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rash_decision

Original Poster:

1,029 posts

57 months

[news] 
Thursday 25th November 2010 quote quote all
Hi. I have a combi boiler in my house. I have the pressure between 1.3 and 1.5 Bar. I don't have a room thermostat and only control the temperature via the control on the boiler, which I have no issue with. My problem is that the dial for the central heating temperature goes up to number 7. But I cannot have it any higher that 4.5 (giving me 55/56 degrees according to the temperature gauge) otherwise the pressure increases above the 3 Bar relief!! The house is warm enough but this morning I felt like giving the house a good roasting!! Is it safe to run a lower pressure as long as the heating is at a higher setting, thus keeping the pressure up??

Ferg

15,242 posts

137 months

[news] 
Thursday 25th November 2010 quote quote all
There isn't enough expansion in the pressure vessel. Either it's lost it's charge, is fked, or you have an enormous system.
Drop the pressure from the system, then test the pre-charge on the vessel with a tyre pressure gauge. It should be reachable from above, normally. You need 1 Bar really. Pump it up with a bike pump if necessary.

Edited by Ferg on Thursday 25th November 19:36

rash_decision

Original Poster:

1,029 posts

57 months

[news] 
Thursday 25th November 2010 quote quote all
Cheers Ferg. I'll give it a go in the morning. The boiler is only 3 years old so hopefully it's not fecked and only needs re-charging.

Ferg

15,242 posts

137 months

[news] 
Thursday 25th November 2010 quote quote all
rash_decision said:
Cheers Ferg. I'll give it a go in the morning. The boiler is only 3 years old so hopefully it's not fecked and only needs re-charging.
Those vessels can be a bit st. You are definitely getting too big a pressure increase.

rash_decision

Original Poster:

1,029 posts

57 months

[news] 
Thursday 25th November 2010 quote quote all
Ferg said:
rash_decision said:
Cheers Ferg. I'll give it a go in the morning. The boiler is only 3 years old so hopefully it's not fecked and only needs re-charging.
Those vessels can be a bit st. You are definitely getting too big a pressure increase.
Can the vessel be replaced or could I potentially be looking to replace the whole boiler???
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Ferg

15,242 posts

137 months

[news] 
Thursday 25th November 2010 quote quote all
rash_decision said:
Ferg said:
rash_decision said:
Cheers Ferg. I'll give it a go in the morning. The boiler is only 3 years old so hopefully it's not fecked and only needs re-charging.
Those vessels can be a bit st. You are definitely getting too big a pressure increase.
Can the vessel be replaced or could I potentially be looking to replace the whole boiler???
You can replace them, but we often cap them and put one remotely on the system. It's easier sometimes.
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