So I have a really old 3/4HP Hayward single speed motor. I'm going to replace it with either a 2 speed or a VS. The current setup gets pretty hot and in the middle of the summer, its thermal cut out will trip. There's no doubt that a 2 speed or VS will save me money. Most discussions are always about how long to break even when buying either of the pumps, which isn't that interesting right now. I have some off beat questions that I'd really like help with.
- Is there any reason you can't run a VS pump 24 hours a day? The idea being to set the flow so that it takes that long to turn over the pool volume. Wouldn't this be the cheapest way to run the pump?
- Turning on a motor and most devices is the hardest time (roughly I think) due to current surge. Would running a VS 24 hours a day make it last longer?
- If I get either the 2 speed or VS pump, how do I know when to back flush my DE filter, since the pressure will be half or lower? Would I need to use it at full speed once a week, so I get the normal pressure readings compared to a clean filter?
- Is there a minimum flow rate or pressure I need to have for proper DE filtration?
I bet some folk thought this was just going to be another thread arguing over which pump is better!