CPC F25B 47/006 (2013.01) [F24F 3/14 (2013.01); F24F 2003/144 (2013.01); F25B 2339/02 (2013.01); F25B 2347/00 (2013.01); F25B 2600/21 (2013.01); F25B 2700/2117 (2013.01)] | 16 Claims |
1. A method of preventing evaporator coil freeze in a heating, ventilation and air conditioning (HVAC) system, the method comprising, by a controller in the HVAC system, the controller configured for wireless communication and comprising a processor and a memory:
determining, via at least one sensor disposed on an evaporator coil in the HVAC system, a reference saturated suction temperature (SST), wherein determining the reference SST comprises determining a plurality of SSTs via a plurality of sensors disposed on the evaporator coil and determining a minimum SST of the plurality of SSTs, wherein the minimum SST is the reference SST;
determining, by the controller, whether the reference SST is below a minimum SST threshold;
responsive to a determination that the reference SST is below the minimum SST threshold, increasing, by the controller, a discharge air temperature (DAT) setpoint;
determining, by the controller, an adapted setpoint value using the reference SST; and
setting, by the controller, the DAT setpoint to the adapted setpoint value.
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