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Old 11-29-2015, 06:05 PM   #1
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Aqua Hot question

We just went from a 2000 Kountry Star to a 2004 Essex. Ihave a question about Aqua Hot I understand that diesel is the primary source for heating is that correct. This will be our 1st experience with Aqua Hot and we will be headed to Arizona right after Xmas any advice or info would be greatly appreciated
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Old 11-29-2015, 08:03 PM   #2
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The Aqua Hot fired by diesel is usually only one of three heat sources. Hot water/limited heating is also supplied by one or two electric elements in the water jacket of the Aqua Hot boiler. You should also have heat pump heat thru your rooftop units. Hope this helps.
Jim
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Old 11-29-2015, 09:15 PM   #3
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I was in the same boat about a year ago. You will love the AH. If it hasn't been serviced recently, you need to change the nozzle and fuel filter. I keep mine on most of the winter, set to 45 degrees, to keep from winterizing my coach. It's ready to go anytime during the winter. The heat exchanger in the basement will keep anything from freezing down to 0 or below.
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Old 11-29-2015, 09:20 PM   #4
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What model is the AquaHot? That will tell us what electric elements you should have.
Ours is the 600D which has two - 2000 watt elements and 50,000 BTU's of diesel.
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Old 11-30-2015, 05:39 AM   #5
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I think it is a 500 or 550 the fuel filter has just been changed, it does have a 110 switch as well as a hi lo fan switch not sure what that one controls, any idea how much diesel it uses
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Old 11-30-2015, 07:08 AM   #6
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Quote:
Originally Posted by fishn4fun View Post
I think it is a 500 or 550 the fuel filter has just been changed, it does have a 110 switch as well as a hi lo fan switch not sure what that one controls, any idea how much diesel it uses
The nozzle on mine says 0.35 GPH. Of course it does not run continuously under most conditions. They use much less fuel than propane heaters.
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Old 11-30-2015, 07:29 AM   #7
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fish4fun
The procedure is this: Set your comfort stat to call for zone 1, front zone, and temp desired. You should have three rocker switches close by, one for your Aqua Hot, one for the electric element and Hi/Off/Lo fan. Normally push the one for heat (the electric is for standby or low heat load). When your Aqua Hot is up to operating temp, the thermostat will call for circulating pumps to come on according to the zone you have selected. If you need extra heat in the front windshield area (high load area because of the glass) select the high or lo fan switch and it will give extra heating in the front dash area. These are general comments but cover many Newmar models. I usually top off my diesel tanks before parking for a couple of months in the Rio Grande valley in January and February (moderate temps) and can't see that my gas gauge has moved in March when we leave. That includes the use for showers and washing machine/dish washer. I leave the electric element on continuously as it supplies adequate hot water for all uses except that long luxurious shower ( you can run both electric and diesel together for maximum heating) and turn diesel off when not taking long shower. How you operate is a personal choice but the diesel consumption has been reasonable for me. Jim
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Old 11-30-2015, 07:39 AM   #8
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thanks that helps a lot
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Old 11-30-2015, 07:47 AM   #9
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The Aqua Hot is very nice but a bit of a complicated beast. A wonderful and helpful source for info, troubleshooting, parts, etc. is this forum:

RV Hydronic Heater Forum

I would suggest you join.
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Old 11-30-2015, 07:59 AM   #10
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Originally Posted by smlranger View Post
The Aqua Hot is very nice but a bit of a complicated beast. A wonderful and helpful source for info, troubleshooting, parts, etc. is this forum:

RV Hydronic Heater Forum

I would suggest you join.
+1. He can not only answer any questions, but also sell you the parts you need for maintenance or repairs.
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Old 11-30-2015, 08:10 AM   #11
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We also have a 04 Essex with Hydro-Hot system. You will like that it has engine assist which means when traveling down the road the engine is heating the system so when you get to your RV park your water is already hot. You can also travel and use your Hydro-Hot to heat the whole coach and not use the diesel burner or electric heater on the Hydro-Hot. We use the electric heat element for 90% of our hot water needs so when you get to RV site turn on electric element and since water is already hot it will keep it hot. We are able to take to showers back to back and not use diesel burner. You do need to use diesel burner at least once a month to keep it working right. Also need to service once a year which I do myself and replace fuel jet. As others have state great system but can be expensive if needing parts and service.. We bought our coach new and have traveled over 125K miles an do 90% of the service myself.
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