I have just fitted a wireless stat. to my y plan system however it is fed via a acl switchmaster 400 which means the stat. is only on when timed is on or when on constant. However this means the hot water is always on with it because you can not have heating on without water. Do I need to get a new programmer with CH on and HW on or can I just control the water through the programmer and take a perm. feed to wireless stat. to control 3 port valve. Thanks for any info.[/u]