C08MS
Carbon Monoxide detector –
Installation Instructions
Table B – CO alarm response
CO Level (in ppm)
Red light
0 to 43
off
1 flash every
43 to 80
2 second
1 flash every
80 to 150
second
2 flashes every
> 150
second
2.4 Pre-alarm (red light flashing)
When the alarm detects over 43 ppm CO the red light flashes immediately. The rate that
it flashes will depend on the CO level detected as outlined in Table B. Note the Pre-alarm
signal may be triggered by CO coming for example, from cooking with gas, from car engines
or from nearby barbecues. This is usually not a concern, unless the pre-alarm signal persists
until the alarm sounds and the CO source is unknown.
2.5 Full alarm (horn sounding)
If the CO level persists at a dangerous level the Horn will sound at 85 dB(A). The interval
time between the Pre-alarm and activation of the horn will depend on the concentration of
CO detected as described in Table B.
2.6 CO Alarm memory
The CO Alarm memory is a useful and important feature. If the house is unoccupied it warns
the homeowner if the unit has detected CO gas and been in alarm in their absence. The
memory feature has two operation modes:
24 hour memory: After alarm, the RED light will flash at different rates every 50 seconds
depending on the level of CO detected – see Table B (24 hour Memory Response)
Memory recall on demand: To review the memory status after the 24 hour period press
and hold the test button, the red led will flash at the same rate as if CO was present - See
table B (Alarm response to CO being present)
Reset memory: Hold down the test button for over 12 seconds until the red light stops
flashing. Cover the horn with a cloth to muffle the alarm during this time. Please note that
the memory will also be reset when the unit is switched off.
Horn / Sounder
Red light
off
off
On within
2 flashes every
72 minutes approx.
50 seconds
On within
4 flashes every
18 minutes approx.
50 second
On within
8 flashes every
40 seconds approx.
50 seconds
2.7 What to do when the alarm sounds
1.
Open the doors and windows to ventilate the area.
2.
Turn off all fuel appliances where possible and stop using them.
3.
Evacuate the property leaving the doors and windows open.
4.
Get medical help immediately for anyone suffering the effects of carbon monoxide
poisoning (headache, nausea), and advise that carbon monoxide poisoning is
suspected.
5.
Call your gas or other fuel supplier on their emergency number. Always keep this
number in a prominent place.
6.
Do not re-enter the property until the alarm has stopped. (If the alarm has been
silenced by pressing the test button, wait at least 5 minutes so the alarm can check
that the CO has cleared).
7.
Do not use the fuel appliances again until they have been checked by a registered
installer or equivalent expert.
3 Installation
3.1 Where to place CO alarms
This alarm should be installed by a competent person. Ideally a carbon monoxide alarm
should be installed in:
Every room containing a fuel burning appliance, and
•
Remote rooms where occupants spend a considerable amount of time.
•
Every bedroom.
•
However if the number of carbon monoxide alarms to be fitted is limited, the following points
should be considered when deciding where best to fit the alarm(s).
If there is an appliance in a room where people sleep, place a CO alarm in this room.
•
Locate a CO alarm in a room containing a flueless or open-flued appliance.
•
Locate an alarm in a room where the occupant(s) spend most of their time. (e.g. sitting
•
room).
In a bedsit, the CO alarm should be placed as far away from the cooking appliance as
•
possible, but near to where the person sleeps.