SGB DLR-P Manual 

DLR-P Z – 65.26-349 Documentation DLR - P No.: 604 202 Issue: 11/2009 SICHERUNGSGERÄTEBAU GMBH Hofstraße 10 57076 Siegen

OVERPRESSURE LEAK DETECTOR DLR.. - Ü-1 - Overview of the design variants The overpressure leak detectors of the DLR-series are available in different designs which are described in detail by the suffix characters. DLR-… …. PM “Manometer“, the leak detector is equipped with a digital pressure display in the hous- ing cover. “Protected“ construction of the leak detector in a weatherproof housing. “Numerical value”, for the alarm pressure of the leak detector in bar. The alarm pressures range from 1 bar to 18 bar. “G = gas(bottle)“, a pressure gas bottle is used for pressure generation, normally nitrogen. “P = Pump“, a pump integrated in the leak detector is used for pressure generation. ”GS = gas (-bottle)”, a static pressure generator must be brought to the site since the leak detector does not have a pump or automatic feed mechanism. “Pressure Leak detector Pipe”, the leak detector operates with overpressures towards the atmosphere and is de- signed for application on double-walled pipes. 11/09/2006 Your partner for Leak Detection Technology Sicherungsgerätebau GmbH, Siegen 2/38

DLR- P .. Content 1 Technical description for the overpressure leak detector DLR-P 13 pages 2 Drawings to the technical description 7 pages 3 Appendix to the technical description 4 pages 3.1 Appendix TD 3.2 Appendix TF 3.3 Statement 4 Declaration of conformity 1 page 5 Measuremt and Drilling 2 pages 6 Working sheet AB-820 500 pneumatic connections 2 pages 7 Approval of the DIBT 5 pages 06/04/2006 - 1 - 3/38

DLR- P .. Contents Page 1 Subject 2 2 Field of application 2 2.1 Requirements for interstitial spaces 2 2.2 Pipes 2 2.3 Fittings 2 2.4 Materials carried in the pipes / leak detection medium 2 3 Description of functions and operation 3 3.1 Switching values and pressure values 3 3.2 Normal operation 4 3.3 Functions in the event of a leak 4 3.4 Air drying / dry filter 4 3.5 Description of the display and control elements 5 4 Installation and assembly instructions 5 4.1 General notes 5 4.2 Personal safety equipment 6 4.3 Installation of the leak detector 6 4.4 Installation of the connecting lines (leak detector -> interstitial space) 6 4.5 Installation of the dry filter 7 4.6 Electrical connections 7 4.7 Example installation 7 5 Commissioning / repairs 7 6 Operating instructions 8 6.1 General notes 8 6.2 Maintenance 8 6.3 Intended use 9 6.4 Functional tests 9 6.5 Alarm / fault 12 7 Disassembly 12 8 Marking 12 9 Abbreviations 13 DIAGRAMS: Location of the test cocks P – 078 000 Installation example 1 M1 – 078 000 Installation example 2 M2 – 078 000 Installation example 3 M3 – 078 000 Installation example 4 M4 – 078 000 Current flow diagram SL – 853 600 Test device P – 115 395 APPENDIX: TD Technical data TD – 1 22/01/2009 - 1 - 4/38

DLR- P .. 1. Subject Overpressure leak detector for double walled pipes, double walled fittings or a combination of the above with air used as the leak detection medium. DLR-P .. The dots are used in place of the alarm pressure. The alarm pressure may also be followed by letters to describe the design variant of the leak detector in more detail. 2. Field of application 2.1. Requirements for interstitial spaces • Verified pressure resistance of the interstitial spaces (see section 3.1) • Verification of suitability of the interstitial space (for Germany: Allgemeine bauaufsichtliche Zulassung (General Building Authority Approval), approval in individual cases). • Tightness of the interstitial space (see section 6.4.7) • The number of interstitial spaces to be monitored depends on the overall volume of the interstitial space. According to EN 13160, this must not exceed 10m3. In order to make it possible to verify the tightness of the interstitial space, we recommend that a value of 4 m3 is not exceeded. The length of pipe which is to be monitored (per pipe branch) should not exceed 2500 m, and it should comply with the approval requirements of the pipe. 2.2. Pipes Double walled pipes (overground and underground) made of metal or plastic, designs manufactured in the plant or on-site. For Germany: More far reaching requirements for double walled pipes may result from TRbF 50, the DIBt approval principles or EN 13160. 2.3. Fittings Double walled fittings (overground and underground) made of metal or plastic, designs manufactured in the plant or on-site. For Germany: with Allgemeine bauaufsichtliche Zulassung (General Building Authority Approval), provided this is not part of the approval of the pipeline. 2.4. Products conveyed in the pipes / leak detection medium • Liquids which are hazardous to waters with a flash point > 55°C • Liquids which are hazardous to waters with a flash point < 55°C ONLY for double walled pipes / fittings with walls which are permeation-proof on the side of the material being conveyed. On pipes / fittings which are permanently filled with liquid, it must be ensured that the equipment carrying the product (delivery pumps, ...) is suitable for zone 0, as air is forced into the product in the event of a leak. 22/01/2009 - 2 - 5/38

