Mircom i3 Series Photoelectric Smoke Detectors Owner’s Manual

Mircom i3 Series Photoelectric Smoke Detectors

Description

The i3™ series smoke detectors represent a significant advancement in conventional detection. The i3 family is founded on three principles: Installation Ease, Intelligence, and Instant Inspection.

Installation Ease
The i3 line redefines installation ease with its plug-in design. This allows an installer to pre-wire the bases included with the heads. The large wire entry port and in-line terminals provide ample room for neatly routing the wiring inside the base. The base accommodates a variety of back box mounting methods as well as direct mounting with drywall anchors. To complete the installation, i3 heads plug-in to the base with a simple Stop-Drop ‘N Lock action.

Intelligence
i3 detectors offer a number of intelligent features to simplify testing and maintenance. Drift compensation and smoothing algorithms are standard with the i3 line, to minimize nuisance alarms. When connected to the 2W-MOD2 loop test/maintenance module, or a panel equipped with the i3 protocol, 2-wire i3 detectors are capable of generating a remote maintenance signal when they are in need of cleaning. This signal is indicated via an LED located at the module and the panel. To read the sensitivity of i3 detectors, the SENS-RDR is a wireless device that displays the sensitivity in terms of percent per foot obscuration.

Instant Inspection
The i3 series provides wide angle red and green LED indicators for instant inspection of the detector condition, indicating: normal standby, out-of- sensitivity, alarm, or freeze trouble conditions. When connected to the 2WMOD2 loop test/maintenance module or a panel with the i3 protocol, the EZ Walk loop test feature is available on 2-wire i3 detectors. This feature verifies the initiating loop wiring by providing LED status indication at each detector.

Features

• Plug-in detector line – mounting base included
• Large wire entry port
• In-line terminals with SEMS screws
• Mounts to octagonal and single-gang backboxes, 4-square backboxes, or direct to ceiling
•  Stop-Drop ‘N Lock™ attachment to base
• Removable cover and chamber for easy cleaning
• Built-in remote maintenance signaling
• Drift compensation and smoothing algorithms
• Simplifi ed sensitivity measurement
• Wide angle, dual color LED indication
• Loop testing via EZ Walk feature
• Built-in test switch

Engineering Specifications

Smoke detector shall be an i3 Series model listed to Underwriters Laboratories UL 268 for Fire Protection Signaling Systems. The detector shall be a photoelectric type (model 2W-B, 4W-B) or a combination photoelectric/ thermal (model 2WT-B, 4WT-B) with thermal sensor rated at 135°F (57.2°C). 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 pre-wiring 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 (model 2WT-B, 4WT-B) 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.

Tamper-Resistant Feature

Wiring Diagrams

Electrical Specifications

• Operating Voltage

  • Nominal: 12/24 V non-polarized
  • Min.: 8.5 V
  • Max.: 35 V

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

• Standby Current

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

• Maximum Alarm Current

  • 2-wire: 130 mA limited by control panel
  • 4-wire: 20 mA @12V, 23mA @ 24V

• 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

LED Modes

Power Up Sequence for LED Indication

Physical Specifications

• Operating Temperature Range

  • 2W-B and 4W-B:
  • 32°F–120°F (0°C–49°C)
  • 2WT-B and 4WT-B:
  • 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
  2WT-B and 4WT-B only: 41°F (5°C)

• Sensitivity
  2.5%/ft. nominal

• Input Terminals
  14–22 AWG

• Dimensions (including base)

  • 5.3 inches (127 mm) diameter
  • 2.0 inches (51 mm) height

• Weight
  6.3 oz. (178 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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