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AutroSense Micra 10
Aspirating Smoke Detector
Installers Handbook
P/N 10-3519-505-AE10-01 (EN) • REV 03 • ISS 16NOV15
Copyright © 2015 UTC Fire & Security. All rights reserved.
Contact information
For contact information, see www.airsensetechnology.com.
European regulations for construction products
This section includes both regulatory information and a summary on the declared
performance according to the Construction Products Regulation 305/2011. For
detailed information refer to the product Declaration of Performance (DoP).
Certification
Certification body 0370
Manufacturer UTC CCS Manufacturing Polska Sp. Z o.o.
Ul. Kolejowa 24. 39-100 Ropczyce, Poland
Authorized EU manufacturing representative:
UTC Fire & Security B.V. Kelvinstraat 7, 6003 DH Weert,
Netherlands
Year of first CE marking 15
Declaration of Performance
number
360-3519-0299
EN 54 EN 54-20: 2006
Product identification See model number on product identification label
Intended use See DoP point 3
Essential characteristics See DoP point 9
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook i
Content
Important information iii
Advisory messages iv
EN 54-20 and UL installation v
Chapter 1 Product and component descriptions 1
Introduction 2
Available software for the detector 2
Specifications 3
Indicators 4
Inside the detector 5
Removable terminal block connections 6
Chapter 2 Installation and configuration 7
Introduction 8
Antistatic precautions 8
General installation guidelines 10
Docking station 10
Application 12
System design 12
Installation 17
Interfacing with fire alarm panels 21
Setting the detector address 23
Final installation 25
Removing the detector 26
Configuring the detector after installation 26
Connecting to a PC 28
Event log 30
Chapter 3 Commissioning 31
Introduction 32
Commissioning checklist 32
Precommissioning preparation 34
Acclimation period 34
Transport time verification 34
ASD System Performance Tests 34
Chapter 4 Troubleshooting 35
Troubleshooting the detector 36
Chapter 5 Maintenance 39
Introduction 40
Scheduled maintenance 40
Maintenance procedures 41
ii AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Glossary 45
Index 47
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook iii
Important information
Regulatory information
This equipment is Class III as defined in EN 60950 (i.e., this equipment is
designed to operate from Safety Extra Low Voltages and does not generate any
hazardous voltages).
As this equipment is part of a fire detection system, input power should be
supplied from an approved power supply conforming to EN 54-4 or UL/ULC and
FM3230 standards.
In order for the installation to conform to EN 54-20, pipes must conform at least
to EN 61386-1 Class 1131.
This product has been designed to meet the following requirements:
• NFPA 72 National Fire Alarm and Signaling Code
• UL 268 Smoke Detectors for Fire Alarm Signaling Systems
• UL 268A Smoke Detectors for Duct Applications
• UL 864 Control Units for Fire Protective Signaling Systems
• CAN/ULC-S524 Installation of Fire Alarm Systems
• ULC S527 Control Units for Fire Alarm Systems
• CAN/ULC-S529 Smoke Detectors for Fire Alarm Systems
System reacceptance test after reprogramming (UL/ULC and FM3230): To
ensure proper system operation, this system must be retested in accordance with
NFPA 72 after any programming change. Reacceptance testing is also required
after any addition or deletion of system components, and after any modification,
repair, or adjustment to system hardware or wiring.
Limitation of liability
To the maximum extent permitted by applicable law, in no event will UTCFS be
liable for any lost profits or business opportunities, loss of use, business
interruption, loss of data, or any other indirect, special, incidental, or
consequential damages under any theory of liability, whether based in contract,
tort, negligence, product liability, or otherwise. Because some jurisdictions do not
allow the exclusion or limitation of liability for consequential or incidental
damages the preceding limitation may not apply to you. In any event the total
liability of UTCFS shall not exceed the purchase price of the product. The
foregoing limitation will apply to the maximum extent permitted by applicable law,
regardless of whether UTCFS has been advised of the possibility of such
damages and regardless of whether any remedy fails of its essential purpose.
Installation in accordance with this manual, applicable codes, and the instructions
of the authority having jurisdiction is mandatory.
iv AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
While every precaution has been taken during the preparation of this manual to
ensure the accuracy of its contents, UTCFS assumes no responsibility for errors
or omissions.
Advisory messages
Advisory messages alert you to conditions or practices that can cause unwanted
results. The advisory messages used in this document are shown and described
below.
WARNING: Warning messages advise you of hazards that could result in injury
or loss of life. They tell you which actions to take or to avoid in order to prevent
the injury or loss of life.
Caution: Caution messages advise you of possible equipment damage. They tell
you which actions to take or to avoid in order to prevent the damage.
Note: Note messages advise you of the possible loss of time or effort. They
describe how to avoid the loss. Notes are also used to point out important
information that you should read.
Product Symbols
This symbol appears on the main board of the unit and indicates that the
board contains static sensitive components.
This label is located on the laser chamber at the bottom right of the open
detector and signifies that the unit is a Class 1 Laser product as specified
in IEC 60825-1. The unit incorporates a Class 3B embedded laser which
must not be removed from the detector, as retinal damage may result if
the laser beam enters the eye.
This symbol indicates the Safety ground studs. These are for grounding
cable screens, etc., and should not be connected to 0V or signal earth.
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook v
EN 54-20 and UL installation
The installation must be designed using PipeCAD software. After designing the
installation including pipes, endcaps, and sampling holes, enter the detector type.
To select the detector type, click Options > Calculation options, and then select
the detector from the Type drop-down list.
EN 54-20 installation
Select Options > Calculate, or click on the calculator icon. The software will
prompt you to choose from Use set hole sizes, Best flow balance, and Max.
permissible transit time. Select the appropriate option and click OK. The results
for each pipe (View > Results) show calculations for each sampling hole on the
pipe with the nearest to the detector at the top of the screen, and the endcap
hole at the bottom.
For EN 54-20 compliance the transport time of the last sampling hole shall be
checked following all installation and proven to be less than or equal to that
determined by PipeCAD.
For the installation to comply with EN 54-20 Classes A, B, and C each sampling
hole must be no less sensitive than 0.31% obs/m.
The calculation can be further refined by leaving a working detector in the
protected area for at least 24 hours at the intended alarm factor for the
installation (this could be done before or after installation). The detector
sensitivity can be read from the Sensitivity figure on the histogram screen of the
Remote Control software supplied with each detector. Click Options > Calculation
options to open the Hole calculation options dialog box. Enter the sensitivity
value obtained from the practical test, and then click OK. The new calculated
value will use the real sensitivity from the practical test.
The PipeCAD software will determine the classification of any used configuration.
