I did receive manuals for the AC's, they are AIRXCEL units, the web site on the from cover is
www.rvcomfort.com also
www.rvpsupport@airxcel.com
the model number is 48253C969. You should have received two packets, one for both front and rear. Those packets will have the warranty info along with a card that has the unit model number and serial number. I would check with the dealer or THOR for the info, probably good stuff to have!
Did your unit come equipped with the LINC wireless remote??