Abstract: A heating, ventilation, and/or air conditioning (HVAC) system includes a variable-speed fan comprising a first fan blade, a variable frequency drive (VFD) configured to drive the variable-speed fan to rotate the first fan blade at various speeds to deliver a first airflow at variable airflow rates, and a constant-speed fan having a second fan blade. The HVAC system also includes a fan motor of the constant-speed fan configured to rotate the second fan blade at a fixed speed to deliver a second airflow, and a controller configured to determine an operational combination of the variable-speed fan and the constant-speed fan that achieves a target flow rate with a combination of the first airflow and the second airflow without operating the variable-speed fan in a stall region based on stall region data for the variable-speed fan.

Abstract: A multi-circuit refrigeration system includes a first plurality of compressors, a second plurality of compressors, and a control panel. The control panel is configured to receive an input related to humidity from a humidity sensor or humidistat. Based on the input, the control panel is configured to sequence operation of the first plurality of compressors and the second plurality of compressors between a balanced mode and a clustered mode. In the balanced mode, a first compressor of the first plurality of compressors and a first compressor of second plurality of compressors are energized before a second compressor of the first plurality of compressors or a second compressor of the second plurality of compressors is energized. In the clustered mode, the first compressor and the second compressor of the first plurality of compressors are energized before the first compressor or the second compressor of the second plurality of compressors is energized.

Abstract: A multi-circuit refrigeration system includes a first plurality of compressors, a second plurality of compressors, and a control panel. The control panel is configured to receive an input related to humidity from a humidity sensor or humidistat. Based on the input, the control panel is configured to sequence operation of the first plurality of compressors and the second plurality of compressors between a balanced mode and a clustered mode. In the balanced mode, a first compressor of the first plurality of compressors and a first compressor of second plurality of compressors are energized before a second compressor of the first plurality of compressors or a second compressor of the second plurality of compressors is energized. In the clustered mode, the first compressor and the second compressor of the first plurality of compressors are energized before the first compressor or the second compressor of the second plurality of compressors is energized.

Abstract: A multi-circuit refrigeration system includes a first plurality of compressors, a second plurality of compressors, and a control panel. The control panel is configured to receive an input related to humidity from a humidity sensor or humidistat. Based on the input, the control panel is configured to sequence operation of the first plurality of compressors and the second plurality of compressors between a balanced mode and a clustered mode. In the balanced mode, a first compressor of the first plurality of compressors and a first compressor of second plurality of compressors are energized before a second compressor of the first plurality of compressors or a second compressor of the second plurality of compressors is energized. In the clustered mode, the first compressor and the second compressor of the first plurality of compressors are energized before the first compressor or the second compressor of the second plurality of compressors is energized.

Abstract: A multi-circuit refrigeration system includes a first plurality of compressors, a second plurality of compressors, and a control panel. The control panel is configured to receive an input related to humidity from a humidity sensor or humidistat. Based on the input, the control panel is configured to sequence operation of the first plurality of compressors and the second plurality of compressors between a balanced mode and a clustered mode. In the balanced mode, a first compressor of the first plurality of compressors and a first compressor of second plurality of compressors are energized before a second compressor of the first plurality of compressors or a second compressor of the second plurality of compressors is energized. In the clustered mode, the first compressor and the second compressor of the first plurality of compressors are energized before the first compressor or the second compressor of the second plurality of compressors is energized.