I'm having issues,

I want to replace my old thermostat for this digital one however, I'm not sure on the wiring.

On the Nordyn I had,

Y
G
R
O
C
W2 jumpered with E

Following the instructions I wired it the following (I removed Jumper from RH to RC)
Y to Y1
G to G
R to RH
O to Y/O
C is taped up and not used
W2 to W/B
Space RC is not used

This did nothing, nothing turned on when I set the system to Cool and the Fan to auto and set the temp 5degrees cooler. I waited 10mins just in case of the delay but nothing so this has to be wrong.

All answers really appriciated!

Put jumper from RH to RC .

Now is this all I need to do? Everything else is wired up right?

Yes

http://www.hardwarestore.com/media/pdf-misc/603274.pdf


Two stage heating
Look on the back of the hunter thermostat and you will see a switch that will say std or HP. Switch it to STD. all should work well now