DLR- P .. • The product being conveyed must not react with the leak detection medium. • The resistance of the pipes / fittings to the material being conveyed must be verified by third parties (e.g. operator, manufacturer of the pipeline ...). 3. Description of functions and operation The overpressure leak detector DLR-P monitors both walls of a pipe/fitting for leaks. The monitoring pressure is high enough to ensure that leaks in the inner or outer wall are indicated through a pressure loss. In order to build up the pressure, air is sucked in from the outside by the integrated pump via a dry filter and then pumped to the interstitial space(s). The dry filter dries the outside air to a relative humidity of approximately 10%. The drying process is necessary in order to eliminate any accumulation of moisture or condensation in the interstitial space. Used dry filter cartridges should be regenerated or replaced. 3.1. Switching values and pressure values in bar Type DLR-P pDP [bar] pAE_ON [bar] pPA_OFF [bar] Switch position of the dip switch PÜDV 1 1 [bar] pTEST [bar] 1.1 < 0.1 > 1.1 < 1.45 1.6 ± 0.07 ≥ 2.0 1.5 < 0.5 > 1.5 < 1.9 2.2 ± 0.10 ≥ 2.5 2.0 < 1.0 > 2.0 < 2.4 2.7 ± 0.10 ≥ 3.0 2.3 < 1.3 > 2.3 < 2.8 3.1 ± 0.10 ≥ 3.5 2.5 < 1.5 > 2.5 < 2.9 3.2 ± 0.10 ≥ 3.5 3.0 < 2.0 > 3.0 < 3.4 3.8 ± 0.10 ≥ 4.2 _ Special values agreed between SGB and the customer. pDP Max. delivery pressure in the inner pipe pAE "Alarm ON" switching value – an alarm is triggered at the latest when this value is reached. pAA "Alarm OFF" switching value – the alarm is cancelled when this value is exceeded. The switching value "Alarm OFF" is approximately 100 mbar higher than the switching value "Alarm ON" (pAA = pAE + ~100 mbar) 1 In the table, the opening pressure of the overpressure valve is indicated at which the volumetric flow of the pump is stopped. The response pressure (initial opening) is lower. 22/01/2009 - 3 - 6/38

DLR- P .. pPA "Pump OFF“ switching value (=setpoint pressure) pPE "Pump ON" switching value The switching value "Pump ON“ is around 100 mbar lower than the switching value "Pump OFF" (pPE = pPA - ~100 mbar) pÜDV1 Opening pressure of overpressure valve (on the interstitial space side) The overpressure valves can be omitted if the test pressure of the interstitial space is ≥ 3 bar (type 1.1 and 1.5) or ≥ 10 bar (type 2.0 to 3.0). pTEST Minimum test pressure of the interstitial space 3.2. Normal operation The leak detector is connected via the connecting line(s) to the interstitial space(s). The overpressure generated by the pump is measured via a pressure sensor and regulated. When the operating pressure (Pump OFF) is reached the pump is switched off. Due to leaks in the leak detection system which are unavoidable, the pressure will start to slowly rise again. When the switching pressure "Pump ON" is reached the pump is switched on and the system builds operating pressure back up again. During normal operation, the leak detector fluctuates between these two pressure values, with short run-up times and longer standstill times which depend on the tightness and temperature fluctuations of the overall plant. 3.3. Functions in the event of a leak If a leak occurs on the inside wall or the outside wall then air will escape from the interstitial space. The pressure will drop until the pump is switched on in order to restore operating pressure. If the volumetric flow escaping through the leak is greater than the (limited) delivery rate of the pump then the pressure in the system drops and the pump runs in continuous operation. Any increase in the size of the leak leads to a further pressure loss until eventually the alarm pressure is reached. At this point the system will generate visual, audible and potential-free alarm outputs. 3.4. Air drying / dry filter The air supplied to the interstitial space is passed through a dry filter in the intake line. The dry filter dries the air to a relative humidity of around 10% in order to prevent corrosion and accumulation of condensation in the interstitial space. The dry filter is designed to last for a year provided the equipment is used for its proper intended use and no additional temperature fluctuations occur. Initially the dry filter is an orange colour, but this fades to a colourless (or green) state when the filter has been used up. Once the filter cartridge has been used up it should be replaced or regenerated. 22/01/2009 - 4 - 7/38

DLR- P .. 3.5 Description of the display and control elements 3.5.1 Display element states (signal lamps) for type DL .. Signal lamp Operating status Alarm status Alarm, audible alarm signal acknowledged Device fault OPERATION: green ON ON ON ON ALARM: red OFF ON FLASHING ON 3.5.2 Operating functions via pushbuttons Switching off the acoustic alarm signal: Briefly press the "Audible alarm" button once – the audible alarm signal is then switched off and the LED flashes. Pressing the button again will cause the audible signal to be switched on. (This function is not available in normal operation or during malfunctions.) Testing the visual and audible alarm signal Press the "Audible alarm" button and keep it pressed (approx. 10 seconds) – the alarm signals are triggered until the button is released again. This test is only possible if the pressure in the system has exceeded the "Alarm OFF" pressure level. Testing the tightness of the monitored system Press the "Audible alarm signal" button and keep it pressed until the "Alarm" signal lamp flashes at high speed, then release the button. A value for the tightness is indicated through illumination of the “Alarm” signal lamp. (see Appendix DP) For this test the leak detector must have performed at least 1 automatic feed interval in normal operation (i.e. without being filled by an assembly pump) in order to obtain a valid result. 4. Installation and assembly instructions 4.1. General notes (1) Installation and assembly must only be performed by qualified companies2. (2) The relevant accident prevention regulations of the Wasserhaushaltsgesetz (Water Resources Act, WHG) must be complied with. (3) Explosion protection requirements must be satisfied (where necessary), such as laws on the basis of the European Directive 1999/92/EG and/or other applicable codes. (4) A test valve should be provided at the leak detector opposite end of the pipe(s)/fitting(s). (5) Before accessing control shafts, measure the vapour-air mixture and the O2-level. 2 In Germany: Companies who have the status of a “qualified company” in the sense of §19I of the Wasserhaushaltsgesetz (Water Resources Act, WHG) 19l, who are qualified to carry out installations of leak detection systems and can demonstrate proof of expertise and knowledge in relation to fire safety and explosion protection. 22/01/2009 - 5 - 8/38

