Wireless Replacement for Randal 103
- Thread starter thomooseg
- Start date
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WTF 
I must be missing something here...
The 103 IS suitable! It turns on the heating and water at the same time, it doesn't control the pump, that'll be the job of the 2 or 3 port valve/s or the boiler (not sure if it has a pump overrun)
The 937 is NOT suitable as a direct replacement because it needs to sense room temperature and not boiler cupboard temperature! Also for the reason already mentioned by Mickyg.
If you want better control link the heating calling wire to permanent live behind the 103 so it only times the hot water, then fit the 937 where your current room stat is. You won't need the neutral any more.
I must be missing something here...The 103 IS suitable! It turns on the heating and water at the same time, it doesn't control the pump, that'll be the job of the 2 or 3 port valve/s or the boiler (not sure if it has a pump overrun)
The 937 is NOT suitable as a direct replacement because it needs to sense room temperature and not boiler cupboard temperature! Also for the reason already mentioned by Mickyg.
If you want better control link the heating calling wire to permanent live behind the 103 so it only times the hot water, then fit the 937 where your current room stat is. You won't need the neutral any more.
There's already a thermostat so it can be done how I describe above, can't it? I mean with a hard wired programmable stat, not a wireless one.
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I cant see anywhere the op has mentioned having a thermostat and this comment would suggest if he did it would be pointless or working incorrectly........
The second sentence on this thread.
sorry your gonna have to point it out! i dont see any mention of a currently installed thermostat only one the op installed somewhere else
haha no its me. i didnt see it. which begs the question wtf its doing ! doesnt really make sense
Yea something doesn't seem quite right...
OP, can you get hot water on it's own if you turn the thermostat right down?
OP, can you get hot water on it's own if you turn the thermostat right down?
yes thats what you might think, but the op has said the water wont work without heating and in the summer shuts it all down and uses the immersion heater !
After a discussion with the wife, we are just going to call a heating engineer (or three of them) and get quoted to update the system. We know it needs updating and our offer on the house was based on costing in a new boiler and radiators so we may as well do it now rather than wait. I am going to do a garage conversion and was planning to update the boiler at the same time as the new rooms will need radiators plumbed in.
On my last Combi boiler adding the Honewell was a piece of cake and I assumed it would be the same again but I was fooled. I never knew heating systems could be so complicated.
To everyone who has taken the time to reply than you for doing so and I have enjoyed reading your threads and learned loads. No doubt I will be back with more questions in the future.
On my last Combi boiler adding the Honewell was a piece of cake and I assumed it would be the same again but I was fooled. I never knew heating systems could be so complicated.
To everyone who has taken the time to reply than you for doing so and I have enjoyed reading your threads and learned loads. No doubt I will be back with more questions in the future.
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