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INTRODUCTION

The UN-WSM_RND is a fully supervised low-current 

wireless smoke detector that includes a two-

way wireless UN transceiver for reliable system 

operation.

The UN-WSM_RND is built with an advanced optical 

sensing photoelectric chamber, featuring an 

on-board horn.

The UN-WSM_RND has a unique ID code -

compatible with the UNii Wireless Interface Elite.

The UN-WSM_RND Smoke detector includes series 

of messages for full communication administration: 

Supervision, Tamper protection, Battery Status and 

Alarm.

OPERATION

FEATURES

RF SIGNAL INDICATION

 LEARNING PROCES

LEARNING & 

TEST BUTTONS

innovated security

INSTALLATION INSTRUCTIONS

UN-WSM_RND

UNII WIRELESS SMOKE DETECTOR ROUND

The Wireless smoke detector UN-WSM_RND trans-

mits the following events:

SUPERVISION 

- A periodical transmission every 7 

min. indicates detector’s connection.

ALARM 

- Alarm transmission triggered by the device 

indicating Smoke detection. Horn activated and Red 

LED blinking.

LOW BAT 

– Whenever the battery reaches a its low 

level (2.9V), a Battery Low signal will be sent to the 

UNii alarm system. Horn will beep and Red LED will 

blink every minute. When Battery level drops below 

Cut Off level (2.5V) the device will stop functioning 

and the Red LED will blink for 10 seconds and then 

turned Off.

TAMPER

 – When the device is removed from the 

ceiling, a tamper signal will be sent to the UNii alarm 

system. Replacing the detector cancels the tamper 

alarm.

• 

Photoelectric optical smoke chamber

• 

UN 2-way wireless

• 

GFSK with 5 frequencies & LBT

• 

Low current Technology

• 

Powered by a pack of 2 Lithium batteries 1.5V 

(Energizer L91)

• 

Battery life: ≥ 2 years

• 

Audible Warning by a built-in horn beeps once 

test mode, battery low or Alarm

• 

Frequencies Bands: 868 MHz or 916MHz

• 

Tamper Open/Close transmission

• 

Supervision transmission

• 

Battery status transmission

• 

Bi-Color LED indications for monitoring & 

Learning process

• 

Range up to 500m in open space.

Refer to the UNii Wireless Interface Elite installation 

instructions.

1. 

Make sure that the UNii keypad is on learning 

mode according to installation instruction.

2. 

Press the “pairing” button to power up the 

device (see fig. 1)

3. 

The device should register into the UNii Alarm 

system.

4. 

When registration process is successfully 

completed, the Green LED will constantly light 

ON for 3 seconds and then turn OFF.

WRONG INSTALLATION

 LOCATIONS

False alarms occur when smoke detectors are installed 

where they will not work properly. To avoid false alarms, 

do not install smoke detectors in the following situations:

• Combustion particles are by-products of something 

burning. Do not install smoke detectors in or near areas 

where combustion particles are present, such as kitchens 

with poor ventilation, garages where there may be vehicle 

exhaust, near furnaces, hot water heaters and space 

heaters. 

• Do not install smoke detectors less than 6 meters away 

from places where combustion particles are normally 

present. If a 6 meters distance is not possible try to install 

the detector as far away from the combustion particles as 

possible, preferably on the wall. To prevent false alarms, 

provide good ventilation in such places. 

• The path of fresh air intake. The flow of fresh air in 

and out can drive smoke away from the smoke detector 

reducing its efficiency.

 

• In damp or very humid areas or near bathrooms with 

showers. Moisture in humid air can enter the sensing 

chamber, then turns into droplets upon cooling, which can 

cause nuisance alarms. Install smoke detectors at least 3 

meters away from bathrooms. 

• In very cold or very hot areas, including unheated buil-

dings or outdoor rooms. If the temperature goes above 

or below the operating range of smoke detector, it will not 

work properly. 

• In very dusty or dirty areas, dirt and dust can build up 

on the detector’s sensing chamber, to make it overly 

sensitive. Additionally, dust or dirt can block openings to 

the sensing chamber and keep the 

detector from sensing smoke. 

• Near fresh air vents or very drafty areas like air conditio-

ners, heaters or fans. Fresh air vents and drafts can drive 

smoke away from smoke detectors. 

• In “Dead Air” spaces like at the top of a peaked roof, or 

in the corners between ceilings and walls. Dead air may 

prevent smoke from reaching a detector. 

• In insect-infested areas. If insects enter a detector’s 

sensing chamber, they may cause a nuisance alarm. 

Where bugs are a problem, get rid of them before instal-

ling the detector.

• Near fluorescent lights, electrical “noise” from fluores

-

cent lights may cause nuisance alarms. Install smoke 

detectors at least 1.5 meter from such lights.

The UNii keypad has a “RF Signal Strength 

Indication” in order to help the installer to define the 

best location for the detector from RF perspective.

The indication values are “excellent”, “strong”, “poor” 

or “unknown”. If this indication value is “poor” or 

“unknown”, it is a sign for a weak or no RF link and it 

is recommended to find a better installation for the 

UN-WSM_RND.

INSTALLATION

LOCATIONS

Here are few useful tips for complete coverage in 

residential units or small buildings:

• 

Install a smoke detector on every floor of mul

-

ti-floor home, apartment or small building.

• 

Install a smoke detector in the hall downstairs 

near de stairs.

• 

Install smoke detectors at both ends of 

bedroom hallway if hallway is more than 12m 

long.

• 

Install a smoke detector inside every room 

where one sleeps with the door partly or com-

pletely closed, since smoke could be blocked 

by the closed door and a hallway alarm may 

not wake up the sleeper if the door is closed.

• 

Install basement detectors at the bottom of the 

basement stairwell.

• 

Install second-floor detectors at the top of the 

first-to- second floor stairwell.

• 

Be sure no door or other obstruction blocks the 

path of smoke to the detector.

• 

Install smoke detectors as close to the center 

of the ceiling as possible. If this is not practical, 

put the detector on the ceiling, at least 10 cm 

away from any wall or corner.

1. Hold the mounting bracket against the ceiling and     

    mark the center of each slot.

    Drill 2 holes and install the bracket with the screws    

    (see Figure 3-A).

2. Verify the Smoke detector is paired to the control   

    panel by pressing the TEST button (see below     

    Figure) and verify receiving suitable message on   

    the Application / Base.

3. Push the Smoke detector toward the bracket      

    and turn it clockwise to adjust the detector to the    

    bracket (see Figure 3-B).

MOUNTING THE

DETECTOR

Figure 2

Tamper Switch

TEST/MUTE 

BUTTON

B

A

Figure 1

Figure 3

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