DLR- P .. 4.2. Personal safety equipment The parts listed here apply in particular to safety when working on plants which may pose an potentially risk of explosion. If work is carried out in industries in which it must be assumed that an explosive atmosphere is present then the following items of equipment are required as an absolute minimum: • Suitable clothing (risk of a build-up of electrostatic charge) • Suitable tools (compliant with EN 1127) • A suitable gas warning device which is calibrated for the existing vapour-air mixture (work should only be performed at a concentration of 50% below the lower explosion limit)3 • Measuring device for determining the oxygen content of the air (Ex / O meter) 4.3. Installation of the leak detector (1) Generally in a wall-mounted installation with wall plugs and screws. (2) In a dry room, or out in the open in a suitable housing. (3) NOT in areas with a potentially risk of explosion. (4) The distance between the leak detector and the interstitial space should be kept as short as possible (refer also to the next section). 4.4. Installation of the connecting lines (leak detector -> interstitial space) (1) Metal (generally copper) or plastic tubes with a pressure resistance corresponding to at least the test pressure of the interstitial space – also applies to fittings and unions. (Observe the temperature range, particularly when using plastic materials.) (2) Clear width at least 6 mm. (3) 50 m should not be significantly exceeded – but if so: use a tube with a greater clear width with corresponding bridging pieces. (4) The full cross-section must be retained. Pinching and kinking4 are not permitted. (5) Metal or plastic tubes underground, or plastic tubes routed overground should be routed inside a conduit. (6) The conduit should be sealed gas-tight. (7) The pressure and measuring lines can be combined together underneath the leak detector via pulsation damper 107 (see installation examples). (8) Avoid any build-up of electrostatic charge (e.g. when drawing in lines). (9) For details of the connection technology to be used refer to Work Sheet AB-820 500 (see Information). 3 Other %-specifications may result from works-specific or German Land-specific regulations. 4 If required, commercially available shaped sections should be used for plastic tubes (pre-defined bending radii) 22/01/2009 - 6 - 9/38

DLR- P .. 4.5. Installation of the dry filter (1) Preferably close to the leak detector. (2) Vertical with the intake opening facing down, using the enclosed installation materials. (3) The dry filter and in the intake connection port of the leak detector should be connected via a PVC hose (or similar). 4.6. Electrical connections (1) Power supply: in accordance with the imprint on the type plate. (2) Hard wired, i.e. no plug-in or switchable connections. (3) The regulations of the electricity supply companies must be satisfied5. (4) Terminal assignment: (see also SL-853 600) 1 / 2 Mains connection 3 / 4 Assigned (to the internal pump) 5 / 6 External signal (in the event of an alarm, mains voltage is present here - it is switched off by pressing the "Audible alarm" button). 11 / 12 Potential-free contacts (open in the event of an alarm and in the event of a power loss) 4.7. Example installation Example installations are shown in the Appendix. 5. Commissioning / repairs (1) Note the requirements in section 4. (2) If a leak detector is taken into operation on a pipe (fitting) which is already in operation, then special protection measures need to be put in place (e.g. checking that the leak detector and/or the interstitial space is free of gas). Further measures may depend upon the local conditions and should be assessed by qualified personnel. (3) Once the pneumatic connections have been made, make the electrical connections. (4) Check that the signal lamps for "Operation" and "Alarm" light up and that the audible alarm signal sounds, if necessary switch off the alarm. (5) Connect the three-way cock 21 in the position "III", connect a gauge. (Drawing: P-078 000) (6) The leak detection system should be supplied with the operating pressure according to the table on page 3. (Use of an assembly pump, with sufficiently dimensioned dry filter or a nitrogen pressure cylinder). 5 In Germany: compliance is also required with the VDE regulations. 22/01/2009 - 7 - 10/38

DLR- P .. (7) Build-up of pressure with the assembly pump or the pressure cylinder (observe the pressure settings) - can be performed directly via the pressure line or via the three-way cock 20 (position IV). Note: If no pressure is built up with the assembly pump (or pressure gas canister) connected, then the leak should be located and rectified (if required check that the delivery rate of the assembly pump and the settings of the pressure reducer are correct). (8) Once the operating pressure of the leak detector has been reached (pressure generation inside the leak detector switches off), reconnect the high-pressure line and/or set both cocks to "I", remove the pressure measuring instrument. (9) Functional test according to section 6.4.1. 6. Operating instructions 6.1. General notes (1) It can be assumed that the system will work correctly without any problems if the leak detection system is installed correctly without leaks. (2) If the pump comes on frequently or runs continuously then this indicates that leaks are present which will require attention within due course. (3) If an alarm is triggered locate and rectify the cause quickly. (4) Explosion protection requirements must be satisfied (where necessary), such as laws on the basis of the European Directive 1999/92/EG and/or other applicable codes. (5) Disconnect the power supply to the leak detector whenever performing servicing work on it. (6) The signal lamp "Operation" goes out if there is a break in the current supply. Alarm signals are sent out via the potential-free relay contacts (if used). After the interruption in the current supply, the green signal lamp comes back on and the alarm signal which is output via the potential-free contacts is cancelled (unless the pressure has dropped below the alarm pressure while the current supply was interrupted.) (7) The filter cartridge should be replaced or regenerated when it changes colour from orange to having no colour (or green, depending on the type of drying material). 6.2. Maintenance 6.2.1 Performed by the operator (1) The dry filter should be checked at regular intervals6 . The filter cartridge should be replaced or regenerated when it changes colour from orange to having no colour (or green). 6 A gap of at least 2 months is recommended. 22/01/2009 - 8 - 11/38

