Tinbangertom welcome to the group. Though I saw your other post about having a new 2020 Momentum 29G, it’s helpful to add your RV to your signature so when posting a question readers have some idea of what type of rig you have, or include it in your post. To add it to your signature, click the “My Forums” link in the upper right corner, then on “My Preferences”
As to your question, if you can share a model # and exact name of the system that might help. But if it’s a brand new unit contact your sales person they should be able to get your the operators manual.