As a happy customer (using 12V models with Touchpad) http://www.heatmiser.co.uk/touchscreen.htm
do a 230V range and note that you could just get one with the two zones (PRT2-TS) and control your upstairs by the programmable downstairs!
Then just a regular timeclocks for the hot water.
are you using a Netmonitor+ for controlling your heating system remotely? I installed one and it is wired to the keypad but it it returning some weird sms massages and not changing the stat temperatures as instructed. The SMS commands in the manual are not very comprehensive either.