Advice Identifying Central Heating Programmer

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Location
Middlesex
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United Kingdom
I would like to replace the old heating control unit and thermostat on my CH/HW system
The system is a fully pumped honeywell s plan and the control unit and thermostat looks like the image below


There are no markings on the component so im not exactly sure which honeywell models it is in order for me to identify a suitable replacement from honeywell.

The part i currently have is probably about 25-30 years old ( about same age as the property)

I think i may have identified the programmer to this one HERE

Can anyone tell me if i have managed to identify the correct item?

Any advice is greatly appreciated
 
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Thanks Dan.


Would it be fairly easy to replace using an ST799 ( 7 day timer) instead of an ST699 ( 1 day timer) so i could get more flexibility with programming times and would i need to replace any additional parts?

Cheers
Rob
 
Fitting a new 699 is simple, but changing for another make/model will require a rewire of the back plate.
 
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I believe the ST799 uses the exact same back plate and wiring so is a 30 second job to swap over.
 

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