LIQUID LEAKAGE DETECTION SYSTEM
Part 1-GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract apply to this
section.
B. Requirements of the following Division 16 section applies to this
section:
1. “ Basic Electrical Materials and Methods”
2. “ Earthing”.
3. “Raceways”.
4. “Cable Trays”.
5. “Wiring Devices”.
1.02 SUMMARY
A. Scope of work consists of the installation of Liquid Leakage
Detection system including the but not limited to the following:
1. Control Panel.
2. Control cables.
3. Sensing cable.
4. All cables with connectors, conduits and
related accessories.
1.03 SUBMITTALS
A. Submit data for approval including catalogues and literature,
sufficiently detailed for engineering purposed, and with full
description of component and operating parameters.
B. Tests: equipment is to be tested for quality and operation at the
factory, and test certificates and reports are to be submitted to the
Engineer before dispatch to site.
C. As-Built Drawings: During the construction of the system, the
contractor shall put in writing all his remarks, during the progress of
work, concerning any suggested alternation from the shop drawings
in wiring routes, location of equipment or devices which arise from
coordination between the system and other activities. Submit a
complete sect of as-built drawings in hard and soft copies.
D. Records: submit maintenance manuals.
E. Shop and Construction Drawings: submit shop and construction
drawings for approval including, but not limited to, the following:
1. Detailed system schematic diagram.
2
2. Exact panels/cables locations, layouts, routing and
mounting details.
F. Wiring diagrams are to bear manufacturer’s signature indicating that
they have reviewed the drawings and that they are correct in respect
to sizes, wiring and configuration and will operate in accordance
with function, scope and intent of the specifications.
1.04 QUALITY ASSURANCE
A. System is to be in accordance to relevant EU regulations particularly
the EMC and low voltage directives “CE” marked accordingly,
TUV be UL Listed.
B. Manufacturer of the Leak Detection system shall be regularly
engaged in manufacturing of Leak Detection system of type, size
and characteristics similar to those required for the project and
whose products have been in satisfactory service in similar projects
for not less than fire years.
C. Engage an experienced installer who is a factory authorized sales
and service representative to perform the Leak Detection work. The
installer shall have at least five years of successful installation
experience of Leak Detection system similar to that required for this
project.
D. Equipment’s manufacturer and his authorized, local representative
shall provide, in depth, equipment service and programming on site
training to selected employer’s personnel.
PART 2 - PRODUCTS
2.01 MANUFACTURERS
A. Approved manufacturers: are subject to compliance with requirements,
specifications, regulations and drawings..
B. Refer to the list of approved manufacturers.
2.02 SYSTEM REQUIREMENTS
A. To provide a liquid leak detection and locating system to give the earliest
warning of a leak which may enter or affect rooms shown in the single line
diagram.
B. The system should provide an alarm giving an accurate location of a leak at a
specific point or zone. Leak detection should Provide a general alarm
indicating a leak has occurred somewhere/ anywhere within the detection
network area.
C. The system shall comprise a network of sensing devices connected to locally
located control panel. The sensing devices should include water sensing
cables, water sensing probe and any other type of liquid sensing device such as
sensing pads, pipe-in-pipe probes, Whichever type of sensor is used It is
recognised that liquid must touch a sensing device for an alarm to be activated.
3
D. The leak detection system will continuously monitor the network of sensing
devices and give an alarm in the event of detecting a leak or system/sensing
device malfunction, damage or disconnection.
E. A control panel will be capable of monitoring of sensing cable and/or probe
sensors or a combination thereof a proposal should be submitted to suit each
room).The length and/or number of sensing cable or devices and their
installation disposition shall be as recommended by the specialist
sub-contractor or supplier in accordance with the general requirement
F. The system shall be capable of reporting the location of a leak to a sufficiently
accurate position to enable the operator to locate and identify the activated
section of detection cable, or individual (or group of) probe device(s) quickly
and accurately.
G. A control panel shall be capable of providing the level of accuracy of leak
detection required. This may be achieved by applying a contiguous number of
separately reporting zones of appropriate length or by a system which will
report the position of a leak as a measurement of metres along the defined
route of a sensor. Wherever possible the allocation and installation of sensor
lengths or zones shall be arranged to coincide with defined areas or
“land-marks”, individual rooms, partition walls or other easily identifiable
features. This is to facilitate speedy and positive leak location.
