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Installation & Operation Manual
LED Indicator Status
Power
Power LED will illuminate RED when power is supplied. When no power is present, this LED will not light up.
Water On
On start up, if no water leak or any other alarms are detected, the water valve will open and the Water On LED will
illuminate. GREEN = Water Supply On OFF = Water Supply Off
General Alarm
If an external alarm is triggered, the LED will illuminate AMBER and the water supply will be turned off. The error
condition must be re-set before restarting the system.
Zones 1-2
Under normal working conditions this LED is GREEN. If the Water Leak Monitor connected detects a fault with the
water leak rope, this will show AMBER. If the Water Leak Monitor connected detects a water leak this will show RED
and the water solenoid valve will close.
Mute & Reset Buttons
MUTE The mute button is located on the front fascia of the WLMZ4 and is used to mute the sounder inside the
board when in alarm. The internal buzzer operates at approximately >60db measured 30cm (1ft) from a closed
panel.
RESET The reset button is located on the front fascia of the WLMZ4 and is used to turn the system on and to reset
the system following alarm.
Specification
General
Product:
Use:
Indicators
Mounting
Electrical
Max. Power Consumption
Power Voltage Input Range
Water Valve Output Range
I/Os
BMS
Terminal Wire ratings
Fuse
Construction
Dimensions (H x W x D)
Unit Weight (Approx.)
Housing Material
Environmental
Ingress Protection
Storage Conditions
Operating Conditions
Compliance
CE / UKCA
Rev: 2 02-24
WLMZ4 Water Detection Controller
Indoor, Safe Areas (not to be used in potentially explosive atmospheres)
LED
Wall Mounting
20W Max (Full Load)
100-240vac
100-240vac
24vdc Outputs (WLM / Strobe or Sounder)
General Alarm Open/Close input
Volt Free (Normally Closed / Common / Normally Open) 3A Max
Copper 18AWG (0.75mm2) Min. x29 screw terminals.
3.15A
140 x 190 x 62mm (5.51 x 7.48 x 2.44")
0.7kg / 24.7oz
Polylac - PA765
IP65 (Pre-installation)
Dry. Cool. Flat
-10 ~ 50°C / 14 ~ 122°F 30 ~ 80% rf
EN 61326-1 / BS EN IEC 61010-1
Merlin WLDZ4
7
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