Pittway System Sensor SpectrAlert DS2475WAR User manual

D600-01-00 1 I56-1569-002R
SpectrAlert Dual Strobe
For use with the following 24-volt models:
DS2475WAR DS2475WCG DS2475RAR DS2475RCG
DS2475WAC DS2475WCB DS2475RAC DS2475RCB
DS2475WAG DS2475WGR DS2475RAG DS2475RGR
DS2475WAB DS2475WGB DS2475RAB DS2475RGB
DS2475WCR DS2475WBR DS2475RCR DS2475RBR
DS2475_ _ _
Right Side Lens Color
Left Side Lens Color
Housing Color: “W” for White, “R” for Red
Lens colors: “A” for Amber, “B” for Blue, “C” for Clear, “G” for green, “R” for Red
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
www.systemsensor.com
General Description
The SpectrAlert series notification appliances are designed to meet the
requirements of NFPA, The National Fire Alarm Code, and UL. Also, check
with your local Authority Having Jurisdiction for other codes or standards
that may apply.
This SpectrAlert DS2475 Strobe can be installed in systems using 24-volt
panels having DC or full-wave rectified (FWR) power supplies. The mod-
els can also be installed in systems requiring synchronization (module
MDL required) or systems that do not require synchronization (no module
required).
NOTICE: This manual shall be left with the owner/user of this equipment.
Power Supply Considerations
Panels typically supply DC filtered voltage or FWR (full-wave rectified)
voltage. The system design engineer must calculate the number of units
used in a zone based on the type of panel supply. Be certain the sum of
all the device currents do not exceed the current capability of the panel.
Calculations are based on using the device current found in the subsequent
charts and must be the current specified for the type of panel power sup-
ply used.
Wire Sizes
The designer must be sure that the last device on the circuit has sufficient
voltage to operate the device within its rated voltage. When calculating
the voltage available to the last device, it is necessary to consider the volt-
age drop due to the resistance of the wire. The thicker the wire, the less
the voltage drop. Generally, for purposes of determining the wire size nec-
essary for the system, it is best to consider all of the devices as “lumped”
on the end of the supply circuit (simulates “worst case”).
Typical wire size resistance:
18 AWG solid: Approximately 8 ohms/1,000 ft.
16 AWG solid: Approximately 5 ohms/1,000 ft.
14 AWG solid: Approximately 3 ohms/1,000 ft.
12 AWG solid: Approximately 2 ohms/1,000 ft.
Example: Assume you have 10 devices on a zone and each requires 50
mA average and 2000 Ft. of 14 AWG wiring (total length=outgoing
+return). The voltage at the end of the loop is 0.050 amps per device x
10 devices x 3 ohms/1,000 ft. x 2000 ft =3 volts drop.
Specifications
Voltage Range: 20 to 30 Volts DC or Full-Wave Rectified
with module: 21 to 30 Volts DC or Full-Wave Rectified
Flash Rate: 1 Flash Per Second
Operating Temperature: 32°F to 120°F (0°C to 49°C)
Light Output: 75 candela
Listings: UL S3593 (Strobe)
The same number of devices using 12 AWG wire will produce only 2 volts
drop. The same devices using 18 AWG wire will produce 8 volts drop.
Consult your panel manufacturer’s specifications, as well as SpectrAlert’s
operating voltage range to determine acceptable voltage drop
.
Note: If class “A”wiring is installed, the wire length may be up to 4 times
the single wire length in this calculation.
U.S. Patent Nos. 5,593,569;
5,850,178; 5,598,139; 6,049,446
Current Draws Per Strobe
DC FWR DC FWR DC FWR
169 220 140 191 115 174
AVERAGE CURRENT (mA)
24V Models
20V 24V 30V
DC FWR DC FWR DC FWR
460 560 450 570 420 620
PEAK CURRENT (mA)
24V Models
20V 24V 30V
DC FWR DC FWR DC FWR
190 230 220 290 290 370
IN RUSH CURRENT (mA)
24V Models
20V 24V 30V
Figure 1A. Powered by a 2-wire circuit:
System Operation: Non-Synchronized Devices
POWER
SUPPLY
TO NEXT
DEVICE
OR EOL
NOTE: Reversing polarity from power supply will stop powering one
strobe and start powering the other.
