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Vaillant Ecotec pro Low working gas pressure

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Victor555

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I would like some opinions on this situation.

Vaillant Ecotec pro 28

Installed 2 years ago,

Commissioned Gas pressure reading 16.5mb at max rate.

1st annual service passed.(2018)

Just has second Service all combustion tests passed, and issued a Warning Advice notice of Immediately dangerous (ID) Reason Gas pressure on gas valve 14mbar, min requ 17mb.

Action: New 22mm gas pipe.

Vaillant Boiler installation and maintenance instructions says

Permissible gas flow pressure for operation with
G20 natural gas: 1.3 … 2.3 kPa (13.0 … 23.0 mbar)

Pressure at meter good, was checked by cadent with boiler on and all gas hobs on full.
No reply from original Gas safe installer.

Should I ask a for a second opinion on why it has classed a ID?

Boiler was switched off, but gas was not capped off.

Would it be safe to run boiler ? ( has been working fine, with no faults, good flame)

Question, Approx How much would running new pipe on outside property cost from gas meter to boiler. Metre at front if house, boiler at back of house 1st floor bedroom.
 
Depends on kw of boiler I’d be looking at some 28mm pipe there if it’s a long run. If it’s ID it should be capped off so it sounds like an indecisive engineer. You mention good flame you shouldn’t be removing the front cover of your boiler as it creates a combustion seal. It’s not just about flame picture it will also be the FGA readings, I assume he did one
 
When I meant flame good, was referring to
upload_2019-3-26_10-13-57.png

also no LF faults
 
How did cadent test if the boiler is off?
You can get a second opinion, they can cut a test point under the boiler to get a true reading
 
As we say we don’t know distances routes or where you are in the world so we can’t comment on cost
 
You need a second opinion from a Gas safe registered Engineer who has carried out some on site tests.

The 14 mbar W.P. (Working pressure) is not something I would consider Immediately dangerous but I do not know the reasons he came to that conclusion?

If it was considered to be immediately dangerous, I would expect the Engineer to ask your permission to disconnect it from the gas supply and also issue a warning notice explaining the reason.
 
Last Plumber said:
You need a second opinion from a Gas safe registered Engineer who has carried out some on site tests.

The 14 mbar W.P. (Working pressure) is not something I would consider Immediately dangerous but I do not know the reasons he came to that conclusion?

If it was considered to be immediately dangerous, I would expect the Engineer to ask your permission to disconnect it from the gas supply and also issue a warning notice explaining the reason.
Click to expand...
The notice says " Gas working pressure at P1 on gas valve 14mbar min req, 17mbar.
Details of action taken: Boiler off, gas off. remedial action required: New 22mm gas pipe.
But thr gas is still on, so wanted to know if running at 14mbar is ID?
 
I wasn't there to witness why it was classified as i.d. I (like anyone else) would need to carry out various tests in order to arrive at a decision. Sorry, I know this is little help and I hope you understand that as registered Engineers, it would not be fair to undermine a decision made by another registered Engineer over the internet, based purely on what you tell us. The Engineer who you dealt with may have had good reason to arrive at the decision he did.

There is a bit of conflicting information though. Above, you mention the 13 mb to 23 mb which comes from the newer manuals. The Engineer has wrote 17 mb required. That information was from older manuals so which one do you have?
 
Last Plumber said:
I wasn't there to witness why it was classified as i.d. I (like anyone else) would need to carry out various tests in order to arrive at a decision. Sorry, I know this is little help and I hope you understand that as registered Engineers, it would not be fair to undermine a decision made by another registered Engineer over the internet, based purely on what you tell us. The Engineer who you dealt with may have had good reason to arrive at the decision he did.

There is a bit of conflicting information though. Above, you mention the 13 mb to 23 mb which comes from the newer manuals. The Engineer has wrote 17 mb required. That information was from older manuals so which one do you have?
Click to expand...
I have the new one. not sure why engineer wrote down min req. 17mbar. maybe he was not aware of new values?
 
Victor555 said:
I have the new one. not sure why engineer wrote down min req. 17mbar. maybe he was not aware of new values?
Click to expand...
Maybe not!
Best thing to do is inquire. He may well have the 17 figure in mind and be unaware that it has been altered recently.
Worth asking in my opinion, it could save an expensive job.
 
Last Plumber said:
Maybe not!
Best thing to do is inquire. He may well have the 17 figure in mind and be unaware that it has been altered recently.
Worth asking in my opinion, it could save an expensive job.
Click to expand...
Agree. I have been in touch will the call centre and they wont send another engineer until I can provide proof/paper work from candent to show that gas meter pressure was checked. Thats going to take another 5days!.
 
Victor555 said:
Agree. I have been in touch will the call centre and they wont send another engineer until I can provide proof/paper work from candent to show that gas meter pressure was checked. Thats going to take another 5days!.
Click to expand...
If you are without heating and Hot water because of something you think may be their fault, then you could insist on a visit?
 
Bet he’s tested from the gas valve need to add your resistance eg normally around 2.5 mbar and 1 for your line so total 3.5 mbar
 
Harvest Fields said:
Nope. I fit one when installing the boiler. As I once had 14.5 at the valve. Put a test point in before the boiler and had 19 at the boiler.
Click to expand...
Thanks Very interesting ...

On a side note. When I requested to have the condensate trap cleaned, he put it back without filling with water. When I asked why? As Service manual says to, his reply was no need for this type of boiler, when boiler runs it will fill by it self.

Is he right?
 
Victor555 said:
Thanks Very interesting .

On a side note. When I requested to have the condensate trap cleaned, he put it back without filling with water. When I asked why? As Service manual says to, his reply was no need for this type of boiler, when boiler runs it will fill by it self.

Is he right?
Click to expand...

No. The condensate trap should be filled prior to running the Boiler. If the trap is dry, products of combustion will exit the condensate pipe termination point until the trap has filled.

If all that you say is true, I think you should voice polite concern in writing (email) to the service manager.
 
Victor555 said:
Thanks Very interesting .

On a side note. When I requested to have the condensate trap cleaned, he put it back without filling with water. When I asked why? As Service manual says to, his reply was no need for this type of boiler, when boiler runs it will fill by it self.

Is he right?
Click to expand...
We’re you watching, reading the book and offering an opinion during the service?
 
Valliants are known to loose pressure through the gas valve ask your GSI to install a test point before the gas valve and retest , you should have 21mbar +/- 2mbar at the meter and 20 mbar +/- 2mbar so no lower than 18mbar at this test point on full load . Kop
 
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