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Topic: AH engine coolant supply/return question (Read 724 times) previous topic - next topic

AH engine coolant supply/return question

We have a 1998 U-320 with an Aqua Hot 431/12.

Question about the Aqua Hot engine coolant supply and return lines.

Ran the coach down the road for 30 minutes.  After stopping I crawled into the bay to check something and noticed the Aqua Hot engine supply and return coolant lines and copper pipes were very hot.  The Aqua Hot system was turned off: not running on diesel, not running on electricity, engine heater turned off.

Is this normal?  I've never paid attention to it before.

When the main engine is running, does coolant always flow through the Aqua Hot system and help provide heat to the system to heat water?

Thank you,
Chris
 

 

Re: AH engine coolant supply/return question

Reply #1 –
Your engine keeps the water hot while traveling.  You turn everything off and you will still have hot water.  You have hot water 3 ways, electric, aqua hot or engine.

John M
John & Carm Morales

"We travel not to go anywhere, but to just go.  We travel for travel's sake.  Our great desire is to move."

Re: AH engine coolant supply/return question

Reply #2 –
John,

Thank you for explaining.

I managed to get in touch Aqua Hot tech support just before they closed for the weekend and they shared that this is normal and is what they call the "engine assist" function.

This setup is still new to me and it was a bit of a surprise.  But at least I know the system is operating as it should!

Chris

Re: AH engine coolant supply/return question

Reply #3 –
Works both ways with the engine heat panel switch on.  Aqua hot heats the motor that way.  Severe winter stuff.

Plus you coach has ether start
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: AH engine coolant supply/return question

Reply #4 –
Yup, working as designed and an awesome feature  ^.^d  !  We never had to run the AquaHot if we had driven the day before.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320
 

Re: AH engine coolant supply/return question

Reply #5 –
And it puts enough heat to keep the coach warn if you are driving in the winter  from just engine heat till you stop and turn on the boiler.
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon