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Guidelines for water leak detection system with touch module and leak location up to 1 meter
Provide a complete system, including digital electronic alarm and location modules, modular sensor cables and point probes for water detection, ancillary accessories manufactured by nVent as the well-known nVent RAYCHEM TraceTek liquid leak detection and location system.
The system should be supplied with pre-connected sensor cable in its components with plastic connection connectors. In most cases, the sensor cable can be cleaned in place with a damp cloth. The sensor cable should be resistant to all liquids present in the designated areas so that it can be reused after drying and cleaning. The sensor cable and all interconnecting connecting and extension cables should meet the requirements of Class 2 for LSF (low smoke and vapor). It is forbidden to use polyethylene cables due to smoke and vapors generated during a fire. The sensor cable should be of an intense yellow color to facilitate identification in floor spaces, sewage sumps and general use areas. The wire should have a four-wire design to provide continuous verification of the integrity of the sensor circuit. The four wires shall have a fluoropolymer insulation or sheath and be spirally wrapped around a central fluoropolymer core. The sensor wire should be of such a design that no metal parts are exposed to avoid corrosion. The sensor wire system will be equipped with modular branch connectors to introduce tee connections into the system. (The sensor cable is nVent RAYCHEM Tracetek TT1000 / TT1100.)
WATER DETECTION SENSORS
The system should support several types of water detection sensors for detecting water leaks at specific points. Each sensor should be equipped with pre-installed connectors for connection to the TraceTek system.
Floor/wall-mounted probe - designed to be placed or mounted to detect water in a specific area. The probe can be mounted on the floor or on the wall. The low-profile, powder-coated orange epoxy paint will ensure that the probe will not fall over, and the bright color will provide good visibility. The ends of the water sensor should be made of stainless steel to eliminate the possibility of corrosion.
Drainage probe - designed to be placed in a drain or low point to detect collected water. The probe will have a diameter of 17 mm or less to easily fit into drains or low points. The ends of the water sensor should be made of stainless steel to eliminate the possibility of corrosion.
Float probe - designed to detect the water level and report when the water reaches a certain level. This is to be used when the presence of water is normal or acceptable up to a certain point.
The digital alarm panel (nVent RAYCHEM Tracetek TT-TS12 or TT-TS12-E) should be able to monitor up to 250 digital sensor interface modules (TTSIM with the ability to monitor up to 1,500 meters of senor wires per circuit) with accurate leak location within +/- 1m. The alarm panel will feature a 12-inch SVGA TFT LCD color display with touchscreen for user interaction and control. Degree of protection is provided by NEMA4, IP65 front panel, NEMA1, IP10 enclosure
When a leak is detected in any of the nVent RAYCHEM (TTSIM) sensor interface modules, the alarm panel shall:
- Identify the reporting digital TTSIM module on the touch screen
- Display the digital leakage value of the liquid position on the touch screen
- Enable the output relay
- Provide a visual leak map accessible via the touchscreen that displays a flashing "LEAK" icon on a user-designated background image
- Enable an audible alarm
- Send an email or text message to designated personnel if desired by the user.
- Recording and storing details of the leak event in a log file that can be viewed directly from the alarm panel.
The visual background image of a leak map can be a floor plan showing where a sensor wire has been installed, a pipe or tank plan, or up to 250 graphics or images of a single piece of equipment, with each image containing up to 100 "mapping points" so that multiple branch circuits or complex sensor wire layouts can be easily captured for future display of leak locations. Mapping points are entered during initial commissioning and startup services to provide a reference for displaying leak locations and can be displayed in English, French and German.
The nVent RAYCHEM Tracetek alarm panel (TT-TS12 or TT-TS12-E) is equipped with a security password to access the maintenance menu. It reports the date and timestamp and records all alarm events in non-volatile memory in an event history log. Built-in memory for up to 5,000 events, including export of data to a USB flash drive in XML format for offline analysis. All software updates will be available for download when they become available.
The control panel shall have the ability to communicate digitally with host systems via RS 485 (2 wires) DB-9 interface in Modbus protocol or via RJ41 Ethernet interface in TCP / IP, at the user's discretion.
The digital alarm panel (TT-TS12 or TT-TS12-E) indicates the status of each digital location module (TTSIM) with the following color code: "monitoring" (green), "service required" (yellow), "leakage "(red)," fault "(red). These should trigger an audible alarm, a leak LED indication on the unit's front panel, and should activate a remote alarm relay. The location of the first water contact should be retained on the display until the cable dries out and the module is reset. The current system status shall also be displayed.
LOCATION OF SENSOR INTERFACE MODULES
The digital sensor interface modules (TTSIM) should detect water contact with the sensor cable and locate the source of the leak with an accuracy of +/- 1 m.
The digital sensor interface modules (TTSIM) should continue to monitor the sensor wires for the spread or migration of the initial water leak. It should also allow the sensor wire to monitor for additional leaks that are spatially separated from the initial event. Upon detection of a second event, or if the initial leak is found to have spread beyond the zone of the earlier localized leak, the control panel shall re-alert with an audible alarm, alphanumeric message and event logging.
The digital sensor interface modules (TTSIM) should continuously monitor the sensor wire for contamination accumulation and alert the operator via a touchscreen control panel when contamination is detected. Upon detection of a contamination event on any of the sensor wires, the control panel shall result in tripping of the service relay, an alphanumeric service message and storing the event in non-volatile memory.
The digital sensor interface modules (TTSIM) shall continuously monitor the sensor wires for continuity errors. Loss of continuity of any of the wires should result in tripping of the fault relay, an alphanumeric status message indicating the fault, and storing the event in non-volatile memory.
The digital sensor interface modules (TTSIM) shall not require additional programming by the operator upon startup and shall automatically calibrate after each power-up.
(The control panel and digital location modules shall be model TT-TS12 or TT-TS12-E with TTSIM-1/1A /2.)
System and product certifications: all products shall be manufactured in an ISO 9001 certified factory; copies of the certification shall be available upon request.
Mounting may take place after completion of all construction work on the installation sites, removal of all construction by-products, and cleaning of the site from dust, dirt, etc. The sensor cable system and alarm and location modules should be of a type that is simple to install, commission and maintain without the need for special tools, such as oscilloscopes, sine wave generators, etc. The sensor cable can be removed if local modifications to the building are necessary and installed back after the work is completed. The appointed contractor will ensure that the system is installed by a trained TraceTek partner who will create a graphical display map of the installation. The map should be of good quality and show the location of the alarm as well as location modules detecting the layout of cables, room landmarks. Upon completion of the installation, the TraceTek system will be commissioned according to the manufacturer's instructions by a trained TraceTek partner to ensure compliance with warranty requirements. The supplier of the water leak location system will provide a small portable test device for maintenance purposes. Features of the device include measured current flow levels and accurate location for testing sensor cables.