I have a 2013 Thor Daybreak, on a Ford F53 chassis.I just finished putting in the chassis condenser, I added 4 cans of Freon, 48oz, my pressures are at 20psi low and, 170 high, 70 deg ambient temp. It...
Since there are a lot of variables, just monitor the temp or the pressure and look for a change. As soon as the duct temp starts to rise, stop adding freon.