What would you recommend and could I change it?
Heating Timer
- Thread starter NewhouseOldhouse
- Start date
What would you recommend and could I change it?
What would you recommend and could I change it?
your new time switch will only control the heating if you have gravity HW it wont control the HW, what exactly are you hoping to do ?
I can only see in the photo a Sangamo 7 day time clock which is set to come on and go off early morning, then the same again in the evening. There could be absolutely anything attached to it, including electric heaters.
D
Deleted member 267285
Nope no ideas, only clue I have is the x2 cables underneath.
Was looking to have an easier programmer and to a have the ability to set it on for block days as in Mon to Fri - Sat to Sun different times as it now will come on same time everyday
D
Deleted member 267285
What about your hot water, how is that currently controlled?
It heats when the heating is on and I have an immersion heater too which I don't use much, I also have a open fire back boiler to heat rads and water
I noticed those cables, but there was no certainty that they had anything all to do with the time clock.. The cables exiting the time clock, go through the rear.
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Is it a DIY job to change, yes it simply pulls out and you plug in replacement, no wiring required. Is there a more modern version, again yes, would it be easy to upgrade to more modern, now that is the big question.
It seems to be a simple 7 day on/off twice a day, but those units could handle 16 amp in some of the versions, and even had year compensation types, so with a modern version then the question is how many amp is it switching?
For central heating in the main we have moved to the programmable thermostat rather than separate thermostat and timer. I swapped from something similar in three different houses,
this was the first house, worked well, hard wired, 
second house a failure, it lost its RF link after around 6 months of use, and caused the heating to remain on, it did have option of either 5 + 2 or 7 independent days, and last one 
easier to list what Nest gen 3 will not do, rather than what it will do. 
but all were better than the original time clock. So what do you want it to do? The advantage with Nest was you have two change over contacts one for domestic hot water and one for central heating and it can be wired how you want it, be it extra low voltage, or low voltage, and you can use with thermo syphon DHW without any tank thermostat or motorised valve, nothing is pre-wired, you can do what you want.
With Hive for example the twin channel you can only use it with a low voltage (230 volt) control, which actually would have worked with my oil boiler, but also line in is hard wired to common of the DHW where with Nest I am using the Com as line out, not line in.
Even with thermo syphon you can still have a motorised valve on the DHW and a tank thermostat, but in my case there is no tank stat it is controlled purely by time. Neither was there a motorised valve on the CH to start with, that was added latter, it turned the CH on by running the pump, note it turned it on by running pump not off, as once circulation started thermo syphon would take over.
Modern boilers have a cool down time, old boilers relied on the thermo syphon to cool them, so some times it is not practical to fit a motorised valve on the DHW.
So start again saying exactly what you want, and what you have so a table like this:-
5+2 day control or 7 independent day control.
Includes thermostat, or thermostat independent.
To link to TRV or use in open plan house.
Now what you have:-
24VAC, 24VDC or 230VAC control system.
Pump part of boiler, or outside the boiler.
If outside supplied from boiler or external controls.
Has it got motorised valves, if so are there for CH or DHW or both, are they 2 port or 3 port.
Has it got a tank thermostat.
Has it got a room thermostat.
Are there any TRV (thermostatic radiator valves) fitted.
Bonus is make and model of boiler, and photographs. When I moved into this house, to get main house CH to work, I had to go outside, down a flight of steps and into the granny flat under the house and plug in the CH pump. Some systems are very basic, my programmer was marked DHW + CH once or twice a day, or DHW only once of twice a day, Off or continuous. However in real terms, it just turned whole lot on once or twice a day, to select CH on/off it was a walk outside.
So we can only work with what you tell us, pictures are good, and remember even if you have said some thing before, repeat it as people tend not to scroll back through all the posts. You could have that old timer of mine it will only go in the bin, but to be frank rather too basic for use today.
It seems to be a simple 7 day on/off twice a day, but those units could handle 16 amp in some of the versions, and even had year compensation types, so with a modern version then the question is how many amp is it switching?
For central heating in the main we have moved to the programmable thermostat rather than separate thermostat and timer. I swapped from something similar in three different houses,
this was the first house, worked well, hard wired, second house a failure, it lost its RF link after around 6 months of use, and caused the heating to remain on, it did have option of either 5 + 2 or 7 independent days, and last one easier to list what Nest gen 3 will not do, rather than what it will do. but all were better than the original time clock. So what do you want it to do? The advantage with Nest was you have two change over contacts one for domestic hot water and one for central heating and it can be wired how you want it, be it extra low voltage, or low voltage, and you can use with thermo syphon DHW without any tank thermostat or motorised valve, nothing is pre-wired, you can do what you want.With Hive for example the twin channel you can only use it with a low voltage (230 volt) control, which actually would have worked with my oil boiler, but also line in is hard wired to common of the DHW where with Nest I am using the Com as line out, not line in.
Even with thermo syphon you can still have a motorised valve on the DHW and a tank thermostat, but in my case there is no tank stat it is controlled purely by time. Neither was there a motorised valve on the CH to start with, that was added latter, it turned the CH on by running the pump, note it turned it on by running pump not off, as once circulation started thermo syphon would take over.
Modern boilers have a cool down time, old boilers relied on the thermo syphon to cool them, so some times it is not practical to fit a motorised valve on the DHW.
So start again saying exactly what you want, and what you have so a table like this:-
5+2 day control or 7 independent day control.
Includes thermostat, or thermostat independent.
To link to TRV or use in open plan house.
Now what you have:-
24VAC, 24VDC or 230VAC control system.
Pump part of boiler, or outside the boiler.
If outside supplied from boiler or external controls.
Has it got motorised valves, if so are there for CH or DHW or both, are they 2 port or 3 port.
Has it got a tank thermostat.
Has it got a room thermostat.
Are there any TRV (thermostatic radiator valves) fitted.
Bonus is make and model of boiler, and photographs. When I moved into this house, to get main house CH to work, I had to go outside, down a flight of steps and into the granny flat under the house and plug in the CH pump. Some systems are very basic, my programmer was marked DHW + CH once or twice a day, or DHW only once of twice a day, Off or continuous. However in real terms, it just turned whole lot on once or twice a day, to select CH on/off it was a walk outside.
So we can only work with what you tell us, pictures are good, and remember even if you have said some thing before, repeat it as people tend not to scroll back through all the posts. You could have that old timer of mine it will only go in the bin, but to be frank rather too basic for use today.
You crack me up
You make assumptions..
well who was correct ?
We still don't know for certain..
I lesson I learned long ago, was not to rely on guess work, without confirming my guesswork was correct.
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