checking safety devices on gas hob and oven

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g60rge

Gas Engineer
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hi, im working towards my acs and have a query,

if im checking safety devices on a gas hob/cooker,

letby/tightness

lid shut off

check controls are working and not letting by or stiff/loose

check stability device/hose connections etc

i check the fsd by lighting the oven and watching it light on low flame, once the phial has heated up it allows the main burner to light (30 secs). Shut the gas off, wait for the click (time it) turn back on, should start off on low flame again.

check the flame returns to bypass after temp is satisfied

check the seals with a sheet of paper

now ive found nothing in my notes to suggest checking ffd shut off on hobs and cookers and doing the tightness test to ensure gas isnt being passed to the burners which worries me.

thinking about it, if the gas supply was interrupted and then reinstated, but the ffd shut the gas off, how is the appliance reset? as ive never seen one with a reset button. if they dont, then what happens?

thanks in advance
 
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Certain hobs nowadays have an fsd

Other than that there is only clearances etc.
 
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"i check the fsd by lighting the oven and watching it light on low flame, once the phial has heated up it allows the main burner to light (30 secs). Shut the gas off, wait for the click (time it) turn back on, should start off on low flame again."

there will be no click on an oven vapor pressure fsd, after your 30 sec you just turn gas off and wait 90 sec max then relight, it should then light on low flame
 
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i did realise that but the college will probably have old appliances in there.

any advice what i should do in my acs exams if the mi's dont say if it has one or not?
 
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mikegas said:
"i check the fsd by lighting the oven and watching it light on low flame, once the phial has heated up it allows the main burner to light (30 secs). Shut the gas off, wait for the click (time it) turn back on, should start off on low flame again."

there will be no click on an oven vapor pressure fsd, after your 30 sec you just turn gas off and wait 90 sec max then relight, it should then light on low flame
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ahh i see, thats all i need to check then, other than the other stuff i mentioned, thats good.

how about the hob? all i remeber doing at college and with the engineer i was with on my portfolio (whom i dont like bugging too often which is why im here) is check the controls are working correctly and the flame looks good.
 
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g60rge said:
ahh i see, thats all i need to check then, other than the other stuff i mentioned, thats good.

how about the hob? all i remeber doing at college and with the engineer i was with on my portfolio (whom i dont like bugging too often which is why im here) is check the controls are working correctly and the flame looks good.
Click to expand...

if it doesnt have a lid or fsd's on the hob the yes
 
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