Section 4 --- Appliances
The Executive 2005
190
AQUA-HOT
Specially designed for use in motorhomes, the Aqua-Hot is an appliance combining a water
heater with a furnace. A 50,000 BTU diesel fired burner and a 1650 Watt AC element work to heat a
50/50 solution of antifreeze to approximately 200º F. The heated antifreeze solution circulates through
heat exchangers located throughout the motorhome to provide interior heat, as well as an almost end-
less supply of hot water. An additional pump circulates engine.
CAUTION:
If not properly and thoroughly rinsed, bleach or other concentrated chlorine bearing
chemicals can cause failure to the copper tubing inside the Aqua-Hot domestic Water
Loop.
The rating for the Aqua-Hot copper tubing is for fresh water and winterizing solutions only.
Periodic flushing with common household chemicals, including bleach, has little or no effect on the
heating system when properly rinsed with fresh water. Failure of copper tubing, especially soft or flexi-
ble copper, may result if materials other than water or winterizing solutions are allowed to reside inside
the piping for extended periods as during storage or other periods of non-use. The most common
cause for failure is due to an extended exposure to chlorine, solutions containing chlorine (i.e. bleach)
or hydrochloric acid.
NOTE:
The Aqua-Hot must be turned ON before using any heat feature.
Diesel Burner:
The diesel burner will consume approximately ½ gallon of diesel fuel for each hour of continuous
burner operation. The diesel burner is rated at 12 Volt DC/ 65 Watts. Circulating pumps rated at 12
Volt DC/ 12 Watts each. The diesel-fired burner has a fast recovery rate. To heat the Aqua-Hot from the
diesel burner, turn the switch to the ON position. The switch will illuminate when the Aqua-Hot is on.
Allow 20 to 30 minutes for the Aqua-Hot to reach operating temperature before operating heat
exchangers or using hot water.
Electric Heat Element:
The electric element works well if plugged into 50 Amp service.
When plugging into less than 50 Amp service, exercise care not to overload
the electric service provided. When the switch is turned on a relay closes
in the 120 Volt AC panel sending power to the electric element in the
Aqua-Hot. The rate of recovery of the electric element is slower than the
diesel burner. Allow two to three hours for the Aqua-Hot to reach oper-
ating temperature when operating from the electric element.
Interior Heat Exchangers:
The heat exchangers are small radiators with 12 Volt DC blower motors. Current consumption is
approximately ½ Amp per large heat exchanger. The small heat exchanger used in the private bath and
the holding tank bay is ¼ Amp.
060177d
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