How To Replace a summer loop pump in a ITR OASIS Hydronic heater

[Neal]

Seems he's the cause!

 

[Texas Clodhopper]

You know the shop foreman at Ocala Freightliner?

No, I know the shop foreman at Freightliner Gaffney.

 

[J&JD]

Is the ITR or Solar pump better for pumping Kentucky Bourbon?
just trying to keep the thread on track….

 

[Jim]

Is the ITR or Solar pump better for pumping Kentucky Bourbon?
just trying to keep the thread on track….

A voice of reason breaks through! What's up with that????

 

[Texas Clodhopper]

Is the ITR or Solar pump better for pumping Kentucky Bourbon?
just trying to keep the thread on track….

Thats it!! The ITR pump is a food-grade pump.

 

[Jim]

I’m pretty sure that turning on the bypass switch does just that, it bypasses the pump control and turns them all on at the same time. That is why, if you have no or intermittent hot water or heat in one zone, everything seems to work. You could have 2 of the 3 pumps be bad and the system would work with just one pump, just not as efficiently.

After speaking with Randy at ITR, he confirmed that this is the case.

 

[Fish whisperer]

These pumps are no more than over priced aquarium pump, only thing that make them different is there 12 volt. If they really wanted to fix the problem they should sell the impeller. I've owned a aquarium shop for yrs and took one of these pumps apart. The coil hardly ever goes bad, the magnet on the impeller gets weak.

 

[Richpatty]

So my luck finally ran out. My summer pump died yesterday after arriving at a campground…. All three pumps were originals, so I was on borrowed time. But I do not use my rig as much as you guys (we just don’t get out as much as we would like) so that might be part of the reason.

Anyway, I had a spare from ITR from many years ago and it fixed the issue! I have the Oasis NE-S which is a bit different to work on, but probably easier, as all three pumps are right in front of me when I take the main panel off (the unit does not have a separate dist box). See below.

Anyway, I will buy another spare for when the summer pump fails next or if one of the circulating ones die. Looks like I can get one for $279 at heatmyrv.com. Is that a decent price?

 

[Neal]

Looks like I can get one for $279 at heatmyrv.com. Is that a decent price?

No. I think I paid 250/ea from ITR but I'd get the ones from US Solar or wherever it was, discussed on this site, for far cheaper, same pump, despite ITR says it's not.

 

[Neal]

Goody goody goody, I'm on vacation in Hatteras, minimal work, get some air -- NOPE! Hot water is out, fault light, fuse check, replace, blown again. Time for another pump install. After a nap!

 

[Neal]

I have two spare US Solar pumps. I was checking their site and see they have two pumps, one for summer loop, a different one for zone 1/2. First time I've seen them separated. Naturally the ones I have are the zone 1/2 pumps. Any idea what the difference really is? Per a quick google they say it could be alignment of the ports.

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Another source per Chat GPT for OASIS parts is:

ITR Circulation Pump 12 VDC 1/2" Connections, Oasis - 20010Default Title

 

[osuallen]

Only difference I see is one has 2 male connections and the other has a male and female.

 

[Neal]

I know there was talk in this thread about the runtime hours (lifetime) of these pumps. While my RV was in storage I turned OASIS off at the unit itself, obviously off in the coach. I'm not convinced that OFF on the unit powers down the 12V side and the pumps. I need to verify this. It was odd that I turned the main unit OFF and replaced the 10A fuse for the summer loop and fuse blew. If it's OFF, how could it blow the fuse?

 

[Kevin D Pem]

I know there was talk in this thread about the runtime hours (lifetime) of these pumps. While my RV was in storage I turned OASIS off at the unit itself, obviously off in the coach. I'm not convinced that OFF on the unit powers down the 12V side and the pumps. I need to verify this. It was odd that I turned the main unit OFF and replaced the 10A fuse for the summer loop and fuse blew. If it's OFF, how could it blow the fuse?

Neal, I have a question. Have you tested alcalinity of the fluid? Why? Because heating antifreeze degrades the fluid. Corrosion follows. Understanding that the pump is a magnet drive may stop seal problems, doesn't stop impeller sticking in a system. Locked rotor can multiply starting current for the motor. Extended lock rotor can heat a fuse to the point of failure. Sitting unused for extended time could cause the impeller to stick.

 

[DennisT]

Neal, I have a question. Have you tested alcalinity of the fluid? Why? Because heating antifreeze degrades the fluid. Corrosion follows. Understanding that the pump is a magnet drive may stop seal problems, doesn't stop impeller sticking in a system. Locked rotor can multiply starting current for the motor. Extended lock rotor can heat a fuse to the point of failure. Sitting unused for extended time could cause the impeller to stick.

From the Newmar Academy class....

pH of the fluid should be between 7.5 and 10
--If not then it may need changed