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Central heating thermostats.
KILTY:
Not cost effective-you would have to alter the pipework and seperate the two loops/areas you want to control,fitting an electric zoning/control valve on each one - controled by your thermostats
The "best practice" is to fit thermostatic radiator valves to all but one rad - eg - hall and fit a room thermostat in that area to act as a maximum temperature/boiler interlock - and turn down the areas you dont use
Lyndsey731:
ok first of all forget the two stat thing, without two loops of pipe its not happening :cry:
What you could do is a mix of all the comments so far:-
Leave the stat where it is set to say 19 turn all the TRV's downstairs right down, if you dont have TRV's just shut the valves down quite far it wont directly control the temp but it will send the hot water off elsewhere (path of least resistance).
Make sure your bedroom and the bathroom have no TRV fitted or are fully open, you must keep an open circuit or you will blow the system.
Next set the boiler out put temperature to level which gives you a comfortable level of heating in the bed and bathroom.
What should happen is that the stat will always be calling for heat, the downstairs rads will give out a little heat whilst most will go to upstairs to the bed and bathroom but when the return water temperature at the boiler hits the boiler output temp it will turn the boiler off. Once the return temp drops the boiler will fire back up.
Not the best solution but to be honest the only way i can think of with your set up.
As for turning on when it's very cold you will need a frost stat that someone mentioned they had in their garage earlier.
TBH in my opinion still cheaper to get a panel rad :lol:
Good luck
Edit: god my typing is getting slower, apologies!
Gav
muddyjames:
just had a whacky thought. how about I move the stat to my bedroom? 1 stat just instead of being in the coldest part of my house it is in my room?
BigSi:
Basically you need to have your heating system separated in to zones. Adding another room stat in parallel, will only bring in the central heating side of the system when the first room stat drops below its temperature setting. Remember a room stat is only an on/off switch. You would also have a cylinder stat that would operate to give you hot water.
Also remember that any electrical work you do, might be classified under Part P of the building regs. Unless your registered, you have to notify the LABC of any proposed electrical work (ie running a new circuit). My advice, get an electrician as any work done needs to be tested and certified.
Bathrooms are classified as special locations, so ANY electrical work in this area (ie fitting a towel rail), is notifiable under Part P of the building regulations. This also includes kitchens and the outdoors.
If the room stats are wired in series then when the first one reaches its min temperature setting it can only operate the boiler if the second stat is also closed.
If wired in Parallel, as soon as either stat falls below its min temperature setting, the circuit will close brining in the boiler. The problem with this, is that it would also energize both side of the second room stat. And if both areas are cold to start with, then the boiler would not turn off until the largest area is heated (unless this stat is turned right down), regardless if the smallest are has reached its temperature or not.
I’m no plumber, but its Thermostatic rad valves that you need.
Somebody can tell me to shut up now!!!!!!!!! :lol: :lol: :lol: :lol: :lol:
MuddyMike:
Okay. as far as I can see your plan would work.
First check if the thermostat has three wires or two (excluding earth)
Second buy thermostat with same wiring.
Extend wires from existing stat to new stat wiring everything in parallel
Now you are set.
Situation one. You are home alone.
Turn downstairs stat to low, turn off downstairs rads, turn bedroom stat to required temp, turn bedroom rad (and towel rail once fitted) on.
Result. Boiler will run when heat is demanded by bedroom stat, bedroom and towel rail will be warm, other rooms will be cool.
Situation two. You invite Mud Clubbers to stay.
Turn downstairs stat up, turn rads in required rooms on.
Result. Boiler will run when heat called for by downstairs stat, all rads that are turned on will get hot.
I would recommend a time controlled thermostat, you can then pre set different temperatures for different days/times of day. Good investment at about 21quid.
As for the legalities of doing this yourself, I am no expert in part P but if you are allowed to DIY a spur socket, this must also be allowed.
Mike
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