DLR- P .. 6.2.2 Maintenance work and functional tests performed by qualified persons7. (1) Testing once a year for functional and operational reliability and safety. (2) Test scope according to section 6.4. (3) It should also be checked that the conditions in sections 4, 5 and 6.2 are satisfied. 6.3. Intended use • For double walled pipes/fittings • Vapour-air mixtures which may potentially arise due to – the liquid being conveyed, – the liquid being conveyed in conjunction with air/air moisture or condensate – the liquid being conveyed in conjunction with the materials used must be classifiable in temperature classes T1 to T3 and in explosion group II A or II B. For this type of liquid, the wall on the side of the product beeing conveyed must be resistant to permeation. • The feed pressure (in the inner pipe) must be at least 1 bar lower than the minimum alarm pressure. • The system must be earthed in accordance with applicable regulations8 • Tightness of the leak detection system should be ensured according to section 6.4.7. • The leak detection unit must be installed outside the potentially explosive-area. • Conduits for connecting lines must be sealed gas-tight. • The leak detector should be (electrically) connected in a way which cannot be switched off. 6.4. Functional tests Testing of the functional and operational safety and reliability should be performed • at every commissioning • in accordance with the intervals laid out in section 6.29 • whenever a fault is rectified. 6.4.1 Test scope (1) If necessary the work to be performed should be discussed with the person who is responsible on-site. (2) Observe the safety information on handling the products beeing conveyed. (3) Replacement or regeneration of the filter cartridge. 7 In Germany: by a trained specialist with expertise in the maintenance and servicing of leak detection devices, or under the responsibility of a trained and qualified individual in accordance with the applicable regulations. 8 In Germany: e.g. EN 1127, regulations of the EVUs 9 In Germany: legal regulations of the Länder also need to be satisfied (e.g. VAwS). 22/01/2009 - 9 - 12/38

DLR- P .. (4) Check the test valve at the end of the interstitial space away from the leak detector for tightness and check that it is free of dirt – clean as required. (5) Test for free passage of air through the interstitial space (section 6.4.2) (6) Test the switching values with a testing device (section 6.4.3). Alternatively: test the switching values without a testing device (section 6.4.3) (7) Check the overpressure valve (section 6.4.5) (8) Tightness test (section 6.4.6) (9) Set up the equipment ready for operation (section 6.4.7) (10) Completion of a test report by the qualified person, with confirmation of functional and operational safety and reliability. (11) Before starting work, we recommend performing the leak test of the system (which is integrated in the leak detector) as described in section 3.5.2, in order to gain an impression of the condition of the system. 6.4.2 Test for free passage of air through the interstitial space (see P-078 000) (1) If several interstitial spaces are connected then each interstitial space should be tested individually for free passage. (2) If several interstitial spaces are connected via a mainfold with a shut-off device then all of the shut-off valves of the manifold should be closed. (The pressure and measuring lines are combined underneath the leak detector). (3) Connect a gauge to the three-way cock 21 and set it to position “III”. (4) Open the shutoff device in the manifold of the interstitial space which is to be tested, then open the test valve at the end away from the leak detector. IMPORTANT NOTE: Maintenance work and functional tests must only be performed by qualified persons. (5) Observe any pressure loss on the measuring instrument. If no pressure loss takes place, locate and rectify the cause. (6) Close the test valve of the pipe and then close the shut-off valve opened in step (4). (7) Repeat steps (4) to (7) for every other pipe. (8) Set the three-way cock 21 to position "I" and disconnect the gauge. (9) Open all shut-off valves on the manifold with the pipe connected. 6.4.3 Test the switching values with a testing device (see P-115 395) (1) Connect a testing device to the free connection port on the three-way cocks 20 and 21 (insert hose clips). Set both cocks to position "II". (2) Connect the gauge to the test device. (3) Close the needle valve (testing device) – pressure is then built up on top of the operating pressure. (4) Vent via the needle valve, determine the switching values for "Pump ON" and "Alarm ON" (visual and audible), write the values down. 22/01/2009 - 10 - 13/38

DLR- P .. (5) Close the needle valve and determine the switching values for "Alarm OFF" and "Pump OFF", write the values down. (If necessary open the needle valve slightly so that there is a slow pressure increase.) (6) Set the three-way cocks 20 and 21 to position “I”. Disconnect the testing device. 6.4.4 Test the switching values without a testing device (see P-078 000) (1) If several pipes are connected via a manifold, close all of the shut-off valves on the manifold apart from the cock for the pipe with the smallest interstitial space volume. (2) Connect a gauge to the three-way cock 21 and set it to position “III”. (3) Vent via the three-way cock 20 (position “III”), determine the switching values for "Pump ON" and "Alarm ON" (with visual and acoustic alarms), write the values down. (4) Set the three-way cock 20 to position “I” and determine the switching values for "Alarm OFF" and "Pump OFF", write the values down. (5) Set the three-way cock 21 to position "I" and disconnect the gauge. (6) Open all shut-off valves on the manifold with the pipe connected. 6.4.5 Check the overpressure valve (see P-078 000) Operating pressure needs to be built up in the leak detection system before this test can be performed. (1) Three-way cock 21 to position “II” (pressure sensor is vented). The pump switches on and an alarm is triggered. (2) Press the “Audible alarm” button to silence the sound. (3) Connect a gauge to the three-way cock 20 and set it to position “II”. (4) Determine the opening pressure of the overpressure valve (no further pressure increase) and make a note of the value. If the opening pressure of the overpressure valve exceeds the test pressure of the interstitial space, replace or readjust it. (5) Set the three-way cock 21 to position “I”. The pump will switch off. Determine the closing pressure of the overpressure valve (no further drop in pressure – if the pump switches on first then the cause should be located and rectified), make a note of the value. (6) Set the three-way cock 20 to position "I" and disconnect the gauge. 6.4.6 Tightness test (see P-078 000) (1) Check that all shut-off valves with connected interstitial space are opened. (2) Connect a gauge to the three-way cock 21 and set it to position “III”. 22/01/2009 - 11 - 14/38

