baxi duo tec

[desrob]

when in ch mode the boiler will fire on full rate for 30 seconds then go out for say a minute then fire again..it does this constantly,dhw is ok.as any body came across this before with this model,inlet gas pressure fine.

 

[mickie]

does the burner modulate? whats the flow temp like compaired to the return? is the return filter blocked?

 

[desrob]

does the burner modulate? whats the flow temp like compaired to the return? is the return filter blocked?

what return filter matey..

 

[Billy Bob Bob]

its fitted to the return iso valve also check fga settings

 

[desrob]

its fitted to the return iso valve also check fga settings

how do i access it,can i isolate then remove or is it a drain down,nothing in mi.....will do regarding fga...ta

 

[Billy Bob Bob]

turn off RH return side iso if it has a built in loop crack the nut bolted to the iso and bleed into a bowl then remove the nut filters behind it if theres no built in loop it will be a silver cap

 

[desrob]

turn off RH return side iso if it has a built in loop crack the nut bolted to the iso and bleed into a bowl then remove the nut filters behind it if theres no built in loop it will be a silver cap

i'll have a look tommorrow ta...on a different boiler fitting a worcester junior i 28kw,it came with a low nox chip, whats the benefits with lowering nox levels if any...?

 

[Billy Bob Bob]

i'll have a look tommorrow ta...on a different boiler fitting a worcester junior i 28kw,it came with a low nox chip, whats the benefits with lowering nox levels if any...?

less harmful pocs into the environment

 

[desrob]

less harmful pocs into the environment

why the choice ,why not fitted as standard,..strange.

 

[Billy Bob Bob]

not sure dont fit worcesters just fix them when they die,leak,blow up etc

 

[desrob]

not sure dont fit worcesters just fix them when they die,leak,blow up etc

i went back to this boiler and gas was fine co% 8.7 all good,the boiler when first knocked on runs fine until temp is reached ,then it just cycles constantly,down stairs is in 15mm on flow and return, upstairs is in 8mm and on all rads the flow is red hot and the return is cool,could this be due to a blockage on the main return pipework,and could the ch ntc be faulty causing these symptoms

 

[Billy Bob Bob]

did you clean the filter? thermister does not point to this

 

[desrob]

did you clean the filter? thermister does not point to this

yes filter ok

 

[Billy Bob Bob]

has it got a external room stat?

 

[desrob]

has it got a external room stat?

yes rf stat baxi's own