Autopilot Pre-sales Questions

[Psyclone]

I am in the market for a Salt Water Chlorinator and have a few questions about the DIG-220. My choices are narrowed to the Autopilot, Intellichlor and Aqua Rite.

I has been leaning toward the Intellichlor because it seems to be the simplest to install, although the replacement cells are more expensive. That could be an advantage in that any system improvements would be realized without a re-installation. Also when it breaks, you can be pretty sure what you need to replace. I also like the simple interface. I am concerned about the problems with the salt sensor that some have had.

Many on here seem to lean toward the Autopilot. It appears to be a bit more complex to install, but that is probably because the manual leaves some unanswered questions.

1. If I purchase the model with the smaller cell for my 20,000 gal pool, when the cell needs replaced, can I replace it with any of the three sizes? Or does the control box only work with the size it's sold with?

2. What are the dimensions of the control box?

3. Does the contol box need to be protected from the sun and rain?

4. Does the unit wire into an existing time so that it switches on and off in parallel with a single speed pool pump? It appears so by the wiring diagram, but if that is the case, how does the control box clock retain the correct time?