background image

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withdrawn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

-

e:

[email protected]

-

t:

01905 797989

-

f:

01905 774296

|

©

 

Duomo

 

(UK)

 

Ltd.

 

20

16

Maintenance

 

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.

Содержание BX444-Mc

Страница 1: ...esigned to be installed to EN60079 29 2 Operation When any connected sensor detects the presence of the target gas a 4 20mA signal is sent to the detector proportional to the level of gas The BX444 M then operates a pre alarm relay used for remote sirens or visual indicators If the level of gas continues to rise then the second pre alarm is actuated In the case of explosive gases when the level of...

Страница 2: ...les duomo co uk t 01905 797989 f 01905 774296 Duomo UK Ltd 2016 Technical Specification Power Supply Secondary Battery Battery Charger max 2 2Ah Power consumption Power Consumption Relay contact range Pre alarm No 1 Pre alarm No 2 General alarm Sensor fault No of remote sensors Input signal Device precision Reaction time Control Unit Working temperature Start up self diagnostic delay Suitable for ...

Страница 3: ...1 actuated This relay output de energises as the level of detected gas exceeds 13 LEL Natural Gas or 200ppm CO 9 2nd Pre Alarm At 13 LEL or 200ppm CO detected Pre alarm relay 2 actuated 10 Main Alarm 20 LEL concentration of gas detected Main alarm relay actuated 11 Fault Indicates a short circuit sensor fault loss of signal or incorrect connection of the sensor In case of a sensor failure the LED ...

Страница 4: ...ts down to full operation mode The Green display shows an absence of leakage of gas This indicates a no gas normal condition The Blue display shows percentage of Oxygen This display shows a normal condition The Red display shows an alarm condition where alarm Explosive gas threshold have been reached or passed The Red display shows an alarm condition where alarm Toxic gas threshold have been reach...

Страница 5: ...ly down When replacing sensors never seperate a sensing head from its PCB The sensor will have been calibrated using this particular board and therefore will not function correctly with any other Important Notes Always check the wiring before powering up the system Do not test this sensor with anything other than Duomo test gas see BX444 Mc Operation section for further information Concentrations ...

Страница 6: ...hence the operation of the gas valve When it is ON the relay is in a normally open state When it is OFF the relay is in a normally closed state NOTE This affects how the gas valve operates and means that you may need to change how it is wired to the BX444 Mc Example shows Positive Safety on Switch 2 on 2nd DIP switch set Main Alarm relay actuation method This can be configured to provide either a ...

Страница 7: ...nt 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 concentration...

Страница 8: ...Main Alarm can be checked by pressing the TEST button on the detector fascia Check that the main alarm action is configured for a latching alarm Switch 2 on 5th DIP switch Check the sensor wiring If the red Overload LED is lit a short circuit or overload has occurred on the sensor or the connecting cable Ensure that there is not an occassional gas leak This may be due to a valve or joint which lea...

Страница 9: ...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 p...

Отзывы: