Mircom i3 Series Sounder and Relay Smoke Detectors Owner’s Manual

Mircom i3 Series Sounder and Relay Smoke Detectors

Description

The i3™ sounder and relay smoke detectors apply the guiding principles of installation ease, intelligence, and instant inspection in a series of specialty conventional devices.

Installation ease
Throughout the i3 series, installation is simple with its installer-friendly base and plug-in design. The base accommodates a broad range of back box and direct mounting options, and provides ample space for prewiring the installation. To complete the installation, the i3 detector plugs into its base with a simple Stop Drop ’N Lock action.

Intelligence
To reduce the likelihood of nuisance alarms, all i3 detectors are equipped with both drift compensation and smoothing algorithms. These capabilities minimize both short- and long-term causes of nuisance alarms such as RF interference and dust accumulation. When connected to the 2W-MOD2 loop test /maintenance module or an i3 Ready™ panel, 2-wire i3 detectors can generate a remote maintenance signal when they are in a maintenance or freeze trouble condition. To measure the sensitivity of any i3 detector, the SENS-RDR displays the reading, in terms of percent per foot obscuration, within seconds.

Instant inspection
The i3 line’s red and green LEDs simplify local status indication during power-up, standby, alarm, maintenance and freeze trouble conditions. When in alarm, i3 sounder models generate an 85dB temporal tone. If connected to the RRS-MOD reversing relay/synchronization module, all i3 sounders on the loop will activate when one detector is in alarm. Additionally, the RRS-MOD synchronizes the output of all i3 sounders, to ensure a clear audible signal. Should the application call for differentiating between a local and a general alarm, the i3 line offers an isolated thermal model, which initiates a local alarm when smoke is detected, and a general alarm when the thermal sensor is activated.

Features

• Full line of options including:
  • 85 dB sounder
  • Form C relay
  • Isolated thermal sensor
• Maintains the i3 feature set including:
  • Plug-in design
  • Mounting base included
  • In-line terminals
  • Mounts to octagonal, single gang and 4-square back boxes, or direct to the ceiling
  • Stop-Drop ’N Lock ™ attachment to the base
  •  Removable cover and chamber
  • Remote maintenance signaling
  • Drift compensation and smoothing algorithms
  • Simplifi ed sensitivity measurement
  • Dual color LEDs
  •  EZ Walk loop testing

Engineering Specifications

• The smoke detector shall be an i3 Series model listed to Underwriters Laboratories UL 268 for Fire Protection Signaling Systems. The detector shall be a combination photoelectric/thermal equipped with a sounder (model 2WTA-B, 4WTA-B), a Form C relay (model 2WTR-B), a combination sounder/relay (model 4WTAR-B) or an isolated thermal/sounder/relay (model 4WITAR-B). The detector shall include a mounting base for mounting to 3½-inch and 4-inch octagonal, single gang, and 4-inch square back boxes with a plaster ring, or direct mount to the ceiling using drywall anchors.
• Wiring connections shall be made by means of SEMS screws. The detector shall allow prewiring of the base and the head shall be a plug-in type. The detector shall have a nominal sensitivity of 2.5% per foot nominal as measured in the UL smoke box. The detector shall be capable of automatically adjusting its sensitivity by means of drift compensation and smoothing algorithms. The detector shall provide dual color LED indication which blinks to indicate power up, normal standby, out of sensitivity, alarm, and freeze trouble conditions. When used in conjunction with the 2W-MOD2 module, 2-wire models shall include a maintenance signal to indicate the need for maintenance at the alarm control panel, and shall provide a loop testing capability to verify the circuit without testing each detector individually. When used in conjunction with the RRS-MOD module, all i3 sounder models on a loop shall sound when one alarms, all shall be synchronized, and all sounders may be silenced from the panel.

Electrical Specifications

• Operating Voltage

  • Nominal: 12/24 V non-polarized
  • 2-wire: 8.5 V – 35 V
  • 4-wire: 10 V – 35 V

• Maximum Ripple Voltage
  30% of applied (peak to peak)

• Standby Current

  • 2-wire: 50 μA maximum average
  • 4-wire: 50 μA maximum average

• Peak Standby Current

  • 2-wire: 100 μA
  • 4-wire: n/a

• Alarm Contact Ratings

  • 2-wire: n/a
  • 4-wire: 0.5 A @ 30V AC/DC

• Form C Contact Ratings
  2A@ 30V AC/DC

• Maximum Alarm Current

  • 2-wire: 130 mA limited by control panel
  • 4-wire: 4WTA-B, 4WTR-B: 35 mA 4WTAR-B, 4WITAR-B: 50 mA

LED Modes

Power Up Sequence for LED Indication

Physical Specifications

• Operating Temperature Range: 32°F–100°F (0°C–37.8°C)

• Operating Humidity Range: 0 to 95% RH non-condensing

• Thermal Sensor: 135°F (57.2°C) fi xed

• Freeze Trouble: 41°F (5°C)

• Sensitivity: 2.5%/ft. nominal

• Input Terminals: 14–22 AWG

• Dimensions (including base)

  • 5.3 inches (134 mm) diameter
  • 2.0 inches (51 mm) height

• Weight: 7.1 oz. (200 grams)
  Mounting

  • 3½-inch octagonal back box
  •  4-inch octagonal back box
  • Single gang back box
  • 4-inch square back box with a plaster ring
  • Direct mount to ceiling

Ordering Information

ABOUT COMPANY

• Canada
  • 25 Interchange Way
  • Vaughan, Ontario L4K 5W3
  • Telephone: 905-660-4655
  • Fax: 905-660-4113
• U.S.A.
  • 4575 Witmer Industrial Estates
  • Niagara Falls, NY 14305
  • Toll Free: 888-660-4655
  • Fax Toll Free: 888-660-4113
• Web page: http://www.mircom.com
• Email: mail@mircom.com

References

• Fire Alarm Resources | Download fire alarm documents
• Mircom - Smart Buildings. Smarter Solutions.

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