Heating and Cooling
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© 2015 by Roadtrek, Inc.
Alde Engine Coolant Heat Exchanger
The Alde system uses and automatically selects from a variety of heat sources - 120 volt shore power when available, heat
from the Mercedes chassis engine, or propane. When driving or idling the engine, heat is transferred from the engine to the
Alde coolant through a liquid-to-liquid heat exchanger mounted on the firewall of the engine compartment, on the passenger
side. This is "free" heat - your engine is going to produce heat as a natural byproduct of the combustion process, and this
heat is captured by the Alde system instead of being dissipated by the engine's radiator, reducing the need to burn propane
or use shore power. In addition, the heat exchange works both ways - on very cold nights, you can flip the switch on the front
passenger seat pedestal. This will activate a low-power pump that circulates engine coolant past the warm Alde coolant in the
heat exchanger and through the engine coolant passages, ensuring that your engine will start easily even in temperatures
well below freezing. Leave this switch off unless you wish to use the engine pre-heat feature.
Heat exchanger on engine compartment
firewall
Switch for engine preheat
