CMR Electrical DMWD Installation And Operation Manual

CMR Electrical Ltd
BoltonHouse
Five Chimneys Lane
Hadlow Down
East Sussex
TN22 4DX
Tel: [phone]

DMWD

1 to 4 Zone Water Detection

Alarm with Distance to Leak

Measurement

Installation and Operation

Manual

2

Contents

1) Display and Control

2) Operation

3) Water leak detected Alarm Test

4) Water Detected Alarm

5) Sensor Fault

6) Water Detection Sensitivity Adjustment

7) Installation

8) Positioning the water detection cable

9) Fitting Cable clips

10) Water Shutdown Valve

11) Water Shutdown Valve Override Procedure

12) Beacon and beacon sounder

13) Fitting the battery backup

14) Commissioning

15) Fault Diagnosis

16) Installation Drawing

17) Housing Size

3

1) Display and Control

Display Screens

a) All detection cables are connected correctly and a water leak has not detected

b) The detection cable has been disconnected, unplugged, damaged or cut

Zone Status

Display

Mute Alarm Push

Button

Valve Shutdown

Override &

Display Cable

Length Button

Zone Sensitivity

Adjustment see

Item 6 below

Removable Terminal Block

for connection to the water

detection cable or sensor

4

c) When the display is rotating between the above two windows, water has been detected and the unit is

calculating the distance to the leak

d) After (c) above, the display will change to show the distance to the leak from the start of the water

detection cable.

e) A leak has been detected but the zone is either not set for a distance reading, was unable to calculate

the cable length on power up due to water or contaminants in the cable, or encountered a problem in
determining the distance to the leak.

2) Operation

In normal operation with no alarms or faults, the audible warning device will be OFF and the display will
be showing “The System has no Alarms or Faults”. If one or more of the zones has a disconnected or
damaged cable, the audible warning device will sound and the display will show “ Zone (1-2-3-4)
Damaged or Disconnected Cable”. If the detection cable detects water, the audible warning device will
sound and the display will alternate between “WATER LEAK DETECTED ZONE (1-2-3-4) Please
Wait” and “WATER LEAK DETECTED Distance Coming Soon” until the final display window showing
the distance to the leak “WATER LEAK DETECTED ZONE (1-2-3-4) At 8 Metres”. The display
window “WATER LEAK DETECTED AT ZONE (1-2-3-4) will be displayed on powering up if the
system cant determine the total detection cable length due to water or contaminants touching the cable.
This window will also be displayed if the system cant determine the distance to the leak or the zone is not
set for distance measurement. If water shutoff valves are fitted, if a zone detects water, the appropriate
valve will close and the associated internal “Closed” lamp will illuminate. The system will automatically
open the valve allowing water to flow once the zone stops detecting water. This shutdown can be
overridden, See Item 11 below .

The length of the water detection cable can be checked providing the system has no alarms or faults as
shown in screen (a) on page 3. To check the cable lengths press the “Override / View” push button. Each
cable length will be displayed one at a time.

If the system has multiple alarms, the screen will automatically scroll between each alarm one after the
other providing the current alarm has been muted. This scrolling can be stopped at any time by
continually pressing the “Mute” push button. If multiple alarms occur at the same time, each alarm will
need acknowledging by the press of the “Mute” button. i.e. zones 1 & 2 go into water detected alarm at

5

the same time, the audible warning will be going with “Zone 1 water detected” on display. Pressing
“Mute” will stop the audible warning but it will immediately start again only this time the display will be
showing “Zone 2 water detected”. This second alarm will also need the “mute” button operated to silence
the audible warning. For ease of installation and fault diagnoses both individual zone “Alarm” and “Fault
lamps have been provided internally on the top PCB.

3) Water leak detected Alarm Test

To test that the unit is functioning correctly, pressing the red “Test Zone” button to put the system into a
Water detected alarm. Using the test facility will operate the alarm relays generating a BMS alarm, and if
fitted activate of the remote beacon/sounder and close the water shutoff valve. The resulting screen can be
either (d) or (e) as shown on page 3. The displayed distance if any will be fictional.

4) Water Detected Alarm

When the detection cable comes into contact with water anywhere along its length, the audible warning
device will start, the common alarm and if fitted, the zone alarm relay will close and the display will show
the zone number and distance to the leak from the start of the detection cable. To stop the audible warning
press the “Mute Alarm” button. The system will remain in this state until the water has been removed
from the cable when the alarm relay will automatically turn OFF.

5) Sensor Fault

Because of the exposure of the detection cable on the floor, the system monitors for any breaks in the
detection cable including the interconnection cable between the control unit and the detection cable. If a
break within the cable is found, the audible warning device will start, the fault relay will operate and the
display will show the zone number. To stop the audible warning press the “Mute Alarm” push button. The
system will remain in this state until the sensor fault is repaired when the display and common fault relay
will revert back to normal. If the controller detects a break in the cable, the system will continue to detect
water up to the point of the break.

6) Water Detection Sensitivity Adjustment

To increase the sensitivity of the cable turn the potentiometer ANTICLOCKWISE, to de-crease the
sensitivity turn CLOCKWISE.

The sensitivity adjustment is provided to allow the point at which the system goes into alarm to be
adjusted. Once the system is in alarm the cable will need to be dry before any reset. It is recommended
that the sensitivity be set so that the arrow on the white plastic circle as shown above is pointing at the
3:00 clock position

Increase Sensitivity Decrease Sensitivity