DLR- P .. (3) Start with the tightness test once the pressure has been equalised. The test is passed if the values in the table below are met. A greater drop in pressure means more stress on wearing parts. Interstitial space volume (litres) Max. pressure drop of 1 mbar (0.015 psi) after 250 22 minutes 500 45 minutes 1000 1.50 hours 1500 2.25 hours 2000 3.00 hours 2500 3.75 hours 3000 4.50 hours 3500 5.25 hours 4000 6.00 hours (4) Set the three-way cock 21 to position "I" and disconnect the gauge. 6.4.7 Set up the equipment ready for operation (1) Seal the housing. (2) The shut-off valves for all connected pipes must be set to their open position. 6.5. Alarm / fault (1) The red signal lamp comes on and an audible signal sounds. (2) Press the “Audible alarm” button to silence the audible signal. (3) Contact the installation company immediately. (4) Determine and rectify the cause for the alarm, then perform a functional test of the leak detection system as described in section 6.4. 7. Disassembly The following points are particularly important for the disassembly of plants and systems which could represent explosive hazards. • Applicable regulations for the disassembly of electrical systems must be followed. • Check that no gas (potentially explosive atmosphere) is present before and during the work. • Seal any openings gas-tight that could otherwise allow the spread of an explosive atmosphere. • Do not use electrical equipment capable of generating sparks (saw, cutting grinder...) for disassembly. If this is unavoidable, follow the instructions in EN 1127. • Use low-sparking tools. • Avoid any build-up of electrostatic charge (e.g. due to friction). • Contaminated components (potential outgassing) should be disposed of appropriately. 22/01/2009 - 12 - 15/38

DLR- P .. 8. Marking • Electrical data • Serial no. • Type designation • Date of manufacture (month / year) • Manufacturer’s code • Legally required symbols/marks • The connecting line(s) can be connected to areas for which category 3 devices (Group II (G)) are required (T1 to T3; IIA to IIB). 9. Abbreviations 01 Signal lamp – "Alarm" – red 02 Shut-off valve 09 Signal lamp - "Operation" - green 17 Overpressure pump 20 Three-way cock in the high-pressure line 21 Three-way cock in the measurement line 24.1 Fuse 22 Venting device 30 Housing 52 Gauge 57 Test valve 59 Relay 69 Buzzer 70 Overpressure valve 71 “Audible alarm” button 72 Dry filter 74 Connecting line 76 Main circuit board 84 Test container, 1-litre 85 Test connection port (gauge) 88 Double walled pipe / double walled fitting or combination of the two 99 Control shaft 102 Pressure sensor 105 Control unit 106 Contacts for serial data transfer 107 Pulsation damper 22/01/2009 - 13 - 16/38

Druckleitung Messleitung 17/38

DLR- P .. TD Technical data 1. Electrical data Rated input (without external signal) 230∼ V - 50 Hz - 150 W Switching contact load, terminals AS (5 and 6) 230∼ V - 50 Hz - 200 VA Switching contact load, potential-free contacts max: 230∼ V - 50 Hz - 3 A (terminals 11 and 12) min: 6 V / 10 mA External fuse for the leak detector max. 10 A Overvoltage category 2 2. Pneumatic data (requirements for the test measuring instrument) Rated size min. 100 Accuracy rating min. 1.6 Scale end value appropriate according to the operating pressure 06/04/2006 - TD-1 - 24/38

DLR- P .. TF Dry filters 1 Dry filters for underground pipes: TF 1 (the larger dry filters could however also be used) 2 Dry filters for overground pipes: Max. volume of the interstitial space with Type TF 1 TF 2 TF 6 DLR-P 1.1 400 1150 2600 DLR-P 1.5 DLR-P 2.0 300 800 1850 DLR-P 2.3 DLR-P 2.5 250 700 1600 DLR-P 3.0 230 600 1400 06/04/2006 - 1 - 25/38

DLR- P .. Evaluating the display for the function "Tightness test" Chapter 3.5.2 described "Checking the tightness of the monitored system". This function can be used to obtain an indication of the tightness of the monitored system. This is only possible if the switching value "Alarm OFF" has been exceeded. It can be repeated several times in succession. This check is advisable before carrying out a recurrent function test on a leak detector, to see directly whether there is any need to look for leaks. After pressing the button, this is confirmed by a brief audible signal which can be heard once, followed by a flashing signal, i.e. the Alarm LED flashes briefly to indicate the tightness as fol- lows: Number or flashes Evaluation of the tightness 0 Very tight 1 bis 3 Tight 4 bis 6 Sufficient tight 7 bis 8 Maintenace recommended 9 bis 10 Maintenace highly recommended The smaller the above value, the more tight is the system. The meaningfulness of this value naturally also depends on temperature fluctuations and should therefore be considered to be an indicative value. 04/11/2009 - 1 - 26/38

