CMR Electrical CWT2-2 User's Installation And Operation Manual

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

Water Leak and Room Over

Temperature Alarm

Installation and Operation

Manual

2

Contents

1) Display and Control

2) Operation

3) Display Screens

4) Water detection Sensor wiring

5) Temperature Sensor wiring

6) Setting the alarm trip set point

7) Positioning the temperature sensor

8) Power, BMS, beacon and SMS connections

9) Beacon and beacon sounder

10) Fitting an SMS / Email messaging system

11) Commissioning

12) Fault Diagnoses

13) Installation Drawings

3

1) Display and Control

2) Operation

In normal operation with no alarms or faults, the audible warning device will be OFF and the display will
be showing screen 2 below. The Temperature alarm trip point (setpoint) can be adjusted using the three
red buttons on the top board, see “Setting the alarm Trip Setpoint”. When the ambient temperature
exceeds the alarm setpoint, the audible warning will start pulsing, the display will show the alarm, see
screen 3, the common alarm BMS contact will operate, and if fitted, zone 2 BMS relay will operate, the
remote beacon/beacon sounder will operate and the SMS will send an Alarm message. The unit will
remain in this mode until the “Mute” button has been pressed when the display will change to show the
status of both temperature and water detection alarms, see screen 5, the audible warning will stop and if
fitted the remote sounder will stop. Once the temperature drops below the setpoint by 2ºC, the system will
automatically reset to normal operation provided the “mute” button has been operated. If the temperature
falls below 0ºC or above 50ºC, the audible warning device will sound, and the display will change to
screen 7. The water detection alarm will operate in the same way as described above but screen 4 will be
displayed when a leak has been detected, again this will stay in this mode until the “Mute” button has
been operated to acknowledge the alarm. If a temperature sensor becomes disconnected or damaged, the
audible warning will sound and the display will show the faulty sensor, see screen 6. Again unit will
remain in this mode until the “Mute” button is pressed. Once the sensor fault has been rectified, the
system will automatically revert to normal running. If the water leak detection sensor becomes
disconnected, the unit will go into “Leak Detected” alarm as described above. If the sensor power fuse
blows or is removed, the audible warning will sound and the display will show screen 8. The unit will
remain in this mode until the “Mute” button is pressed. Once the fuse has been replaced, the system will
automatically revert to normal running provided the “mute” button has been operated.

Water & Temperature

Status Display

Mute Alarm Push

Button

Temperature

Alarm Set Point

Buttons see item

5 below

“ZONE 1”

Removable Terminal

Block for Leak Detection

Sensor

Sensor power

fuse

“ZONE 2”

Removable Terminal

Block for Temperature

Sensor