the heated water exits first heat exchanger 20 at first outlet 42 and is returned to the evaporator circuit of the chiller water loop by return conduit 44 which includes a special non collapsible hose significantly as should be appreciated from the disclosure of jet pump 40 the water flows through first heat exchanger as does the hot refrigerant fluid at a very high rate of speed the refrigerant fluid flows in a first direction away from compressor 50 and the water flows in an opposite direction thus the dwell time for the heat exchange is of short duration but it has been found that the very high temperature of the hot refrigerant raises the temperature of the cold water very rapidly thus heated water returning to the evaporator circuit of a chiller water loop through conduit 44 will pressurize even the largest chiller in less than an hour the earlier techniques require about eight hours to achieve the needed pressurization the heat exchange process that occurs in heat exchanger 20 condenses the refrigerant to return it to its vapor state so that it may be returned to the suction side of compressor 50 the condensed refrigerant exits first heat exchanger 20 at second outlet 46 and is delivered by conduit 48 to the second inlet 52 of second heat exchanger 30.