Digital Aquatics SW5 Question

[Bubba30]

Does anyone use a DA SW5 module? It has 4 switch ports and a relay for 120v 3a. I'm wondering how I'd wire the relay as it says not to run power directly through the relay. I'm looking to set up 4 float switches, a heater, three pumps (one for new SW and one of ATO), finally a solenoid for RO/DI reservoir. It would save me an outlet on the PC4 if I could wire the solenoid through the relay.

 

Any advice/info is appreciated. I've got the RK Lite purchased but don't have any modules yet.