Mircom MIX-2251APA Intelligent Photoelectric Smoke Sensors Installation Guide
- June 9, 2024
- Mircom
Table of Contents
Mircom MIX-2251APA 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-2251APA; 32°F to 100°F (0°C to 38°C) MIX-2251TAPA and MIX-2251TMAPA
- Heat Sensor: 135°F Fixed Temperature Electronic Thermistor
- Height: 2.0˝ (51 mm) installed in B210LPA Base
- Diameter: 6.1˝ (155 mm) installed in B210LPA 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 CAN/ULC-S524.
General Description
Models MIX-2251APA, MIX-2251TAPA and MIX-2251TMAPA are plug-in type smoke
sensors that combine a photoelectronic sensing chamber with addressable-analog
communications. The sensors transmit an analog representation 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 RA400ZA/RA100ZA). Models
MIX-2251TAPA and MIX-2251TMAPA
combine a photoelectronic sensing chamber and 135°F (57.2°C) fixed temperature
heat detector. The MIX-2251APA, MIX-2251TAPA and MIX-2251TMAPA require
compatible addressable communications to function properly. Connect these
sensors to listed-compatible control panels only.
Spacing Mircom recommends spacing sensors in compliance with CAN/ULC-S524. In low air flow applications with smooth ceilings, space sensors 30 feet apart. For specific information regarding sensor spacing, placement, and special applications, refer to CAN/ULC-S524 or the System Smoke Detector Application Guide, available from Mircom.
Wiring Guide All wiring must be installed in compliance with the Canadian 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,
- Set the desired address on the sensor address switches,
- 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 during shipping. Dust covers must be removed before the sensors can
sense
smoke. Remove sensors prior to heavy remodeling or construction.
Wiring diagram
Rotary decade address switches:
Tamper-Resistance Models MIX-2251APA, MIX-2251TAPA and MIX-2251TMAPA 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
CAN/ULC-S536.
The sensor can be tested in the following ways:
Functional: Magnet Test (P/N M02-04-01 or M02-09-00) This sensor can be functionally tested with a test magnet. The test magnet 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 sensor 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.
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 described in the GEMINI 501 manual. Using the bowl shaped applicator, apply aerosol until the panel alarms. Additionally, canned aerosol simulated 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. When used properly, the canned smoke agent will cause the smoke detector to go into alarm. Refer to the manufacturer’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-2251TMAPA, smoke entry testing should be performed immediately following the magnet test. Magnet test initiates an approximately 10 minute period when the detector’s signal processing software routines are not active. Failure to first perform the magnet test will introduce a time delay before the detector alarms.
Direct Heat Method (Hair Dryer of 1000-1500 watts) MIX-2251TAPA and MIX- 2251TMAPA 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 damaging the plastic housing. The detector will reset only after it has had sufficient 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 replaced. When testing is complete, restore the system to normal operation and notify the proper authorities that the system is back in operation.
Test Magnet Position
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 unwanted 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-2251TAPA and MIX-2251TMAPA 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.
Sensor assembly
Special Note Regarding Smoke Detector Guards Smoke detectors are not to be used with detector guards unless the combination 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.
This Class B digital apparatus complies with Canadian ICES-003.