
Dust covers are an effective way to limit the entry of dust into the smoke
detector sensing chamber during construction. However, they may not com-
NOTE: FOR ALL COMPATIBLE ADEMCO PANELS,
pletely prevent airborne dust particles from entering the detector. Therefore,
DO NOT EXCEED 30 OHMS LINE IMPEDANCE.
System Sensor recommends the removal of detectors before beginning con-
NOTE: ONLY ONE 2WTR-B DETECTOR PER ZONE CAN BE USED.
struction or other dust producing activity. When returning the system to ser-
NOTE: Only one 2WTA-B detector shall be installed on a zone, unless the
vice, be sure to remove the dust covers from any detectors that were left in
panel switches the zone to a reverse polarity, non-current limited power sup-
place during construction.
ply. For panels that do not provide this feature, a reversing relay, System Sen-
sor model RRS-MOD, may be used. When utilized with the 2WTA-B, it allows
CAUTION
for more than one detector to be utilized on a loop. Some panels may require
the use of programmable outputs. Refer to System Sensor literature for further Smoke detectors are not to be used with detector guards unless the combina-
information on the RRS-MOD. The 2WTA-B detector shall not be mixed with tion has been evaluated and found suitable for that purpose.
other 2-wire detectors on the same zone.
CAUTION

CAUTION When using the RRS-MOD with model 2WTA-B, do not mix the 2WTA-B with
Any 2-wire i3 smoke detector (2W-B, 2WT-B, 2WTA-B, or 2WTR-B) wired other model smoke detectors and dry contact closure devices, including me-
in the Style D initiating device circuit (IDC) configuration requires the use chanical heat detectors, manual pull stations and waterflow switches. Such
of a 2W-MOD2 module. This is because fire alarm control panels vary by mixing can cause a direct short on the auxiliary power terminals, damaging
manufacturer on the implementation of Style D circuits. Therefore, the only the control panel’s internal circuitry and/or damage devices connected to the
way to insure proper operation of 2-wire i3 smoke detectors (2W-B, 2WT-B, initiating device circuit.
2WTA-B, or 2WTR-B) on Style D IDC’s is to use a 2W-MOD2 module. Refer to
the 2W-MOD2 installation manual, document D500-46-00, for Style D wiring TESTING
diagrams. The 2W-MOD2 installation manual may be downloaded from the Detectors must be tested after installation and following maintenance.
System Sensor web site at www.systemsensor.com.
NOTE: Before testing, notify the proper authorities that maintenance is being
performed and the system will be temporarily out of service. Disable the zone
FIGURE 3B: WIRING DIAGRAM, 4WTR-B, 4WTA-B, 4WTAR-B, AND
or system undergoing maintenance to prevent any unwanted alarms.
4WITAR-B
Ensure proper wiring and power is applied. After power up, allow 80 seconds
for the detector to stabilize before testing.
AUX OR + EOL
SMOKE RELAY Test i3 Series detectors as follows:
POWER – (EOLR-1)

–
A. TEST SWITCH
IDC +
1. An opening for the recessed test switch is located on the detector hous-
EOL
RESISTOR ing (See Figure 4).
2. Insert a small screwdriver or allen wrench (0.18˝ max.) into the test
switch opening; push and hold.
(1) + IN
(2) + OUT
(3) – IN/OUT
(4) A
(5) A

(1) + IN
(2) + OUT
(3) – IN/OUT
(4) A
(5) A

4-WIRE
CONTROL
PANEL
3. If the detector is within the listed sensitivity limits, the detector’s red
LED should light within one second.

FIGURE 4: RECESSED TEST SWITCH OPENING AND SENS-RDR POSITION

NOT INCLUDED ON
(8) NO
(7) C
(6) NC
(8) NO
(7) C
(6) NC

NOT INCLUDED ON 4WTA-B MODEL POSITION SENS-RDR AT AN ANGLE ON

4WTA-B MODEL THE OVAL AREA OR AT THE CHAMBER
OPENING BY THE WORD “PAINT”
OPTIONAL OPTIONAL
RELEASING RELEASING
DEVICE DEVICE
S0123-01
LED

