changing an analogue central heating timer for a digital one

[scfc151]

I currently have a potterton prima 50b boiler with a danfoss ranfall 103 timer,

Is it possible to change this for a digital one to get more control?

Cheers

 

[cross thread]

you can get a 103 digital thats a straight swap on the same back plate,but that will only give more accurate times,without knowing the other sytem controls etc we cant say what will improve the efficanncy of your system

 

[45yearsagasman]

Yes, you can get the electronic version of the 103 and it uses the same back plate.

 

[scfc151]

thanks for the replys I dont have very good control over the heating system other than the boiler thermostat and trvs.

The main reason I wanted the anaolgue timer is because i can only have it comming on or off twice a day and the minimum time is around 2 hours (when both tabs are as close to each other as possible).

 

[D_Hailsham]

I don't have very good control over the heating system other than the boiler thermostat and trvs.

The 103 is a single channel timer, which suggests that you have a pumped heating/gravity hot water system. Is this correct? If so, how is the hot water temperature controlled?

If the only controls you have are the boiler thermostat and TRVs, changing the timer on its own will not give you any better control. You need to have a room thermostat, cylinder thermostat and motorized valves to make any noticeable difference. Ideally you should convert the system to fully pumped.