DLR- P .. Statement on the cross-sections of the connecting lines between leak detector DLR-P and the interstitial spaces In the past, the connecting lines between the interstitial spaces and the leak detector have been routed in accordance with TRbF 501 and 502 with the following dimensions: • for underground or frost-proof routing: clear width of at least 4 mm, • for overground routing or routing at risk of frost: clear width of at least 6 mm. In future, the European standard for leak detection systems EN 13160 will require • connecting lines carrying air to be routed with a clear width of at least 6 mm, and • connecting lines carrying nitrogen to be routed with a clear width of at least 4 mm. This requirement in relation to the routing of connecting lines will have take effect immediately and continue into the future. It already has an impact in terms of the approval of leak detectors. This is why a minimum diameter of 6 mm for the connecting line is required in the approval for the leak detector DLR- P.. . Installation of the connecting line with a clear width of 4 mm in accordance with TRbF is technically accepted and therefore not something which should be questioned at present. From a technical point of view, there are no objections to using a DLR-P leak detector on pipes with 4 mm frost-free connecting lines which are routed underground or inside between interstitial spaces and the leak detector. Siegen, 25.05.2004 J. Berg -Executive Board- 06/04/2006 - 1 - 27/38

To remove the cover To open the cover 170 230 6 B x H x T = 266 x 217 x 110 266 30 100 217 ~250 ~350 28/38

Pneumatic connections AB-820500.DOC 24. Jul. 03 Revision: 1.0 Page: 1 1 Flare type fitting for flare type pipes 1. Lubricate the O-rings 2. Place the intermediate ring loosely in the threaded connection piece 3. Push the union nut and the thrust collar over the pipe 4. Tighten the union nut manually 5. Tighten the union nut until clearly increased force is needed 6. Finished assembly: turn by a further ¼ of a revolution 2 Clamping ring threaded fitting for plastic and metal pipes 1. Insert the support sleeve into the end of the pipe 2. Insert the pipe with support sleeve as far as it will go 3. Tighten the thread until strong resistance can be clearly felt 4. Lightly loosen the nut 5. Tighten the nut until resistance can be felt (nut must exactly match the thread of the basic body) 3 Olive threaded fitting for plastic and metal pipes 1. Insert the reinforcing sleeve into the end of the pipe 2. Knock in the reinforcing sleeve 3. Push the union nut and the olive over the end of the pipe 4. Screw the union nut by hand until you feel a stop 5. Press the pipe against the stop in the inner cone 6. Tighten the union nut by approx. 1.5 revolutions (pipe must not turn) 7. Loosen the union nut: check whether the pipe visibly projects from under the cutting ring (it doesn’t matter if the clamping ring can be turned) 8. Retighten the union nut using normal force 4 Quick-action fitting for PA- and PUR-tubes 1. Make a right-angled cut in the PA pipe 2. Loosen the union nut and push it over the end of the pipe 3. Push the pipe onto the nipple up to where the thread begins 4. Tighten the union nut by hand 5. Further tighten the union nut using a wrench until clearly increased force is needed (approx. 1 to 2 revolutions) NOT suitable for PE-pipes 30/38

Pneumatic connections AB-820500.DOC 24. Jul. 03 Revision: 1.0 Page: 2 5 Tube connections (socket 4 and 6 mm for EXCESS PRESSURE) 1. Push wire or screw clip over the tube 2. Push the tube onto the Cu pipe or the tube socket (if necessary heat or dampen PVC tube), tube must fit tightly all the way round 3. Wire clip: clamp tightly using pliers and push onto the joint Screw clip: push the clip over the joint and tighten it using a screwdriver, care must be taken that the clip is a smooth tight fit. 6 Tube connections (socket 4 and 6 mm for VACUUM) For vacuum applications where there is no excess pressure on the connection lines even in the case of a leakage proceed as in item 5, but without clips. For vacuum applications where excess pressure could arise in the case of a leakage, proceed as in Item 5. 31/38

Statutory body 10829 Berlin, 31st March 2008 Kolonnenstraße 30 L Phone: 030 78730-364 Fax: 030 78730 – 320 Office: III 14 – 1.65.22-50/02 National Technical Approval [translation] Approval number: Z-65.26-349 Applicant: Sicherungsgerätebau GmbH Hofstraße 10 57076 Siegen Object of approval: Overpressure leak detector based on leak detector type DLR in designs DLR-G, DLR-P and DLR-GS for double walled pipes in systems for storage, filling and handling of water contaminating liquids. Expiry of approval: 31st March 2013 The above-specified object is hereby granted national technical approval certificate*. This national technical approval comprises six pages and a two-page annex. [stamp: German Institute for Construction Engineering] 32/38