PUSH RECESSED
RECESSED SWITCH WITH A
TEST SWITCH 0.18≤ MAX.
DIAMETER TOOL

S0110-00

3 I56-2170-009R
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B. SMOKE ENTRY TEST MAINTENANCE
Hold a smoldering punk stick or cotton wick at the side of the detector and NOTE: Before performing maintenance on the detector, notify the proper au-
gently blow the smoke through the detector until it alarms. thorities that maintenance is being performed and the system will be tem-
porarily out of service. Disable the zone or system undergoing maintenance
C. DIRECT HEAT METHOD
to prevent any unwanted alarms. Power must be removed from the detector
Using a 1000-1500 watt hair dryer, direct the heat toward either of the thermis-
before performing maintenance of any kind.
tors. Hold the heat source about 12 inches from the detector to avoid damage
1. Remove the detector cover by turning counterclockwise. (See Figure 5.)
to the plastic.
2. Vacuum the cover or use canned air to remove any dust or debris.
NOTE: For the above tests, the detector will reset only after the power source 3. Remove the top half of the screen/sensing chamber by lifting straight up
has been momentarily interrupted. It is not necessary to reset the model (Figure 5).
4WITAR-B, when smoke is used to initiate the alarm. 4. Vacuum or use canned air to remove any dust or particles that are pres-
ent on both chamber halves.
When testing the 4WITAR-B model, pressing the test switch will result in a
5. Replace the top half of the screen/sensing chamber by aligning the arrow
non-latching local alarm that does not alarm at the control panel. Once the
on the screen/sensing chamber with the arrow on the housing. Press
test button is released, the unit will return to its standby condition. Only the
down firmly until the screen/sensing chamber is fully seated.
fixed-temperature heat sensor will cause the 4WITAR-B to initiate an alarm at
the panel. 6. Replace the detector cover by placing it over the screen/sensing chamber
and turning it clockwise until it snaps into place.
If a detector fails any of the above test methods, its wiring should be checked
7. Reinstall the detector and test. (See the Testing section.)
and it should be cleaned as outlined in the Maintenance section. If the detec-
8. Notify the proper authorities when the system is back in service.
tor still fails, it should be replaced.
Notify the proper authorities when the system is back in service.
FIGURE 5: REMOVING SCREEN/SENSING CHAMBER
LOOP VERIFICATION (MODELS 2WTR-B AND 2WTA-B ONLY)
Loop verification is provided by the EZ Walk loop test feature. This feature
REMOVABLE
is for use with i3 Series compatible control panels or the i3 Series 2W-MOD2 DETECTOR
module only. The EZ Walk loop test verifies the initiating loop wiring and COVER
provides visual status indication at each detector. Refer to System Sensor lit-
erature for further information on the 2W-MOD2.
SCREEN/SENSING
WARNING CHAMBER
The 2W-MOD2 has replaced the previous model number 2W-MOD. To ensure (TOP HALF)
proper EZ Walk Test capabilities, do not use the 2W-MOD with i3 model num-
bers 2WTR-B and 2WTA-B.

TABLE 3: EZ WALK TEST DETECTOR MODES

Green LED Red LED

Proper Operation Double blink 5 sec —
Out of Sensitivity — Double Blink 5 sec
Freeze Condition — Double Blink 10 sec DETECTOR HOUSING
S0111-00
NOTE: The EZ Walk loop test must not be used instead of alarm testing.

Please refer to insert for the Limitations of Fire Alarm Systems

THREE-YEAR LIMITED WARRANTY
System Sensor warrants its enclosed product to be free from defects in materials and TX 79936, USA. Please include a note describing the malfunction and suspected cause
workmanship under normal use and service for a period of three years from date of of failure. The Company shall not be obligated to replace units which are found to be
manufacture. System Sensor makes no other express warranty for the enclosed product. defective because of damage, unreasonable use, modifications, or alterations occurring
No agent, representative, dealer, or employee of the Company has the authority to in- after the date of manufacture. In no case shall the Company be liable for any consequen-
crease or alter the obligations or limitations of this Warranty. The Company’s obligation tial or incidental damages for breach of this or any other Warranty, expressed or implied
of this Warranty shall be limited to the replacement of any part of the product which is whatsoever, even if the loss or damage is caused by the Company’s negligence or fault.
found to be defective in materials or workmanship under normal use and service during Some states do not allow the exclusion or limitation of incidental or consequential dam-
the three year period commencing with the date of manufacture. After phoning System ages, so the above limitation or exclusion may not apply to you. This Warranty gives you
Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization number, specific legal rights, and you may also have other rights which vary from state to state.
send defective units postage prepaid to: Honeywell, 12220 Rojas Drive, Suite 700, El Paso

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 installa-
tion. 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.

4 I56-2170-009R
©2016 System Sensor. 06-10