FAN COIL THERMOSTAT WITH ACTIVITY SENSING

摘要

Fan coil thermostats can provide energy savings by, for example, not unnecessarily heating and/or cooling an unoccupied room or other space. Fan coil systems employing such a fan coil thermostat may be more energy efficient. A fan coil system may include a fan coil that is configured for fluid communication with a source of heated fluid and/or a source of cooled fluid, a valve that controls fluid flow through the fan coil, a fan that blows air across the fan coil and a fan coil thermostat. The fan coil thermostat may include a controller that implements a control algorithm that may include an unoccupied temperature setting. The controller may be programmed to permit a user to enter a user-chosen temperature setting. In response, the controller may initiate a timer, and may automatically return to the unoccupied temperature setting once the timer has expired.

主权项

1. A fan coil thermostat for use with a fan coil system, the fan coil thermostat comprising:
a housing; a temperature sensor housed by the housing for sensing an ambient temperature; a user interface housed by the housing but accessible by a user from outside of the housing, the user interface comprising:
an LCD display for displaying the ambient temperature sensed by the temperature sensor;an up button;a down button; anda fan button for manually changing a fan speed of the fan coil system; a controller operatively coupled to the user interface and the temperature sensor, the controller implementing a control algorithm that is configured to at least partially control one or more components of the fan coil system in accordance with a temperature control set point, wherein the control algorithm defaults to using an unoccupied set temperature as the temperature control set point; the controller is free from a programmable temperature setback schedule that has a plurality of temperature set points that correspond to particular periods of time during a day and/or week; the controller is configured to receive a user-chosen set temperature when a user operates the up button and/or the down button of the user interface, and once received, the controller is configured to temporarily use the user-chosen set temperature as the temperature control set point rather than the unoccupied set temperature; and wherein after the controller does not detect any button activity of the up button, the down button and the fan button over a predetermined time period, the controller automatically returns to using the unoccupied set temperature as the temperature control set point.