Mircom I56-3311 Intelligent Photoelectric Smoke Sensors Instruction Manual
- June 9, 2024
- Mircom
Table of Contents
Mircom I56-3311 Intelligent Photoelectric Smoke Sensors
Specifications
- Operating Voltage Range: 15 to 32 VDC
- Average operating Current: 300μA @ 24 VDC (one communication every 5 seconds with LED blink enabled)
- Maximum Alarm Current (LED on:) 6.5 mA @ 24 VDC
- Operating Humidity Range: 10% to 93% Relative Humidity, Non-condensing
- Operating Temperature Range: 32°F to 120°F (0°C to 49°C) MIX-2251AP; 32°F to 100°F (0°C to 38°C) MIX-2251TAP and MIX-2251TMAP
- Heat Sensor: 135°F Fixed Temperature Electronic Thermistor
- Height: 2.0˝ (51 mm) installed in B210LP Base
- Diameter: 6.1˝ (155 mm) installed in B210LP Base; 4.1˝ (104 mm) installed in B501 Base
- Weight: 5.2 oz. (147 g)
Before Installing
This sensor must be installed in compliance with the control panel system
installation manual. The installation must meet the requirements of the
Authority
Having Jurisdiction (AHJ). Sensors offer maximum performance when installed in
compliance with the National Fire Protection Association (NFPA); see NFPA 72.
GENERAL DESCRIPTION
Models MIX-2251AP, MIX-2251TAP and MIX-2251TMAP are plug-in type smoke sensors
that combine a photoelectronic sensing chamber with ad-dressable-analog
communications. The sensors transmit an analog rep-resentation of smoke
density over a communication line to a control panel. Rotary-decade switches
are provided for setting the sensor’s address.
Two LEDs on the sensor are controlled by the panel to indicate sensor status.
An output is provided for connection to an optional remote LED annunciator
(P/N RA400Z/RA100Z). Models MIX-2251TAP and MIX-2251TMAP combine a
photoelectronic sensing chamber and 135°F (57.2°C) fixed temperature heat
detector.
The MIX-2251AP, MIX-2251TAP and MIX-2251TMAP require compatible addressable communications to function properly. Connect these sensors to listed- compatible control panels only.
SPACING
Mircom recommends spacing sensors in compliance with NFPA 72. In low airflow
applications with smooth ceilings, space sensors 30 feet apart. For specific
information regarding sensor spacing, placement, and special applications,
refer to NFPA 72 or the System Smoke Detector Application Guide, available
from Mircom.
Duct Applications: MIX-2251AP and MIX-2251TAP are listed for use in ducts. See
Duct Applications Guide A05-1004-XX for details on pendant mount applications.
Note: These products are not listed for use inside duct smoke detectors.
WIRING GUIDE
All wiring must be installed in compliance with the National Electrical Code,
applicable local codes, and any special requirements of the Authority Having
Jurisdiction. Proper wire gauges should be used. The installation wires should
be color-coded to limit wiring mistakes and ease system troubleshooting.
Improper connections will prevent a system from responding properly in the
event of a fire.
Remove power from the communication line before installing sensors.
- Wire the sensor base (supplied separately) per the wiring diagram, Figure 1.
- Set the desired address on the sensor address switches, see Figure 2.
- Install the sensor into the sensor base. Push the sensor into the base while turning it clockwise to secure it in place.
- After all sensors have been installed, apply power to the control unit and activate the communication line.
- Test the sensor(s) as described in the TESTING section of this manual
CAUTION
Dust covers provide limited protection against airborne dust particles dur-
ing shipping. Dust covers must be removed before the sensors can sense smoke.
Remove sensors prior to heavy remodeling or construction.
TAMPER-RESISTANCE
Models MIX-2251AP, MIX-2251TAP and MIX-2251TMAP include a tamper-resistant capability that prevents their removal from the bracket without the use of a tool. Refer to the base manual for details on making use of this capability.
TESTING
Before testing, notify the proper authorities that the system is undergoing
maintenance, and will temporarily be out of service. Disable the system to
prevent unwanted alarms.
All sensors must be tested after installation and periodically thereafter.
