New Boiler issues..

[MThomas]

Hello Everyone,

I had a new Navien boiler installed to replace and old gravity feed system and we have had nothing but problems with it. We had to install shutoffs at every rad to force the water to go through all the rads. The boiler keeps shutting down every week or two with an error 302-00 low water pressure. So I shut the power off and restart it and the water pressure is fine. One person suggested that because the pipes going to the rads is only 1/2" it needs to be changed to 3/4" pipe along with the rads. Having to replace all the piping and rads would be very expensive and I'm hoping it might be something else. Any suggestions would be greatly appreciated....

Thanks Mike

 

[cross thread]

What has it been converted to system boiler ,combi ? Certainly sounds like a circulation issue.

 

[Murdochcat]

What does to installer say? And what have they done post install?

 

[dilalio]

How have they filled in the benchmark commissioning page?
What did they put where it asks about radiators/system being properly balanced?

 

[dilalio]

Hello Everyone,

I had a new Navien boiler installed to replace and old gravity feed system and we have had nothing but problems with it. We had to install shutoffs at every rad to force the water to go through all the rads. The boiler keeps shutting down every week or two with an error 302-00 low water pressure. So I shut the power off and restart it and the water pressure is fine. One person suggested that because the pipes going to the rads is only 1/2" it needs to be changed to 3/4" pipe along with the rads. Having to replace all the piping and rads would be very expensive and I'm hoping it might be something else. Any suggestions would be greatly appreciated....

Thanks Mike

How many rads?
How old is the system?
Is it 15mm throughout even right near to boiler?

 

[CountryFan]

Contact the installer or Navien?

 

[dilalio]

Boiler slingers?

 

[polesapart]

Note OP's location..

 

[dilalio]

Note OP's location..

FFS!

 

[MThomas]

How many rads?
How old is the system?
Is it 15mm throughout even right near to boiler?

8 rads on the main floor and 4 rads in the basement, system was probably built in the 1950's or 60's. That main pipes are all 1 inch and where they branch off they are 1/2 inch.

 

[dilalio]

1 pipe system?

 

[MThomas]

1 pipe system?

Yes

 

[MThomas]

Yes

With shut off valve between each rad to force the water through the rads, they are about half closed...

 

[dilalio]

Never going to work properly ime.
How are the rads piped up TBOE?

 

[fixitflav]

Never going to work properly ime.
How are the rads piped up TBOE?

Agreed, a lot more thought should have gone into how best to incorporate a new boiler/pump.