Drayton Lifestyle LP522, can I add a thermostat

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Hi,
I just moved into a new house which has a Drayton Lifestyle LP522 dual channel programmer on an oil combi boiler (The hot water is just set to always on). I can't find any information on how to add a thermostat to the CH though I think it should be possible. I acquired a Nest Thermostat E (for free) that I would like to use.

Longer term, once I have some spare cash I would like to replace the programmer with a Tado or some such but for now just getting the Nest E working would be a bonus as it would stop the heating coming on when we have the wood burner fired up!

Any help greatly appreciated
 
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Consult the Manufacturer's Instruction for your boiler and you will see the necexxary information for installing a thermostat.
 
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Provided that your boiler is suitable, from a wiring point of view the LP522 is a simple on/off switch, so is the Nest-e. You would simply be replacing one on/off switch with another on/off switch.

The only difference I can see is that the LP522 would be 'on' for longer sustained periods of time, but the Nest-e would switch 'on' and 'off' more frequently to maintain the set temperature. Not a problem for a gas boiler but maybe it is for an oil boiler, so perhaps why @oilhead is suggesting you check the manual.

Assuming it is OK probably the easiest way to DIY install the Nest-e is as follows:

If you remove the LP522 the backplate wiring terminals are:

LP522.png


1. Run a new cable from the LP522 to the Nest-e receiver and connect one of the wires to the Nest-e receiver 'NO' terminal and another to the 'C' terminal
2. Remove the existing wire from terminal '4' of the LP522 and connect / join it to the wire going to Nest-e 'NO'
3. Connect the wire from Nest-e 'C' to the now vacant terminal '4' of the LP522

You would then control the heating via the Nest-e, [Nest-e has time and temperature control in the single unit] and as per the hot water, the central heating should be set to be permanently 'on' at the LP522. Allowing the Nest-e to take full control.

A professional would remove the LP522, but this would involve more wiring changes, so if you don't mind leaving it in situ this is the easiest way.
 
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Perfect @stem exactly what I was looking for. Once we have the rest of the house done I will properly upgrade the system and get rid of the lp522 for good but this is just an in-situ upgrade. I can't see the boiler caring too too much, can't be any worse than the kids turning the hot tap on/off all day.

edit. quick look in the boiler install manual says it should be used with a timer or thermostat.
 
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Any thermostat you choose , simple wires in series with the CH call for heat from the LP522, nothing hard about it, if you want to use nest E just set the CH to always on at the LP522 and the nest E will control the heating function at the boiler end
 

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