Testing methods must satisfy the Authority Having Jurisdiction (AHJ). Sensors
offer maximum performance when tested and maintained in compliance with NFPA
72.
The sensor can be tested in the following ways:
-
A. Functional: Magnet Test (P/N M02-04-01 or M02-09-00)
This sensor can be functionally tested with a test magnet. The test mag-net electronically simulates smoke in the sensing chamber, testing the sensor electronics and connections to the control panel.- Hold the test magnet in the magnet test area as shown in Figure 3.
- The sensor should alarm the panel.
Two LEDs on the sensor are controlled by the panel to indicate sen-sor status. Coded signals, transmitted from the panel, can cause the LEDs to blink, latch on, or latch off. Refer to the control panel technical documentation for sensor LED status operation and expected delay to alarm.
-
B. Smoke Entry: Aerosol Generator (Gemini 501)
The GEMINI model 501 aerosol generator can be used for smoke entry testing. Set the generator to represent 4%/ft to 5%/ft obscuration as de-scribed in the GEMINI 501 manual. Using the bowl shaped applicator, apply aerosol until the panel alarms. Additionally, canned aerosol simu-lated smoke (canned smoke agent) may be used for smoke entry testing of the smoke detector. Tested and approved aerosol smoke products are the Smoke Detector Tester model 25S available from Home Safeguard Industries and Chekkit Smoke Detector Tester models CHEK02 and CHEK06 available from SDi. When used properly, the canned smoke agent will cause the smoke detector to go into alarm. Refer to the man- ufacturer’s published instructions for proper use of the canned smoke agent.
CAUTION
Canned aerosol simulated smoke (canned smoke agent) formulas will vary by manufacturer. Misuse or overuse of these products may have long term adverse effects on the smoke detector. Consult the canned smoke agent manufacturer’s published instructions for any further warnings or caution statements.
For MIX-2251TMAP, smoke entry testing should be performed immedi-ately following the magnet test. Magnet test initiates an approximately 10 minute period when the detector’s signal processing software rou-tines are not active. Failure to first perform the magnet test will introduce a time delay before the detector alarms.
C. Direct Heat Method (Hair Dryer of 1000-1500 watts) MIX-2251TAP and MIX- 2251TMAP only
A hair dryer of 1000-1500 watts should be used to test the thermistors. Direct the heat toward either of the two thermistors, holding the heat source approximately 12 inches from the detector in order to avoid dam-aging the plastic housing. The detector will reset only after it has had suf-ficient time to cool. Make sure both thermistors are tested individually.
A sensor that fails any of these tests should be cleaned as described under
CLEANING, and retested. If the sensor fails after cleaning, it must be re-
placed.
When testing is complete, restore the system to normal operation and notify
the proper authorities that the system is back in operation.
CLEANING
Before removing the detector, notify the proper authorities that the smoke
detector system is undergoing maintenance and will be temporarily out of
service. Disable the zone or system undergoing maintenance to prevent un-
wanted alarms.
- Remove the sensor to be cleaned from the system.
- Remove the sensor cover by pressing firmly on each of the four removal tabs that hold the cover in place.
- Vacuum the screen carefully without removing it. If further cleaning is required continue with Step 4, otherwise skip to Step 7.
- Remove the chamber cover/screen assembly by pulling it straight out.
- Use a vacuum cleaner or compressed air to remove dust and debris from the sensing chamber.
- Reinstall the chamber cover/screen assembly by sliding the edge over the sensing chamber. Turn until it is firmly in place.
- Replace the cover using the LEDs to align the cover and then gently pushing it until it locks into place. Make sure that the thermistors do not become bent under the cover on MIX-2251TAP and MIX-2251TMAP models.
- Reinstall the detector.
- Test the detector as described in TESTING.
- Reconnect disabled circuits.
- Notify the proper authorities that the system is back on line.
FIGURE 4. SENSOR ASSEMBLY:
SPECIAL NOTE REGARDING SMOKE DETECTOR GUARDS
Smoke detectors are not to be used with detector guards unless the combina-
tion has been evaluated and found suitable for that purpose.
Please refer to insert for the Limitations of Fire Alarm Systems
FCC STATEMENT
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause Harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more
of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
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References
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