I recently moved into a home with an in-ground spa, about 17 yrs old, in good working order. It has two pumps, one for jets and one for heater. The heater is a new Pentair MasterTemp. The heater and pumps are in an inconvenient location, so we want remote control. In addition, we want the ability to set it to run on a timer, mostly to avoid freezing.
(I understand routine running is also a good idea for circulation to keep water clean, but experience shows that the water stays in great shape without significant flow.)
The heater pump is 1/2HP on 220 VAC, same circuit as the heater. The jets pump is 2HP on a second 220 VAC circuit. The breaker panel is at the pumps, and sits under a roof along with the heater and filter, separate from the house. I want a wireless control in the house; running wires would be a pain.
The MasterTemp has a connector for "fireman" switch, to shut heat off 15 minutes before shutting off the power to the heater. It also allows a connection to switch between "pool" and "spa" temperature.
Basically, what I think I want is
1 control to turn the heater & heater loop pump on/off, with automatic delay on shutoff with fireman switch
1 control to turn the jets pump on and off (more on this in a later post)
Anti freeze protection: either, automatic based on temp sensor, or timer-based, running both pumps and heater
The units I'm looking at are Pentair SunTouch and Intermatic PE15300F (with P1353ME). In either case, I'd need to add two wireless units, the interface at the control center and the remote in the house. Am I barking up the right trees here? I believe that both units mentioned above support a fireman's switch.
For temperature control, I could use the 3rd relay to switch between "pool" and "spa" on the heater. However, I get the impression from reading an installation manual that I can use a temperature sensor, and set the heater to max, and then control the temp from the remote. The only wrinkle to this is that the pump house is a long way from the spa, with a big retaining wall between. I'm not sure where or how I'd run the temp sensor.
I have an electrician I'd have do the serious wiring, and handle the rest myself, so there's no worry about safety and meeting codes.