HJelp with wiring up a central heating timer

[chriz1]

Hi i have a new Central Heating timer that i need a little help with on how to wire it up,
This is what it says on how to wire it

N L 1 2 3 4

Mains Fused HW OFF CH OFF HW ON CH ON

Any ideas?
Thanks

[chriz1]

im not sure what valves i got or how many all i know is this system is about 40 years old

[chriz1]

thanks will try it now