II. PARTICULAR SPECIFICATIONS 1 Approved object and field of application 1.1 The object of this national technical approval are leak detectors based on the overpressure system of the DLR type code including the following models: - DLR-G with an alarm pressure of up to 9 bar or 18 bar for installation of either a temporarily installed (mobile) pressure tank (or compressed gas network) which may be used with air or inert gas as a leak detection medium. - DLR-P with an alarm pressure of 1.1 bar or 2.3 bar with internal pressure pump with air as a leak detection medium. - DLR-GS for maximum operating pressures up to 20 bar in the interstitial space for installation of a temporarily installed (mobile) pressure tank (or network) with air or inert gas as a leak detection medium. The leak detector comprises a pressure measurement sensor to control the alarm signal which is connected over a connecting line to the interstitial space, as well as electrical switching devices for visual or audible alarm signals from a device supplying compressed gas, with or without refill function, and measurement line installations. Leaks in the walls of the interstitial space are detected by dropping pressure and displayed visually and audible (see annex 1 for a model construction of the leak detector device). 1.2 The leak detector may be connected to the interstitial space of double walled pipes in systems for storage, filling and handling of water-contaminating liquids which are suitable for the set interstitial overpressure and for water-contaminating liquid according to a constructional use certificate (e.g. national technical approval). The leak detector models with an internal pressure pump or a permanently connected (stationary) storage tank or network for compressed gas may be connected either to underground or to aboveground pipes that have been installed either outdoors or indoors. Leak detector models with a temporarily connected (mobile) pressure tank (or network) may be installed to underground or aboveground pipes in rooms with temperature variations of +/-10ºC. The interstitial space volume of double walled pipes must not exceed 10 m³. 1.3 This general national technical approval only delivers proof of operational reliability of the approved object in the sense of section 1.1. 1.4 The national technical approval is issued subject to test- or authorization without prejudice to other legal areas (e.g. first decree from the Equipment Safety Act– Low Voltage Directive – Electromagnetic Compatibility Act (EMVG), eleventh decree from the Equipment Safety Act – explosion protection). 1.5 Neither the determination of suitability in alignment with laws relating to water nor qualification approval in accordance with § 19 h of the Water Ecology Act (WHG)1 apply to the approved object within this national technical approval. 1 German law on the management of water resources (Wasserhaushaltsgesetz – WHG) of 11th November 1996. 33/38

2. Construction product specifications 2.1 Composition 2.1.1 A leak in the walls of the interstitial space generates a pressure drop which is indicated visually and audible at an alarm switch point of ≥ 1.0 bar when exceeding the highest operating pressure of the pipe. 2.1.2 The leak detector is designed for a temperature ranging between -20°C and +60°C. 2.1.3 The approved object consists of a DLR type leak detector including the system components listed in section 1.1. 2.2 Manufacture and Labeling 2.2.1 Manufacture The leak detectors may only be manufactured in the applicant’s plants. They must correspond with respect to model, dimensions and materials presented in annex 2 of this national technical approval. 2.2.2 Labeling The leak detector, its packaging or its delivery note must be labelled by the manufacturer with the compliance symbol (Ü-marking) in accordance with the compliance symbol regulations of the Laender (ÜZVO). Labeling may only be carried out if the preconditions of section 2.3 have been fulfilled. In addition to this, the leak detector is to be supplied with the following requirements: - description of type - approval number 2.3 Compliance certificate 2.3.1 General Each manufacturing plant must confirm the compliance of the leak detector with the specifications contained within this national technical approval by means of a manufacturer’s declaration of compliance based on in-house production testing and an initial check of the leak detector by an inspection body recognized for this purpose. 2.3.2 In-house production testing An in-house production test is to be arranged and carried out at the manufacturer’s plant. A routine test of each leak detector is to be carried out within the framework of the production test. Through a routine test, the manufacturer is to guarantee that the materials, dimensions and fits as well as the design corresponds to the type model and that the leak detector operates reliably. The results of the in-house production tests are to be recorded and evaluated. The records must contain at least the following information: - Description of the leak detector - Type of test or check - Date of manufacture and leak detector test - Results of the tests or checks - Signature of those responsible for the in-house production test. The records are to be retained for at least 5 years. They are to be presented to the German Institute for Construction Engineering or to the highest construction supervisory authorities upon request. If the test results are unsatisfactory, the measures necessary for eliminating the deficiency are to be carried out immediately by the manufacturer. Any leak detector which does not correspond to the requirements is to be handled in such a way that there can be no confusion with respect to compliant objects of approval. After the deficiency has been eliminated, as far as is technically possible and upon proof of elimination of the deficiencies, the test in question is to be repeated immediately. 34/38

2.3.3 Initial testing of the leak detector by a recognized inspection body The operational tests cited in “Principles of Approval Procedures for Leak Detector Devices for Double Walled Pipes” (ZG-LAGR of August 1994) are to be carried out within the framework of the initial test. If the basic test certificates have been issued for the national technical approval on the basis of samples taken from the running production, these tests shall replace the initial test. 3 Design specifications 3.1 (1) It must be ensured at all times that the leak detector is sufficiently resistant tothe liquid to be stored and that no water-contaminating liquid reacts with the leak detection medium. (2) Models DLR-G, DLR-GS and DLR-P of the leak detector may be used on pipes to convey water-polluting liquids according to specifications in the Technical Description of the respective leak detector model. The use on pipes with or without permeation to convey water-polluting liquids with a flash point of ≤ 55°C may be effected for the operating methods inert gas or air with secured refill or without secured refill as they are listed in the Technical Description. Thereby taking into consideration the requirements placed according to Appendix B of DIN EN 13160-1 with regard to the device categories according to EN 1127-1. Secured refill according to Appendix B of DIN EN 13 160-1 with the leak detection medium (monitoring medium) air or inert gas is considered to be fulfilled if • the leak detector has an integrated pump, • the leak detector is connected to a continuously operated pressure air or pressure gas network appropriate for the operation of the leak detector, • residual pressure monitoring of the pressure tank with alarm indication is installed in case of operation with a continuously connected pressure tank (operating method S with stationery pressure air bottle). Leak detector models operated without continuously connected pressure air or pressure gas supply (e.g. operating method M with mobile pressure air bottle) are considered to be models without secured refill. 3.2 The required interstitial pressures for DLR-G and DLR-GS type leak detectors are adjusted by the manufacturer in compliance with the permissible operating overpressure values and the expected temperature variations in double walled pipes. If required, the specialist company may adjust the switch values retrospectively (on the construction site) in agreement with the manufacturer. The interstitial pressures of the DLR-P model have been adjusted by the manufacturer and shall remain unchanged. 3.3 The “alarm ON” switch value must be at least 1 bar higher than the maximum operating overpressure of the delivering pipe. 4 Installation specifications 4.1 (1) The DLR-G type leak detector must be installed in accordance with section 4 of the technical description2 and must be put into operation in accordance with sections 5 and 6 thereof. (2) The DLR-P type leak detector must be installed in accordance with section 4 of the technical description3 and must be put into operation in accordance with section 5 thereof. (3) The DLR-GS type leak detector must be installed in accordance with section 4 of the technical description4 and must be put into operation in accordance with section 5 thereof. 2 TÜV Nord e.V. approved technical description of DRL-G type leak detector, dated 26 Feb. 2002. 3 TÜV Nord e.V. approved technical description of GLR-P type leak detector, dated 21 Dez. 2005. 4 TÜV Nord e.V. approved technical description of DLR-GS type leak detector, dated 25 Apr. 2007. 35/38