Commissioning and periodic system tests must involve smoke tests to verify that
the system performs as expected and enters Fire 1 alarm within the time
determined by PipeCAD from the farthest hole. The detector sensitivity must also
be inspected to ensure it has not radically fallen from the installed figure. If it has
changed for any reason, the new figure must be re-entered into PipeCAD and the
recalculated hole sensitivities must be confirmed to be within the class limits
shown above. The settings of a compliant system should be recorded, as it is
possible by changing certain programmable functions to make the system
noncompliant. If functions are changed, it is recommended that the system is
retested if continuing compliance is in any doubt.
UL installation
Note: UL certified products may also contain additional approvals, e.g. FM3230.
Please refer to the product labels.
vi AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
UL 268 fire tests were passed with an installation as follows:
Total sampling pipe length: 160 ft. (single pipe)
Number of sampling holes: 10
Worst-case sampling hole sensitivity as indicated by PipeCAD:
1.28% obs/ft.*
Alarm factor: 1
Fire 1 alarm delay: 0 seconds
These settings gave satisfactory responses to the test fires in 120 seconds or
better. For the purposes of UL 268 compliance, these should be regarded as
worst case values. Layouts should be planned in PipeCAD and the indicated
worst-case hole sensitivity should be better than 1.28% obs/ft.*. Commissioning
smoke tests should be performed to ensure that the farthest sampling hole from
the detector is capable of generating a fire alarm within 120 seconds of receiving
smoke.
* The results should be verified at installation by entering the installed detector's
Fire 1 sensitivity (as indicated in the remote software histogram screen) into the
PipeCAD “Options/Calculation options/Detector sensitivity” field and recalculating
the layout results.
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 1
Chapter 1
Product and component
descriptions
Summary
This chapter provides descriptions of the detector features, specifications, and
controls and indicators.
Content
Introduction 2
Available software for the detector 2
Specifications 3
Indicators 4
Inside the detector 5
Removable terminal block connections 6
Product and component descriptions
2 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Introduction
This aspirating detector is a highly sophisticated next generation high sensitivity
aspirating smoke detection product that provides all the benefits of air sampling
high sensitivity smoke detection, including very early warning. Designed for easy
installation and commissioning, the detector incorporates a patented artificial
intelligence known as ClassiFire, which allows the detector to configure itself to
optimum sensitivity, alarm thresholds, and minimum nuisance alarms for various
environments.
This detector operates by drawing air from a protected space via a supervised
piping network in relatively small areas. The sampled air is passed through a
dust separator (filter) to remove dust and dirt before entering the laser detection
chamber. State-of-the-art electronics are used to analyse the sampled air and
generate a signal representing the level of smoke present.
ClassiFire intelligence also monitors the detector chamber, continually adjusting
the appropriate operating parameters to counteract the negative effects of any
contamination. Aspirating smoke detectors are unique in being able to provide a
consistent level of protection in a very wide range of environments by
continuously making minor adjustments to sensitivity.
Available software for the detector
The Remote Control software package is available to program the detector.
• Remote Control software: Provided free of charge with every detector, this
software package enables the user to set up and configure the programmable
functions of one or more detectors from a computer connected via an RS-232
serial cable.
Product and component descriptions
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 3
Specifications
Caution: This equipment is only to be used in accordance with these
specifications. Failure to operate the equipment as specified may cause damage
to the unit, injury, or property damage.
Table 1: Specifications
Specification Value
SELV rating EN 60950 Class III
Supply voltage 21.60 to 26.40 VDC
PSU Type: conforming to EN 54-4
Electrical safety complies with BS EN 610190-1
Size 145 W × 220 H × 90 D mm
(5.7 W × 8.6 H × 3.5 D in.)
Weight 1.7 kg (3.75 lbs.) with docking station
Operating temperature range −10 to +60ºC (EN 54-20)
32 to 100°F (0 to 38°C) (UL 268, CAN/ULC-S529,
FM3230)
Operating humidity range 0 to 90% Noncondensing
BS EN 61010-1 Pollution degree 1
BS EN 61010-1 Installation category II
Sensitivity range
(%obs/ft.)
(%obs/m)
Min. = 7.62%, Max. = 0.00914% FSD
Min. = 25%, Max. = 0.03% FSD
Maximum sensitivity resolution 0.0015% obs/m (0.00046% obs/ft.)
Detection principle Laser light scattering mass detection
Particle sensitivity range 0.0003 µm to 10 µm
Current consumption 250 mA
Relay contact rating 500 mA at 30 VDC
Optional relay input card contact rating 1 A at 24 VDC
Maximum sampling pipe length 50 m (165 ft.) total
Sampling pipe inlets 1
Sampling pipe internal diameter 3/4 in. (ID) or 27 mm (OD)
Alarm levels 4 (Fire 2, Fire 1, Pre-Alarm and Aux)
1 relay as standard, others available
Chamber service intervals Greater than 8 years (depending on environment)
Dust separator (filter) replacement
intervals
Greater than 5 years (depending on environment)
Laser lifetime (MTTF) Greater than 50 years
Programming PC via RS-232
IP rating IP50
Product and component descriptions
4 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Indicators
Figure 1 shows the three indicators on the detector.
Figure 1: Detector indicators
(1) Fire: Illuminates when the alarm level has been reached and the appropriate time delays
have expired.
(2) Fault: Illuminates when the unit has a fault and fault signal is being sent to the fire alarm
panel. It also illuminates when the unit is isolated.
(3) OK: Illuminates to show normal operation when there are no faults. The OK lamp will flash
during the 15-minute FastLearn period when the detector is first learning about its
environment.
Fire
Fault
OK
(1)
(2)
(3)
Product and component descriptions
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 5
Inside the detector
Figure 2 shows the main interior parts of a detector with the cover off.
Figure 2: Detector interior view (EN/UL certified models)
(1) Removable terminal block connections
(2) Filter (dust separator)
(3) RS-232 serial port
(4) Detector address DIP switch
(5) Addressable Programmable Interface Card (APIC) or Relay Card port
(6) Internal cover (UL certified models only)
Product and component descriptions
6 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Removable terminal block connections
Figure 3 shows the terminal block connections that connect the detector to other
electronic components.
Figure 3: Detector terminal block connections
(1) Fault relay contacts (Open = FAULT)
(2) Fire relay contacts (Closed = FIRE)
(3) APIC addressable bus connections for use in conjunction with interface card
(4) Connections are not applicable for Micra 10
(5) Power supply connections
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 7
Chapter 2
Installation and
configuration
Summary
This chapter provides information necessary to install and configure the detector
system.
Content
Introduction 8
Antistatic precautions 8
General installation guidelines 10
Docking station 10
Application 12
System design 12
Below or above the ceiling installations 14
Installation 17
Mechanical installation 17
Removing the front cover 17
Electrical installation 17
Relay connections 20
Interfacing with fire alarm panels 21
Connecting a detector to an APIC 22
Setting the detector address 23
Address table
23
Final installation 25
Removing the detector 26
Configuring the detector after installation 26
List of programmable functions 27
Connecting to a PC 28
Event log 30
Installation and configuration
8 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Introduction
This topic provides information necessary to install the detector system.
