Advice Identifying Central Heating Programmer

[600rob]

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

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• 600rob
• 13 Jan 2015
• 1

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

 

[Dan Robinson]

It is a ST699

 

[600rob]

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

 

[45yearsagasman]

Fitting a new 699 is simple, but changing for another make/model will require a rewire of the back plate.

 

[St0rmer66]

I believe the ST799 uses the exact same back plate and wiring so is a 30 second job to swap over.

 

[600rob]

Cheers all.

I might go for an st799 in that case.