Hi All,
The house we moved in to a year ago has a Vaillant Ecotec 428 fitted and I'm trying to get my head around how it works. This is my first time as a home owner and never lived in a property in which I've had access to the boiler until now, so trying to get my knowledge to where it should be!
The boiler runs through a UPS 15-60 pump and 3x CH zones (one of which is UFH with a separate UPS 25-60) plus the HW cylinder. I have the boiler HW temp set to 60 deg and the CH temp set to 75 deg (as I'm pretty sure was recommended in the manual or elsewhere). What is confusing me a little is the way the boiler is reacting in relation to the set temps.
The weather has (thankfully) been glorious as of late so the CH heating has been off (ie set low enough through our Tado that there is never any call for heat) yet when the Hortsman progammer (which all the Tado thermostats run through) has the HW channel ON in the morning and evening the boiler LCD displays both the radiator symbol (heating mode) and the tap (hot water supply). Why is the heating mode active when there is no call for heat from the CH side of the system?
What's more, when the HW is on, the boiler constantly goes through short cycles of heating up (heating mode) to 75 deg probably takes about 30 seconds with all the CH zone valves closed, flame turning off, heating then entering an anti-cycling mode (flashing radiator) until it gets down to around 70 deg (probably take 2 minutes) before repeating. Why is the boiler heating to the CH temp with no call for heat? Why is it not just maintaining the HW temperature? Should it he cycling on and off so short and repeatedly?
Thanks in advance for any help/advice you can provide!
The house we moved in to a year ago has a Vaillant Ecotec 428 fitted and I'm trying to get my head around how it works. This is my first time as a home owner and never lived in a property in which I've had access to the boiler until now, so trying to get my knowledge to where it should be!
The boiler runs through a UPS 15-60 pump and 3x CH zones (one of which is UFH with a separate UPS 25-60) plus the HW cylinder. I have the boiler HW temp set to 60 deg and the CH temp set to 75 deg (as I'm pretty sure was recommended in the manual or elsewhere). What is confusing me a little is the way the boiler is reacting in relation to the set temps.
The weather has (thankfully) been glorious as of late so the CH heating has been off (ie set low enough through our Tado that there is never any call for heat) yet when the Hortsman progammer (which all the Tado thermostats run through) has the HW channel ON in the morning and evening the boiler LCD displays both the radiator symbol (heating mode) and the tap (hot water supply). Why is the heating mode active when there is no call for heat from the CH side of the system?
What's more, when the HW is on, the boiler constantly goes through short cycles of heating up (heating mode) to 75 deg probably takes about 30 seconds with all the CH zone valves closed, flame turning off, heating then entering an anti-cycling mode (flashing radiator) until it gets down to around 70 deg (probably take 2 minutes) before repeating. Why is the boiler heating to the CH temp with no call for heat? Why is it not just maintaining the HW temperature? Should it he cycling on and off so short and repeatedly?
Thanks in advance for any help/advice you can provide!