To install the detector:
1. Unpack the shipping carton. Ensure that the package contains a CD-ROM,
two ferrite rings, two cable glands, and the unit.
2. Determine the optimum location for the detector.
3. Mount the APIC or Relay Card inside the detector, if required.
4. Mount the docking station.
5. Connect the docking station to the sampling pipe network.
6. Mount the detector to the docking station.
Installation should only be done by trained technicians.
Note: Each relay card is supplied with a RF suppression ferrite ring. To ensure
compliance with all relevant EMC requirements, conductors connected to the
fault output (included screen wire) should be wound once around a ferrite.
Installation should be in accordance with applicable installation requirements.
These include:
• NFPA-70, National Electrical Code
• NFPA-72, National Fire Alarm and Signaling Code
• CSA C22.1 Canadian Electrical Code, Part 1
• CAN/ULC-S524 Installation of Fire Alarm Systems
• Any other local, national, or installation requirements or standards.
WARNING: Electrocution hazard. All connections should be made with the
power turned off.
Antistatic precautions
This system contains static-sensitive components. Always ground yourself with a
proper wrist strap before handling any circuits. This recommendation must be
followed when removing the equipment case, and during installing and servicing.
Caution: When handling any electric components or printed circuit boards,
antistatic precautions must be followed. Failure to do so may result in component
damage.
Electro-static discharge can be reduced by adhering to the following guidelines:
• Always use conductive or antistatic containers for transportation and storage,
if returning any item.
• Wear a wrist strap while handling devices and ensure that a good ground is
maintained throughout the installation process.
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 9
• Never subject a static sensitive device to sliding movement over an
ungrounded surface and avoid any direct contact with the pins or
connections.
• Avoid placing sensitive devices onto plastic or vinyl surfaces.
• Minimise the handling of sensitive devices and printed circuit boards (PCBs).
Installation and configuration
10 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
General installation guidelines
The following is a brief set of guidelines on installing detectors:
• The detector should normally be mounted at a level where there is easy
access to the RS-232 serial port for configuration and programming.
• The exhaust air from the unit must not be impeded in any way. If the unit is
mounted where the air pressure differs from the sampling location (for
example an air duct), then a pipe must be routed from the exhaust port back
to the same air pressure zone as the sampling holes.
• Sampling holes should be free from burrs and swarf.
• All signal cables must be suitable for the application. The specific type of
cable will normally depend upon the local fire regulations.
• The unit must not be placed in areas where either the temperature or humidity
is outside the specified operating range.
• The unit should not be placed in close proximity to any equipment expected to
generate high levels of radio frequency signals (such as radio alarms) or units
generating high levels of electrical energy (such as large electric motors or
generators).
Docking station
The basic principle behind the easy installation of the detector is that all wiring
and pipework is installed using a docking station. This is a convenient feature
that allows the detector to be dismounted or replaced without disturbing any
wiring or installed pipework.
The docking station inlet (sampling) port and exhaust port is used to interface
with the pipe network. The inlet port is used for aspirating the pipework network.
The exhaust port allows the detector exhaust air to be routed back to the
sampling area, when differing atmospheric pressures require this. (Refer to
Figure 4.)
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 11
Figure 4: Docking station
(1) Cable gland
(2) Earth stud
(3) Exhaust port
(4) Sampling port
(5) Mounting screw holes
Installation and configuration
12 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Application
This detector is a smoke detector intended to provide localised incipient fire
detection. It is suitable for use in a wide range of applications, such as small noncompartmentalised rooms, warehouse racking, or pieces of electronic or
electromechanical equipment where it is desirable to achieve individual incipient
fire reporting. In compartmentalised rooms, each compartment would normally
use individual aspirating detectors.
The detector employs a low-power aspirator (fan) designed to detect incipient
fires in relatively small areas. The detector is not intended to protect large areas,
or to sample from areas where there may be any difference in airflow rates or
pressure differentials. If detection in environments conforming to these
descriptions is required, other type detectors should be used.
System design
Simple designs with short sampling pipes produce the best results. Complex
sampling pipe runs should be avoided with the detector. The use of
T-branch pipes is not recommended. Maximum recommended sampling pipe
length is 50 m (165 ft.) in still air. If the protected area has airflow present, the
maximum permitted sampling pipe length will be reduced.
Note: PipeCAD pipe modeling software must be used when designing a pipe
network and verifying its performance. Refer to the PipeCAD System Design and
Installation User Guide for complete instructions on how to design and install an
air sampling pipe network.
In order for the installation to conform to EN 54-20, pipes must conform at least
to EN61386-1 Class 1131.
Sampling pipes must have capped ends. The end cap should be drilled with a
hole normally between 4 or 5 mm diameter and free from burrs. Sampling holes
should normally be 3 to 4 mm diameter or as calculated by PipeCAD, and free
from burrs. Each pipe run should not have more than 10 holes (including the end
cap hole). Pipe transit time from the furthest sampling hole from the detector
must not exceed 120 seconds and an approved type of pipe must be used. It is
strongly recommended that the smoke transit time from the furthest sampling
hole be checked during commissioning tests.
Capillary remote sampling points may be used in place of sampling holes.
Always locate the sampling points in positions to which smoke may reasonably
be expected to travel. It is usually better to locate the sampling pipe directly in the
airflow (for example, across the return air register of an air conditioning unit).
Note: There is no substitute for carrying out smoke tests prior to installation of
pipework to indicate suitable sampling point location.
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 13
No more than one air handling unit may be protected with one detector. In this
application, ensure that the sampling pipe is raised clear of high velocity air in the
immediate vicinity of the air intake grill on standoff posts as shown in Figure 5.
Figure 5: Air handling unit in vicinity of the detector (exhaust shown for clarity)
(1) Incorrect location
(2) Detector
(3) Sampling pipe
(4) Standoff posts
(5) Correct location
(6) Detector
(7) AHU
(8) Equipment cabinet
(9) Direction of smoke
Installation and configuration
14 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Below or above the ceiling installations
The detector is supplied with a docking station (as shown in Figure 4 on page
11). This allows the detector to sample from areas which may be at different air
pressure from the detector location. Typical uses are for air duct sampling and
allowing the installation of the detector in under-floor or ceiling voids or when
sampling from pieces of computer related equipment. See Figure 6 and Figure 7.
Figure 6: Installation of pipework above ceiling with exposed detector (piped exhaust)
(1) Sampling pipe
(2) Sampling hole
(3) Detector
(4) Exhaust pipe
(5) False ceiling
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 15
Figure 7: Installation with detector mounted in ceiling void (no exhaust piping)
(1) Sampling pipe
(2) Sampling hole
(3) Detector
(4) False ceiling
Installation and configuration
16 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Table 2 below contains a list of procedural guidelines for installation of the
detector.