2.03 LEAK DETECTION SENSOR CABLE/TAPE
A. Where local codes and regulations require, the sensor cable shall be made from
Low Smoke and Fume – Zero Halogen (LSF0H) materials for smoke
reduction and low toxicity. The cable shall be made from durable,
non-deteriorating materials and have no exposed metallic parts. It shall not be
adversely affected by the build up of dust or other dry dirt / debris.
B. The sensor cable shall be available in rolls for cutting and terminating on site
or in pre-connected lengths.
C. In the event of damage or irrevocable contamination the affected part of the
cable should be capable of on-site repair. It should not be necessary to replace
the whole length.
D. Application
Leak detection cable
1. Installed under the raised floor in an open wave/loop or “serpentine” pattern
backward and forwards across the floor.
2. Installed to provide general coverage of the area. Each “leg” or “loop” to be
at (1, 2, 3, 4) meter pitch or spacing.
3. Installed under the raised floor routed (around the perimeter of the area) (in
front of any A/C units, pipework etc. to ensure a “barrier” or line is provided
over which liquid must pass prior to passing into the critical area.
E. The cable will be fixed to the floor at approximately 3 metre intervals and at
every change in direction. Acceptable fixings will be drilled and plugged
4
flame retardant nylon “P” clips, self-adhesive clips, cold adhesive/hot-glue
clips, hammered or pin-plugged cable clips or other approved fixing. Adhesive
fixings will only be used where the floor finish is clean, stable and
non-dusting. Only self-adhesive, cold adhesive or hot-glued clips will be
permitted in drip trays.
(Where hot-glue is used the application gun must only be of the gas powered catalytic
sort and have no exposed flame.)
F. Identification/warning tags will be attached to the cable every 3 - 4 metres.
Tags will state purpose of cable and will show any relevant information (such
as zone number or distance reference) to confirm the location of that particular
part.
G. Special Junction Boxes (or other device) will be used for zone changes and
connection to leader cables. To confirm location the Junction Boxes will be
labelled showing its reference number and the preceding and following zone
numbers.
H. Appropriate connectors will be used to join separate cable lengths and leader/
jumper cables. To confirm location the connectors will be labelled showing
any reference number and relevant location information.
2.04 Leak Location
A. The water detection system will be applied and mapped in such a way as to
make the part of the sensor network detecting the leak easy to identify and
physically locate. This may be achieved by sub-dividing the sensor network
into a series of separately reporting zones or by a system which, uses a sensor
cable which will report the location of a leak via a distance measurement
displayed on the control. In any event the information the distance
measurement or zone displayed by the control panel shall be cross-referenced
to a map, chart or diagram which shall clearly show the routing of the sensor
network, its relationship to the building layout and any fixed zone positions or
cumulative distance marks.
2.05 Standards.
The leak detection cable shall be:-
A. Supplied in rolls for cutting and jointing according to site requirements or
supplied as pre-connected standard lengths.
B. Capable of repeated re-use - (wetting then drying).
C. (If damaged or irrevocably contaminated) capable of being spliced/ jointed or
repaired on site with the minimum of wastage.
D. Robust construction - resistant to moderate physical abuse
E. Resistant to temperatures up to 100OC
F. No exposes metal parts
G. Not affected by dust and debris
H. Capable of being attached directly to bare metal surfaces or pipes without
“shorting” or other interference.
5
I. Capable of being monitored along its entire length for damage or
disconnection.
2.06 POINT SENSORS AND OTHER DEVICES
A. The system will be capable of using other types of water/liquid sensing
devices (in addition to, and/or instead of, detection cable on the same control
system) as required and where detection cable is unsuitable.
These may include:
1. Point Sensors (plus any protective Guard Plates and mounting devices)
2. Pad Sensors
2.07 CONTROL CABLES
Control cables will be LSF Zero Halogen double insulated, multi-core, 7/0.2
strands (or solid equivalent) or similar. All leader cables must be monitored along
their entire length for damage or disconnection.
