Atwood Water Heater Aluminum Tubes

[JTR-WO]

I have an Atwood gas/electric Water Heater model CCH6A in my 2016 Via. There are two aluminum tubes sticking out the back that are not connected to anything. Can anyone tell me what they are for?

 

[Our ride]

I have an Atwood gas/electric Water Heater model CCH6A in my 2016 Via. There are two aluminum tubes sticking out the back that are not connected to anything. Can anyone tell me what they are for?

They are used to run engine coolant thru them to heat water in the tank while driving. Therefore having hot water without running propane heater.

 

[Morich]

I think I see a type and that may be keeping you from finding good info on the water heater?
Possible that should be Gch6a rather than CC?

This is a manual that I find handy :

https://techsupport.pdxrvwholesale....2018/09/Atwood-Master-Water-Heater-Manual.pdf

 

[RayIN]

The horizontal pipe in this picture is the Motor Aid feature, some models have that pipe vertical.