Figure 1B: Strobes
powered in tandem:
NOTE: Supply power must be
continuous for proper operation.
FACTORY
INSTALLED
WIRES
TO NEXT
DEVICE OR EOL
FACP

(+)
(—)
(+)
(—)
(+)
(—)
LEFT STROBE
POWER SUPPLY
(+)
(—)
(+)
(—)
(+)
(—)
RIGHT STROBE
POWER SUPPLY
TO NEXT
DEVICE
OR EOL
TO NEXT
DEVICE
OR EOL
D600-01-00 2 I56-1569-002R
The strobe will not work without power. The strobe gets its power from
the fire/security panel monitoring the alarm system. If power is cut off for
any reason, the strobe will not provide the desired visual warning.
NOTE: Strobes must be powered continuously for horn operation.
The signal strobe may not be seen. The electronic visual warning signal
uses an extremely reliable xenon flash tube. It flashes at least once every
second. The strobe must not be installed in direct sunlight or areas of high
light intensity (over 60 foot candles) where the visual flash might be dis-
regarded or not seen. The strobe may not be seen by the visually impaired.
The signal strobe may cause seizures. Individuals who have positive
photic response to visual stimuli with seizures, such as persons with
epilepsy, should avoid prolonged exposure to environments in which
strobe signals, including this strobe, are activated.
The signal strobe cannot operate from coded power supplies. Coded
power supplies produce interrupted power. The strobe must have an unin-
terrupted source of power in order to operate correctly. System Sensor rec-
ommends that the horn and signal strobe always be used in combination
so that the risks from any of the above limitations are minimized.
The Limitations of Strobes
WARNING
Figure 2. Powered by a 4-wire circuit to provide independent left
strobe and right strobe operation (Remove factory installed
jumpers, see Figure 1B):
NOTE: Strobes must be powered continuously for proper operation.
Figure 3: Synchronizing strobes using MDL:
Three-Year Limited Warranty
System Sensor warrants its enclosed strobe or strobe 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 strobe. No agent, representative, dealer, or
employee of the Company has the authority to increase or alter the obli-
gations or limitations of this Warranty. The Company’s obligation of this
Warranty shall be limited to the repair or replacement of any part of the
strobe 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 Sensor, Repair 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 repair or 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 conse-
quential 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.
Mounting
If you would prefer to switch the lens colors, the strobe modules are field-
reversible. (Fig. 4)
To reverse the strobe module: insert screwdriver, as shown in Fig. 4, to
unlock snap. While pushing in the screwdriver, pull back on the strobe
module. Hinge the strobe module, disengage the Locking Rib, and lift the
module away from the mounting plate. Turn the module so that it is
upside down from its original position, re-insert the module into the
mounting plate (be sure to insert the Locking Rib into the slot), and press
the module into the mounting plate. The strobe module will make a
“click”when it has locked into place. Turn entire assembly so that the
lenses are on the bottom. The unit can now be mounted.
The unit can be mounted to a single-gang back box, or to a 4″x 4″back
box, using the mud ring provided.
1. Complete field wiring.
2. Align dual strobe over back box
and secure with screws.
2-INCH BACK BOX
#6-32
PAN HEAD
SCREWS
INSERT SCREWDRIVER INSERT SCREWDRIVER
POWER
SUPPLY MDL RED
STROBES
POWER
SUPPLY MDL AMBER
STROBES
TO NEXT
DEVICE
OR EOL
TO NEXT
DEVICE
OR EOL
Please refer to insert for the Limitations of Fire Alarm Systems
INSERT SCREWDRIVER INSERT SCREWDRIVER
LOCKING RIB
INSERT SCREWDRIVER
TO REMOVE
Figure 4: Reversing the strobe module: