Main Multipoint BF Water Heater

[Sandeep89]

Hi,

Customer has a Main Multipoint Balanced Flue water heater.

Both the gas rate and burner pressure are under what the MIs state. MI state burner pressure is pre factory set at 14.1mbar and should not need adjusting and my checks showed burner pressure as 6mbar. Gas rate MI state 2.9 m3/hr and I got 1.9 m3/hr.

Carried out combustion checks which were all ok and pipe size are all ok.

Now the MI does not state anything on if burner pressure can be adjusted as it is pre factory set. The appliance is over 10 years old. Would this ID and also would I be looking towards replacing the gas valve.

Newly qualified engineer so any guidance woild be appreciated.

Thanks

 

[ShaunCorbs]

Did check the flame assembly eg not dirty etc ?
Also check the gas valve doesn’t have shail dust / flakes in

 

[Sandeep89]

Did check the flame assembly eg not dirty etc ?
Also check the gas valve doesn’t have shail dust / flakes in

@ShaunCorbs thanks for replying back. No that is something I that did not check however I have just asked the customer regarding service dates etc onit and they have said they cannot remember last time they got it serviced so Im assuming has been a while.

I have advised to service, could this be a cause off the issue.

 

[Gasmk1]

there is a small domed filter in the gas inlet check this as has already been said for copper shale.

 

[Sandeep89]

there is a small domed filter in the gas inlet check this as has already been said for copper shale.

Hi

Thanks for advice will check the gas inlet. So would something like this fall under ID, AR?

 

[ShaunCorbs]

Depends on combustion readings

 

[Sandeep89]

Depends on combustion readings

Combustion readings were all within parameters

 

[ShaunCorbs]

I wouldn’t then just note it down needs further investigation

 

[Sandeep89]

I wouldn’t then just note it down needs further investigation

Thanks for all the help appreciate it.

 

[Sandeep89]

Just had another quick question for my own knowledge. On these gas valves should there be a regulator of the burner pressure ever needs to be adjusted.

Thanks

 

[Gasmk1]

from memory no its sort of preset think its a sort of butterfly valve, do you not have the manual to hand

Document - https://baxi-public.partsarena.com/Documents/Document?manufacturerId=245&productType=Water%20Heater&productRange=Multipoint&modelId=12091&documentId=4387&documentName=Multipoint%20BF%20iss%2002

section 12 is commissioning

 

[Sandeep89]

from memory no its sort of preset think its a sort of butterfly valve, do you not have the manual to hand

Document - https://baxi-public.partsarena.com/Documents/Document?manufacturerId=245&productType=Water%20Heater&productRange=Multipoint&modelId=12091&documentId=4387&documentName=Multipoint%20BF%20iss%2002

section 12 is commissioning

Yeah i had a read through it yesterday. Does not show anything in regards to adjusting burner pressure other than that it is pre factory set.

 

[Sandeep89]

there is a small domed filter in the gas inlet check this as has already been said for copper shale.

What is the best way to go about cleaning this filter.