(4) Only those companies which are specialist companies, according to § 19 1 Water Ecology Act (WHG), with respect to the installation, maintenance, repair and cleaning of the leak detector may be commissioned to carry out these tasks. (5) The tasks described in sub-sections (1), (2) and (3) need not be carried out by specialist companies if they are exempted from the specialist company obligation according to Laender legislation or if the manufacturer of the approved object carries out the tasks using its own specialist personnel. Health and safety regulations remain unaffected. 4.2 The leak detectors may be only installed in non-explosive areas. 4.3 The pressure supply unit to fill and refill air or inert gas to the interstitial space (with or without refill function during leak detector operation) must be equipped with a pressure reducer which serves to avoid that the maximum operating pressure of the leak detector and the permissible operating pressure of the interstitial space be exceeded. Should the adjustment range of the pressure reducing valve exceed any of such permitted operating pressure values, it must be ensured that the pressure-limiting valves comply with the permissible operating pressure values. 4.4 The connecting lines from the interstitial space to the pressure measurement sensor with an inside clearance of ≥4 mm for inert gas and ≥ 6 mm with dry air as a leak detection medium as well as the connection line to the interstitial space are to be designed for at least a permitted pressure which corresponds to the test pressure of the interstitial space. If the leak detector is connected to interstitial spaces of pipes with flowing inflammable liquids that have a flashpoint ≥ 55°C, solid connection lines are to be provided which correspond at least to pressure level PN 10. 5. Specification for use, maintenance and repeated testing 5.1 The leak detector must be maintained in accordance with the technical description of the respective leak detector model. The maintenance work and function tests may only be carried out by skilled personnel of a specialist company according to WHG or by the operator. The function and operating safety of the leak detector is to be tested at least once a year. 5.2 The technical description of the model being delivered is to be supplied by the manufacturer. Strasdas Authenticated [stamp: German Institute for Construction Engineering] 36/38

We, SGB Sicherungsgerätebau GmbH Hofstraße 10 D- 57076 Siegen hereby declare in sole responsibility that the leakage probes DL.., DLR-P.. comply with the essential requirements of the EC directives listed below. This declaration shall lose its validity if the device is modified without consulting us. Number / short title Satisfied regulations 2004/108/EC EMC Directive EN 61 000-6-3: 2007 EN 61 000-6-2: 2005 EN 61 000-3-2: 2006 EN 61 000-3-3: 1995 + A1: 2001 + A2: 2005 2006/95/EC Low Voltage Directive EN 60 335-1: 2007 EN 61 010-1: 2001 EN 60 730-1: 2005 89/106/EEC Construction Products Directive 93/68/EEC EN 13 160-1-2: Approved body: TÜV-Nord, Hamburg 94/9 EEC Equipment in Potentially Explosive Atmospheres The leak detector with its pneumatic parts may be connected to spaces (interstitial spaces of tanks / pipelines / fittings) which are required for category 3 devices. The following documents were used: EN 1127-1: 2007 EN 60 079-10: 2003 EN 13 160-1-2: 2003 EN 13463-1: 2001 The ignition hazard analysis did not result in any additional hazards. Compliance is declared by Martin Hücking (Technical Director) L:\ÜBERSETZUNGEN\DOKUMENTATIONEN\ENGLISCH\DL\15-1-Declaration DL..-DLR-P...DOC Last updated: January 2009 37/38

All of our leak detectors undergo a 100% quality control examination. The type plate with the serial number is only affixed after all test criteria have been complied with. The warranty period for our leak detectors is 24 months, beginning on the date of installation on site. The maximum warranty period is 27 months from our date of sale. Our warranty will be effective only if the customer submits to us the functional report or test report on initial putting into service, prepared by a recognised company specialised in water and water protection systems, including the serial number of the leak detector. Our warranty shall not apply in the event of faulty or improper installation or improper operation, or if modifications or repairs are carried out without the manufacturer's consent. In case of malfunction, please contact your local specialist company: Stamp of the specialist company Yours sincerely Sicherungsgerätebau GmbH Hofstraße 10 - D - 57076 Siegen � +49 / 271 / 48964 - 0 Fax: +49 / 271 / 48964 - 6 38/38