WT4901/WT8901 Two-Way Wireless
Indoor Siren – Installation Instructions
Use this installation sheet along with the associated alarm system installation
manual for installation instructions and programming details. All instructions
specified within that manual must be observed.
The WT4901/WT8901 is a two-way wireless indoor siren. It sounds an alarm condi-
tion received via DSC wireless protocol from a compatible, two-way enabled security
panel (e.g., PC9155). After the WT4901/WT8901 is enrolled on the security panel, it
is capable of receiving commands from the panel for sounding alarms and communi-
cating any required response, such as system status. The siren is capable of sounding
different alarm cadences (e.g., continuous burglary, pulsating fire, or temporal three
fire), bell squawks, and buzzer tones to suit the type of command it receives. The
WT4901/WT8901 provides a supervisory signal to the security panel, to ensure
that its wireless communication capability is functioning. In addition, it monitors
the case and wall tamper switch states, and the battery state. In the event of a low
battery or a tamper activation, the WT4901/WT8901 transmits the appropriate
signal to the security panel and, if applicable, provides an audible indication that
a system event has occurred. Up to four WT4901/WT8901 sirens can be enrolled
on, and supervised by the same security panel as separate units.
Specifications
Operating Temperature: -10°C to +55°C (14°F to 131°F)
Temperature range for UL/ULC: 0°C to +49°C
Relative Humidity: 0 to 93% R.H., non-condensing
Operating Frequency: 433.92MHz , 868 MHz (WT8901 only)
Batteries: (4) AA 1.5V Alkaline (Energizer, E91)
Battery Life: 2 years (typical usage)
Low Battery Level: 4.2 V, pre-determined
Alarm Signals – Output Level: 85dB @ 3m(high volume)
Other Signals – Output Level: 65dB @ 3m(medium volume)
Compatible control panels: PC9155-433/868, PC9155D-433/868, PC9155G-433/
868 (-868 for WT8901 only) Only model WT4901 is UL and ULC listed.
Out of the Box:
WT4901or WT8901; Installation sheet; hardware pack: (3 screws and 3 plastic
anchors); 4 AA batteries
Two-Way Wireless Siren Enrollment
The WT4901/WT8901 serial number is only used when the indoor siren is enrolled
and powered up. Enrolling the WT4901/WT8901 permits it to communicate with
the control panel. The installer can activate the indoor siren by Quick Enrollment
or Serial Number Programming, see below. NOTE: Make sure the Keypad is set up
before activating the indoor siren.
Quick Enrollment
1. Enter the enrollment mode through installer programming, see section [898] in
the alarm system installation guide.
2. Power up the indoor siren. If it is already powered up, press and hold the test
button for 2 seconds (the siren will beep.)
3. The indoor siren sends a request to the security panel to enroll on the system.
4. The Keypad displays the electronic serial number which must be confirmed
by pressing [*]. If the electronic serial number is incorrect, press [#] and
repeat this step.
5. Select the module number that the device should be enrolled as.
Siren #
[301]#1
ENG
[302]#2
[303]#3
[304]#4
NOTE: The electronic serial number is an 8-digit alphanumeric number
located on a sticker on the wireless device.
6. Repeat starting from step 2 to enroll each additional indoor siren.
Serial Number Programming
1. Enter the enrollment mode through installer programming, see section [804] in
the alarm system installation guide.
2. Select the module number that the device will be enrolled as. See sections
[301]-[304] for sirens.
3. Enter the serial number using the Keypad.
Placement Test
Perform a placement test to ensure there is sufficient signal strength for proper
communication between the security panel and the siren location.
1. Place the security panel into placement test, see section [906].
2. Start the test by tampering and restoring the siren being tested, or pressing and
holding the Test button for 2 seconds (the siren will give a beep).
3. The siren will respond with one beep if the location is "Good" or three beeps if
the siren is at a "Bad" location.
Physical Installation
The indoor siren is mounted to a flat surface such as drywall, or any variety of
other surfaces with the supplied hardware.
