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Potterton paramount 3 115kw

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Christopher Powell

Gas Engineer
Messages
40
Hi guys, just after a bit of advice.
Done ppms on two boilers in the title today. All good except both failed to go into ignition lockout.
Called potterton for a bit of advice and they said the PCBs will have a fault and will need changing. It seems a bit odd that both would have the same issue to me though.
Anyone have any experience on these and know if this is a common issue

Thanks in advance
Chris
 
Same as you'd test any lockout. Isolated gas while it was running and wait for the lockout. No lockout after 20 mins. Both boilers showed code 132 safety shutdown ( or something like that) but as soon as gas supply was re-established both fired back up. Looking through the book I'm assuming it should change to code 133 and lockout after so many attempts to relight.

Screenshot_20190520-195649.png
 
Did you isolate just after it’s fired as if you leave it some don’t fault out on no flame sig

They fault on gas
 
Too long so that’s why you got a different fault code

Should be fired gas off that should give you your 133
 
will lock out but wont be an ignition lock out will be a gas pressure / others etc

which its locked out on eg 132 just not a hard lock out eg needing reset
 
boiler demand
boiler fires
once fires turn gas off immediately

this should produce a hard lock out eg 133
 
The Gas pressure monitor/switch is shutting the Boiler down as the pressure falls, so it never gets to the stage where it locks out due to lack of flame as Shaun has said.
Sometimes you can wire out the Gas pressure monitor to bypass it or some will allow you to set them on zero, depends on the type.

If you do zero the switch, reset it properly once you're happy.
Why the MU's didn't think of this I don't know.
 
Dungs gas valve prob
 
Yea so soft lockout

Hard lockout would be my test eg flame rect
 
Christopher Powell said:
I'm going back tomorrow. Will disconnect flame sensor see if it locks out on that. I'm fairly new to commercial and that's the first boiler I've come across that doesn't lockout on loss of gas
Click to expand...

Be careful if you go down that road. I can't remember the type on that boiler but if it is an HT lead combination, it will start trying to re-ignite not long after you pull it off and you may end up upside down, white as a ghost and shaking on the other side of the plant room.

Having thought about this, I have a sneaky suspicion that the Gas pressure switch on these only prevents high fire? Not sure!!

If it does you may need to think of something else. I would be tempted to disconnect the gas valve and let it go through its ignition sequence. It will probably have four or five attempts and then lock out. You could do what you suggested and disconnect the FFD lead but I would do that first and then let it try to light rather than pull it off whilst running. You may not of meant pull it off whilst running, it could just be the way I read it?
Just thought I would say something in case!!

Let us know how you go on.
 

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