Table 2: Procedural guidelines
Do Don’t
Ensure that the power and signal cables are
correctly connected before powering up by use
of cable identifiers or electrical continuity
checks. Incorrect connection could damage the
detector.
Ensure that cable of an appropriate approved
type is used for interconnection.
Place sampling points so that the detector will
be able to detect smoke at the earliest
opportunity.
Ensure that the detector exhaust is in an area
with the same atmospheric pressure as the
sample pipes, either by placing the detector
physically in the protected area or by leading a
pipe from the detector exhaust to the protected
area.
Ensure that the environment of the protected
area is within the environmental operating
parameters of the detector.
Set the appropriate ClassiFire alarm factor for
the area to be detected.
Set the detector address switches correctly
when used in a network.
Ensure that the detector is properly grounded.
Drop the detector.
Install detectors in damp or exposed areas.
Remove or connect boards when the detector is
powered up.
Connect internal 0 volt terminals to local earth.
Attempt to re-use dust separator (filter)
cartridges once removed.
Attempt to adjust or alter detector settings other
than via the user-programmable functions. Any
attempts to adjust the laser potentiometer are
detectable and will void the warranty on the
product.
Place the detector near high power RF sources.
Place the detector so close to other equipment
that there is insufficient room to access and
change the dust separator (filter) or access the
RS-232 connector.
Use sampling pipe of less than 27 mm (1 in.)
outside diameter without a suitable 27 mm
(1 in.)
pipe adapter. It is important that there are
no leaks where the pipe connects to the
detector.
Use excessive force when fitting sampling pipes
as this may damage the detector.
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 17
Installation
Mechanical installation
The docking station is connected to the installed sampling pipework and fixed to
the mounting surface using three screws of a type appropriate to the mounting
surface. Ensure that the sampling and exhaust pipes are securely seated in the
pipe ports before securing. If using a piped exhaust docking station, be sure that
the sampling and exhaust pipes are fitted into the relevant ports as shown in
Figure 4 on page 11.
Removing the front cover
To remove the front cover, unfasten the four attachment screws on the front of
the unit. The cover may then be removed.
Electrical installation
The detector is supplied with removable terminal blocks (Refer to Figure 3 on
page 6.) These may be removed from their sockets by lifting them up at right
angles to the circuit board.
Take note of the orientation of each terminal block and its function before
removing it. It may also be beneficial to mark the connection wires with suitable
identification labels or colored rings to aid in the connection process.
Each detector is supplied with a pair of RF suppression ferrite rings. To ensure
compliance with all relevant EMC requirements, the conductors of each cable
should be wound once around a ferrite as shown here before entering the
relevant connector. Power conductors should be on a separate ferrite, but
different forms of signal conductor (e.g. APIC signals and relays) can share the
same ferrite. There should be about 30 mm (1-1/4 in.) of wire between the end of
the ferrite and the terminal block to give adequate stress relief. To achieve this, it
is necessary to strip back the cable screen approximately 130 mm (5 in.). The
screen should be terminated under the cable gland cap (as shown in Figure 8).
Installation and configuration
18 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Figure 8:
Looping relay connection wires around a suppression ferrite
WARNING: Electrocution hazard. All connections should be made with the
power turned off.
Power supply connections
The power supply cable should be the shielded (screened) type and should be
routed through the metal cable gland provided, leaving about 35 mm (1-1/4 in.) of
the cable extending from the bottom of the cable gland. Depending on the type of
cable used, it may be necessary to increase the diameter of the cable with
sleeving or insulating tape to ensure that the cable is firmly held when the cable
gland is fully tightened.
Note: It is important that you are aware of the orientation of the terminal block
before removing it.
To connect the power supply:
1. Remove the detector front cover and detach the power supply terminal block,
located at the top left inside the detector. (Refer to Figure 2 on page 5 for a
photograph of the detector with the front cover removed. Refer to Figure 9 for
a detailed photograph of the power supply terminals.)
2. Connect 0 V and +24 VDC to the 0V and 24V screw terminals respectively.
3. Connect the shielded (screened) wire to the ground stud on the docking
station.
4. Connect a second wire from the Earth terminal to the docking station ground
stud. Figure 4 on page 11 shows the location of the ground stud.
5. Connect the ground wires to the ground stud.
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 19
Figure 9: Detector power supply terminals
Signal connections
To connect the signal wire:
1. Lead a suitable wire type (RS-485 cable 9841, 120 ohm shielded (screened)
twisted pair or equivalent) through the second cable gland.
2. Tighten it into position with approximately 35 mm (1-1/4 in.) of cable from the
bottom of the cable gland.
3. Remove the four-way Bus terminal block (if connecting the detector to an
alarm panel in conjunction with the APIC addressable bus card). Refer to
Figure 10 for an illustration of the terminals and “Setting the detector address”
on page 22 for details on addressing.
Figure 10: APIC address
(1) APIC Address terminal
(2) Terminals not applicable for Micra 10
Figure 11 shows the power and signal connections to the docking station for
connection to a single network cable.
Installation and configuration
20 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Figure 11: Power and signal connections to the docking station
(1) Power supply 0V wire
(2) Power supply shielded wire
(3) Power supply +24V wire
(4) Wire from earth terminal to ground stud
(5) Relay Fault terminals
(6) Relay Fault shielded wire to ground stud
Relay connections
The detector includes a Fire relay (corresponding to the Fire 1 alarm level), which
closes on alarm, and a general Fault relay, which opens on any fault condition or
on power-down (see Figure 12). The relays are of the volt-free type, with a
maximum current capacity of 500 mA at 30 VDC maximum. Connect the screen
of the relay cables to the ground stud of the detector.
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 21
Figure 12: Fault and Fire relay contacts
(1) Fault relay contacts
(2) Fire relay contacts
Interfacing with fire alarm panels
Because of the flexible nature of the detector and the many possible
configurations, there are many options for interfacing the detectors to a fire
panel. The detector provides the following methods of interfacing with fire alarm
panels:
• To conventional fire alarm panels using the detector’s Fire and Fault relay
contacts
• To addressable fire alarm panels, or standard loop interface modules via
Addressable Programmable Interface Cards (APICs)
APICs, which can be mounted inside the detector, may simplify installation when
connecting to addressable signaling line circuits (SLC). The APIC used is
completely dependent on the SLC protocol, and therefore the make and model of
the fire alarm panel.
WARNING: Incompatible APIC panel combinations may result in a non-
operational system which may fail to perform during an event, with resultant loss
of life and/or property.
The interface is set to a single address mode, the card appears as a single
address on the SLC, and the detector status is read from that address.
