CMR Electrical ODT2-1 User manual

CMR Electrical Ltd
Bolton House
Five Chimneys Lane
Hadlow Down
East Sussex
TN22 4DX
Tel: [phone]
Bunded Tank Oil Leak Alarm
Type: ODT2-1
Installation and Operation
Manual

2
Contents
1) Display and Control
2) Operation
3) Display Screens
4) Sensor Wiring
5) Power, BMS, Beacon and SMS Connections
6) Beacon and Beacon Sounder
7) Fitting an SMS / Email Messaging System
8) Commissioning
9) Maintenance
10) Fault Diagnosis
11) Installation Drawing ODS Sensor

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 1 (see below).
When the sensor detects a leak, the audible warning will start pulsing, the display will show screen 2
below, and if fitted, the following optional features will operate:
Common alarm BMS contact
BMS relay
Remote beacon or beacon sounder
SMS system will send an Alarm message
The unit will remain in this mode until the “Mute” button has been pressed. On muting the alarm, the
display will stop pulsing, the audible warning will stop and if fitted, the remote sounder will stop. Once
the leak has been cleared up and oil removed from the sensor, the system will automatically reset to
normal operation. If a sensor becomes disconnected or damaged, the audible warning will sound, and the
display will show screen 2.The 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 provided the
“mute” button has been operated.
If the electronic sensor power fuse operates, the audible warning will sound, and the display will show
screen 3 (see below). The unit will remain in this mode until the “mute” button is pressed. To reset the
fuse, turn off and on the alarm unit, the system will automatically revert to normal running provided the
“mute” button has been operated.
Zone Status
Display
Mute Alarm Push
Button
Removable Terminal Block for
Remote Sensors
(see item 4 below)
Sensor Power
F
use

4
Display Screens
Screen 1
No leaks have been detected
Screen 2
One Zone
New oil leak found or sensor fault
Screen 3
The sensor power fuse has blown
4) Sensor Wiring
4a) Only one sensor fitted to each zone
Only fit one sensor per zone to “Sig 1” terminal, do not use “Sig 2” terminals. Using the pluggable 4 way
terminals as shown in Item 1 above, connect the sensor to the alarm unit as follows using a 3 core
0.22mm cable. The sensor cable should not exceed 100m in length, and should not be run in parallel to, or
near, any power cables, bus-bars or any source of electrical or radio interference.
ODT2 Sensor
Alarm Unit
Terminal
Reference
Sensor Cable
Colour
A+ Red
A- Black
Sig 1 Blue sensor 1
Sig 2 DO NOT USE

5
4b) Two sensors fitted to each zone
To be able to fit two sensors to each zone, the two silver pins marked “A” and or “B” must be fitted with
a linking connector.
Using the pluggable 4 way terminals as shown in Item 1 above, connect the sensors to the alarm unit
using a 3 core 0.22mm cable as below. The sensor cable should not exceed 100m in length, and should
not be run in parallel to, or near, any power cables, bus-bars or any source of electrical or radio
interference.
ODT2 Sensor
Alarm Unit
Terminal
Reference
Sensor Cable
Colour
A+ Red
A- Black
Sig 1 Blue sensor 1
Sig 2 Blue sensor 2
4c) Retrofitting an additional sensor to a zone
You would have received with the additional sensor a small black (sometimes grey) linking connector
(see above picture). First power down the unit and plug the linking connector so it shorts out the two
silver pins (“A” or “B”) to the zone you are adding a sensor to, (see above picture). Wire in the additional
sensor as outlined in Item 4b.
5) Power, BMS, Beacon and SMS Connections
The Common alarm relay is normally energised, de-energised in alarm or power fault, therefore
both “Common Alarm” contacts are identified correctly when the unit is powered and has no
current alarms.
90 to 265VAC
Input power
If Fitted
2 x common alarm and
power fault volt free
BMS contacts If Fitted
Individual zone
alarm contacts to
BMS
If Fitted
12VDC
output to
Beacon or
Beacon
Sounder
If Fitted
Output to
SMS
Linking connector
fitted so that two
sensors can be used on
this zone
Linking connector NOT
fitted, only one sensor
can be used on this
zone

