3120b – BRK electronic P H O T O & I O N 3120B User Manual

Page 2

brkelectronics.com

A R C H I T E C T U R A L A N D E N G I N E E R I N G S P E C

I N S T A L L A T I O N O F A L A R M

The smoke alarm shall be a BRK Model 3120B and shall provide at a minimum the
following features and functions:
1. Two smoke sensing chambers - photoelectric and ionization.
2. Powered by 120V AC, 60Hz and have a monitored battery backup and a solid

state piezo horn rated at 85dB at 10 ft. and shall be capable of self restoring.

3. A visual power-on indicator to confirm unit is receiving AC power or has switched

to battery backup mode.

4. Two Latching features: Alarm Latch to easily identify initiating alarm after alarm

condition has subsided. Low battery latch: to visually identify which unit is in low

battery condition. Two Silence Features: Alarm Silence to temporarily silence

nuisance alarms. Low Battery Silence to silence low battery chirp for up to 8 hours.

5. Two Locking features - tamper resistant locking pins that lock battery drawer

and/or alarm to mounting bracket.

6. The unit shall be capable of operating between 40°F (4°C) and 100°F (38°C) and

relative humidity between 10% and 95%.

7. The unit shall have a plug in connector and be capable of interconnection of up to

18 alarms, 12 of which can be smoke alarms.

8. The unit shall have a gasketless base for easy installation and be capable of

keeping alarm secure over a wide rotation range to allow for true alarm

alignment.

9. The unit shall at a minimum meet the requirements of UL217, CSFM,

NFPA 72 and the ICC.

S H I P P I N G S P E C S :

T E C H N I C A L S P E C S

Individual Carton Dimensions

5.13"L x 2.38"W x 5.13"H

Weight

0.73 lbs.

Cube

0.04 ft3

UPC

0 29054 00710 0

Master Carton Dimensions

10.75"L x 7.88"W x 11.06"H

Master Pack

Weight

9.3 lbs.

Cube:

0.54 ft3

I2of5:

200 29054 00710 4

Pallet Information

Cases per Layer

Number of Layers:

Cases per Pallet:

Units per pallet:

1,056

Cube:

54.0 ft3

Weight:

879 lbs.

Alarm Dimensions:

5.0” dia x 2.0”H

Weight:

9.5 oz

Operating Voltage:

120V AC 60Hz with two 1.5V AA battery backup

Operating Current:

0.07 amps (standby/alarm)

Temperature Range:

40°F (4°C) to 100°F (38°C)

Humidity Range:

10% to 95% relative humidity (RH)

Audio Alarm:

85dB at 10 feet

Test/Silence:

Electronically simulates smoke condition, causing the unit

to alarm. Press and hold test/silence button

Alarm Reset:

Automatic when smoke clears

Interconnections:

Up to 18 units of First Alert or BRK Smoke, CO and

Heat Alarms. Maximum of 12 smoke alarms. See

user’s manual for details.

Smoke Sensors:

Photoelectric and Ionization

Indicator Lights/Sounds:
AC Power:

Constant Green LED

DC Power:

Intermittent Green LED

Local Alarm:

Red LED flashes rapidly

Remote Alarm:

Red LED off

Alarm Latch:

LED flashes red 2 sec on, 2 sec off after local alarm stops

Low Battery Latch:

LED flashes green 2 sec on, 2 sec off

Listing:

Listed to UL217 Standard

First Alert is a registered trademark of the First Alert Trust
BRK is a registered trademark of BRK Brands, Inc.
CM3037

CAT.

3120B

Installation of this smoke alarm must conform to all local electrical
codes and Article 760 of the National Electrical Code (NFPA 70)
and NFPA 72. Interconnected units must meet the following
requirements: wire gauge to be per local codes. It is
recommended that all units be on the same fuse or circuit
breaker. If local codes do not permit, be sure the neutral wire is
common to both phases.

BATTERY DRAWER LOCK

Remove Pin from

Mounting Bracket

Close Door. Insert Pin in Holes

through alarm and Battery Drawer

5.0"

TOP VIEW

SIDE VIEW

MOUNTING

BRACKET

2.0"

THE PARTS OF THIS SMOKE ALARM

A. Unswitched 120VAC 60 Hz source

B. To additional units; Maximum = 18 total
(Maximum 12 Smoke Alarms)

1. Smoke Alarm

5. Electrical Box

2. Ceiling or Wall

6. Neutral Wire (White)

3. Power Connector

7. Interconnect Wire (Orange)

4. Wire Nut

8. Hot Wire (Black)

1. Mounting bracket

2. Mounting Slots

3. Locking Pins

4. Hot (Black) AC Wire

5. Nuetral (White) AC Wire

6. Interconnect (Orange) Wire

7. Pull-out Battery Drawer

8. Quick-Connect Plug

678

4 3

}

4 3