BX216 operation
Maintenance procedure
This detector must be function checked as described above using calibrated test gas every 6 months. To arrange for a
Duomo engineer to conduct this work or to arrange a service contract please call 01905 797989.
Before powering up the BX216 once again check that all electrical connections are correct.
1. Apply 230V supply to the Ph and N terminals. Ensure that the correct fuse is used in the supply. (3 or 5A max.)
2. All of the lights on the fascia will light up in turn. This will take approximately 20 seconds. This checks the function of
all the LED's.
3. The ON LED will remain flashing for about 90 seconds. This is the sensor warm-up period. The gas detector will not
provide gas detection during this period. When the ON light becomes constant the detector is in operation.
4. By pushing and maintaining pressure on the manual TEST button a function test can be performed for all pre-alarm
relays and main alarm relay, together with LED's and audible alarm.
The sequence will be:
a) The pre-alarm threshold (user selected) and Pre-Alarm 1 LED will be actuated. The Pre-Alarm 1 relay
will be changed over.
b) The 20% LEL / 300
ppm
and Main Alarm LED will be actuated. The Main Alarm relay will be changed over. The
relevant Alarm LED's will light to show which zones are in alarm.
By releasing the the manual TEST button the lights will go out and the audible alarm will cease. If a latched alarm function
on the main relay is configured this will remain on until the RESET button is pressed.
5. In order to conduct a full function test it is essential to use Duomo or equivalent calibrated test gas. The maximum
concentrations are;
- 40% LEL for methane in air
- 350
ppm
for carbon monoxide
- 0.85% (MOL) for propane
Any higher than this can reduce sensor life. NOTE: NEVER TEST USING NEAT GAS. THIS WILL POISON THE SENSOR.
6. To simulate a sensor fault situation disconnect the sensor plug. The detector will go into a FAULT alarm and the sensor
fault relay will be actuated.
Commissioning
It is strongly recommended that this detector should be commissioned by Duomo Commissioning Engineers or
engineers approved by Duomo to carry out this work. A quotation for commissioning or service will be provided upon
request. Fax site details and preferred date for commissioning to 01905 774296 and the Duomo Service Department will
fax back confirmation.
The benefits of this equipment being commissioned by Duomo are:
On board spares. If for whatever reason this equipment doesn't function correctly Duomo engineers will have spares on
board to ensure that the commissioning is successful.
A Duomo Commissioning Certificate is provided.
It is prudent to make electrical connection to the detector terminal plus when withdrawn and leave the plug off the
detector so that the Duomo Engineer is the first to power up the unit on site. This allows wiring to be checked prior to
commissioning and avoids damage due to incorrect connection. Guarantees for this product will become void if damage
is caused by the installer.
w:
www.duomo.co.uk
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e:
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t:
01905 797989
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f:
01905 774296
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©
Duomo (UK) Ltd. 2007
