Onan Emerald Plus 5000
Wondering what exactly the bottom switch ( circuit bus 2 H.A.C.R.) in this picture controls? I've had a 2000 Suncruiser for 3 years and this is the way it's been since I bought it. What's it do? ...
Forum Discussion
dougrainer wrote:
BOTH 120 Breakers are supposed to be ON all the time. When you have 30 amp service and a 5kw Genset, that bottom 20 amp breaker is dedicated to the 2nd AC compressor. When on 30 amp shore power, there is a Energy Management system that monitors the AMP draw on Shore Power and if you have available amps will allow BOTH AC compressors to run. Some Model Motorhomes do not have an EMS system, but do have a switch that allows you to turn on the 2nd compressor as they expect you to manage your AC amperage. This type system is usually more than 15 years or older. On RV's(30 amp) that have 2 roof top AC units, the same applies. The 20 amp breaker is dedicated to the Rear AC unit and usually there will be a Front/Rear AC switch inside the RV to switch between the Front and Rear AC when on Shore Power. Doug
If you don't have the owners manual click this link
https://winnebagoind.com/resources/manuals/pdfs/Operator2000/00Suncruiser.pdf
Thanks all for the responses. This makes a lot more sense now. I'm really angry that Itasca didn't put a 50 amp service in this coach. We do have an EMS system that shed's power and anytime we are on shore power and are running the air it sheds once that 2nd compressor kicks in. I'm excited to flip this switch and see what happens when on generator power. I'm guessing we'll have colder air when it's 90* and humid OR we'll find out that the 2nd compressor is frozen!
