replacing mechanical timer with electrical timer

[rach_17]

Hi everyone, hoping to benefit from your expertise!

We have an old mechanical timer, which controls (just about!) our gas-fired back boiler. We'd like to replace it with an swish electronic dual-control thingy, maybe a Danfoss FP715 - but I can't tell from their website whether you could use this one with an old conventional boiler like ours (don't know the make I'm afraid - suspect it's Potterton or similar). If I could use a new timer like the Danfoss FP715, how much work is it likely to be to install it? (I'm thinking qualified electrician here, not myself - but don't want to order an enormous/impossible job or be ripped off!) Would I need a whole new 'back plate' or whatever it's called?

Thanks

 

[ollski]

All depends what sort of system you have ie. Y plan, gravity and what time clock /programmer is operating it now.

 

[rach_17]

As I said, it's an old mechanical timer at the moment.

Don't know what Y plan means. It's a closed conventional boiler system, it has its own header tank and immersion heater.

If you tell me what Y plan means I can try and find out...

 

[DarkInferno]

what is the model number of the existing timeclock?

 

[rach_17]

It is a Switchmaster 805.
I reckon the boiler may well be a Baxi back boiler.

 

[ollski]

Can't see why not, they are both standard twin channel clocks, just replace the backing plate and swap the wires around and away you go.