Adding oasis transfer fluid?

[Chuggs]

The reservoir only gets doses when expansion takes place. Diluting the fresh fluid placed in the reservoir. Best to take a sample from the radiator cap on the hydronic heating module when it has cooled down to ambient temperature. That fluid runs thru the arteries of the system day in and day out.

 

[Chuggs]

All in all the procedure I posted ealier worked.

I found the hoses to the hydronic unit impossible to remove. I cut the hose just above the barb...and used a razor knife to cut and peel the stuck on hose material to prepare the barb for hose reinstallation. Hose has enough slack to accommodate this if you find it necessary.

I performed two fresh water flushes... the first ran clear for a while...but when blowing out the system with air...more semi-grundgy color appeared...so I flushed again with fresh water and then blew out with air a second time. Much cleaner.

I wound up with probably 3 or 4 gallons of left over fluid... I didn't put all of the third 5 gallon pail in my storage container... so a couple of gallons were pure...and and some left in the recirculation well...it has a tiny bit of discoloration compared to brand new fluid...but it will be plenty to top up the reservoir as needed. Usually go thru some everytime I replace a loop pump.

Tomorrow it's off to the the local hazardous waste place... probably have 22 gallons of spent coolant and water mixed to dispose of. I'll give the hydronic unit a level check again tomorrow when cooled to see if the tank was truly filled. May need a little top up.

 

[Chuggs]

Clear tubing is a must have. It's pretty important to see bubbles and color change when doing the process.

 

[Roadglide117]

ITR told me that color doesn't mean it's old. Color will change with different types of hydronic fluid added.

 

[Roadglide117]

What is the procedure to flush system out?

 

[Chuggs]

ITR told me that color doesn't mean it's old. Color will change with different types of hydronic fluid added.

I have only ever used Century Heat Transfer fluid. There seems to be a lot of leeway in the guidance people have been told. I read that Newmar recommends changing when pH goes below 8.0. ITR has evidently said, 10yrs, pH below 7.0, and hardware is stainless...don't worry.
I'll see how I feel about it in another 10 years. By then I may know people who have kept the same fluid for 20 years without issue.

It was nice to have had the experience. Should I ever need to purge air from the system...I now have the rig and experience.

 

[Chuggs]

What is the procedure to flush system out?

I posted the Instructions on an earlier post. It's a pdf file.

Post in thread 'Adding oasis transfer fluid?' Adding oasis transfer fluid?

 

[Freightrain]

I must be the odd man out here, but I've never had to add fluid in the 9 years I've owned the DS.

You’re not the odd man. I’ve never added any to mine either. 2015 DS 4369

 

[J&JD]

Nor have I. The color has certainly darkened however.

 

[Rich W.]

You’re not the odd man. I’ve never added any to mine either. 2015 DS 4369

Well if it starts cycling off unexpectedly check the tank level first. It doesn’t like a low fluid condition and it’s not a sealed system so the water in the fluid does evaporate which also results in the darkening of the remaining fluid.