Winterize with tankless water heater w/antifreeze?

[Alante31V]

Ok, long story short, we have a Christmas trip coming up (OH to FL) and I DON'T want to bypass the tankless water heater when we re-winterize w/rv antifreeze when we head back home. Plan is to re-winterize in GA (mid-stop). Girard says safe/ok w/GSWH-2.

We have the Nautilus P3. Yes, I know, air blowout is best but looking for simple.

Would this setting below work? Direction of the knobs below. The normal "Winterize" setting bypasses tankless.

W-> (right)
B-< (left)
G-< (left)
R-^ (up) (normally goes right if bypassing the tankless)

If reading page 4.

https://www.jaycoowners.com/forums/a...1&d=1591793019

Thanks in advance!

[Kevin Cooper]

With tankless WH, do not bypass when putting in antifreeze. The reason for normally bypassing WH is gallons required to fill it. Get an extra gallon, just incase. The heater will hold about a pint to pint and half.
Enjoy your trip! I’m jealous!

[Paul P.]

The winterize setting on my Nautilus P3 doesn't bypass the Girard water heater and I wouldn't want it to. My Girard has a drain valve under it and I opened it just long enough to verify antifreeze came out. I only use the antifreeze method and have not had any problems after two winters.

[Alante31V]

Thanks, so we think the above setting will work? I’m 99.999% it will.

Saw this post;

https://www.mygrandrv.com/forum/show...Nautilus-Panel)

[Alante31V]

Here I was doubting Jayco and already set to go to tankless.

See pic.

All good! Carry on!