6
Output Volt Free contacts for use with a Building Management System
Function Required Fitted as Standard Relay Output
Terminals
Zone 1
A
larm
No
Z1 Alarm
Zone 2 Al
arm
No
Z2 Alarm
Oil leak alarm contact 1
any zone &
power fault
Yes Common Alarm
& Power F
ault
Oil leak alarm contact 2
any zone & power fault
Yes Common Alarm
& P
ower
F
ault
BMS relays do not operate for blown fuse or sensor fault
6) Beacon and Beacon Sounder
If a beacon or beacon sounder is supplied, connect to the three terminals identified as “Beacon” as
follows;
6a) Non Mutable Beacon or Beacon Sounder
If the beacon or the beacon sounder is to be active (on all the time) until the water leak alarm has
cleared, connect as follows:
Terminal
Reference
Connect Beacon / Beacon Sounder
terminals to the following terminals
+V
Beacon +V
or Strobe /Tone +
terminal
BOV
Beacon
-
V or Strobe /Tone
-
terminal
SOV
NO connection to this terminal
6b) Mutable Beacon or beacon sounder
If the beacon or the beacon sounder is to turn off when the “Mute” push button is pressed, connect
as follows:
Terminal
Reference
Connect Beacon / Beacon Sounder
terminals to the following terminals
+V
Beacon +V or Strobe /Tone + terminal
BOV
NO connection to this termin
al
SOV
Beacon
-
V or Strobe /Tone
-
terminal
6c) Mutable sounder Beacon on all the time
If the beacon is to remain alight all the time an alarm is current, but the sounder is to be turned off
when the “Mute” push button is pressed, connect as follows:
Terminal
Reference
Connect Beacon / Beacon Sounder
terminals to the following terminals
+V
Strobe and Tone + terminal
BOV
Strobe
-
terminal
SOV
Tone
-
terminal
Warning; if the above option “6c” is required, remove the electrical link connected between the second
(Strobe -) & third terminals (Tone -) terminals within the sounder.

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7) Fitting an SMS Messaging System
If an SMS text messaging or Email messaging unit is supplied, connect it as follows to the 3 way terminal
block identified as “SMS”:
Terminal
Reference
Cable wire colours fitted
to the messaging system
Z1
BLUE
COM
BLACK
DC
RED
8) Commissioning
Once the unit has been connect as described above, turn on the mains power to the unit. The display
should illuminate display screen 1. Dip the sensor into a small about of oil and ensure that the alarm unit
goes into alarm as described in item 2 above.
9) Maintenance
The system should be fully tested using the commissioning procedure at least once a year for correct
operation. A check should also be made on a regular basis or at least every six months to ensure that the
sensor is not contaminated with dirt, damaged or has been moved away from its correct location. If the
sensor is found to be contaminated with dirt, it should be cleaned using a brush and soapy water, then
dried using clean tissue paper. Re-test using the commission procedure.
10) Fault Diagnosis
Fault Possible Reason
Display is OFF and the unit appears dead 1) No power to the control unit. Test with a meter.
2) The power fuse has blown. Test the fuse with a meter.
Unit displays a leak even though the sensor is
clean with no oil touching the sensor
1) Check the alarm unit terminal blocks for bad connections
2) Check the field wiring for open or short circuit.
3) Using a short cable link terminal, “A+” & “Sig”, the alarm
should clear. If it does the field wiring or sensor is faulty.
4) Disconnect the sensor and wire direct to the alarm unit to
eliminate the field wiring.
Screen 4 appears in the display 1) The internal sensor fuse has blown due to over current. Un-
plug both 3 way sensor terminal connections and check the
sensor wiring for short circuits. Before re-connecting the
sensors, replace the 100mA fuse, the display should change
and display zone 1 and 2 as alarm (screen 2). If this screen
does not appear, Return unit to manufacturer. If it does
appear, plug each zone sensor back in one at a time, noting if
the fuse blows again and on which zone.
Horn not working 1) System fault. Return to manufacturer.

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11) Installation Drawings ODT2 Sensor
Not all the shown devices may be available on your system
A-
L E N
Mains
3amp
Supply
N/O
COM
N/C
Z1 Alarm
N/O
COM
N/C
Z2 Alarm
SOV
BOV
+V
Beacon
Com
Z1
DC
SMS
ZONE 1 ZONE 2
Volt free contacts
to a BMS system
Beacon or
Beacon Sounder
See Item 6 in the
installation
Manual
N/O
COM
N/C
N/O
COM
N/C
A+
Sig 1
Alarm
SMS Text
Messaging
Strobe
Tone
+V
SMS
See Item 8 in the
installation
Manual
Common alarm
Sig 2
A-
A+
Sig 1
Sig 2
Bund Tank
Sensor
3 core 0.22mm 12VDC cable
Bund Tank
Sensor