I had a Aqualink Z4 installed with my new pool and spa. The pool has its own loop with a Jandy VS pump. The spa has its own loop with a VS pump and Jandy heater. My pool guy made me believe I was getting the Cadillac of controls, and did not give me any options for better. I was not satisfied with the controls so I am trying to improve them. neither vs pump was 4 wired to the controller. The heater is 2 wired. The Z4 thinks the heater is a pool heater. I can't figure out how to change it to spa. I 4 wired the spa pump to the Z4 and swapped load leads between the 2 VS pumps. So now everything kinda works, I just have to pretend the spa is the pool. I would love to have the pump speed change when I turn on the heater. I haven't been able to make the 4 wire to the heater work, so I went back to 2 wire. Is my Z4 not capable or am I just missing something?