2.08 CONTROL PANEL
A. The control panel will give a full range of status indicators - mains /battery
etc. and visual and audible alarms for -
1. LEAK – showing affected zone / leak location
2. SYSTEM FAULT - detection device and/or leader cable damage Short circuit
or - disconnection /break - Open circuit
both occurrences will show the affected zone / fault location
B. MULTIPLE ALARMS
1. The control panel should be able to locate, accept, display and store
concurrent and/or consecutive multiple alarms and show the exact status
of all zones at all times (Leak, System Fault or Quiet).
C. OUTPUTS AND COMMUNICATION
1. Volt free contact changeover relay outputs will be provided for connection to
BMS or other remote alarm or monitoring system. As a minimum these will
include:- Common Leak, Common System Fault, Mains Fail/All Fail
2. The option for individual zone outputs should also be available. Serial
connections (via RS232, RS485 or similar) will be available for
communication of system status and all alarm conditions to the BMS.
3. Two status indications shall be reported to the fire alarm system (fault and
alarm) via two monitor modules connected to the fire alarm loop (in fire alarm
scope of work).
D. OPERATION
1. The control panel should be mains operated (220/230VAC 50Hz) and must
include a trickle charged sealed lead-acid stand-by battery capable of
maintaining the system for 24 hours in quiet monitoring mode.
6
E. Sensitivity
1. The sensitivity of the system must be adjustable to suit particular site
conditions.
PART 3 – EXECUTION
3.01 INSTALLATION:
A. Equipment: install in accordance with manufacturer’s instructions
and to the approval of the Engineer. Mount equipment in alignment
with other building fixtures and fix firmly in place with all supports
and fastenings secured.
B. Interference Protection: equipment is to be installed to prevent
electromagnetic, electrostatic or other outside interference impairing
system performance.
C. Accessibility: equipment is to be installed to be readily accessible
for operation, maintenance and repair. Minor deviations from the
Drawings may be made, but no changes are to be made without
prior approval.
D. Routing: of signal cables, power and control cables, in general, are
to be in separate raceways.
3.02 TESTING & TRAINING
Superintendence: equipment manufacturer is to provide an engineer and
technician qualified in the operation of the system and equipment
performance and the requirements of the Specification, to assist the Engineer
to test and verify the system performance.
Test Equipment: provide diagnostic equipment required to perform system tests
and measurements
END OF SECTION 16830
Part 1-GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract apply to this
section.
B. Requirements of the following Division 16 section applies to this
section:
1. “ Basic Electrical Materials and Methods”
2. “ Earthing”.
3. “Raceways”.
4. “Cable Trays”.
5. “Wiring Devices”.
1.02 SUMMARY
A. Scope of work consists of the installation of Liquid Leakage
Detection system including the but not limited to the following:
1. Control Panel.
2. Control cables.
3. Sensing cable.
4. All cables with connectors, conduits and
related accessories.
1.03 SUBMITTALS
A. Submit data for approval including catalogues and literature,
sufficiently detailed for engineering purposed, and with full
description of component and operating parameters.
B. Tests: equipment is to be tested for quality and operation at the
factory, and test certificates and reports are to be submitted to the
Engineer before dispatch to site.
C. As-Built Drawings: During the construction of the system, the
contractor shall put in writing all his remarks, during the progress of
work, concerning any suggested alternation from the shop drawings
in wiring routes, location of equipment or devices which arise from
coordination between the system and other activities. Submit a
complete sect of as-built drawings in hard and soft copies.
D. Records: submit maintenance manuals.
E. Shop and Construction Drawings: submit shop and construction
drawings for approval including, but not limited to, the following:
1. Detailed system schematic diagram.
2
2. Exact panels/cables locations, layouts, routing and
mounting details.
F. Wiring diagrams are to bear manufacturer’s signature indicating that
they have reviewed the drawings and that they are correct in respect
to sizes, wiring and configuration and will operate in accordance
with function, scope and intent of the specifications.
1.04 QUALITY ASSURANCE
A. System is to be in accordance to relevant EU regulations particularly
the EMC and low voltage directives “CE” marked accordingly,
TUV be UL Listed.
B. Manufacturer of the Leak Detection system shall be regularly
engaged in manufacturing of Leak Detection system of type, size
and characteristics similar to those required for the project and
whose products have been in satisfactory service in similar projects
for not less than fire years.
C. Engage an experienced installer who is a factory authorized sales
and service representative to perform the Leak Detection work. The
installer shall have at least five years of successful installation
experience of Leak Detection system similar to that required for this
project.
