Duomo BX444 Скачать руководство пользователя страница 4

Typical External Wiring Diagram for BX444

Electrical Connection

The sensor can be located up to 100m from the gas
detector. Cable size should be 1mm CSA. If the
sensor cables are run separately in specific conduit it
is not essential to use screened cable but if the cables
are routed through conduit or trunking containing other
wiring the use of screened cable is advisable. The
wiring should be performed by a qualified person in
accordance with current regulations.

Fig.4

Cable Entry Points

The plug in terminal rail makes installation easy and
quick.

Note: It is essential that enough length is left in the
cable loom to allow the facia to be hinged open as
shown in fig (3).  The wiring must be checked prior to
powering up the system.

Содержание BX444

Страница 1: ...el of gas continues to rise then the main alarm relay is activated to either in the case of explosive gases break the electrical sup ply to the Safety Shut Off Valve or for CO sound a Gen eral Alarm to allow evacuation of the area Features The Pre Alarm can be adjusted in the case of Natu ral Gas or LPG from 8 to 15 of the Lower Ex plosive Level LEL For Carbon Monoxide it can be adjusted from 120p...

Страница 2: ...ess to reset alarm This resets the detector memory 11 TEST Push button Provides full function test of detector 12 FAULT Flashes when the sensor is either faulty connected incorrectly or not selected 13 OVERLOAD Power consumption of the BX444 is too high 14 TOXIC Indicates that the Carbon Monoxide function is selected BX444 Facia 6 7 8 9 10 11 12 13 14 1 2 3 4 5 Digital Display This shows the quant...

Страница 3: ...es above the room ambient may be experienced It is if possible better to mount the sensors on the opposite wall This is of course dependant on the size of the protected area Natural Gas is lighter than air and therefore will obviously rise therefore the SG590 methane sensor should be mounted 300mm from the ceiling of the protected area For LPG Propane and butane the SG590 LPG must be connected LPG...

Страница 4: ... cables are routed through conduit or trunking containing other wiring the use of screened cable is advisable The wiring should be performed by a qualified person in accordance with current regulations Fig 4 Cable Entry Points The plug in terminal rail makes installation easy and quick Note It is essential that enough length is left in the cable loom to allow the facia to be hinged open as shown i...

Страница 5: ... ON position and switch 1 to the off position In the above picture this shows zone 1 Toxic zone 2 explosive zone 3 toxic zone 4 explosive Pre Alarm Sensitivity Adjustment The Pre Alarm can be adjusted in the case of Natural Gas or LPG from 8 to 15 of the Lower Explosive Level LEL For Carbon Monoxide it can be adjusted from 120ppm to 250ppm Adjustment is made using the pre alarm potentiometer marke...

Страница 6: ...of this gas detector Duomo will not be held responsible or liable This Gas detector is a safety device and therefore should only be maintained and installed by qualified persons To ensure correct function after installation Duomo provide a commissioning service using cali brated test gases For the service call 01905 797989 Warning To make the main alarm a latching operation move switch 1 shown to ...

Страница 7: ...modes i Auto reset ii Latch with manual Reset When you have selected the correct memory function you must press the reset button so that this change takes effect The main alarm relay changes over the volt free relay and then with the Main Alarm light still on the relay re energises Check the position of the Jumper link JP1 This is located between the two terminal plugs When in the C position the r...

Страница 8: ...upply 4 20mA output CO200 and 230 Catalytic Carbon Monoxide Gas Sensor with digital display and Change over Relay 30ppm CO IP55 Product Overview Gas Detection CO200A CO Sensor for Car Parks 12 or 24VDC supply 4 20mA Output IP55 Gas Safestart Guarantee This device is guaranteed for a period of 12 months from the date of purchase Conditions Substitution free of charge of any component recognized as ...

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