with a primary loop formed by a flow path for delivering water from the output of the pump through the heat exchanger and back to the input of the pump and a secondary loop formed by a flow path for delivering coolant from the heat exchanger through a radiator and back to the heat exchanger so that heat is transferred from the water to the coolant via the heat exchanger and from the coolant to air via the radiator application_number US 201213489577 A description referring to fig1 an exemplary sprinkler system 10 with fire pump cooling arrangement is shown system 10 includes a fire pump 12 driven by an electric motor 14 the connection between the two shown schematically at 16 the input side 18 of the fire pump is connected to source water 20 via a valve 22 the output side 24 of the fire pump is connected via a valve 28 to a sprinkler arrangement 26 that may be made up of numerous pipes 30 and numerous associated fire sprinkler nozzles 32 each of which typically has an associated temperature sensitive valve that opens only in the presence of a high temperatures as may be caused by a fire event valves 22 and 28 may be for example manually operated valves that.