Honeywell ST9400C installing

[rebelbuttmunch]

Hi
Ive a really old timer that I want to replace. Looking at the timer now I can see that the power goes in on one wire and goes out to the boiler on the other wire. Straightforward.

I want to replace it with a Honeywell STC9400C but I can't figure out where the wires should leave to the boiler.
I can see E N L 1 2 3 4 on the plate

So going is is Earth Neutral and Live, simple, but what numbers should I use to power my boiler?
According to the plate
1-HW OFF
2-CH OFF
3-HW ON
4-CH ON

Thats 4 wires, I only have one cable going into the boiler!

Any ideas?
Thanks!

 

[martinxxxxxx]

The timer you have purchased is to control a heating system, which is a bit of an overkill for what you need but. If you just want to switch a boiler with it. put the earth to the earth , neutral to neutral and live to the boiler to the HW On output. The whole lot should be fed from a 3a FCU

 

[rebelbuttmunch]

The timer you have purchased is to control a heating system, which is a bit of an overkill for what you need but. If you just want to switch a boiler with it. put the earth to the earth , neutral to neutral and live to the boiler to the HW On output. The whole lot should be fed from a 3a FCU

Thanks Martin. i'm only getting back around to this now. Flooring had my priority for a while

Does this "and live to the boiler to the HW On output" mean that I should just use a small piece of cable to loop them together?