Drayton Wiser oil heating

[ub7rm]

I'm considering adding the Drayton wiser system to replace the typical programmer with manual thermostat \ trv set up but someone mentioned on a different post that oil boilers tend to pull more current than gas boilers and cited this as a reason for premature failure of a programmer.

The switching capacity of the hub is 2 amps. The fuse protecting boiler, valves and pump is 5 amps.

My question is what does the hub or programmer actually switch? Is it just power to a valve which in turn switches the rest of does it see the full load current of the system.

It's a boulter camray 5 with Ch pump and 2 motorised valves. I asked Drayton and they said it was fine with oil fired systems but switching capacity was 2 amps.

 

[flameport]

On most, the programmer or thermostat switches power to the valve motor, and when open a switch in the valve signals the boiler to operate, or on some boilers switches the actual power for the boiler, pump, etc.

However the 5A fuse means nothing - what matters is the actual current for the boiler and other devices. It won't be anywhere near 5A.

 

[ianmcd]

The drayton will be fine with your system it is only powering the motors on the valves the rest is controlled by the end switches on the valves