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I recently had an MD 715H central vacuum system installed ( 14.9 amp max / 120 volts.)

It is on a dedicated circuit with a normal square D breaker 20 amp breaker. The power unit is in the Garage on a GFCI receptacle.

After a few weeks of being installed, every time I start the unit for the first time after being not used for a couple of days, after about 30 to 90 seconds the 20 amp breaker in the panel trips. Then after resetting the breaker, I could vacuum all day long without any more trouble. I came across a similar post by an user about 9 years back. Not sure if he had this resolved. One of the responses to the post talk about using High-Magnetic Breakers to Power CVSPU’s (Square D (#QO120HM) for a 20 amp circuit ). i don't know if the breaker i have is high magnetic one.

Any thoughts on how to resolve this tripping?

Ramkumar Thirumangalam
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1 Answers1

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It’s either the vac or the breaker. Try swapping with another 20 amp in your panel. Open the main breaker before you remove the panel, and steer clear of the incoming power to the main. If the problem goes away, it’s the breaker. It may function OK with the different load on the other circuit. If it’s flaky in two places, replace it for sure.

MadMonty
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