X
Xad
I'll post the cliffnotes before as it turned into a somewhat long post:
* boiler died end of last year
* housing had everything replaced (regular boiler) this time last month (January). Baxi Solo 15HE installed.
* red expansion vessle/tank fitted (attic expansion tank shut off i think??)
* advised to check needle stays at between 1 and 2
* red needle was around 1.5 when on all this time, now it's at 3.5
* don't know where the black needle is supposed to be
* red needle was going down progressively when system turned off, from around 1 to 0.6 bit by bit
* photo below (i'll take another one what is happening during, missed that shot)
Details:
This is on behalf of my parents who live in a housing association home, and i don't know much when it comes to anything boiler related (although i'm pretty good with other tech stuff). Boiler died end of last year so this time last month everything was upgraded by housing: boiler, TRVs, valves, pumps, timer, thermostat.
I believe it's a conventional/regular system and before the red tank wasn't there so i'm guessing there was a secondary tank in the attic? Only ever saw the large water tank in the attic i'm guessing there was a smaller one behind for the heating.
Anyway, the red expansion tank was fitted with the new boiler, a Baxi Solo 15HE condensing boiler. Not many instructions were given after fitting however, the installer said that the pressure gauge should read somewhere between 1 and 2 when it's on. I'm not sure whether he meant the black arrow or the red one, and i only noticed the black one today, the red one however was around 1.5 when on, however, when it was off, it was steadily climbing down bit by bit.
I did bleed one radiator that keeps getting filled with air (in a house with 10 radiators which all work fine), so not sure if this is related to the red arrow going down. I did mention to the engineer that one radiator kept getting air in it, but he said it shouldn't be an issue any more as it was a sealed system, but it was still getting air in it.
Anyway, today i checked the gauge when it was off, and the red arrow is all the way across to 3 1/2 and the black one at i think 0.5? This is way higher than the 1.5 or so he advised. Is this dangerous? Could something explode? What caused the sudden jump? Is this an emergency situation that needs to be looked at immediately or not a big issue that could be ignored, or something that needs to be looked at but not dangerous? It wasn't like this yesterday and everything is brand new (apart from radiators themselves and cold water tank and hot water cylinder). Also, another thing to note, sometimes the radiators make a bang/crack noise when it starts up, maybe after 15/20 minutes. I read that the noise can sometimes be caused by "steam hammer" caused by air buildup in the radiators. Not sure if this could have caused this and whether its dangerous or not.
I left the heating and water on for an hour and everything works fine, below is a before and after photo (i'll get another one of during), and water/heating got hot, but the needles are still all over the place.
* boiler died end of last year
* housing had everything replaced (regular boiler) this time last month (January). Baxi Solo 15HE installed.
* red expansion vessle/tank fitted (attic expansion tank shut off i think??)
* advised to check needle stays at between 1 and 2
* red needle was around 1.5 when on all this time, now it's at 3.5
* don't know where the black needle is supposed to be
* red needle was going down progressively when system turned off, from around 1 to 0.6 bit by bit
* photo below (i'll take another one what is happening during, missed that shot)
Details:
This is on behalf of my parents who live in a housing association home, and i don't know much when it comes to anything boiler related (although i'm pretty good with other tech stuff). Boiler died end of last year so this time last month everything was upgraded by housing: boiler, TRVs, valves, pumps, timer, thermostat.
I believe it's a conventional/regular system and before the red tank wasn't there so i'm guessing there was a secondary tank in the attic? Only ever saw the large water tank in the attic i'm guessing there was a smaller one behind for the heating.
Anyway, the red expansion tank was fitted with the new boiler, a Baxi Solo 15HE condensing boiler. Not many instructions were given after fitting however, the installer said that the pressure gauge should read somewhere between 1 and 2 when it's on. I'm not sure whether he meant the black arrow or the red one, and i only noticed the black one today, the red one however was around 1.5 when on, however, when it was off, it was steadily climbing down bit by bit.
I did bleed one radiator that keeps getting filled with air (in a house with 10 radiators which all work fine), so not sure if this is related to the red arrow going down. I did mention to the engineer that one radiator kept getting air in it, but he said it shouldn't be an issue any more as it was a sealed system, but it was still getting air in it.
Anyway, today i checked the gauge when it was off, and the red arrow is all the way across to 3 1/2 and the black one at i think 0.5? This is way higher than the 1.5 or so he advised. Is this dangerous? Could something explode? What caused the sudden jump? Is this an emergency situation that needs to be looked at immediately or not a big issue that could be ignored, or something that needs to be looked at but not dangerous? It wasn't like this yesterday and everything is brand new (apart from radiators themselves and cold water tank and hot water cylinder). Also, another thing to note, sometimes the radiators make a bang/crack noise when it starts up, maybe after 15/20 minutes. I read that the noise can sometimes be caused by "steam hammer" caused by air buildup in the radiators. Not sure if this could have caused this and whether its dangerous or not.
I left the heating and water on for an hour and everything works fine, below is a before and after photo (i'll get another one of during), and water/heating got hot, but the needles are still all over the place.