Water Leak Detector - Four Zone with open/short-circuit detection Product overview The AX-WLDF is a four zone water leak detection module with open or short circuit sensor cable detection. The module must be used with one of the AX-WLDF-Cx or AX-WLDF-P range of sensor types. The AX-WLDF can have a total of 200m of cable connected to each input. Relay outputs provide alarm signals for each individual zone, together with a combined alarm relay. A multiplexed analogue 0-10V output signal indicates zone status. The input sensitivity of each zone is adjustable to ensure false returns are not given. A total of 200m cable on each zone Detects open or short circuit sensors Mixed sensor types can be used Audible alarm with mute contacts LED indication of each zone alarm sensitivity adjustable for each zone Relay output to BMS or Alarm annunciator Analogue output provides zone status indication Supply Voltage: WLDF-24 24Vac @ 50Hz ±10% and 24Vdc ±10% at 150mA max. Common Alarm Relay: Individual Alarm Relays: Sensor s / Types: Cable Length per : Analogue Output: Sensor LEDs: Alarm LED: Audible Alarm Output: Mute input: Electrical Connections: Dimensions / Weight: Ambient Temperature Range: AX-WLDF-24 WLDF-230 230Vac @ 50Hz ±15% SPCO rated 10A @ 250Vac resistive. NO Contact closed when OK SPNO rated 5A @ 250Vac resistive. Contact closed when OK Cable or Point (Polarity independent) 200m (including header cable) maximum 0-10V at 5mA maximum 1 for each zone. Solid green = OK Flashing green = zone disabled (pot adjusted fully-anticlockwise) Solid red = water detected Flashing red = fault detected (open or short circuit) Red when fault detected 70db @ 10cm Volt free contact (switching 5V at 1mA) Rising cage terminals for 0.5-2.5mm² cable 82 x 45 x 47mm / 155gms -10 to +50 C, 0 90% RH condensing Four zone water leak detection module 24V AX-WLDF-230 Four zone water leak detection module 230Vac Compatible Sensors Refer to pages 4 and 5 Issue 1.0 (16/08/16) Page 1 of 5
SAFETY NOTE Ensure all installations are in compliance with applicable electrical codes and that the installation is carried out by qualified installers familiar with the relevant standards and proper safety procedures for high voltage installations. Never rely on status indication on any device to determine if power is present. Mounting The AX-WLDF clips easily on to standard DIN Rail. If it is necessary remove the module from the DIN rail, ensure to use a flat bladed screwdriver to release the DIN clip. Connections AX-WLDF-230 only Live 230Vac Neutral Alarm LED Common General Alarm NO NC Channel 4 Alarm VFC Channel 3 Alarm VFC Channel 2 Alarm VFC Channel 1 Alarm VFC 26 25 24 23 22 21 20 19 18 17 16 15 14 1 2 3 4 5 6 7 8 9 10 11 12 13 24V Supply 0V Supply AX-WLDF-24 only 0V Mute VFC 0-10V Out Channel 4 Channel 3 Channel 2 Channel 1 The relays are shown in the power-off condition. When power is applied, and zones are fault free (or disabled), then the relays will be in the opposite state. Operation Disable zone To disable a zone turn the relevant sensitivity preset fully anticlockwise. The zone LED will flash green every two seconds. The zone alarm relay will remain in the OK state and the 0-10V output will show the zones as OK. Page 2 of 5
Sensitivity Within 30 seconds of applying power to the AX-WLDF, with the cable connected, adjust the sensitivity potentiometers on each input by turning clockwise (increasing sensitivity) until the zone LED illuminates red, and then anti-clockwise (reducing sensitivity) until the zone LED goes off. Less sensitivity may be needed when long runs of cable are used. If the input is not used it should be disabled, see Disable zone. Testing To test the installation, after the sensitivity has been set, put a wet cloth over the cable to simulate a water leak, the indicator zone LED will illuminate solid red. Remove the cloth, short across the mute input, and if the cable is dry the zone LED will be solid green. Audible alarm output If the unit is in alarm and there is no mute switch in use, the alarm can be silenced by shorting across the mute terminals. If the audible alarm is not required the mute terminals can be permanently shorted. Alarm relay outputs and alarm LED Only when the fault is removed and the mute contacts closed will the alarm relay contacts return to normal, and the Alarm LED extinguish. Cable fault The unit monitors the cable for open and short circuit conditions. Only 1 cable or sensor should be connected to each zone input. Connecting two