The current K4s are not safe with wavemakers. I contacted a Koralia rep and this is what he said...
"The Koralia Nano, 1, 2, 3, and 4 are not safe on wavemakers. Only the Magnums 5, 6, 7, and 8 are safe on start stop wavemakers. The magnums are shaftless and ride on bushings which make them silent on start up. They also have a chip inside that regulates their performance. We do make a controllable version of all nine sizes of Koralias, but they only work on our wavemakers."
"The motor is designed for continuous use. The strain of starting and stopping wears out the motor prematurely. The impeller jumps on start up because the motor is AC which means it can start in the wrong direction. When this happens the impeller climbs the shaft and resets itself. This continues to occur until the impeller starts in the correct direction. Some people modify the shaft to prevent the impeller from jumping, but this means the pump will be running backwards at times. There really is not a safe, long-term solution to make the Koralia 4 safe on wavemakers. It is simply not designed to work that way. "
"We will be releasing a new version of the Koralia 4 in late February or March that is designed for wavemaker use, but it is not here yet."
When I asked about using the K4 on a simple timer (one on/off per day), he said it sould be fine. However I opted to run them both 24/7 anyways.
Hope this helps
Joe
