Deeter Leak Detector System
Contents
1. Deeter Leak Detector User Manual The DEETER Group Deeter Leak Detector Deeter Electronics Limited Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 1 of 11 Deeter Leak Detector User Manual Table of Contents 1 S CUMING yY sesuteceratecasastenarnidi Rea eeeawte 3 2 Leak Detect COME ON Oh foxciiecestccassoacsecedesasranssiesacainseconssoeasnsadeeessaxtorenieadexors 3 2 1 Controller Electrical Connections ee ceecee eee 4 22 LED Indicators ascicsia cxtcvsveanssyicecastvieascisacuiuavdvinbnciissecaieneeauieunnaties 6 2 3 eld e gape 80 9 ESen 6 3 Leak SENSOLS ee nee eC a e E S 8 Specifications sisssrsesroisto dsi eese morenn aaaea a a a A R Ea aE eiaa 11 Deeter Electronics Limited Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 2 of 11 Deeter Leak Detector User Manual 1 Summary The Deeter Leak Detector comprises a Leak Detect Controller and a set of Leak Sensors The Controller will respond to a leak detected at any one of the Sensors The Controller provides an LED indication of the system status and has relays and a transistor output that may be used to directly drive pumps and alarms or may be used to interface to other equipment such as Programmable Logic Controllers PLC Building Management Systems BMS and dial up alarms systems The Controller has a wide range of power supply options with separate in2. HP14 4LW Page 11 of 11
3. S or it can be connected to the Leak Sensor input of another Leak Controller to provide additional relay contacts The relays have a current rating of 6A at 250VAC Deeter Electronics Limited Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 5 of 11 Deeter Leak Detector User Manual 2 2 LED Indicators There are three LED indicators on the top panel green yellow and red These show the current state of the Leak Detect Controller as follows Operating State Green Yellow Red System okay no leak or line fault On Leak detected On Leak latched leak has passed Flashing Fault detected On Leak latched and fault detected On Flashing 2 3 Option Switches There are six DIP switches on the top panel used to select a range of options To gain access to the switches prise off the top panel using a flat bladed screwdriver in the gap to the left or right hand side of the cover The switches have the following functions Switch No OFF down ON up 1 Relay 2 Assigned to Leak Assigned to Fault 2 Alarm Assigned to Leak Assigned to Fault 3 Relay 1 Follows Latches 4 Relay 2 Follows Latches 5 Alarm Follows Latches 6 Relay1 amp 2 default Off On Relay 1 is always assigned to leak detection Deeter Electronics Limited Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 6 of 11 Deeter Leak Detector User Manual If there is a fault detected on
4. puts for mains voltage supplies 220 240VAC and low voltage supplies Low voltage supplies can range between 8 24V AC and 10 32V DC A number of user selectable options are provided by a bank of 6 switches behind the Controller front panel These are visible through the front panel but only accessible with the panel removed so cannot accidentally be changed 2 Leak Detect Controller The Leak Detect Controller is housed in a UL94 VO flame retardant case that will fit to standard 35mm DIN rail Deeter Electronics Limited Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 3 of 11 Deeter Leak Detector User Manual 2 1 Controller Electrical Connections All electrical connections are made via two rows of screw terminals as shown in the following table Terminal No left to right 1 2 3 Top Row Ou ps 4 4 f be i 1 f OOO SE000EOO00 pete ey i j l i j t i i i i i i i i i i i i i Function Leak Sensor supply output ve Leak Sensor input Leak Sensor supply output ve OV Alarm output open collector transistor Unregulated output Power supply input ve Power supply input ve reece Vamanionsamd t i t The top row 5mm spacing has terminals grouped in twos and threes according to function and are used for low voltage connections only less than 50V Deeter Electronics Limited Deete
5. r House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 4 of 11 Deeter Leak Detector User Manual Bottom Terminal No Function Row left to right Mains supply Live 230VAC Mains supply Neutral Relay 2 NO normally open contact Relay 2 COM common contact Relay 2 NC normally closed contact Relay 1 NO Relay 1 COM Relay 1 NC ONOUBWNE The bottom row 7 5mm spacing may be used for connecting mains supply voltages 220V 240V or low voltages if the Controller is not powered by mains Mixing mains and low voltages on the bottom row of terminals is not recommended for electrical safety reasons There are two pairs of power supply terminals a low voltage pair on the top row and a mains voltage pair on the bottom row Connect to one pair only The low voltage pair will accept AC voltages from 8V to 24V or DC voltages between 10V and 32V The unregulated output is a DC voltage derived from the supply AC DC or mains and the voltage level will depend on the supply and load It may be used to power external devices with return current via the OV or Alarm terminals The open collector transistor Alarm output is current limited to sink up to 50mA and can be pulled up to 40V It is open during normal operation and can be used in conjunction with the unregulated supply output to drive an external relay It may also be used to interface to other equipment such as a PLC or BM
