Re: Yet another furnace/aqua hot question Reply #25 – January 11, 2017, 12:30:46 pm Hmmm - others smarter than I will chime in - but mixing valve comes to mind. Search the Forum for "mixing Valve" as a first start in this -Roger Berke also has a forum dedicated to hydronic heaters in RV and boats - free to join, and LOTS of info there.RV Hydronic Heater Repair - Homeplease add your coach info to your signature in your Forum user profile so that it is automatically added to every postif you are not handy, search out an approved Shot service center here - or post your current location and maybe a member can suggest someone.http://aquahot.com/Service-Help/Service-Locations.aspx (zoom in on map of US to see useable detail of Aquahot service facilities - note - all are not created equal - some work on the units all the time, some occasionally - all on this list have been to school however.) Quote Selected
Re: Yet another furnace/aqua hot question Reply #26 – January 11, 2017, 12:33:13 pm That is either the tempering (mixing) valve adjustment or thermostat, because both thermostats are not likely to fail at the same time probably the tempering valve. Don't you have an Aqua Hot manual? If not get one, they can be printed online at several sites. Go to reply #10Tim was quicker than me on the triggerAquahot Mixing Valve Quote Selected
Re: Yet another furnace/aqua hot question Reply #27 – January 11, 2017, 07:43:21 pm Relays in the unit can and do fail to turn the power to each circuits pump on and off Quote Selected
Re: Yet another furnace/aqua hot question Reply #28 – January 12, 2017, 12:36:38 am I called Aqua Hot today. I was instructed to go under the coach and check some items. I believe that the mixing valve is the culprit. I can't turn the knob, but I would have to remove the blower unit to get to it anyway. I have called a repair company, but they are out of the rebuild kit ( of course ) and can't get to me until next Tuesday. I watched a really good video on You Tube, about thirty minutes long, which was very helpful in understanding how to replace the nozzle, set the electrodes and clean the combustion chamber. Aside from needing to be a contortionist, and having to get to a nut you can't even see, I am confident that I could do that type of maintenance myself. I just have to locate the filter next. Welcome to the world of MH repair and maintenance. I have so much to more to learn. Thanks again for your help. Quote Selected 1 Likes
Re: Yet another furnace/aqua hot question Reply #29 – January 12, 2017, 01:24:55 am If you want AHot parts, Roger Berke has a great siteRV Hydronic Heater Parts Quote Selected
Re: Yet another furnace/aqua hot question Reply #30 – January 12, 2017, 06:44:55 am Glenn,Without knowing the history of this coach I would add to your cleaning list to acid wash the complete water system with vinegar. You may have calcium build up causing restrictions in your piping. The acid wash may clean out your mixing valve that sounds like it is full of calcium deposits. If the system has been around hard water a long time it may take 24 hrs. or more of soaking to get the system clean.Our system takes about 2 1/2 gal of vinegar to fill our water system, both hot and cold side.Pamela & Mike Quote Selected
Re: Yet another furnace/aqua hot question Reply #31 – January 12, 2017, 10:33:03 am This is the valve you need. If you are a do it yourself person. Quote Selected
Re: Yet another furnace/aqua hot question Reply #32 – January 12, 2017, 11:35:43 am Google, Watts tempering valve, you will find the complete valve and repair kits, the 1/2 INCH AND 3/4 INCH take the same repair kit, I will not quote price's here as I have been called out about it before. Quote Selected
Re: Yet another furnace/aqua hot question Reply #33 – January 12, 2017, 11:55:34 am Quote from: Bill Willett – January 12, 2017, 11:35:43 amGoogle, Watts tempering valve, you will find the complete valve and repair kits, the 1/2 INCH AND 3/4 INCH the 1/2 inch and 3/4 inch take the same repair kit, I will not quote price's here as I have been called out about it before.I bought the complete valve and used the needed parts. See post above, it was cheaper than the parts themselves. Quote Selected
Re: Yet another furnace/aqua hot question Reply #34 – January 12, 2017, 11:56:34 am also, you do not need to replace the valve body - if you buy a valve, you can leave the valve body in place and just "rebuild" the valve from parts that you take out of the new valve, greatly simplifying the job Quote Selected
Re: Yet another furnace/aqua hot question Reply #35 – January 12, 2017, 12:39:57 pm I like the idea of acid wash. How do I go about doing it? Pamela and Mike, I need a little more info. Thanks! Quote Selected