D. Equipment’s manufacturer and his authorized, local representative
shall provide, in depth, equipment service and programming on site
training to selected employer’s personnel.
PART 2 - PRODUCTS
2.01 MANUFACTURERS
A. Approved manufacturers: are subject to compliance with requirements,
specifications, regulations and drawings..
B. Refer to the list of approved manufacturers.
2.02 SYSTEM REQUIREMENTS
A. To provide a liquid leak detection and locating system to give the earliest
warning of a leak which may enter or affect rooms shown in the single line
diagram.
B. The system should provide an alarm giving an accurate location of a leak at a
specific point or zone. Leak detection should Provide a general alarm
indicating a leak has occurred somewhere/ anywhere within the detection
network area.
C. The system shall comprise a network of sensing devices connected to locally
located control panel. The sensing devices should include water sensing
cables, water sensing probe and any other type of liquid sensing device such as
sensing pads, pipe-in-pipe probes, Whichever type of sensor is used It is
recognised that liquid must touch a sensing device for an alarm to be activated.
3
D. The leak detection system will continuously monitor the network of sensing
devices and give an alarm in the event of detecting a leak or system/sensing
device malfunction, damage or disconnection.
E. A control panel will be capable of monitoring of sensing cable and/or probe
sensors or a combination thereof a proposal should be submitted to suit each
room).The length and/or number of sensing cable or devices and their
installation disposition shall be as recommended by the specialist
sub-contractor or supplier in accordance with the general requirement
F. The system shall be capable of reporting the location of a leak to a sufficiently
accurate position to enable the operator to locate and identify the activated
section of detection cable, or individual (or group of) probe device(s) quickly
and accurately.
G. A control panel shall be capable of providing the level of accuracy of leak
detection required. This may be achieved by applying a contiguous number of
separately reporting zones of appropriate length or by a system which will
report the position of a leak as a measurement of metres along the defined
route of a sensor. Wherever possible the allocation and installation of sensor
lengths or zones shall be arranged to coincide with defined areas or
“land-marks”, individual rooms, partition walls or other easily identifiable
features. This is to facilitate speedy and positive leak location.
2.03 LEAK DETECTION SENSOR CABLE/TAPE
A. Where local codes and regulations require, the sensor cable shall be made from
Low Smoke and Fume – Zero Halogen (LSF0H) materials for smoke
reduction and low toxicity. The cable shall be made from durable,
non-deteriorating materials and have no exposed metallic parts. It shall not be
adversely affected by the build up of dust or other dry dirt / debris.
B. The sensor cable shall be available in rolls for cutting and terminating on site
or in pre-connected lengths.
C. In the event of damage or irrevocable contamination the affected part of the
cable should be capable of on-site repair. It should not be necessary to replace
the whole length.
D. Application
Leak detection cable
1. Installed under the raised floor in an open wave/loop or “serpentine” pattern
backward and forwards across the floor.
2. Installed to provide general coverage of the area. Each “leg” or “loop” to be
at (1, 2, 3, 4) meter pitch or spacing.
3. Installed under the raised floor routed (around the perimeter of the area) (in
front of any A/C units, pipework etc. to ensure a “barrier” or line is provided
over which liquid must pass prior to passing into the critical area.
E. The cable will be fixed to the floor at approximately 3 metre intervals and at
every change in direction. Acceptable fixings will be drilled and plugged
4
flame retardant nylon “P” clips, self-adhesive clips, cold adhesive/hot-glue
clips, hammered or pin-plugged cable clips or other approved fixing. Adhesive
fixings will only be used where the floor finish is clean, stable and
non-dusting. Only self-adhesive, cold adhesive or hot-glued clips will be
permitted in drip trays.
(Where hot-glue is used the application gun must only be of the gas powered catalytic
sort and have no exposed flame.)
F. Identification/warning tags will be attached to the cable every 3 - 4 metres.
Tags will state purpose of cable and will show any relevant information (such
as zone number or distance reference) to confirm the location of that particular
part.
G. Special Junction Boxes (or other device) will be used for zone changes and
connection to leader cables. To confirm location the Junction Boxes will be
labelled showing its reference number and the preceding and following zone
numbers.
