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Old 10-01-2014, 03:48 PM   #1
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Hydro hot

on my 2006 alpine coach is has the hydro hot and regular electric water heater. if we use only the regular electric water heater the hot hot water doesent last long at all, cant even finish a shower before the hot hot water runs out. But, if we turn on the hydro hot we never run out of hot water. is this normal?
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Old 10-02-2014, 07:54 AM   #2
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I would say it sounds perfectly normal. That is exactly the way the Oasis hydro units operate and my guess is they all work pretty much the same. The electric just holds a small heat so that you have some hot water while the main unit fires up and gives you all the hot water you can use. Might take maybe 1-2 minutes at most for unlimited continuous hot water.
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Old 10-02-2014, 09:32 AM   #3
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Many people have found Roger Burke's Hydro Hot forum quite informative:

Activity Stream - RV Hydronic Heater Forum
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Old 10-03-2014, 07:29 AM   #4
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I have the Hydro-Hot but the electric heating element heats the HH water. Solution run the diesel for showers.
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Old 10-03-2014, 09:25 AM   #5
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During the warm summer months, we can use our Hydro Hot running on the electric element only to take showers. The trick for us is to not open the shower valve all the way.
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Old 10-04-2014, 10:34 PM   #6
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Hydro Hot - All Owners - Run the diesel burner unit for Hot water at least two hours a month, read the manual. Also to keep the stir pumps working good, run the furnace for a few minutes each month even in the summer, the fluid if not circulated can get thick and the stir pumps might get stuck, since they actually are turned with a magnetic head assembly. If you run the Diesel burner, you can wait 5 minutes and take a shower and have lots of hot water. Its more efficient than a regular water heater running on propane, since diesel has a higher BTU content. If you run it as stated above, you will avoid calling out a repair technician for the most part, machinery needs to run as it's designed, sitting is bad for it.
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Old 10-05-2014, 05:08 AM   #7
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Does the furnace run off propane or the hydro hot?
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Old 10-05-2014, 10:40 PM   #8
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With our 2005 we use the electric for dishes etc., for showers we turn on the diesel about 5 minutes before.
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Old 10-06-2014, 10:20 PM   #9
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It sounds like you have a hydro hot unit and someone also installed a propane heater because the HH unit did not give them enough heat. Take to front cover off the propane heater, provide the brand and let us know, then someone on here can tell you how that works. However, I would search the paperwork in the MH (manuals) and see it the previous owner left the manual, it will tell you how it works. There should also be a manual, on the HH unit, and the type of wall thermostat you have, so those will help you learn how to run the HH unit as well. Now I might be full of hot air, if I still don't understand the issues you are experiencing.
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Old 10-06-2014, 10:36 PM   #10
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Quote:
Originally Posted by dennismhamm View Post
Does the furnace run off propane or the hydro hot?
In most factory installs, the HydroHot is both furnace and hot water heater. Typically diesel/electric although there are some propane/electric but my understanding is that these are usually in 5th wheels where there is no diesel. I have two switches to control the HydroHot. One for electric which I leave on when on shore power or generator. The other is for diesel which I have to turn on for coach heat or for an extended shower. As someone else said, check Roger Burke's forum as he's a wealth of info. Could be something as simple as a mixing valve adjustment.
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