Under BREEAM "One Credit is awarded where a Water Leak Detection System is specified or installed. The system must be
capable of identifying major leaks both inside and outside the building, and should cover all mains supplies to the building …
within the building and between the building and the site boundary."
Therefore, BREEAM requires two specific monitoring systems; the first to monitor the external supply between the boundary and
the stop-cock in the building; and the second fitted just after the stop-cock to monitor for leaks within the building. As the WG2
system uses a pulsed Water Meter, it qualifies for an additional credit under the Water Meter section of BREEAM.
The Aqualeak BREEAM Criteria Water Leak Detection
System is comprised of three primary items: the
Aqualeak WG Control Unit, the WaterGuard Module and
the remote pulsed turbine Water Meter.
To monitor the external pipework, the module to
monitor the external pipes is linked to a Turbine Water
Meter at the site boundary. The module to monitor
internal water supply is connected to a water meter just
inside the stopcock. The Controller should be wall
mounted adjacent to the stop-cock in the building and
will require linking by a 1mm sq copper 3 core signal
cable to the Turbine Water Meter in the external pit.
Cabling runs should not exceed 100m.
The Turbine Water Meter has BSP male threads at each
end. The Controller requires mains power supply, and
allowance must be made for cabling between the
Controller and Turbine Meter.
As the BREEAM Criteria does not require water shut-off,
no solenoid valve is provided with the system as
standard. However if a valve was fitted-and can be
ordered from us-the system can then either turn off the
water completely at a specified time or can be set to
switch off if a pre set flow volume is exceeded.
The Turbine Water Meter provides a pulse to the
controller at 10L increments. The minimum setting that
can stimulate an alarm, or turn the water off, is one
pulse, i.e. after 10L of water has flowed, the system
alarms/shuts the valve. This is adjustable upwards
using the controller in increments of 1 pulse (10L). If the controller detects excessive flow, the Controller can alarm audibly and/
or visually. The no-volt output relays activate simultaneously, and can send a signal to external remote repeat alarms, or a BMS
System or to an Automatic Telephone Dialling system. This is the signal which would operate the solenoid shut off valve if
required.
Under normal operating conditions the WG Controller shows two green lights: ‘System is Live’ and ‘System is Clear’. When a water
leak is detected, red LED on the Module flashes “Water Detected”. Simultaneously the two Alarm Change-over Relays activate
providing onward alarm signalling. Pressing the ‘Water On’ button on the module facia will silence the alarm and will return the
system to normal. If it is required that the ‘alarm state’ remains latched, pressing the Mute Alarm on the WG Controller instead
will silence the alarm but will leave the alarm latched. When required, pressing the ‘Water On’ button on the WaterGuard facia will
return the system to normal operation.
The WG Controller is provided with four wall mounting holes adjacent to the corner cover screws, no drilling of the cabinet
is required. The only connections required to the WG Controller are Mains Power, a link to the Water Meter, and any output
alarms. Mains Power Connections are made to the WG Control Unit and should be made to the terminals on the PCB marked
MAINS L (Live) E (Earth) and N (Neutral). 'Live' is fused with a 20mm 2amp ‘power’ fuse. The ‘24 V AC Control’ fuse is also
20mm and is rated at 1 amp. Connections to the Turbine Water Meter (and to any valve if fitted) would be to remote terminals
marked F C V. For connection to the Water Meter, only terminals C and F are used. These terminals are not polarity conscious.
If a valve is fitted, connections to the valve are to terminals C and V. Any Solenoid Valves required will be latching 5VDC, from
Aqualeak.
Remote output alarms should be connected to the WG Controller PCB Terminals marked ALARM. Both sets of Terminals are rated
240v AC 6amp, and provide (left to right) Normally Open, Common, or Normally Closed contacts. A RESET Relay rated 240V AC
2amp is provided which can be used by the BMS to ‘time/date stamp’ when the mute button had been pressed to indicate when
the alarm was acted upon, or to mute an external remote sounder. Please do not adjust the pot on the PCB marked SENSITIVITY.
BREEAM CRITERIA WATER LEAK DETECTION SYSTEM - INSTALLATION AND OPERATING MANUAL
WG1 Control Unit
Turbine Water Meter
WG1
Module
Meter Connection Terminals
Mains Power Terminals
Please refer to
separate sheet for
connections if the
unit is fitted with a
Pulse Splitter
www.aqualeak.com 1 Silver Street, Gastard, Corsham, Wilts SN13 9PY T: 01249 715698 F: 01249 431 363
Dimensions LxHxW: 20x8x15 cm