Re: Yet another furnace/aqua hot question Reply #36 – January 13, 2017, 06:47:02 am Glenn,What we do is: We take an old RV water pump and use it to pump in the vinegar through the water fill port. We rigged up a short hose on the suction side of the pump that will fit down in a vinegar jug. On the discharge side we have a short hose that has a male garden hose fitting on the end so you can hook it up to the RV. If you have a hose real you can hook up your pump discharge to that and fill the hose also. Now you don't have to drain the H2O tank to fill your lines just don't open your fill valve. Once you have this set up you will need to get power to run the pump, so we have a jumper wire that will reach the coach batteries. You could get fancy with a dedicated bucket/tank but they take up room to carry around. We use white vinegar from your preferred wholesale club. Our coach takes about 2 1/2 gal.OK once this is set up you will need a second person to help out. While person 1 is outside watching the pump and vinegar jug person 2 will work the spigots inside. When you turn on the pump person 2 will open 1 spigot (like the sink hot) when they smell vinegar close off the hot and open the cold side. This first spigot will take the most vinegar cause you are fill all the piping. Now that the first spigot is full of vinegar move to the bathroom vanity, then the shower, then the throne. Now that your system is full it is a waiting game. We let ours set at least 24 hrs. if not longer (several times we have let is set for 3 or 4 days). What this will do is dissolve the calcium build up that is in your system. Some people will argue that this may cause a leak. Where the truth of the matter is that you had a leak that needed to be addressed but it was stopped up with calcium. We don't fire our A/H unit while the domestic water side is full of vinegar but some do to speed up the process. Others feel it is better to rig up there pump so they can circulate the vinegar through the system and out a drain line into a catch bucket then recirculate the vinegar with the pump you have rigged up. After you have let the vinegar do it's thing you need to flush the system with fresh water and clean out the crud that will be clogging up your kitchen and vanity spigot screen. We travel in areas that have real hard water so we do ours at least every other year even though we always use a water softener for all the water that goes on our coach.You need to check for leaks after you pressure up your system and fix them if found. Better to find it at this time rather than who knows when.I think this is everything that we do to accomplish this task.Pamela & Mike Quote Selected
Re: Yet another furnace/aqua hot question Reply #37 – January 13, 2017, 08:29:13 am If you search for vinegar you'll find lots of input. I use a hand pump kit sold in RV stores for adding winterizing. It fits a gallon vinegar bottle just fine. Quote Selected
Re: Yet another furnace/aqua hot question Reply #38 – January 13, 2017, 07:23:58 pm We had a tankless water heater for the house which needed to have vinegar run through it every year. I bought a pump from Harbor Freight and put it into a bucket with 2 gal. of vinegar. I used two short hoses (washing machine type) to connect to the heater and pump with return going back to the bucket. Instead of letting it sit, the instructions called for circulating it for 45 minutes. It didn't take long for the vinegar to turn black. After I was finished, I dropped the pump into the pool and ran it for a few minutes in order to flush out all the vinegar.My reason for bringing this up is that the following year when I pulled out the pump, I found that the impeller was completely rusted and useless. I would be afraid to try this on the Aqua Hot. Quote Selected
Re: Yet another furnace/aqua hot question Reply #39 – January 13, 2017, 08:12:23 pm There would be no pumps on the Aqua Hot getting the vinegar. Only coolant runs through the pumps. Is there another part of the Aqua Hot you are worried about? Quote Selected
Re: Yet another furnace/aqua hot question Reply #40 – January 13, 2017, 08:52:14 pm It was probably the chlorine in the pool water rather than the vinegar that damaged the pump. Vinegar has long been used to dissolve the build up of calcium and other minerals in coils that are heated.Carter- Quote Selected
Re: Yet another furnace/aqua hot question Reply #41 – January 14, 2017, 11:24:13 pm Where is the fresh water pump located on my 2001 U320 ?It was easy to find in my travel trailer. The procedure to run vinegar through the system sounds a lot like running antifreeze for winterization. I could install a winterizing kit from Camco ! Quote Selected
Re: Yet another furnace/aqua hot question Reply #42 – January 15, 2017, 07:14:27 am Quote from: GleamB – January 14, 2017, 11:24:13 pm1. Where is the fresh water pump located on my 2001 U320 ? 2. The procedure to run vinegar through the system sounds a lot like running antifreeze for winterization. Glenn,1. The pump should be hid in the compartment just in front of the right rear wheel. Said another way last basement door in front of the passengers side rear wheels. You will most likely have to dissemble the shelf unit that has it encapsulated to be able to get to it. 2. Same basic thing. Pamela & Mike Quote Selected
Topic: Yet another furnace/aqua hot question