Dehumidification control can be activated utilizing a Space Humidity sensor or a Humidistat input. These options are available via Symbio™ 700 configuration. See Appendix B for details. If Space Humidity is used to space humidity levels, dehumidification activates when Space Humidity exceeds the Space Dehumidification Setpoint. If a Humidistat input is used, dehumidification initiates when the Humidistat input becomes active. A Y1 call is not required to initiate dehumidification.
When dehumidification activates, compressors stage to full capacity, and economizer cooling is disabled. The reheat valve will open and modulate to an adjustable Discharge Air Reheat Setpoint (70°F default).
Dehumidification terminates when Space Humidity is less than Space Dehumidification Setpoint minus the Space Dehumidification Setpoint Offset, or when utilizing a Humidistat, the Humidistat input becomes inactive. Dehumidification will also terminate with a Y1+Y2 call (reheat terminates) or with a call for heat.
Access Symbio 700 Controller Application Guide (attached below as ACC-APG002G-EN_07182026.pdf) for more information.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.