I have a Vaillant Ecotec 415 Plus system boiler installed a few years ago. Originally it was an open vented system, but I have recently done a renovation and made the central heating a sealed pressurised system with an external expansion vessel replacing the expansion tank.
Ever since the boiler has been installed, when the central heating fires up, there seems to be a lot of water being discharged out of the condensate pipe for a minute or so. Is this normal?
Also, perhaps related to the water discharge, in the top most radiators in the house, some air seems to become gathered, to the extent that I can hear air bubbling up in the radiator when a heating cycle starts.
Given the old expansion tank was relatively low, just about 2 meters above the topmost radiators, I thought air may be coming back into the system through the pressure overflow pipe that fed back into the old expansion tank. Which is one of the reasons why I made the central heating system a closed pressurised system. But even now, air still seems to get into the system and travels to the topmost radiator.
The system also as an automatic air vent in the pipework just above the boiler, that was replaced with a new one when the boiler was installed.
I’m having difficulty finding anything on the internet related to this problem. So I would be grateful if someone could provide some advice on what the problem may be, and how to resolve it.
My feeling is that the water discharge and air coming into the system are related and are due to the way the boiler has been installed.
Any advice would be greatly appreciated.
Ever since the boiler has been installed, when the central heating fires up, there seems to be a lot of water being discharged out of the condensate pipe for a minute or so. Is this normal?
Also, perhaps related to the water discharge, in the top most radiators in the house, some air seems to become gathered, to the extent that I can hear air bubbling up in the radiator when a heating cycle starts.
Given the old expansion tank was relatively low, just about 2 meters above the topmost radiators, I thought air may be coming back into the system through the pressure overflow pipe that fed back into the old expansion tank. Which is one of the reasons why I made the central heating system a closed pressurised system. But even now, air still seems to get into the system and travels to the topmost radiator.
The system also as an automatic air vent in the pipework just above the boiler, that was replaced with a new one when the boiler was installed.
I’m having difficulty finding anything on the internet related to this problem. So I would be grateful if someone could provide some advice on what the problem may be, and how to resolve it.
My feeling is that the water discharge and air coming into the system are related and are due to the way the boiler has been installed.
Any advice would be greatly appreciated.
