Nittan Sensortec ST-H2-AS User manual

Document No: NISM/ST-H2-AS/01
Date: JUNE 2016
Sensortec
ST-H2-AS–ANALOGUEADDRESSABLE
HEAT SENSOR
INSTRUCTION MANUAL
Quality System Certificate No. 041
Assessed to BS EN ISO 9001:2008
Hipley Street, Old Woking, Surrey, England, GU22 9LQ. UK
Tel: [phone] Fax: [phone] Web Site: www.nittan.co.uk E-mail: [e-mail]

Sensortec
ST-H2-AS ANALOGUE
ADDRESSABLE HEAT SENSOR
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INSTRUCTION MANUAL
Sensortec.....
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The ST-H2-AS advanced analogue addressable heat sensor forms part of
the Range of analogue addressable fire sensors from Nittan Europe Ltd called
Sensortec .
The ST-H2-AS together with the ST-PY-AS are elegantly designed, low
profile fire sensors which are aesthetically pleasing, thus enabling them to
blend unobtrusively into modern working environments.
The Sensortec analogue addressable range all feature the very latest
technological advancements such as micro-processor design, increasing
reliability and performance.
- BRINGING STYLE INTO FIRE DETECTION SYSTEMS
Changes
are
subject
to DCRN.
Manual:
ST
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H
2
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AS
Manual

Sensortec
ST-H2-AS ANALOGUE
ADDRESSABLE HEAT SENSOR
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CONTENTS:-
Section 1 - Introduction - Page 2
Section 2 - Sensor Models - Page 2
Section 3 - Base Models - Page 2
Section 4 - Installation - Page 3
Section 5 - Maintenance &
Cleaning - Page 3
Section 6 - Specifications - Page 4
Section 7 - Environmental
Parameters:- - Page 4
- Temperature - Page 4
- Humidity - Page 4
Section 8 - EMC - Page 4
Section 9 - Address Setting - Page 5
Section 10 - Connections - Page 6
Section 11 - Dimensions - Page 6
Section 1 - INTRODUCTION
The ST-H2-AS is an attractively-styled, low profile heat
sensor for use with Nittan ' Sensortec ' protocol control
panels.
ST-H2-AS features:
* Low profile, stylish appearance
* Soft addressing
* Low monitoring current
* Supplied with protective dust cover
* Patented OMNIVIEW
TM
360
o
LED fire alarm indicator
* Remote indicator output
* Compatible with UB-4,UB-6-EV and STB-4SE-EV
bases
*Non-polarisedterminals
* Room temperature information can be separately
taken
Section 2 - SENSOR MODELS
The ST-H2-AS heat sensor has two terminals for
connection onto the two wire loop. Terminal 3 (RIL)
provides a switched current sink function which operates
when the detector goes into alarm condition, suitable for
the operation of function such as a remote indicator.
Terminal 3 (RIL) output current is limited to 3mA.
Section 3 - BASE MODELS
A variety of bases are available for use with the ST-
H2-AS detectors. It is important to use the correct
base for each application. The available base models
are:
i) UB-4 base: For standard use with ST-H2-AS series
heat detector.
ii) UB-6-EV base: For standard use with ST-H2-AS
series heat detector.
iii) STB-4SE-EV base: Similar to UB-6-EV base, except
deeper.

