Basic duo tec 24he

[giarc00007]

Just installed above boiler with vertical flue. Getting explosive ignition when first ignites (not excessive but noticeable) but all checks spot on 19 mbar working pressure. Analyser readings fine. I know these are prone to probes. But this is new install.

 

[bigads28]

Isn't there an issue with an injector on these? Or am I thinking of another boiler.

Either way make sure what you've done is bob on, gas rates, flue etc, then call Baxi out.

 

[bewsh]

I think you are thinking of the Ideal Logic with regards to the injector issue

 

[giarc00007]

Isn't there an issue with an injector on these? Or am I thinking of another boiler.

Either way make sure what you've done is bob on, gas rates, flue etc, then call Baxi out.

gas rate spot on checked 3 times. flue all spot on. 2 x 45's, 2 x extension and 1 terminal supported at 3 points. Will check electrodes tomorrow but surely will be fine. Cant think what else could be. Is it more common with verticals for this type of thing?

 

[bigads28]

I think you are thinking of the Ideal Logic with regards to the injector issue

That's the one!

 

[Ermintrude]

Gas valve issues. Call out heat team register boiler as no heat and no hot water

 

[giarc00007]

Gas valve issues. Call out heat team register boiler as no heat and no hot water

thanks ermintrude. what you think gas valve opening early or late causing it? will phone heat team tomorrow see what they say

 

[Aquazone]

If you getting explosive ignition it's gotta be opening too early, thus building up gas. If it was late, prob just get ign lockout.

Do as Ermi has said and say no heat and hot water, say you have had to turn it off or whatever to make them come before Xmas!!

 

[giarc00007]

If you getting explosive ignition it's gotta be opening too early, thus building up gas. If it was late, prob just get ign lockout.

Do as Ermi has said and say no heat and hot water, say you have had to turn it off or whatever to make them come before Xmas!!

thanks aquazone will do.

 

[Ermintrude]

Might just be sloppy, Venturi in mess. If your all 100% then boiler should be so don't let heat monkeys fob u off or leave without fixing it . You want it fixed or replaced.

 

[giarc00007]

Might just be sloppy, Venturi in mess. If your all 100% then boiler should be so don't let heat monkeys fob u off or leave without fixing it . You want it fixed or replaced.

will phone tomorrow just looks bad when ive recommended boiler to customer and already getting baxi out. but checked
everything and installation fine.

 

[Ermintrude]

Just explain its working fine just its a bit noisy and you want it sorted as u don't want them to find it annoyance.

 

[giarc00007]

Just explain its working fine just its a bit noisy and you want it sorted as u don't want them to find it annoyance.

ok thanks ermintrude

 

[parkesy_plumb]

my last duo i installed made a horrendous noise the first time i fired it up, but then seemed to be fine. Customer rang me back 2 days later saying she could smell gas by the boiler so i flew out there and no signs of gas but the boiler stank really bad. Real sort of eggy smell.

Called heateam out and they couldnt find anything wrong with it and left .. luckilly the smell went away and i put it down to "newness" .. kind of put me off baxi a little

 

[arran197]

I commissioned one the other day, some smoke was coming off it. They tend to spray and light dusting of oil on metal products, so they don't corrode whilst in storage. I remember fitting a balanced flue gas fire a few years ago, it set all the smoke alarms off in the house! Nothing on the fga though. In the instructions manual, it actually warned that smoke alarms would probably go off on first use.

 

[dmheat]

What are your readings (ratio,CO and CO2) on min, and max?

Have you put your fga into the air inlet test point?

Could be a million and 1 reasons for it kicking the case on ignition. Excessive standing pressure (meter reg not locking up),electrodes,ignition gen,condition of burner and insulation panel,gas valve,air signal tube onto gas valve,flue,flue seals

When I was with heateam this was quite a common call out, it's usually incorrectly set gas valve, ensure min is 8.4% +- 0.2% and max 8.7% +- 0.2%. Will usually require adjustment for a vert or complex flue due to the additional resistance effecting the pressures

 

[giarc00007]

What are your readings (ratio,CO and CO2) on min, and max?

Have you put your fga into the air inlet test point?

Could be a million and 1 reasons for it kicking the case on ignition. Excessive standing pressure (meter reg not locking up),electrodes,ignition gen,condition of burner and insulation panel,gas valve,air signal tube onto gas valve,flue,flue seals

When I was with heateam this was quite a common call out, it's usually incorrectly set gas valve, ensure min is 8.4% +- 0.2% and max 8.7% +- 0.2%. Will usually require adjustment for a vert or complex flue due to the additional resistance effecting the pressures

thanks for input dmheat. ratio as far as can remember was 0.0009. standing pressure 24mbar working 19 mbar. checked air intake 20.6.

 

[giarc00007]

phoned baxi they cant get out till tues 30th, thats pretty crappy service but suppose time of year

 

[lambchop]

Isn't the air intake supposed to be 20.9?

 

[kris]

Keep us posted on findings mate ,
I had a failed tightness test on a new build on the site were at , turned out the gas valve was passing , it just seems that were having too too many issues on brand new boilers , and it looks bad on us to the customer especially if we advised them on the brand in the first place,,

 

[giarc00007]

Keep us posted on findings mate ,
I had a failed tightness test on a new build on the site were at , turned out the gas valve was passing , it just seems that were having too too many issues on brand new boilers , and it looks bad on us to the customer especially if we advised them on the brand in the first place,,

too right mate. it does look bad on installer. it was a bloody isar i took out telling customer one of worst boilers. put duo tec in needs looking at within 24hrs:banghead:

 

[dmheat]

Isn't the air intake supposed to be 20.9?

Latest TB re:boiler commissioning states air intake 20.6% O2 or greater with max 0.2% CO2 if I remember correctly

 

[giarc00007]

Latest TB re:boiler commissioning states air intake 20.6% O2 or greater with max 0.2% CO2 if I remember correctly

i tend to get 20.6 on most air intakes.

 

[dmheat]

i tend to get 20.6 on most air intakes.

Thats passable mate no probs there!

Def check max and min fga readings

 

[giarc00007]

Thats passable mate no probs there!

Def check max and min fga readings

will do dmheat. im round on tuesday doing other work in property.

 

[lambchop]

Latest TB re:boiler commissioning states air intake 20.6% O2 or greater with max 0.2% CO2 if I remember correctly

I've only commissioned 1 boilers this year at 20.9, no excuse for me, thanks

 

[dmheat]

I've only commissioned 1 boilers this year at 20.9, no excuse for me, thanks

Huh? Sorry if I offended? Been drinking since 3pm...lol. No offence intended?!

 

[lambchop]

Course not mate, I've been on the beers aswell! Me commissioning only 1 boiler is no excuse for not remembering the correct figures, I'd rather make myself look a t!t here than in front of joe public

 

[lambchop]

I rarely do installs, works not that slow for me, thank god lol

 

[dmheat]

Lol good man! Drunken Merry Xmas to you all!

 

[RoryD]

I would do all the basics - which you seem to have done, Inlet pressure, gas rate -air gas ratio?

 

[jtsplumbing]

We are expected to do more & more tests on new boilers now, think the next step is they will come in kit form, and we will have to assemble them on site,

 

[giarc00007]

just an update guys.baxi came out to check boiler. said the ignition is fine and within tolerance for a vertical flue. he said because of vertical run length you would expect to get slight explosive ignition. i wasnt to impressed but what can you do if they say its fine:32:

 

[Ermintrude]

Ask them why flue length changes physics and means that it's acceptable to have explosive ignition that will ruin boiler insulation pads. ?

 

[IDCHAPPY]

Must say, that's a new one on me :s