- Joined
- 29 Jan 2010
- Messages
- 28
- Reaction score
- 1
- Country
Hi Everyone
First post on this forum . There seems to be some very knowledgable posters, so here goes.....
I have recently had a new heating system installed, and have just got a 2 channel programmer fitted, as I was advised I needed this to give me full control of my system. It's wet underfloor downstairs and radiators upstairs. There is a 2-way motorised valve for the radiators. The boiler is a gas combi.
The UFH (under floor) side of the system is controlled by the hot water side of the programmer. This seems to work ok. When the UFH thermostats are satisfied for heat the boiler is basically off, ie no burner light is on and the central heating light off. When a thermostat requres heat the boiler fires up as expected.
The central heating side of the programmer controls the radiators. I have a room thermostat upstairs. If the radiators are time programmed to be off, and the room thermostat is set higher than the current room temp, the boiler will run with the central heating light on and the burner will run periodically.
It seems that the room thermostat is over-riding the time on the programmer. It is making the boiler fire even though the programmer says the radiators should be off. The radiators don't come on however, as the motorised valve stays closed. It looks like the central heating side of the programmer is controlling the motorised valve only and not the boiler function.
As I only need a couple of hours of radiator heat upstairs during the day it seems very wasteful that the boiler should keep running based on the upstairs room stat reading.
Does this sound normal? I would of thought that the programmer should switch the boiler off period, and the upstairs room stat should only come into play during the radiators programmed 'on time.'
Can anyone sort this one out for me? Sorry this is a bit long winded
Cheers, Andy
First post on this forum . There seems to be some very knowledgable posters, so here goes.....
I have recently had a new heating system installed, and have just got a 2 channel programmer fitted, as I was advised I needed this to give me full control of my system. It's wet underfloor downstairs and radiators upstairs. There is a 2-way motorised valve for the radiators. The boiler is a gas combi.
The UFH (under floor) side of the system is controlled by the hot water side of the programmer. This seems to work ok. When the UFH thermostats are satisfied for heat the boiler is basically off, ie no burner light is on and the central heating light off. When a thermostat requres heat the boiler fires up as expected.
The central heating side of the programmer controls the radiators. I have a room thermostat upstairs. If the radiators are time programmed to be off, and the room thermostat is set higher than the current room temp, the boiler will run with the central heating light on and the burner will run periodically.
It seems that the room thermostat is over-riding the time on the programmer. It is making the boiler fire even though the programmer says the radiators should be off. The radiators don't come on however, as the motorised valve stays closed. It looks like the central heating side of the programmer is controlling the motorised valve only and not the boiler function.
As I only need a couple of hours of radiator heat upstairs during the day it seems very wasteful that the boiler should keep running based on the upstairs room stat reading.
Does this sound normal? I would of thought that the programmer should switch the boiler off period, and the upstairs room stat should only come into play during the radiators programmed 'on time.'
Can anyone sort this one out for me? Sorry this is a bit long winded
Cheers, Andy