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ST-H2-AS ANALOGUE
ADDRESSABLE HEAT SENSOR
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Section 4 - INSTALLATION
In normal use, the ST-H2-AS heat sensor will be installed
at ceiling level. Pass the field wiring through the cable hole
in the centre and from the rear of the base. Offer up and
affix the base to the ceiling or conduit fitting with screws
via the base mounting holes. Connect the field wiring to
the base terminals, as detailed in Section 11 making sure
the wiring does not obstruct fitting of the sensor head.
Fit the heat sensor head by inserting it into the base and
turning clockwise until the notch in the sensor's rim aligns
with base locking screw. The OMNIVIEW
TM
360
o
LED
alarm indicator permits visibilty from any angle.
Note: The address must be set before the sensor is
fitted into place.
Fit the plastic dust cover supplied over the sensor to keep
out dust etc, until the system is commissioned. If the dust
cover is not fitted and the environment is dusty, such as
when building work is being completed, the device maybe
be damaged by internal contamination. At commissioning,
the dust cover should be removed and discarded.
NOTE: THE PLASTIC DUST COVER MUST BE RE-
MOVED FROM THE SENSOR IN ORDER FOR THE
SENSORTO FUNCTIONCORRECTLY.
Section 5 - MAINTENANCE AND
CLEANING
Maintenance:
The ST-H2-AS sensor is a high quality product engineered
for reliability. In order to obtain optimum performance.
periodic maintenance is required. If proper preventative
maintenance is not carried out, there is a likelihood of
malfunction, including false alarms.
Servicing:
Servicing of the system should be carried out in accord-
ance with the requirements of BS 5839 Part 1, Fire
Detection and Alarm Systems for Buildings: Code of
Practice for System Design, Installation and Servicing. The
maintenance procedures described below, should be
conductedwiththe followingfrequency:
One month after installation: Routine Inspection and
every 3 months
thereafter.
Every 6 months: OperationalTest.
Every 12 months: Functional Test and
Cleaning.
All above frequencies of maintenance are dependent on
ambient conditions.
RoutineInspection
i) Ensure the sensor head is secure and undamaged.
ii) Check the heat entry apertures are in no way
obstructed.
iii) Ensure that the surface of the sensor's outer cover is
clean. If there are deposits due to the presence of oil
vapour, dust etc, then the sensor should be cleaned in
accordance with the cleaning instructions detailed later in
this manual. It may be advisable to ensure that such
cleaning is conducted regularly in future.
iv) Ensure that no equipment which may generate exces-
sive heat has been installed in the vicinity of the sensor
since the last routine inspection. If such equipment has
been installed, then you should notify the Fire Safety
Officer or other competent authority that its presence
may cause false alarms.
Operational Test
The purpose of the Operational Test is to confirm the
sensor’s correct operation in response to a heat condi-
tion.
NOTE: When carrying out site testing of Analogue
Addressable Sensortec sensors, the CIE shall be set
to test mode prior to beginning the tests.
i) Take any necessary precautions at the control panel to
limit the sounding of the alarm sounders/bells and any fire
service summoning device.
ii) Test the sensor with heat from a warm air gun de-
signed for heat sensor testing (e.g. 'No Climb - Solo' heat
sensor tester). Check that the sensor gives an alarm
condition within 10-20 seconds depending upon the sensor
grade and the applied air temperature. Check
that the LED indicator on the sensor illuminates.
NOTE: Hot air blowers sold for paint stripping,
soldering pipes etc. generate sufficient heat to
damage the sensor and should not be used for testing
heatsensors.
iii) After the sensor has given the alarm condition, reset
the sensor from the control panel. It may be necessary
to allow a short time to elapse before resetting the
sensor, to allow any residual heat from the test to dis-
perse (The Panel may automatically reset if "Test Mode"
is used).
iv) Before proceeding to the next sensor, ensure that
the sensor just tested does not re-operate due to the
presence of residual heat.

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ADDRESSABLE HEAT SENSOR
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FunctionalTests:
The functional test checks the sensors operation. These
sensors may be returned to our factory for Functional
Testing.
Cleaning:
Note: The sensor head should NOT be disassembled.
i) Carefully remove the heat sensor from its base.
ii) Use a soft, lint-free cloth, moistened with alcohol for
sticky deposits, to clean the plastic cover.
iii) Using a soft bristle brush (e.g. an artist's paintbrush)
carefully brush between the vanes and thermistor in a
linear motion away from the apertures on the plastic case.
iv) Ensure that no debris is left on or around the
thermistor once cleaning is complete.
v) If the unit needs further cleaning or is damaged or
corroded, please return the complete sensor to Nittan
Europe Ltd. for service.
Section 6 - SPECIFICATIONS
ModelReference: - ST-H2-AS
ComputerReference: - F15-81300
Sensitivity: - A2S - 54
o
C to 70
o
C.
SensorType: Thermistor of low
thermal mass
OperatingCurrent: - Quiescent - 500 µ amps
Fire alarm -5.2mA
(LED on)
Standard: - EN54 Part 5:2000
Mass: - 100g(excluding base)
Charging Time: - 20 seconds
AmbientTemperature
Range: - -10
o
C to +55
o
C (A2S)
IPRating: - 42
Section 7 - ENVIRONMENTAL
PARAMETERS
TemperatureConsiderations:
Over the range from -10
o
C to +55
o
C
Humidity:
Relative Humidity of up to 95%, measured at 50
O
C, non
condensing.
Section 8 - EMC
Installation
The installation shall be in accordance with the
regulations either of the approval body for an approved
system, or otherwise, to the national code of practice/
regulations for the installation of the fire alarm system,
e.g. BS 5839 part 1.
Electromagnetic Compatibility (EMC)
On a site where there is an unusually high level of
potential electrical interference, e.g. where heavy currents
are being switched or where high levels of R.F. are
prevalent, care then must be taken in the type and
routing of cables. Particular care should be given to the
separation of zone wiring from the cable carrying the
interference.
Section 9 - ADDRESS SETTING
Use MTM-E Programmer for setting the address of all
devices prior to installation.
Section 10 - END OF LIFE
Like all electronic equipment, at the end of its working
life this unit should not be disposed of in a refuse bin. All
Nittan products since 2005 have been marked with the
WEEE Logo in compliance with European Directive
2002/96/EC and Nittan Europe Limited is a member of a
WEEE Compliance Scheme.
Contact [email protected]o.uk for a copy of our WEEE
Compliance Policy.

Sensortec
ST-H2-AS ANALOGUE
ADDRESSABLE HEAT SENSOR
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DATE:
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Section 11 - CONNECTIONS
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RIL mustbe LED type
RIL
Max. current through
3 = 3mA @ 24V d.c.
UB-4, UB-6-EV,or STB-4SE-EVbase
Auxiliary terminal RIL current limited to 3mA. If the +ve supply for the auxiliary equipment is taken from the
Sensortec loop, care must be taken to not cause corruption of the Sensortec protocol by excessive current draw.
Section 11 - DIMENSIONS
15mm
42.5mm
104mm
To Next device
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