Thermostat for a potterton boiler
Discussion
Hello!
Our potterton boiler is contolled by a simple timer which is based on a balanced system. For one reason or another it seems to heat the house up very quickly. I am looking to install a thermostat so that I can leave the heating on all day and have various temprature levels for certain times, is it a simple case of fitting thermostat between the timer and the boiler to control it firing up.
It there a simpler way of do this?
Cheers in advance, if anyone could recommend a box that does this that would be great.
Alex
Our potterton boiler is contolled by a simple timer which is based on a balanced system. For one reason or another it seems to heat the house up very quickly. I am looking to install a thermostat so that I can leave the heating on all day and have various temprature levels for certain times, is it a simple case of fitting thermostat between the timer and the boiler to control it firing up.
It there a simpler way of do this?
Cheers in advance, if anyone could recommend a box that does this that would be great.
Alex
ALawson said:
Ferg the Potterton Boiler is a Kingfisher its currently controlled by a EP2000 timer thing. We only have about 7 rads running of it.
Ha, I had a Potterton EP2000 until last year and replaced it with a Honeywell - it doesn't have any more functionality though, but being being smaller it fitted in the cabinet!NB I've met Ferg and he doesn't look anything like a kingfisher
Ferg said:
Need to know much more about the system. Fitting a room thermostat isn't difficult, but to zone it as above would be between 'difficult' and 'impossible'.
One possibility would be to use a room thermostat to control the boiler and thermostat radiator valves elsewhere. You should always have at least one non thermostatic radiator valve (definately in the roon with the boiler thermostat) to protect the boiler from damage. I've had this arrangement in my last two houses and it seems to work well.ALawson said:
Simpo which Honeywell did you get? Have you just set the temp to say 18 Deg C and left it to do its stuff?
It was an ST799: www.plumbworld.co.uk/honeywell-st799-7-day-760-166...I set the house temperature I want at any particular time on the room thermostat which is in the lounge. If I want the house a bit warmer I turn it up until it clicks, the boiler comes on (if it's set to be active at that time), and the house gets warmer
ETA: Note that the Honeywell jobbie is just a timer, not a thermostat - and if I understand you correctly, what you need is a thermostat. Doesn't your house have one? I think you need something like this: www.heatingcontrolsonline.co.uk/potterton-myson-pr... - but wait for someone like Ferg to confirm this before rushing out.
Edited by Simpo Two on Sunday 29th November 12:42
The essential differences to be careful of are whether it's fully pumped or not. Do you have motorised valves (2 x 2port or 1 x 3port)? If so then it's a simple job to wire a room thermostat so that it interupts the live from the programmer to the heating valve BROWN wire. If the cable runs are easy then it's a simple thermostat, if not then you may have to go wireless = More cash.
If it isn't fully pumped then you interupt the live to the pump. (Almost always)
The room thermostat should be in the space with most air changes e.g. hallway and shouldn't have a TRV on the radiator. Crank that rad down so that it gets hot last. The kingfisher should be able to cope without any other bypass arrangement.
If it isn't fully pumped then you interupt the live to the pump. (Almost always)
The room thermostat should be in the space with most air changes e.g. hallway and shouldn't have a TRV on the radiator. Crank that rad down so that it gets hot last. The kingfisher should be able to cope without any other bypass arrangement.
It would appear that when the controller is on for hot water only then the boiler just turns on for the required time, its inbuilt thermostat cuts it out when the hot water cylinder is the correct temp.
When the controller is on heating then it turns a remote pump on to pump the water around the rads.
In theory I would need something to control the kingfisher firing up when it drops below the required temprature and to make sure the pumps turns on.
Ferg, I may post a few pictures!
When the controller is on heating then it turns a remote pump on to pump the water around the rads.
In theory I would need something to control the kingfisher firing up when it drops below the required temprature and to make sure the pumps turns on.
Ferg, I may post a few pictures!
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