09-02-2016, 04:20 AM
David I can only guess why the unit has a stand alone 12VDC supply as opposed to using the coach supply.
It came from Dometic that way since Dometic made those units for more more than Newell. It was easier to run one set of wires from the thermostat to the control board, than it would be to run wires from the tstat to the board AND run a second set of 12V wires. Plus, when you tap off the coach 12V system you could be getting anywhere from 13.7 to 11 depending on what is going on.
Not defending it or saying it was right or wrong.
It came from Dometic that way since Dometic made those units for more more than Newell. It was easier to run one set of wires from the thermostat to the control board, than it would be to run wires from the tstat to the board AND run a second set of 12V wires. Plus, when you tap off the coach 12V system you could be getting anywhere from 13.7 to 11 depending on what is going on.
Not defending it or saying it was right or wrong.
Richard and Rhonda Entrekin
95 Newell, 390 Ex caretaker
99 Newell, 512 Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home
)