Coleman Mach 15 A/C & Generac NP50-G Genset
I installed a Coleman Mach 15 A/C as a second unit on my motor home. The rear A/C is wired to run from the 20 AMP breaker only from the generator (4800 Watts). The 30 AMP breaker connects to the tra...
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The 20 amp breaker is too small, you need a 30 amp breaker there. The problem is not the 16 amp continuous draw, it is the 2-3 second surge when the compressor restarts. That surge is taking you well over 20 amps, if only for a couple seconds, which is why it initially runs, but then trips on the 2nd or third such surge. Those spec sheets say 16 amps when fan on high, and that is I'm sure accurate. But every motor draws 2-3 times their running power when first starting up. A hard-start capacitor might help, but the issue is the breaker, which might, after all be all that generator can handle on that circuit. Temporarily plug the AC into the 30 amp side, and I'll bet it will run all day without issue.
In addition, you need to make sure you NEVER allow the generator output to cross to the mains. That will cause immediate massive damage to the generator. And that is why you have a transfer switch.
If you hook the AC up to a 15 amp circuit, I doubt it will run even briefly, but will kick the breaker right away.
I note that your wiring diagram is incomplete.
In addition, you need to make sure you NEVER allow the generator output to cross to the mains. That will cause immediate massive damage to the generator. And that is why you have a transfer switch.
If you hook the AC up to a 15 amp circuit, I doubt it will run even briefly, but will kick the breaker right away.
I note that your wiring diagram is incomplete.
