Several years ago, our old pump died (I don't recall the size - it was new in 1998 - died in 2006). We ran it 24 hr/day from May through Sept. The pool service company suggested we get a larger pump - they installed a 2.4 hp Jacuzzi Magnum with a Centurion motor Model B836 (2 hp, but listed as 2.4 on the housing).
Ever since the new pump was installed, we've had problems with overheating. The longer it runs, the more frequently it shuts down (it automatically turns back on). That is, when we first start it, it will run well for 10-15 minutes. However, after it runs that long, it will start to shut down for 30-60 seconds, then restart itself. After it gets "warmed up" it only runs about 30 seconds before it trips.
The pool people are blaming the electricians, and the electricians have verified correct wiring multiple times. It overheats even if I bypass the sand filter completely, so that tells me the sand is not the problem.
Our pool is roughly 30,000 gallons. There are three intakes from the pool: two skimmers and a drain in the deep end. There are two "inputs" to the pool.
I haven't measured the "head" using pressure gauges, but the pipe lengths from each intake are estimated to be 25ft (deep skimmer), 45 ft (shallow skimmer), and 15 ft (deep drain). The pipes are 1 1/2" PVC. The total pipe length to the two jets is an estimated 60 feet (15 feet to the first, and 45 feet to the second). Would the "head" be the total length of all the intake paths, or an average of the three intake paths, or ??
While I am not a pool expert, the one thing that changed is the size of the motor (and presumably the expected flow rate).
So the question is, if the pump is too large for the size of the intake pipes, could that cause the motor to overheat? If not that, what else? The pool guy said he verified through each line that there were not obstructions in the intake lines.
Pump-less in Omaha.....