grldst wrote:
Are you sure about that Doug……I’ve had two motor homes with Aqua hot and neither would heat an RV in 40 degree temps with just the 120 Element. The diesel burner will need to be used at them temps.
1998. I ASSUMED you had the standard Aqua Hot system that has both 120 and Diesel. So, if you do NOT have the 120 option on your webasto system, then you have to use the Diesel burner. In the almost 30 years I have been servicing Aqua Hot type systems, I have never come across a Aqua Hot type system that did NOT have the 120/240 options. BUT, I rarely work on Prevost buses. I have worked on Hi line Monaco Signature motorhomes from the early 90's and up and they while not up to the standard of a Prevost, use 120/240 and Diesel combo systems. BUT, your RV should be able to handle outside temps to HEAT the RV down to about 20 degrees. IF NOT, you either did not operate it correctly or you had malfunctions.The manual states down to 50 degrees for 120 Heat. BUT, I have heated customers coaches down to 25 degrees when in for service on 120 only. The problem with NOT using the diesel option when running the system for heat is, when you use ANY hot water on 120 only the Furnace system shuts down to allow the Water heater function to supply hot water. Hence, you need to leave both the 120 and Diesel burner ON when in temps below 50 degrees. This will allow no disruption of either furnace function or lack of continuous hot water AND enough heat for the furnace system. If you have the larger Aqua Hot (600 series) it has 240 for 2 elements that WILL heat for furnace below 50 degrees. Doug