According to the manual there should have been two air switch "T" on the in/out water ports. Jayco did not. I am trying to find video of how to winterize my Fogatti tankless WH. Found lots for Furion but not Fogatti.
On the water control : I believe the blue valve is the WH bypass. Can I simply pump antifreeze throug the WH by leaving the blue in normal position and turning the white to "winterize". It this the best way?
You can push RV antifreeze through the water heater. There is not much antifreeze in a tankless unit.
If you had a tank system it would require 6-10 gallons of additional antifreeze.
I am not sure how RV antifreeze handles being heated, so I would ensure not to turn it on until after you flush the system in the spring. Might consider pulling a fuse or a wire to ensure it cannot be accidently turned on in. Just write yourself a reminder note for spring.
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