Systems and methods for delayed fluid recovery

A control system for a heating, ventilation, and/or air conditioning (HVAC) system, wherein the control system comprises:

• a three-way valve configured to actuate to direct refrigerant through a cooling circuit of the HVAC system in a cooling operating mode and through a reheat circuit of the HVAC system in a reheat operating mode;
• a recovery valve configured to actuate to direct refrigerant from the cooling circuit to a recovery circuit of the HVAC system;
• and
• a controller configured to be communicatively coupled to a main controller of the HVAC system and configured to receive control signals from the main controller, wherein the controller is further configured to:
• execute a time delay after sending a first signal to actuate the three-way valve to switch from the cooling operating mode to the reheat operating mode;
• and
• send a second signal to actuate the recovery valve of the HVAC system after execution of the time delay, wherein the controller is external to the main controller.

A heating, ventilation, and/or air conditioning (HVAC) system, comprising:

• a cooling circuit including a condenser, a compressor, an evaporator, and a three-way valve, wherein the HVAC system is configured to circulate refrigerant through the cooling circuit in a cooling operating mode;
• a reheat circuit including a reheat heat exchanger, the compressor, the evaporator, and the three-way valve, wherein the HVAC system is configured to circulate refrigerant through the reheat circuit in a reheat operating mode;
• a first recovery circuit extending between the condenser and the compressor and including a first recovery valve;
• a second recovery circuit extending between the reheat heat exchanger and the compressor and including a second recovery valve;
• a main control system configured to regulate operation of the compressor;
• and
• an external control system communicatively coupled to the main control system, wherein the external control system is configured to send a first signal to the three-way valve to switch the HVAC system from the cooling operating mode to the reheat operating mode and configured to subsequently send a second signal to the first recovery valve to recover refrigerant from the cooling circuit after a time delay calculated based on the first signal to maintain pressure in the condenser during the time delay.