Potterton paramount 3 115kw

[Christopher Powell]

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

 

[Last Plumber]

Are you Commercial?
How did you test them?

 

[Christopher Powell]

Yes I'm commercial.

 

[Last Plumber]

Yes I'm commercial.

How did you test them?

 

[Christopher Powell]

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.

 

[ShaunCorbs]

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

 

[Christopher Powell]

No this was after doing analysis and pressures etc

 

[ShaunCorbs]

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

Should be fired gas off that should give you your 133

 

[Christopher Powell]

Surely it should lock out regardless though. First time I've done one of these so was just going by manufacturers technical advice. Not much info in manual. I'll see if I can get back to it this week before my boss quotes for 2 new PCBs.

 

[ShaunCorbs]

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

 

[Christopher Powell]

So would I turn it off, Isolate the gas and then turn it back on or isolate gas as soon as I turn it back on?

 

[ShaunCorbs]

boiler demand
boiler fires
once fires turn gas off immediately

this should produce a hard lock out eg 133

 

[Christopher Powell]

Ok nice one. I will give it a go. Will let you know the outcome.

Thanks for the advice.

 

[Last Plumber]

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.

 

[Christopher Powell]

The gas valve has three dials on the side of it, 1 for low fire and 1 for high fire. These are side by side there's another 1 below it with a plastic cover over it would this one zero the pressure monitor?

 

[Last Plumber]

The gas valve has three dials on the side of it, 1 for low fire and 1 for high fire. These are side by side there's another 1 below it with a plastic cover over it would this one zero the pressure monitor?

I can't remember. It has been a while since I worked on one of those.
Does it look like this?

 

[Christopher Powell]

Yeah something like that

 

[ShaunCorbs]

Dungs gas valve prob

 

[Christopher Powell]

Called potterton back today, another fine technical advisor advised me these boilers don't go into lockout for gas or water pressure issues they auto reset themselves so the 132 code is as far as it'll go ??

 

[ShaunCorbs]

Yea so soft lockout

Hard lockout would be my test eg flame rect

 

[Christopher Powell]

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

 

[Christopher Powell]

Once again this forum has been a wealth of knowledge . Thanks for the replies.

 

[Last Plumber]

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

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.

 

[Christopher Powell]

Disconneced flame sensor, tried to start boiler. 3 failed attempts and it went into lockout requiring manual reset code 133.

 

[Last Plumber]

Disconneced flame sensor, tried to start boiler. 3 failed attempts and it went into lockout requiring manual reset code 133.

Excellent. Thanks for letting us know.