Aqua-Hot hydronic heating uses tubing to run hot liquid into heat exchangers that disperse heated air into living areas. An Aqua-Hot heating system makes your RV more comfortable by offering a quiet system that produces even, moist, fume-free heat and continuous, on-demand hot water.
Never be without heat or water
Winterizing the Aqua-Hot system will prevent damage to the domestic hot water loop. This copper tubing must be completely drained of water prior to storing the heater in freezing temperatures.
Monthly maintenance consists of visually checking the coolant levels in the expansion tank.
The 67/33 solution of water and antifreeze should stay at an appropriate level use a refractometer to determine your boiler antifreeze to water ratio.
Engine coolant can be preheated in cold weather by activating the Engine Preheat switch located on the dash panel. This will propel the Engine Preheat circulation pump to move the engine’s coolant through the Aqua-Hot’s engine preheat loop and warm the engine for easy starting. In colder temperatures the engine preheat feature should run for a couple of hours or more. This pump can be left on overnight if it would be beneficial to do so. The Aqua-Hot system will not overheat the engine. However, the Engine Preheat switch should be off when engine preheating is not necessary. When driving the coach, the preheat circulating pump must be off.
Designed specifically for diesel-powered motorhomes, our RV heating systems are diesel-fired which frees you from the hassle of propane.
Our electric RV heating element provides heat in moderate, ambient temperatures. Because our RV heating systems use hot water to provide heat to the interior of your motorhome, independent heating zones achieve uniform interior comfort; you are able to put the heat where you need it only. Therefore, you can maintain the temperature in your bedroom at a comfortable 65º while maintaining your living room at 75º and your bathroom can be 80º.
Hydronic heat means heating with liquid. Operating similar to a thermos, the AquaHot RV heating system holds water, heats it with liquid and keeps it hot for hours. This innovative heating method combines a water heater and furnace into one element, making it easier than ever to tackle the harsh weather conditions of winter camping, or merely take the chill off an early summer morning. The Aqua-Hot heating system is capable of handling all the coach’s heating needs out of one box, including bay heating.
The core of the AquaHot heating system is a sixteen-gallon heat tank which contains a solution of 2 quarts water and 1 quart antifreeze. An internal coil wrapped around the tank heats the domestic water. This tank is thermostatically maintained at approximately 200ºF. The Aqua-Hot system is equipped with a mixer valve to prevent excessively hot water from flowing through the faucets.
When initially running the system, the diesel burner will heat in 10-20 minutes. On start-up, the electric heating element takes about two hours to heat.
Due to its efficiency, the diesel burner is the main heating source of the AquaHot system. A thermostatic switch, set to cycle on and off according to an internal thermostat, controls the diesel burner. The amount of diesel used by the AquaHot system is one to three gallons in a twenty-four hour period. However, a properly operating RV heating system will not continuously burn for that long.
A factory-set internal thermostat controls the electric heating element. Electrical power is about one-tenth the heating capability of the diesel burner and can be used in moderate temperatures when there is a low demand for domestic hot water. Both the diesel burner and the electric heating element can be used at the same time for automatic convenience.
In addition to the diesel burner and electric heating element, a third feature provides engine preheating as a supplemental RV heating source to reduce the operating hours of the diesel burner. While the vehicle is being driven, the engine’s heated coolant automatically passes through an engine preheat loop to transfer heat into the AquaHot heat tank.
A series of plastic piping connected within the coach makes up a zone. Each zone is regulated by a thermistor located within the wall thermostats. The middle zone has a separate wall thermistor. It is by this method that the AquaHot system puts controlled heat inside the coach. When a wall thermostat calls for heat, the chosen zone circulation pumps and the heat exchanger fans are activated. The heat exchanger fans operate on 12-Volts DC. Individual zones can be designated for heat to eliminate hot air from a furnace blasting throughout the entire coach. Heat introduced by the AquaHot system will not dry out the air. Why? Because it does not “super heat” and remove any moisture content the air may have.
The AquaHot system heats fresh domestic hot water automatically. Whenever a hot tap is activated, water is pulled from the coach’s domestic water storage tank and sent to the selected faucet. Since the internal coil surrounds the heat tank, the Aqua-Hot system is continuously heating domestic water on demand. The bay thermostat is set between 45 and 50 degrees Fahrenheit to prevent freezing of the domestic water system located within the coach’s bay area.