Fan Pressure Test

[jaydebruyne]

So I did my first full Worcester Greenstar service today.. cleaned out the burner and didn't bother testing the fan pressure to see if it needed it or not.

Mainly being that the mis say to do it with a digital gauge and I don't have one.

Can it not be done with a normal u-gauge?

 

[Paulplumb]

Surely your gas analyser has a digital gauge built in?

 

[jaydebruyne]

Surely your gas analyser has a digital gauge built in?

I've no idea.. Anton Evo3. I've never actually checked.

I had a Kane 455 which was nicked from my van and my boss gave me his old Anton so I just use it for ratio and gas leaks.

But can the fan pressure test be done with a normal u-gauge?

 

[Billy Bob Bob]

if you stripped it down,changed the burner gasket and its fga readings were good,including flue integrity,negative pressure means nothing

 

[jaydebruyne]

if you stripped it down,changed the burner gasket and its fga readings were good,including flue integrity,negative pressure means nothing

They were good and yup, changed burner gasket and electrodes . But just want to know for future reference.

 

[Masood]

Normal u-gauge won't give you as accurate a figure but you can clearly see if the fan is pulling -1 or -4 mbar. As long as it's above (I think) -2.5 it's good enough..

 

[jaydebruyne]

Normal u-gauge won't give you as accurate a figure but you can clearly see if the fan is pulling -1 or -4 mbar. As long as it's above (I think) -2.5 it's good enough..

Cool. Cheers Masood

 

[Chalked]

The evo 3 will do pressure , differential pressure and tightness test.

 

[gassafe]

Normal u-gauge won't give you as accurate a figure but you can clearly see if the fan is pulling -1 or -4 mbar. As long as it's above (I think) -2.5 it's good enough..

Each boiler had a different negative reading, it's listed in the book, -2.5 sounds low for a Worcester on some models so be careful!

Iv got a digital manometer & its perfect for this function.

 

[jaydebruyne]

I think Worcester mis say -3.5 ... I could be wrong. I've actually just got the anton out my van to go through all the features lol didn't know I could do half the stuff I can with this

 

[gassafe]

I prefer a separate digital gauge, can pick them up cheap on eBay probably, mainly because I can then have the analyser in, gauge on gas valve inlet & the gauge on fan test point all in one, espically when it's a small house & on max locks out the boiler fairly quickly so having to use the anylser for both takes more time!