(1) (2)
Installation and configuration
22 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Connecting a detector to an APIC
The APIC is fitted to the four mounting studs on the detector PCB using the
supplied screws as shown Figure 13 below.
The connections to the fire panel are made using the BUS L1 and H1 (bus 1
input and output) and the BUS L2 and H2 (bus 1 input and output) terminal
connectors shown in Figure 10 on page 19.
The settings that need to be made are on the APIC address DIP switches. Both
switches (SW1, SW2) must be set to the same address.
Note: Some protocols may not support all the available alarm levels and fault
reporting is usually a general fault with no detailed fault information. Please
consult the specific APIC protocol documentation for more information.
Figure 13:
APIC connections (EN/UL certified models)
(1) Mounting studs/screws (4X)
(2) APIC Interface connection
(3) APIC address switch (2X)
(4) Internal cover (UL certified models only)
(1)
(2)
(3)
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 23
Setting the detector address
In order to identify itself to the PC command module or fire panel, each detector
needs to have a unique address ranging from 1 to 127. The detector address is
set on DIP switch SW1, at the bottom left of the opened detector on the main
circuit board. The switch settings are up for 1 and down for 0, and the detector
address is set as a 7-bit binary code (switch 8 equates to a value of 128 and so
is outside the usable address range). Refer to Figure 2 on page 5 for the location
of the detector DIP switches.
Figure 14 shows a sample DIP switch setting.
The address equates to 11000110 in binary, or:
(1 x 1) + (1 x 2) + (0 x 4) + (0 x 8) + (0x 16) + (1 x 32) + (1 x 64) + (0 x 128) = 99
The full range of available addresses and their relevant switch settings are
provided in Table 3 on page 24 for reference.
Figure 14: Sample DIP switch settings
Address table
Addresses chosen for detectors do not have to be consecutive or in a given
order as long as they are all different.
Table 3
on page 24 provides the
address table for detectors.
Installation and configuration
24 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Table 3: Address table
Address
1 2 3 4 5 6 7 8
65 1 0 0 0 0 0 1 0
1
1 0 0 0 0 0 0 0
66
0 1 0 0 0 0 1 0
2
0 1 0 0 0 0 0 0
67
1 1 0 0 0 0 1 0
3
1 1 0 0 0 0 0 0
68
0 0 1 0 0 0 1 0
4
0 0 1 0 0 0 0 0
69
1 0 1 0 0 0 1 0
5
1 0 1 0 0 0 0 0
70
0 1 1 0 0 0 1 0
6
0 1 1 0 0 0 0 0
71
1 1 1 0 0 0 1 0
7
1 1 1 0 0 0 0 0
72
0 0 0 1 0 0 1 0
8
0 0 0 1 0 0 0 0
73
1 0 0 1 0 0 1 0
9
1 0 0 1 0 0 0 0
74
0 1 0 1 0 0 1 0
10
0 1 0 1 0 0 0 0
75
1 1 0 1 0 0 1 0
11
1 1 0 1 0 0 0 0
76
0 0 1 1 0 0 1 0
12
0 0 1 1 0 0 0 0
77
1 0 1 1 0 0 1 0
13
1 0 1 1 0 0 0 0
78
0 1 1 1 0 0 1 0
14
0 1 1 1 0 0 0 0
79
1 1 1 1 0 0 1 0
15
1 1 1 1 0 0 0 0
80
0 0 0 0 1 0 1 0
16
0 0 0 0 1 0 0 0
81
1 0 0 0 1 0 1 0
17
1 0 0 0 1 0 0 0
82
0 1 0 0 1 0 1 0
18
0 1 0 0 1 0 0 0
83
1 1 0 0 1 0 1 0
19
1 1 0 0 1 0 0 0
84
0 0 1 0 1 0 1 0
20
0 0 1 0 1 0 0 0
85
1 0 1 0 1 0 1 0
21
1 0 1 0 1 0 0 0
86
0 1 1 0 1 0 1 0
22
0 1 1 0 1 0 0 0
87
1 1 1 0 1 0 1 0
23
1 1 1 0 1 0 0 0
88
0 0 0 1 1 0 1 0
24
0 0 0 1 1 0 0 0
89
1 0 0 1 1 0 1 0
25
1 0 0 1 1 0 0 0
90
0 1 0 1 1 0 1 0
26
0 1 0 1 1 0 0 0
91
1 1 0 1 1 0 1 0
27
1 1 0 1 1 0 0 0
92
0 0 1 1 1 0 1 0
28
0 0 1 1 1 0 0 0
93
1 0 1 1 1 0 1 0
29
1 0 1 1 1 0 0 0
94
0 1 1 1 1 0 1 0
30
0 1 1 1 1 0 0 0
95
1 1 1 1 1 0 1 0
31
1 1 1 1 1 0 0 0
96
0 0 0 0 0 1 1 0
32
0 0 0 0 0 1 0 0
97
1 0 0 0 0 1 1 0
33
1 0 0 0 0 1 0 0
98
0 1 0 0 0 1 1 0
34
0 1 0 0 0 1 0 0
99
1 1 0 0 0 1 1 0
35
1 1 0 0 0 1 0 0
100
0 0 1 0 0 1 1 0
36
0 0 1 0 0 1 0 0
101
1 0 1 0 0 1 1 0
37
1 0 1 0 0 1 0 0
102
0 1 1 0 0 1 1 0
38
0 1 1 0 0 1 0 0
103
1 1 1 0 0 1 1 0
39
1 1 1 0 0 1 0 0
104
0 0 0 1 0 1 1 0
40
0 0 0 1 0 1 0 0
105
1 0 0 1 0 1 1 0
41
1 0 0 1 0 1 0 0
106
0 1 0 1 0 1 1 0
42
0 1 0 1 0 1 0 0
107
1 1 0 1 0 1 1 0
43
1 1 0 1 0 1 0 0
108
0 0 1 1 0 1 1 0
44
0 0 1 1 0 1 0 0
109
1 0 1 1 0 1 1 0
45
1 0 1 1 0 1 0 0
110
0 1 1 1 0 1 1 0
46
0 1 1 1 0 1 0 0
111
1 1 1 1 0 1 1 0
47
1 1 1 1 0 1 0 0
112
0 0 0 0 1 1 1 0
48
0 0 0 0 1 1 0 0
113
1 0 0 0 1 1 1 0
49
1 0 0 0 1 1 0 0
114
0 1 0 0 1 1 1 0
50
0 1 0 0 1 1 0 0
115
1 1 0 0 1 1 1 0
51
1 1 0 0 1 1 0 0
116
0 0 1 0 1 1 1 0
52
0 0 1 0 1 1 0 0
117
1 0 1 0 1 1 1 0
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 25
53
1 0 1 0 1 1 0 0
118
0 1 1 0 1 1 1 0
54
0 1 1 0 1 1 0 0
119
1 1 1 0 1 1 1 0
55
1 1 1 0 1 1 0 0
120
0 0 0 1 1 1 1 0
56
0 0 0 1 1 1 0 0
121
1 0 0 1 1 1 1 0
57
1 0 0 1 1 1 0 0
122
0 1 0 1 1 1 1 0
58
0 1 0 1 1 1 0 0
123
1 1 0 1 1 1 1 0
59
1 1 0 1 1 1 0 0
124
0 0 1 1 1 1 1 0
60
0 0 1 1 1 1 0 0
125
1 0 1 1 1 1 1 0
61
1 0 1 1 1 1 0 0
126
0 1 1 1 1 1 1 0
62
0 1 1 1 1 1 0 0
127
1 1 1 1 1 1 1 0
63
1 1 1 1 1 1 0 0
64 0 0 0 0 0 0 1 0
Final installation
Once the power and signal connections are made, slide the detector body up into
the docking station and fasten it into position using the M4 pan head screws
provided. Slot the power and signal terminal blocks into the relevant sockets on
the detector PCB (which will only click fully home in the correct orientation).
