I am going to have to change out my intermatic timer pump timer soon. I have one hooked up to the pump and one to the booster pump for the cleaner. I do not care to have the booster pump on a timer that works as I only run it when I am around. So can I just switch out the pump timer and leave the other one as is? It seems to be a pretty quick swap. Is there anything special I need to know about it besides cut off the power to it when changing it? Is it something hard to do? It looks like basically swapping out a manual thermostat to a digital, just follow the wires. It is the one with a yellow face. Also if I did not want the pump to come on at my specified times, is there a way to do that?