Axio AX-WLDF User manual

Issue 1.3 (28/07/20) Page 1 of 3
Water Leak Detector - Four Zone with open/short-circuit detection
© Copyright Annicom
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-C 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.
Product Overview
●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
Features
●LED indication of each zone alarm
●Input sensitivity adjustable for each zone
●Relay output to BMS or Alarm annunciator
●Analogue output provides zone status indication
Product Specifications
Supply Voltage: WLDF-24 24Vac @ 50Hz ±10% and 24Vdc ±10% at 150mA max.
WLDF-230 230Vac @ 50Hz ±15%
Common Alarm Relay: SPCO rated 10A @ 250Vac resistive. NO Contact closed when OK
Individual Alarm Relays: SPNO rated 5A @ 250Vac resistive. Contact closed when OK
Sensor Inputs / Types: Cable or Point (Polarity independent)
Cable Length per Input: 200m (including header cable) maximum
Analogue Output: 0-10V at 5mA maximum
Sensor LEDs: 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)
Alarm LED: Red when fault detected
Audible Alarm Output: 70db @ 10cm
Mute input: Volt free contact (switching 5V at 1mA)
Electrical Connections: Rising cage terminals for 0.5-1.5mm² cable
Dimensions / Weight: 156 x 85 x 60mm / 155gms
Ambient Temperature Range: -10 to +50˚C,090%RHcondensing
Country of Origin: United Kingdom
Order Codes
AX-WLDF-24 Four zone water leak detection module 24V
AX-WLDF-230 Four zone water leak detection module 230Vac
Compatible Sensors Refer to AX-WLDF-C and AX-WLDF-P datasheets

© Copyright Annicom. All Rights Reserved
Water Leak Detector - Four Zone with open/short-circuit detection
Page 2 of 3
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.
Installation
Connections
Channel 4 Alarm
VFC
General Alarm
Common NO NC
Alarm LED
Neutral
Live
AX-WLDF-230 only
230Vac
AX-WLDF-24
only
2 3
0-10V Out
Mute VFC Input 0V
0V Supply
24V Supply
Channel 4
Channel 3
Channel 2
Input Input
Sensitivity adjustment
Indicator LED
Channel 1
31 33 342827 30 36 37 39 40 41 51 52
7 8 12 13 17 18 22 23
Input Input
Sensitivity adjustment
Indicator LED
Input Input
Sensitivity adjustment
Indicator LED
Input Input
Sensitivity adjustment
Indicator LED
24 25 26
Channel 3 Alarm
VFC
Channel 2 Alarm
VFC
Channel 1 Alarm
VFC
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.
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.
Operation

© Copyright Annicom. All Rights Reserved
Water Leak Detector - Four Zone with open/short-circuit detection
Page 3 of 3
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
ALARM OK OK OK 9.33V
OK ALARM OK OK 8.67V
ALARM ALARM OK OK 8.00V
OK OK ALARM OK 7.33V
ALARM OK ALARM OK 6.67V
OK ALARM ALARM OK 6.00V
ALARM ALARM ALARM OK 5.33V
OK OK OK ALARM 4.67V
ALARM OK OK ALARM 4.00V
OK ALARM OK ALARM 3.33V
ALARM ALARM OK ALARM 2.67V
OK OK ALARM ALARM 2.00V
ALARM OK ALARM ALARM 1.33V
OK ALARM ALARM ALARM 0.67V
ALARM ALARM ALARM ALARM 0V