Bought Used Pentair Intellitouch But Missing Things. What Else Will I Need?

[bejpool]

Hi all-

I just purchased a slightly used Pentair Intellitouch i9+3 control system and load center off of Craigslist for $500. It looks like everything is there inside: (relays, breakers, etc) except the valve actuators or temp sensors. I figure that I still walked away with a good deal and the actuators, sensors don't cost that much.

My pool and spa has shared equipment and an Intelliflo VF pump. What I'd like to do is control my gas heater and three valves: 1 three way valve for pool/spa suction, 1 three way valve for the pool/spa return, and 1 three way valve for a heater bypass valve. (I piped in an exterior bypass with a three way valve because I get much better flow/lower pump speed without the water going through the heater exchanger when the heater isn't used...that, and I figure the heat exchanger will last longer that way too.)

In other words, when I want to use the spa, I hit "SPA" mode on the indoor control panel, and the 3 way valves switch from pool/spa to spa, and the heater bypass valve open and the heater fires up when flow is made. Is this possible to do?

I'd also like to also be able to control/monitor the system via my Mac or phone, so would I need Screenlogic for that?

[Pool Clown]

You should be able to do that. Does the filter pump also operate the spa jets? You shouldn't need to run the pump so high that the heater would affect flow. Not to drone on, but the energy saving idea of that pump is so you can run it low, not high, unless you needed high flow for say, the jets, or perhaps to send water to the roof for solar heat.

[Pool fx]

Yes you are on the right track. Everything you mentioned will work just as you planned. With that variable flow pump you want to set the spa flow "while heating" a lot slower than full blast. The slower you can get the water to go through heater while still making enough pressure to engage pressure swith the fast the spa heats up. Then once the spa is hot and you are ready to get in you will have another button programmed such as air blower. When you push air blower the variable speed can hit full blast also to ensure great jet action!