Lastly, replace the detector cover using the four M3 pan head screws provided.
Refer to Figure 15.
Note: The detector is designed solely for operation with the front cover securely
fitted using all four mounting screws.
Installation and configuration
26 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Figure 15: Final installation
(1) Docking station attachment screws (2X)
(2) Cover mounting screws (4X)
Removing the detector
Removing the detector is the reverse of the installation process, leaving the
pipework and wiring connections installed in the docking station (as shown in
Figure 11 on page 20). See Figure 15 above.
Configuring the detector after installation
The detector programmable functions are accessed using a PC (connected to
the detector) running the Remote Control software program.
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 27
Remote Control software
Provided free of charge with every detector, the Remote Control software
package enables the user to set up and configure the programmable functions of
one or more detectors or command module from a computer connected via an
RS-232 serial cable. Complete instructions on how to install, launch, and use the
Remote Control software is provided in the Remote Control Software User Guide
under separate cover.
List of programmable functions
In the Remote Control program, the tabbed Functions Settings window contains
all of the available programmable functions.
For details about these functions refer to the manual provided separately:
• Remote Control Software User Guide
To change one of the programmable functions, go to the relevant tab, make the
change, and then click OK to save the changes to the detector’s internal
firmware.
The following programmable functions are available:
• Time and Date
• Alarm Levels
• Alarm Delays
• ClassiFire Override (when optional Input/Relay card is installed)
• Alarm Factor
• LDD Enable
• FastLearn Enable
• Auto FastLearn Enable
• ClassiFire 3D
• Demo Mode
• Day Start/Night Start
• Disable Day/Night Switching
• Remote Functions (when optional Input/Relay card is installed)
• Programmed Isolate
• Latching Alarms
• Latching Faults
• Cascading Alarms
• Device Type (reference only)
• Firmware Version
• Run-time Hours
• Watchdog Count (reference only)
• Device Text
• Flow Rate (reference only)
• Flow High Limit
• Flow Low Limit
• Flow Fault Delay
Installation and configuration
28 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
• Access Code
• Chart Recording Rate
• Separator Condition (reference only)
• Separator Change Date
• Factory Default
• Reset
• Real Time ClassiFire Viewer Histograms (reference only)
• Chart Recording
Connecting to a PC
To connect a single stand-alone detector to a PC, connect the PC‘s serial port
directly to the detector’s 9-way RS-232 port. Connections for this cable are
shown in Figure 16. If required, you use a USB to serial RS-232 adapter cable to
connect to the PC USB port.
Figure 16: RS-232 cable connections
(1) 9 pin female D connector
(2) 9 pin female D connector
Figure 17 shows the RS-232 cable connection from the detector to a PC.
Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 29
Figure 17: Detector serial port connection for a PC
(1) Serial port connection (to PC)
(2) Gender changer required (UL certified models only)
Installation and configuration
30 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Event log
The Event Log is a record of detector events such as faults, alarms and function
changes. It is stored inside an operating detector and is updated whenever an
event occurs. The event log is nonvolatile, which means that it is retained when
the detector is turned off. The last 200 detector events may be stored.
An event is defined as:
• A change to any programmed function
• A signal received from an external controller such as the remote software or
APIC
• A detector output level meeting or exceeding the Pre-Alarm, Aux, Fire 1, or
Fire 2 alarm thresholds
• A start of day or night operation
• Demonstration Mode start
• FastLearn start or stop
• Power on or off
Events can either be viewed on a PC screen or downloaded to disk by running
the Remote Control program.
When the detector event log is full (200 events have been logged) and a new
event occurs, the oldest event in the log is deleted (first-in, first-out).
To download the event log, connect a PC to the detector serial port and run the
Remote Control software program. For details, see the Remote Control Software
User Guide.
Commissioning
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 31
Chapter 3
Commissioning
Summary
This chapter provides information to commission the detection system.
Content
Introduction 32
Commissioning checklist 32
Precommissioning preparation 34
Acclimation period 34
Transport time verification 34
ASD System Performance Tests 34
Commissioning
32 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Introduction
This chapter covers the commissioning procedures for the detector.
Commissioning strategy initially depends upon the environment in which the
detector is installed. For instance, the test for a computer room (in a relatively
clean environment) would be very different from, say, a flour mill, with a high
level of airborne particulate content.
A widely accepted standard for computer rooms or EDP areas is British Standard
BS6266, equipment overheating at a stage well before combustion. To perform
the test electrically overload a 1‑metre length of PVC insulated wire of 10/0.1mm
gauge for one minute using an appropriate power supply. The detector has two
minutes from the end of the wire burn to give an alarm indication.
For areas with higher levels of background particulate matter testing
methodology would be similar to that of standard point detectors.
Commissioning should only be done by trained technicians in accordance with
applicable standards.
Commissioning checklist
The following brief checklist allows quick setup of the detector. This procedure
will be adequate for most standard installations.
To commission the detector:
1. Before powering up the detector, visually check all cabling to ensure correct
connection. If wire identification is not immediately clear (e.g., by use of
different colored wires or wire identification sleeves), an electrical check
should be made.
Caution: Ensure that all wiring connections are checked prior to powering up
the detector. Incorrect wiring of the detector will cause permanent damage to
the detector.
2. Connect the detector to a PC and set the detector address on the DIP
switches and APIC board (if applicable). Refer to “Interfacing with fire alarm
panels” on page 21 and “Setting the detector address” on page 22 for more
information.
3. Power up the detector.
4. Ensure that all detectors in the network area are clear of troubles and alarms
(if applicable).
5. Launch the Remote Control software on the computer, enter the access code,
and select the Function Settings window.
