the economizer manifold 57 communicating with separate economizer return lines 61 each having a shut off valve 59 in this embodiment the control 19 has the ability to open the valves 59 and adjust expansion device 56 to control the economizer loop this control strategy is employed in combination with the abovementioned control methodology for operating the valves 32 to utilize either or both of the compressors in addition the bypass or unloader valves 51 provide further ability to reduce the refrigerant flow into the cycle a worker of ordinary skill in the art would recognize the times when a controller would like to utilize each of these options valves 32 51 and 59 may be either shutoff valves or regulating flow control devices allowing for more flexibility in the refrigerant flow control the economizer loop may or may not be engaged to turn off the economizer loop the economizer expansion device 56 may be closed down such that no refrigerant is tapped furthermore to disengage an economizer cycle for each individual compressor a respective valve 59 needs to be closed similarly to turn off the reheat coil 60 which is now positioned downstream of the condenser 36 and utilizes a two phase mixture or liquid refrigerant for the reheat purpose the three way valve 58 may be moved to such a position that no refrigerant is tapped through the reheat coil 38 it.