Boiler servicing process.

[stratplus]

every 4 years a full strip and clean / replace burner gasket etc also the normal yearly (normally allow half a day)

every other eg 1,2 and 3 etc (yearly)

check expansion vessel,
tightness test gas system,
clean maggy and top up with fresh inhby,
bleed rads,
check system pressure and top up,
check system controls are working,
clean condense trap and refill,
clean condense pump if there is one and check operation
gas rate system,
fga boiler

(normally allow 1.5-2 hours)

So when you check expansion vessel and identify it needs topping up, do you drain the vessel completely and re-charge with air?

 

[ShaunCorbs]

So when you check expansion vessel and identify it needs topping up, do you drain the vessel completely and re-charge with air?

Already drained down to check vessel pressure

As you can't check it with system pressure in

 

[stratplus]

Already drained down to check vessel pressure

As you can't check it with system pressure in

Ok, so you remove all of the vessel water when draining boiler via a regin pump tool or similar. Ex vessels are filled with nitrogen so just wondering about issues mixing air with nitrogen?

 

[ShaunCorbs]

Ok, so you remove all of the vessel water when draining boiler via a regin pump tool or similar. Ex vessels are filled with nitrogen so just wondering about issues mixing air with nitrogen?

Unless it's commercial or filled with nitrogen it gets air put back in unless they want it

If they do all the air gets sucked out then refilled with nitrogen

 

[London Gas]

How do you identify a gunked hx?

You cant unless its a Worcester and you take your fan pressure, I just find more and more and hear about it happening with people doing these 20 minute services, new customers always tell me 'the last guy is here every year for 30 minutes max)

 

[stratplus]

You cant unless its a Worcester and you take your fan pressure, I just find more and more and hear about it happening with people doing these 20 minute services, new customers always tell me 'the last guy is here every year for 30 minutes max)

I haven’t found one yet with poor fan pressure but often have to alter the co2 especially on min.

 

[SavageW]

If fan pressure is within tolerance, Gas rate ok &WP (on Worcester’s)then adjusting the gas valve is ok..so I’m told to believe,taking the fan pressure an measuring the gas rate are checks you would do an confirm are correct before adjusting.Other manufacturers state you can’t adjust the gas valve & that a full strip down & gaskets replaced

 

[London Gas]

Every manufactures different, some baxis state if air intake is ok and all other checks are fine you should adjust, when going on Worcester’s courses or speaking to them they will say adjust if the fan pressure is correct although when I’m finding -2mbar I don’t think that’s happening in a year with perfect readings

 

[SavageW]

It’s probably not mate,as long as your doing the right thing then happy days.Always going to come across scenarios like this an a lot of the big companies provide an annual safety check,not a annual service..never going to be as in depth as it should unfortunately