6. Verify that the time and date are correct on the Time and Date tab.
7. Set an appropriate alarm factor, as shown in Table 4 on page 33, for the
protected environment on the Alarm Levels and Delays tab. The detector will
Commissioning
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 33
automatically perform a FastLearn for the new alarm factor (which takes
approximately 15 minutes). The OK indicator on the front panel will begin to
flash. If using Day/Night switching, check that Day Start and Night Start
settings reflect site operations.
8. While the detector is still in FastLearn mode, place a checkmark next to the
Demo Mode command at the bottom of the Alarm Levels and Delays screen.
The detector will enter demo mode (where it estimates its final sensitivity)
immediately after the FastLearn cycle has finished.
Note: Checking the Demo Mode box only puts the detector into demo mode
while the detector is performing a FastLearn. It has no effect at any other
time.
9. Verify that the FastLearn has concluded (the OK indicator has stopped
flashing). With the detector in demo mode, perform any necessary smoke
tests, ensuring that the detector reacts appropriately, and let the smoke fully
dissipate.
10. Perform another FastLearn, this time by NOT putting the detector into demo
mode. Do this by placing a checkmark next to the FastLearn Enable
command in the Alarm Levels and Delays screen. The OK indicator on the
front panel will begin to flash.
11. The detector will generate no alarms during the 15 minute FastLearn period
and, after this, the detector will operate at a reduced sensitivity for 24 hours
while ClassiFire learns and acclimates to the protected environment and sets
up appropriate day and night sensitivity settings.
12. If desired, exit the Remote Control software and unplug the connector from
the detector serial port.
Table 4: Suggested settings for ClassiFire alarms
Alarm
factor
Sensitivity Probability of nuisance
alarm
Suggested protected area
0 Extremely High Once per year Semiconductor manufacturing clean room
1 High Once per 5 years Computer room
2 High Once per 10 years Non-smoking office
3 High Once per 50 years Clean factory
4 Medium Once per 1,000 years Warehouse
5 Medium Once per 5,000 years Warehouse with diesel trucks operating
6 Medium Once per 10,000 years Warehouse with diesel trucks operating
7 Low Once per 20,000 years Warehouse with diesel trucks operating
8 Low Once per 100,000 years Warehouse with diesel trucks operating
Commissioning
34 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Precommissioning preparation
Commissioning should be performed after all construction has been completed
and cleaned of any lingering post-construction dirt. If ambient monitoring
conditions are recorded before the installation is cleaned up, they may not
accurately reflect actual normal operating conditions that need to be used as
reference data for follow-up maintenance procedures and tests.
Acclimation period
The detector will operate at a reduced sensitivity for 24 hours. ClassiFire will set
up the appropriate day and night sensitivity settings. All air handling units,
thermostats and other systems that can have an effect on the operating
environment should be turned on to simulate normal operating conditions as
closely as possible. After approximately one week of monitoring time (depending
on chart log recording rate), download the detector event log to a PC from the
RS232 port using a serial cable.
Transport time verification
The maximum transport time verification test is the measure of the amount of
time it takes for the detector to respond to smoke that enters the pipe at the
sampling point furthest from the Detector. The results of this test and the
calculated maximum transport time from PipeCAD must be recorded on the
checksheet. Measured transport time less than the calculated time is acceptable.
To measure the maximum transport time of the system:
1. Determine the furthest sampling point from the detector.
2. Allow test smoke to enter the pipe at the furthest sampling point.
3. Record the amount of time for the detector to respond. This is the actual
maximum transport time.
ASD System Performance Tests
Note: It is recommended to follow local codes of practice for approved tests for
this type of installation.
Caution: Oil-based canisters that are used to test point detectors are not suitable
for testing aspirating systems, as the particulate is heavy and tends to drop out in
the pipe, never actually reaching the detector. Also, the oily residue that is left
behind may affect the functionality of the detector.
Troubleshooting
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 35
Chapter 4
Troubleshooting
Summary
This chapter provides information to troubleshoot the detection system.
Content
Troubleshooting the detector 36
Troubleshooting
36 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Troubleshooting the detector
This chapter provides some possible solutions if a problem should occur with
your detector.
Note: Consult either the Remote Control Software User Guide for more
information about the solutions or corrective actions discussed here.
Table 5: Troubleshooting guide
Problem Solution/Corrective Action
Nuisance alarms
occur too often
Check that the ClassiFire alarm factor setting is appropriate for the normal
working environment of the protected area.
Check that the detector is not in demo mode. This can be ascertained by
viewing the event log and checking that the entry demo mode has a higher
log entry number than the most recent FastLearn start and FastLearn end
entries. Note: Remember that the log entries are in reverse order, with the
most recent entries appearing first. If the log shows that demo mode was
invoked during the last FastLearn period, start a new FastLearn and allow
it to complete its 24-hour cycle.
From the event log, check that 24 hours have elapsed since the last
FastLearn end entry.
Check that day-night switchover times are appropriately set to reflect active
and nonactive periods.
Elevated smoke
levels do not
generate alarms
Check that detector is not isolated or in FastLearn (if Isolated, the Fault
light will be lit; if in FastLearn, the OK light will flash).
Check that the detector sampling points are in the smoke stream.
Check that sampling pipes are firmly and cleanly seated in their ports and
undamaged.
Check that the correct ClassiFire alarm setting has been set.
Check that the detector has either had a 24-hour learning period or that it
has been placed in demo mode.
Low mean output Check that the dust separator (filter) cartridge does not require changing
(refer to “Replacing the dust separator cartridge” on page 42 for details)
and that the air plenum chamber is clean. The chamber may become
clogged when, for example, heavy building activity has occurred near the
sampling pipes. If so, the chamber may require factory service. The
detector is not designed to handle large quantities of coarse debris and
dust.
Detector sensitivity
varies over time
There are many reasons why particle densities may vary, and the
ClassiFire system is designed to automatically compensate for this in order
to reduce the likelihood of nuisance alarms due to normal variations in
background smoke density. Within limits set by the ClassiFire alarm factor,
this is a normal part of the detector‘s operation.
Troubleshooting
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 37
Problem Solution/Corrective Action
Flow fault errors These occur when the airflow rate into the detector exceeds the
preprogrammed parameters. As the detector “learns” the flow setup from
the initial installation, this usually means that there has been some change
in conditions. If the detector input is sampled from one area and the
exhaust is in another area with different pressure (e.g., the detector is in a
roof space and sampling from an enclosed room), this may lead to flow
faults. In this case, it would be necessary to lead a pipe from the exhaust
to the protected area to ensure nominal flow.
Low Flow error
message
Check that the pipe is not blocked.
If the pipe is unused, check that the flow sensor for this pipe has been
disabled.
Check that the low flow fault threshold is not set too high.
In the case of intermittent fault indications, try increasing the flow fault
delay time.
High Flow error
message
Check that the pipe is seated in the inlet and is not broken or cracked.
