![]() The temperature range is from 60 F (15 C) to 85 F (29 C). The ParkSmart unit controls the temperature in the sleeper area with a sensor mounted in the sleeper control panel. The vehicle’s charging system recharges the batteries when the engine is running. It is NOT designed to, nor will it cool down a hot sleeper while operating in parked mode! In parked mode, the auxiliary unit operates on a dedicated set of AGM batteries separated from the vehicle’s starting batteries by a bi-stable solenoid interconnect controller. The ParkSmart system is designed to maintain an already cooled sleeper area at a comfortable level for a limited amount of time depending on the selected settings and ambient conditions. From 2010-2016, the system was split, and the refrigerant charge could be removed and recharged, oil level adjusted and the refrigerant lines, drier, pressure switch and condenser changed without replacing the components in the bunk area. In the system design from 2007 until July of 2010, the refrigerant, oil and refrigerant charge could not be adjusted, and any problems with components or charge within the refrigerant loop required unit replacement. It is not affected by the front refrigerant system. The ParkSmart unit contains a stand-alone refrigerant loop separate from the main HVAC system. The ParkSmart AGM batteries are connected to the electrical system so they will be recharged by the alternator. ![]() When the engine is running, the air conditioning unit is powered by the vehicle electrical system, and the auxiliary heater core is supplied using engine coolant. It has a 12-volt electric compressor and condenser fan and a fuel operated coolant heater. ![]() ParkSmart works in conjunction with the vehicle’s main HVAC system while the engine is running and independent of the vehicle’s main system when the engine is off. The system functions differently from the standard auxiliary HVAC system. This concept helps to reduce emissions and conserves fuel. The ParkSmart is a battery-powered A/C system, a fuel operated heater and auxiliary control unit, which eliminates the need for the engine to operate when the operator is in parked mode. Since the introduction of the Cascadia platform in 2007, the ParkSmart auxiliary HVAC system has been offered to replace the standard auxiliary HVAC unit.
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