hkching,
Thats where you went wrong, you should have set to H as you are using your MH to heat your water. Your time delay is correct.
Leave your COR alone unless you know how to calibrate your probe (quite simple actually, remember the triple point of water?).
For use of delta, see the this example for Heater Function:
Set Temp at 27
Delta at 1
At 28 power to device cut
At 26 power to device resume
hkching, your wiring is also wrong!!!
Why is it blue and brown going to your 9 and 10??? Is your blue your live wire? If you understood my instruction, it should be brown in 9, brown out 10. Blue is never used. Remember, your controller does not supply power to your device. It merely acts as a switch.
Is this better? You got to follow instructions clearly and read carefully.