Check that installed pipework is fitted with endcaps. PipeCAD pipe
modeling software prompts for the use of appropriate endcaps. Open bore
pipes are not recommended.
Check that the high flow fault threshold is not set too low.
In the case of intermittent fault indications, try increasing the flow fault
delay time.
Troubleshooting
38 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Maintenance
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 39
Chapter 5
Maintenance
Summary
This chapter provides scheduled and unscheduled maintenance procedures.
Content
Introduction 40
Scheduled maintenance 40
Maintenance procedures 41
Visual check 41
ASD System Performance Tests 41
Transport time verification test 41
Detector sensitivity test 41
Cleaning the detector 42
Replacing the dust separator cartridge 42
Maintenance
40 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Introduction
This chapter contains maintenance instructions for the detector system. These
procedures should be performed on a scheduled basis. In the event that system
problems are found during routine maintenance, refer to Chapter 4
“Troubleshooting” on page 35 Failure to properly maintain the system may affect
the functioning of the system.
Scheduled maintenance
The scheduled maintenance of the system should be performed at an
established interval. The interval between performance of maintenance
procedures should not exceed any imposed regulations. (See NFPA-72 or other
local requirements.)
Local standards and specification requirements must be adhered to. A typical
maintenance plan is listed in Table 6 below.
Notes
It is prudent to disconnect or isolate the detector from the fire panel during
maintenance to prevent unintentional alarm activations.
The detector should be powered down during internal cleaning (use an air duster
can or dry air gun).
Table 6: Maintenance plan
Step Procedure
1 Check detector, wiring and pipework for damage
2 Check original design is still valid, e.g. changes due to building upgrades
3 Check detector for contamination and clean if necessary
4 Check maintenance logs for issues and rectify as appropriate
5 Check transport times against original records: significant increases or decreases in
transport times may imply damaged pipes or sampling holes that need clearing
6 Isolate detector from fire panel if required
7 Smoke test to check detector operation and Alarm relay connection
8 Simulate a fault to check the Fault relay and connection
9 Complete and file maintenance records
10 Reconnect detector to fire panel if required
Maintenance
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 41
Maintenance procedures
The following paragraphs outline general scheduled maintenance procedures to
be performed on an “as necessary” basis.
Caution: Risk of equipment damage. Always turn the power off before servicing
the detector.
Visual check
The visual check must be performed every six months. This check is to ensure
pipe network integrity.
To perform the visual check, observe the entire piping network and check for
abnormalities in the pipes, including any breaks, blockages, crimps, etc.
ASD System Performance Tests
Note: It is recommended to follow local codes of practice for approved tests for
this type of installation.
Transport time verification test
The maximum transport time of the pipe network must be measured and
compared to the recorded transport time at commissioning. (Refer to “Transport
time verification” on page 34 of this manual for test details.) The transport time
verification test must be done at commissioning and every year thereafter.
Detector sensitivity test
The detector sensitivity test must be performed within one year of installation and
every alternate year thereafter.
Example:
• Year-one check
• Year-three check
• If years one and three are OK, go to five-year interval.
The detector employs a self-monitoring, automatically-adjusting calibration for the
system. The inspection only requires a periodic visual inspection for a detector
fault indication and performing the detector sensitivity test function.
If the self-monitoring feature of the system senses that the operation of the
detector head is outside its normal range, a trouble condition will be generated.
Maintenance
42 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Cleaning the detector
The exterior of the detector should be cleaned as necessary. Clean the detector
with a damp (not wet) cloth. Do not use solvents as these may damage the front
panel label.
Caution: Do not use solvents to clean the detector. Use of solvents may cause
damage to the detector.
Replacing the dust separator cartridge
The only part that may require field replacement during servicing is the dust
separator (filter) cartridge.
After replacing the filter, the detector must be put into FastLearn mode.
As dust contained in the dust separators may expose maintenance personnel to
a “Nuisance Dust” hazard as defined by the Control of Substances Hazardous to
Health (COSHH), it is strongly recommended that suitable masks and protective
clothing be worn when changing filters.
Note: Used dust separator cartridges are not intended for reuse and should be
discarded.
To replace the cartridge:
1. Remove the four attachment screws which fasten the unit’s front cover.
2. With the front cover removed, grasp the filter firmly and pull the filter out
(directly towards you).
3. Properly dispose of the used cartridge.
4. Insert the replacement filter cartridge such that the orientation of the Direction
of flow arrow printed on the cartridge corresponds to the arrow on the
“Direction of flow” label beside the filter slot.
5. Slide the cartridge all the way into place.
6. Replace the detector cover and screws and initiate a FastLearn routine.
Maintenance
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 43
Figure 18: Location of dust separator cartridge
(1) Dust separator (filter) cartridge
Maintenance
44 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 45
Glossary
°C Degrees centigrade
°F Degrees Fahrenheit
A Ampere
AC Alternating current
ADA Americans with Disabilities Act
AH Ampere hour
AHJ Authority having jurisdiction
ARC Automatic release circuit
ASD Aspirating Smoke Detector
AWG American wire gauge
APIC Addressable protocol interface card
CSFM California State Fire Marshal
DACT Digital alarm comm. transmitter
DC Direct current
DET Detector
EOLD End of line device
EOLR End of line resistor
FSD Full scale deflection
Full scale deflection
FM Factory Mutual
ft. Feet
HSSD High sensitivity smoke detector
Hz Hertz (frequency)
in. Inches
LCD Liquid crystal display
LED Light emitting diode
MEA Materials and Equipment Acceptance
Division of the City of New York
NAC Notification appliance circuit
N.C. Normally closed
NEC National Electrical Code
NFPA National Fire Protection Association
Glossary
46 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
N.O. Normally open
NYC New York City
PCB Printed circuit board
pF Pico farads
P/N Part number
PSU Power supply unit
RAM Random access memory
SLC Signaling line circuit
TB Terminal block
UL/ULI Underwriters Laboratories, Inc.
V Volts
VAC Volts AC
VDC Volts DC
VRMS Volts root mean square
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 47
Index
A
Acclimation period, 34
Addressing
Address table, 23
Setting the detector address, 23
Advisory messages, iv
Application, 12
ASD System Performance Tests, 34
C
Commissioning, 32
Configuring the detector, 26
Connecting to a PC, 28
D
Detector components, 5
Docking station, 10
E
Event log, 30
F
Fire Alarm Panels
Interfacing, 21
I
Indicators, 4
Installation, 10
Electrical, 17
Mechanical, 17
M
Maintenance, 41
Cleaning the detector, 42
Replacing the dust separator (filter), 42
P
Power supply connections, 18
Programmable functions, 27
R
Relays, 20
Removing the detector, 26
S
signal connections, 19
Software
Available software, 2
Specifications, 3
System design, 12
T
Terminal blocks, 6
Transport time verification, 34
Troubleshooting, 36
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