Fan coil thermostat with activity sensing

A fan coil thermostat for use with a fan coil system that includes a fan coil accommodating fluid flow therethrough and a fan configured to blow air across the fan coil, the fan coil thermostat comprising:

• a user interface comprising a display and one or more temperature set point buttons;
• a memory for storing an unoccupied temperature set point;
• a controller operatively coupled to the memory and the one or more temperature set point buttons, the controller configured to:
• control the fan coil system to control fluid flow through the fan coil, regulate the fan speed, or control fluid flow through the fan coil and regulate the fan speed in accordance with an unoccupied temperature set point;
• accept a temporary temperature set point via the one or more temperature set point buttons, and in response to accepting the temporary temperature set point:
• initiate a timer;
• control the fan coil system to control fluid flow through the fan coil, regulate the fan speed, or control fluid flow through the fan coil and regulate the fan speed in accordance with the temporary set point;
• automatically revert to controlling to the unoccupied temperature set point once the timer expires;
• and restart the timer if another temporary temperature set point is accepted via the one or more temperature set point buttons before the timer expires.

A fan coil thermostat for use with a fan coil system that includes a fan coil accommodating fluid flow therethrough and a fan configured to blow air across the fan coil, the fan coil thermostat comprising:

• a controller implementing a control algorithm that is configured to cause the fan coil system to control fluid flow through the fan coil, regulate the fan speed, or control fluid flow through the fan coil and regulate the fan speed, in accordance with a temperature setting, the control algorithm defaults to controlling to an unoccupied temperature setting;
• a timer controlled by the controller;
• a user interface comprising one or more temperature adjustment buttons for increasing or decreasing a user-chosen temperature setting, the user interface configured to provide a signal to the controller when one or more of the one or more temperature adjustment buttons are operated by a user, the signal providing the controller with the user-chosen temperature setting and also providing the controller with an indication of current occupancy;
• wherein, in response to the indication of current occupancy, the controller is configured to cause the fan coil system to temporarily control fluid flow through the fan coil, regulate the fan speed, or control fluid flow through the fan coil and regulate the fan speed, in accordance with the user-chosen temperature setting rather than the unoccupied temperature setting and to initiate the timer, the controller returning to controlling the unoccupied temperature setting once the timer expires;
• and the controller further configured to restart the timer if a subsequent indication of current occupancy is received after the timer is initiated but before the timer expires.