H. Appropriate connectors will be used to join separate cable lengths and leader/
jumper cables. To confirm location the connectors will be labelled showing
any reference number and relevant location information.
2.04 Leak Location
A. The water detection system will be applied and mapped in such a way as to
make the part of the sensor network detecting the leak easy to identify and
physically locate. This may be achieved by sub-dividing the sensor network
into a series of separately reporting zones or by a system which, uses a sensor
cable which will report the location of a leak via a distance measurement
displayed on the control. In any event the information the distance
measurement or zone displayed by the control panel shall be cross-referenced
to a map, chart or diagram which shall clearly show the routing of the sensor
network, its relationship to the building layout and any fixed zone positions or
cumulative distance marks.
2.05 Standards.
The leak detection cable shall be:-
A. Supplied in rolls for cutting and jointing according to site requirements or
supplied as pre-connected standard lengths.
B. Capable of repeated re-use - (wetting then drying).
C. (If damaged or irrevocably contaminated) capable of being spliced/ jointed or
repaired on site with the minimum of wastage.
D. Robust construction - resistant to moderate physical abuse
E. Resistant to temperatures up to 100OC
F. No exposes metal parts
G. Not affected by dust and debris
H. Capable of being attached directly to bare metal surfaces or pipes without
“shorting” or other interference.
5
I. Capable of being monitored along its entire length for damage or
disconnection.
2.06 POINT SENSORS AND OTHER DEVICES
A. The system will be capable of using other types of water/liquid sensing
devices (in addition to, and/or instead of, detection cable on the same control
system) as required and where detection cable is unsuitable.
These may include:
1. Point Sensors (plus any protective Guard Plates and mounting devices)
2. Pad Sensors
2.07 CONTROL CABLES
Control cables will be LSF Zero Halogen double insulated, multi-core, 7/0.2
strands (or solid equivalent) or similar. All leader cables must be monitored along
their entire length for damage or disconnection.
2.08 CONTROL PANEL
A. The control panel will give a full range of status indicators - mains /battery
etc. and visual and audible alarms for -
1. LEAK – showing affected zone / leak location
2. SYSTEM FAULT - detection device and/or leader cable damage Short circuit
or - disconnection /break - Open circuit
both occurrences will show the affected zone / fault location
B. MULTIPLE ALARMS
1. The control panel should be able to locate, accept, display and store
concurrent and/or consecutive multiple alarms and show the exact status
of all zones at all times (Leak, System Fault or Quiet).
C. OUTPUTS AND COMMUNICATION
1. Volt free contact changeover relay outputs will be provided for connection to
BMS or other remote alarm or monitoring system. As a minimum these will
include:- Common Leak, Common System Fault, Mains Fail/All Fail
2. The option for individual zone outputs should also be available. Serial
connections (via RS232, RS485 or similar) will be available for
communication of system status and all alarm conditions to the BMS.
3. Two status indications shall be reported to the fire alarm system (fault and
alarm) via two monitor modules connected to the fire alarm loop (in fire alarm
scope of work).
D. OPERATION
1. The control panel should be mains operated (220/230VAC 50Hz) and must
include a trickle charged sealed lead-acid stand-by battery capable of
maintaining the system for 24 hours in quiet monitoring mode.
6
E. Sensitivity
1. The sensitivity of the system must be adjustable to suit particular site
conditions.
PART 3 – EXECUTION
3.01 INSTALLATION:
A. Equipment: install in accordance with manufacturer’s instructions
and to the approval of the Engineer. Mount equipment in alignment
with other building fixtures and fix firmly in place with all supports
and fastenings secured.
B. Interference Protection: equipment is to be installed to prevent
electromagnetic, electrostatic or other outside interference impairing
system performance.
C. Accessibility: equipment is to be installed to be readily accessible
for operation, maintenance and repair. Minor deviations from the
Drawings may be made, but no changes are to be made without
prior approval.
D. Routing: of signal cables, power and control cables, in general, are
to be in separate raceways.
3.02 TESTING & TRAINING
Superintendence: equipment manufacturer is to provide an engineer and
technician qualified in the operation of the system and equipment
performance and the requirements of the Specification, to assist the Engineer
to test and verify the system performance.
Test Equipment: provide diagnostic equipment required to perform system tests
and measurements
END OF SECTION 16830
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