6. t come on when a leak is detected but remain off if the detector system is switched off Use the NO contacts and set Switch 6 so that relays default to Off Example 2 A siren must sound if a leak is detected or if the detector system is switched off Use the NC contacts and set Switch 6 so that relays default to On Isolation of both supply lines may be a requirement for some mains powered equipment The two single pole relays can be used as a double pole relay if they are both assigned to leaks and both set to latch or follow in the same manner Deeter Electronics Limited Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 7 of 11 Deeter Leak Detector User Manual 3 Leak Sensors Leak Sensors are housed in ABS enclosures with a pair of stainless steel sensing probes protruding through the underside The probes will detect normal water to a depth of around 1 to 2mm They will detect other conducting fluids or purer water but may require greater depth of contact with the fluid To achieve greater contact or to enable the probes to reach further they can be extended using an M3 threaded spacer Sensors are linked using a 3 wire cable in a daisy chain configuration Screw terminals are provided for connections from the Controller or previous Sensor in the chain and out to the next Sensor in the chain The last Sensor in the chain must terminate the wires so that if a wire becomes broken
7. the Controller can detect the break and report a fault py Deeter Electronics Limited Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 8 of 11 Deeter Leak Detector User Manual Sensor with lid removed showing line terminating connections Screw terminals must be kept dry so cables are fed through cable glands and the box lid can be sealed to IP65 Remove the lid to reveal the screw terminals which have the following functions 6 way Terminal No Terminal 1 is opposite terminal 1 on the 3 way connector 1 2 Anu BW 3 way Terminal No Terminal 1 is close to the side of the enclosure 1 2 3 Function Power supply ve Common sensor output Line termination connect to 4 Power supply ve Line termination connect to 2 Line termination connect to 6 Line termination connect to 5 Function Power supply ve Common sensor output Power supply ve The line termination connections are for the final Leak Sensor in the chain Remember to seal the unused cable gland on the final Sensor Deeter Electronics Limited Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 9 of 11 Deeter Leak Detector User Manual Sensors have two mounting holes that can be used to bolt them to the floor if required The mounting holes are accessible with the lid removed Please note that although a break in the wires connecting
8. the Leak Sensor line Relay 2 and or the Alarm output can be used to indicate the fault Fault conditions include e A break on any of the three Leak Sensor wires e Poor termination of the Leak Sensor wires e Blown output fuse The Alarm output and both relays can be set to follow a leak condition or to latch If following the output will change back when conditions are dry If latching the outputs will remain on even after a leak has been cleared Pressing the Reset button on the top panel will unlatch the outputs and return the Controller to its quiescent state Fault outputs are not latched and always return to normal once the fault condition has been cleared If an output is assigned to fault and also selected to latch the red indicator will flash after a leak has cleared In this configuration although there may not be any latched outputs a temporary leak event can be indicated until the operator presses the reset button The relays can be configured to connect power or remove power to equipment when a leak or fault is detected by using either the NC or NO contacts Switch 6 allows this choice to be based on fail safe conditions With no power to the Controller the NO contacts will be open and the NC contacts will be connected to COM The fail safe configuration should be based on this condition and the choice of whether the relays should default to on or off will then depend on the type of equipment attached Examplel A pump mus
9. the sensors will be detected automatically in the unlikely event of a sensor failure there will be no indication of a fault All Leak Sensors should therefore be tested periodically to confirm that they are functioning correctly by placing the probes in the fluid they are required to detect Deeter Electronics Limited Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire HP14 4LW Page 10 of 11 Deeter Leak Detector User Manual Specifications Controller dimensions Sensor dimensions Sensor probes Mains power supply option Low voltage supply option Relay contacts Alarm transistor output resistive loads Maximum number of Sensors Maximum cable length Mains supply fuse Low voltage supply fuse Sensor output fuse Unregulated output fuse Deeter Electronics Limited 90mm high x 71mm wide x 58mm deep 35mm DIN rail mounting 100mm including cable glands x 64mm x 40mm high Pair 5mm long stainless steel M3 thread spaced at 20mm centres 220VAC 240VAC at 20mA 10VDC 32VDC at 200mA 8VAC 24VAC at 200mA 6A at 250VAC Current limited to maximum 50mA Maximum pull up voltage 40VDC 25 typically 2000m depending on wire resistance 32mA anti surge 5x20mm cartridge 500mA anti surge Omni Blok cartridge 375mA anti surge Omni Blok cartridge 100mA anti surge Omni Blok cartridge Deeter House Valley Road Hughenden Valley High Wycombe Buckinghamshire
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