Category: Tyco Thermal Controls TraceTek Leak Detection TraceTek
Design Guide
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Tyco Tracetek
Leak Detection - Design Guide
Design Guide – TraceTek Leak Detection
TraceTek leak detection systems can be utilised in a variety of
installations to detect water, chemical or fuel leaks. TraceTek sensor
cables detect and locate leaks along their entire length. TraceTek point
sensors detect leaks at a specific point. Virtually any number of point
sensors can be combined with sensor cable on a leak detection single
circuit.
The following information is provided for initial guidance only.
Complete product information, including selection guides, data sheets,
installation instructions and operating manuals, can be downloaded from
our website.
Sensor Selection
The first design task is to select the most appropriate sensor type
based on the liquid to be detected and the area to be monitored.
TT1000-POINT-PROBE should be selected for water detection in areas
requiring only a single point of detection, such as drip trays under
HVAC units.
TT1000 sensor cable should be selected for water detection in commercial
building applications where larger area coverage is required, such as
under raised floors in computer or telecom rooms, in building
service/utility areas, etc.
TT3000 sensor cable should be selected for aqueous chemical detection or
for water detection in double contained pipe systems.
TT5000 sensor cable should be selected for fuel and oil detection.
TT5001 sensor cable should be selected for organic solvent detection.
TT7000 sensor cable should be selected for strong acid detection.
Sensor Layout
The next design task is to determine the optimum sensor layout. The
sensing cable or point probe should be positioned so that leakage from
the potential leak sources will contact the sensor quickly, before
reaching any critical equipment, cables or other items to be protected.
Perimeter Protection – lay the sensing cable along the perimeter of the
room, at a minimum of 600 mm from the wall.
Surface Protection – lay the sensing cable in a serpentine pattern
(typically on a 1.2 to 2 meter pitch) to protect larger surface areas.
Around Equipment – lay the sensing cable around equipment so that leaks
can be detected before spreading out.
Interconnecting Separate Areas – jumper cables, branch connectors, and
weighted length modules can be used to connect sensors from separate
areas into a single circuit, as illustrated below:
Alarm Module Selection
Depending on the size of the leak detection system and accessibility
of the sensors, an appropriate alarm (or alarm and locating) module must
be selected.
Small Area Circuits – for small leak detection circuits (normally those
less than 40 meters of sensor cable in a single area), a simple alarm
module may be selected. The TraceTek TTC, TTA-S IM and SZA modules
provide local indication of the system operating status via LEDs, plus
voltage-free contacts for remote connection to external alarm signals,
remote annunciation panels, or building management systems. A typical
circuit is shown below:
Large Circuits, Concealed Sensors, or Separated Areas – for large
circuits (normally more than 40 meters or where sensors are distributed
between several separate areas) or installations where the sensor is
concealed and normally inaccessible, an alarm and location module is
most appropriate. The TTDM-128 provides voltage-free alarm contacts,
4-20 mA output, and digital communication via simple RS-485 wiring and
the ModBus protocol.
Alternatively, TTSIM modules can be connected either to the TTDM-128 or
directly to a building management system via RS-485 wiring. The TTSIM
supports ModBus and Johnson Controls Metasys protocols directly,
providing complete sensor status and leak location information digitally
to the host system. The TTDM-128 can be connected to as many as 128
TTSIMs via a single RS-485 network, allowing extremely large leak
detection systems to be easily configured and integrated.
Accessories
A variety of accessories are available to complete your system and
make installation easy. Most accessories must be specified with type PC
(for use with TT1000 sensors) or type MC (for use with all other
sensors) connectors.
TT-MLC modular leader cable – used to connect sensor circuits to alarm
modules.
TT-MJC modular jumper cable – used to interconnect sensor circuits.
TT-MBC modular branch connectors – used to layout circuits in a variety
of branched configurations.
TT-WL weighted length – provides an artificial circuit length of 4.5
meters,
in order to clearly separate sensor sections that are on the same
circuit but in different areas.
TT-MET modular end termination, required at the end of each sensor
circuit.
TT-TAG – plastic tags used for clearly identifying TraceTek sensors, and
for tagging mapping data on the sensor.
TT-HDC – hold down clips, available in two sizes: ¼ inch for TT1000 and
TT3000 sensors, and ½ inch for TT5000 and TT5001 sensors.
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Authorised distributor:
Aquilar Ltd.
Dial Post Court
Horsham Road
Rusper
West Sussex
RH12 4QX
Tel : 01293 871874
Fax : 08707 940320
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