New Boiler - Poor Heating - No Hot water.

[Geordieboy5]

Good morning all. Help required!

I've just had an Intergas OV30 Boiler installed by STL Heating. We have 13 rads in the house with 7 TRVs fitted. We cannot put the heating on or control the house temperature at all as the system was not balanced. We now have no Hot water so had to get a Corgi Registered Gas Engineer out. These were his observations of a poor installation, and he has asked for circa £850 to fix it;

1/ Insecure Flue. It needs to be screwed not a push Fit.
2/ Not enough TRV's added. 3 more need adding and 1 removed from the Hallway where the Thermostat is.
3/ Outflow temp is 76 deg, Inflow Temp is 70 Deg. This was signed off by the STL Heating Engineer. Return feed needs to be sub 55 Deg so the Condensing Boiler can actually condense.
4/ Addition of final TRV's will allow the system to balance. Balancing of the system was never done and could not be without the additional TRV's being added.
5/ 3 way valve Broken. (Not picked up on the installation). Replace valve and controller
6/ Re-add Central heating inhibitor.

Can anybody give me an honest answer to get this lot sorted please?

Many Thanks

 

[muggles]

I hope he was also Gas Safe Registered. CORGI ceased to be the registration body for gas engineers nine years ago...

A 30 OV is massively oversized for your house and will cost you a lot more to run. The smallest model, the 18 OV, would likely have been sufficient.

Why didn't you get the original installers back if you had concerns?

To answer your points...

1) Wrong. The manufacturers do not permit this flue to be screwed - it should be push fit only

2) Yes every rad should have a TRV

3) Correct. A symptom of the boiler being too big for the property I'm afraid. The only solution to that is to make them come back and replace it with a more appropriately sized one

4) B*llocks... you don't need TRVs to balance a system. In fact, balancing should be carried out with TRV heads removed

5) A conscientious installer would include the replacement of this in their estimate, but if he didn't then that's unfortunate. Should have been picked up on system testing though

6) Always a good idea if draining down

 

[Dan Robinson]

Sounds to me like the second company is as inept as the first.

 

[ReganAndCarter]

Second company knows how to charge. About all they do know. Great boiler, cowboy installer. Shame you didn't get a trusted local installer from Intergas to size boiler and install properly.

 

[heatservice]

Did you not get any type of guarantee/warrenty from the installers, TRV's are a good idea but are not mandatory since some muppets in our government removed the requirement from Part L of the building regs in 2006.

 

[Nintendofan]

Second company knows how to charge. About all they do know. Great boiler, cowboy installer. Shame you didn't get a trusted local installer from Intergas to size boiler and install properly.

STL are Intergas installers, they come and quoted for me last month but come back some silly amount so I told them I wasn't interested, been pestering me via text ever since, seems like a lucky escape for me.

 

[Razor900]

The flue can be screwed or not Intergas don't mind

If the flow and return temps are that close and most of the system is cold it's not an indication of an oversized boiler. It shows that the water is 'short circuiting' somewhere and returning to the boiler rather than circulating round the system. You need to see if any rad is getting hot and turn that down or check that any system bypass isn't wide open.

Yes the boiler is well oversized but it will fire then drop to low output and only ramp up to suit the system. Oversizing will only cause an issue when the system is up to temp

Some pictures would help

 

[muggles]

The flue can be screwed or not Intergas don't mind

If the flow and return temps are that close and most of the system is cold it's not an indication of an oversized boiler. It shows that the water is 'short circuiting' somewhere and returning to the boiler rather than circulating round the system. You need to see if any rad is getting hot and turn that down or check that any system bypass isn't wide open.

Yes the boiler is well oversized but it will fire then drop to low output and only ramp up to suit the system. Oversizing will only cause an issue when the system is up to temp

Some pictures would help

I stand corrected

 

[Dan Robinson]

I stand corrected

Nowt like a change of mind eh definite no no when I last asked.

 

[Razor900]

Nowt like a change of mind eh definite no no when I last asked.

I asked DS directly and the official answer was 'I don't mind if you do!!!'

I guess that's the official answer

 

[Dan Robinson]

I asked DS directly and the official answer was 'I don't mind if you do!!!'

I guess that's the official answer

Can you ask him nicely to reply to my last email .... Could cost me a couple of grand and three big installations if he doesn't

 

[ajstoneservices]

Do you need a flue starter for a vertical flue on the eco rf? @ Dan, Razor?

 

[Dan Robinson]

Comes with the terminal .

 

[ajstoneservices]

Thanks Dan.

 

[Dan Robinson]

No worries