Honeywell T6861 digital thermostats is designed for application of 3-speed fan and valves in fan coil system. It includes 2-pipe-cool only/heat only/manual changeover and 4-pipe-manual or automatic changeover, ventilation mode, manual or automatic 3-speed fan control, water valve control. Fan speed can be selected to automatic or manual 3-speed control mode. In ventilation mode, fan only supports the manual speed control.

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