Radiator arrangement in a vehicle powered by a combustion engine

A radiator arrangement in a vehicle powered by a combustion engine, the arrangement comprising:

• an AC system having a refrigerant circuit for circulating a refrigerant which gives off or absorbs heat;
• a condenser through which refrigerant is circulated and gives off heat;
• an evaporator through which refrigerant is circulated and absorbs heat, the evaporator is in contact with air close to a cab space in the vehicle;
• a compressor comprises refrigerant in the AC system;
• a line circuit for circulating coolant;
• a coolant circulating pump in the line circuit;
• the line circuit being configured for bringing the coolant into heat-transferring contact with the engine;
• the condenser of the AC system is also in heat-transferring contact with coolant which circulates through the line circuit;
• the radiator arrangement comprises an activation unit which activates the AC system for causing the pump to circulate coolant through the line circuit at times when the engine is not in operation, the activation unit comprises an activation device for activating the radiator arrangement when the engine is not in operation;
• a sensor which monitors a parameter related to the temperature of the engine;
• and
• a control unit configured for receiving information from the activation device and for activating the compressor in the AC system, and the activation device also activating the coolant pump in the line circuit when the activation device has been put into an active position and receives information from the sensor which monitors a parameter related to the temperature of the engine, and the activator device causes circulating of coolant through the line circuit only if the engine is at a lower temperature than a reference value (Tref).