System and method for using hot gas re-heat for humidity control

A heating, ventilation and air conditioning (HVAC) system for an interior space, the HVAC system comprising:

• a first refrigerant circuit having a first compressor, a first condenser and a first evaporator;
• a second refrigerant circuit having a second compressor, a second condenser and a second evaporator;
• a hot gas re-heat circuit connected to the first refrigerant circuit, the hot gas re-heat circuit having a re-heat coil positioned adjacent to the first evaporator, and the hot gas re-heat circuit being configured, when enabled, to bypass the first condenser and to permit refrigerant to flow from the first compressor through the reheat coil to the first evaporator;
• and
• a control system to control operation of the first refrigerant circuit, the second refrigerant circuit and the hot gas re-heat circuit, the control system enabling the first refrigerant circuit, the second refrigerant circuit and the hot gas re-heat circuit in response to demands for humidity control and stage one cooling, and the control system enabling the first refrigerant circuit and the second refrigerant circuit and disabling the hot gas re-heat circuit in response to demands for humidity control and stage two cooling.