NOTE: When mounting the WT4901/WT8901 on drywall the use of the plastic
anchors is mandatory. NOTE: Do not mount over a single gang electrical box.
1. Open the WT4901/WT8901 by inserting a screwdriver into the slots and gently
prying on the front cover until it separates from the backplate.
2. If the batteries are not installed, install them as shown in the polarity indicated
by the engraving.
3. Position the backplate on a flat mounting surface and mark this location.
4. Secure the backplate to the mounting surface with all the screws provided.
5. Hinge the front cover to the backplate carefully, to correctly align it with the
tamper switch, then snap it onto the backplate. The wall tamper switch must
remain closed when the indoor siren is mounted.
NFPA72 Mounting Requirements (USA)
If ceiling heights allow, wall-mounted appliances shall have their tops above the
finished floors at heights of not less than 2.30 m (90 in.) and below the finished
ceilings at distances of not less than 150 mm (6 in.). Mounting heights other than
those shall be permitted by the authority having jurisdiction provided the sound
pressure level requirements are met.
Test Button
The test button activates the local siren for 4 seconds. Press and hold the siren test
button, located at the front of the WT4901/WT8901, for 5 seconds to verify the
indoor siren is functioning. If it is, the siren will sound at medium volume for 2
seconds, followed by 2 seconds at full volume. The WT4901/WT8901 does not
necessarily have to be enrolled on a system to perform this test.
Battery Replacement
The security panel will indicate when the batteries are low and require replacement. To
Serial Number
determine which siren has a low battery, press and hold the test button for 5 seconds. If the
siren sounds for 4 seconds, the batteries are good. If the siren doesn't sound, the batteries
are low. After removing the batteries, wait 30 seconds before inserting replacement batter-
ies. Energizer 1.5V AA alkaline batteries can be used. REPLACE ONLY WITH THE TYPE
RECOMMENDED BY THE MANUFACTURER. Open the front cover and install the
batteries as shown in the polarity indicated by the engraving. If the batteries are installed
incorrectly, in the reverse polarity, the indoor siren will not work. Under typical use the
WT4901/WT8901 is capable of operating on battery power alone without having to change
the batteries for a minimum of two years. Do not try to recharge these batteries.
Disposal of used batteries must be made in accordance with the waste
recovery and recycling regulations in your area.
Indoor Siren Front Cover
Test
Button
Buzzer
Configuration and Testing
If necessary, WT4901/WT8901 options can be set up to suit desired system
responses. By means of the keypad interface, the installer has access to the siren
programming menus supported by the main panel e.g., wireless siren options (see
table below), siren enrollment and placement test activation menu.
NOTE:
pliant installations
Program Section
Sounder:
Global Sounder:
Indoor Siren Backplate
Mounting
Holes (2)
Test Button
Tamper
Battery (4) AA
1.5V Alkaline
Mounting Hole
Slots for removing front cover
Do Not set the WT4901 to follow Entry/Exit delay for SIA CP-01 com-
.
Options
1. Alarm Enabled
Siren#1[311]
2. Buzzer Notification
Enabled
Siren#2[312]
3. Door Chime Enabled
Siren#3[313]
4. Trouble Beeps Enabled
Siren#4[314]
5. Bell Squawks Enabled
6. For Future Use
7. Buzzer Alarms follow BTO
8. Siren Tamper Enabled
1. Tamper Activates Siren/
Strobe
Sirens#1-4
[320]
2. Pre-Alarm Signal Enabled
3. to
8. For Future Use
1. Alarm Disabled
2. Buzzer Notification Dis-
abled
3. Door Chime Disabled
4. Trouble Beeps Disabled
5. Bell Squawks Disabled
6. For Future Use
7. Buzzer Alarms follows
Alarm Condition
8. Siren Tamper Disabled
1. Tamper does not Acti-
vate Siren/Strobe
2. Pre-Alarm Signal Dis-
abled
3. to
8. For Future Use