cables or sensor to one zone input will interfere with the cable fault detection and unit sensitivity. When a fault is detected the the Zone relay and General relay will go into the alarm state, the 0-10V will show an alarm for the zone and the zone LED will flash red. Analogue 0-10V output: The table below indicates the output voltage for each fault condition (Alarm = water detected, open circuit or short circuit) (OK = No alarm or input disabled): Channel 1 Channel 2 Channel 3 Channel 4 Analogue Output OK OK OK OK 10.00V OK OK OK ALARM 9.33V OK OK ALARM OK 8.67V OK OK ALARM ALARM 8.00V OK ALARM OK OK 7.33V OK ALARM OK ALARM 6.67V OK ALARM ALARM OK 6.00V OK ALARM ALARM ALARM 5.33V ALARM OK OK OK 4.67V ALARM OK OK ALARM 4.00V ALARM OK ALARM OK 3.33V ALARM OK ALARM ALARM 2.67V ALARM ALARM OK OK 2.00V ALARM ALARM OK ALARM 1.33V ALARM ALARM ALARM OK 0.67V ALARM ALARM ALARM ALARM 0V Page 3 of 5
Technical overview The AX-WLDF-Cx range of cable sensors are typically used to detect water leaks usually under floors, and are used in conjunction with the AX-WLDF range of detection modules. The cable excitation used from the AX-WLDF is an isolated AC signal which ensures the detectors will not be subject to oxidation or erosion over time, avoiding the degradation problems associated with DC systems. This cable sensor must only be used with the AX-WLDF range of modules, in order to detect open and short circuit conditions. Easy to Lay Detects Closed and Open Circuits Detects water along length of sensor Will not oxidise or erode as with DC Systems PVC Twisted pair with stainless 316 elements Response Time: Typically <1 sec after exposure Dimension: 3.5mm diameter Maximum Cable Run: 200m (including header cable) 1. Fit cable sensors to the floor, using suitable fixings 2. Connect the 2-core leader cables to the AX-WLDF alarm module (polarity independent). 3. Power the AX-WLDF, and adjust the relevant potentiometers on the module clockwise until the relevant red LED illuminates, and then anti-clockwise until the LED extinguishes. 4. Test the cables by placing a damp cloth over each of the cables to simulate a water leak, the relevant red LED will illuminate. Remove the cloth, short across the mute input, and if the cable is dry the red LED will extinguish. AX-WLDF-C2 Water Cable Sensor Premium for AX-WLDF, 2m cable & 1m leader cable AX-WLDF-C5 Water Cable Sensor Premium for AX-WLDF, 5m cable & 3m leader cable AX-WLDF-C10 Water Cable Sensor Premium for AX-WLDF, 10m cable & 3m leader cable AX-WLDF-C15 Water Cable Sensor Premium for AX-WLDF, 15m cable & 3m leader cable AX-WLDF-C20 Water Cable Sensor Premium for AX-WLDF, 20m cable & 3m leader cable AX-WLDF-Cxx Customer spec Water Cable Sensor Premium for AX-WLDF, Specify cable & leader cable Page 4 of 5
Technical overview The AX-WLDF-P water leak point sensor is used to detect water at a localised point. It is perfect for use with drip trays for alarm indication when the level reaches a pre-determined height. The unit can detect open and closed circuit along the length of the cable, and can even be cut to a desired length without issue. Additional features include a robust housing with slotted lugs for easy mounting, stainless steel probes and IP65 protected internals for impressive durability. Slotted lugs for easy installation Detects open / closed circuit along the entire length Cable can be cut to suit application. Robust housing 2m and 5m variants IP65 protection Housing Cable Length: Dimensions: Protection: Probes: Dimensions: Black ABS 2m 67 x 35 x 20mm (mounting slots 3.5mm wide on 57.8mm centres) IP65 Stainless Steel 13mm x 3mm diameter 1. Fix the AX-WLDF-P in the location where water detection is required. 2. The AX-WLDF-P is fitted with a 2m leader cable that can be terminated at a junction box. This can then be lengthened to a maximum of 200m to the AX-WLDF alarm module. 3. Connect the 2-core leader cable to the relevant sensor input on the alarm module (polarity independent). 4. Power the AX-WLDF, and adjust the relevant potentiometer on the module clockwise until the relevant red LED illuminates, and then anti-clockwise until the LED extinguishes 5. Test the sensor by placing a damp cloth over the stainless steel probes to simulate a water leak, the relevant red LED will illuminate. Remove the cloth, short across the mute input, and if the cable is dry the red LED will extinguish. AX-WLDF-P2 AX-WLDF-P5 Water Point Sensor Premium & 2m Cable Water Point Sensor Premium & 5m Cable Page 5 of 5