Thermostat based control system and method for use with water-cooled air conditioning unit to effect automatic reset of refrigerant pressure switches

An electronic thermostat configured to control the operation of a water-cooled aft conditioning unit based on a user selected set point temperature, said electronic thermostat including:

• first and second mode buttons;
• wherein activation of said first mode button causes the thermostat to operate in a Home Mode wherein the user selected set point temperature is maintained based solely on user input;
• and
• wherein activation of said second mode button causes the thermostat to enter an Away Mode wherein factory embedded control logic overrides any user selected set point setting by periodically raising the set point to a higher temperature for a predetermined period of time whereafter the set point k returned to the user-selected set point setting while in said Away mode, whereby raising said set point temperature to said higher temperature setting causes said thermostat to terminate a cooling demand signal such that a predetermined period of time is provided which enables the pressure switch associated with the water-cooled air conditioning unit to automatically reset, wherein said predetermined period of time is at least 10 minutes, and wherein said set point is periodically raised at least once every 4 to 24 hours when in said Away Mode.

An electronic thermostat configured to control the operation of a water-cooled air conditioning unit based on a user selected set point temperature, said electronic thermostat including;

• a housing,
• an electronic display for displaying room temperature,
• at least one set point temperature, and operating mode information;
• a fan control switch, a system mode control switch having three mode settings including a Cooling Mode setting, a Heating Mode setting, and an Off setting;
• a set point raising button and a set point lowering button;
• and
• first and second mode buttons;
• wherein activation of said first mode button causes the thermostat to operate in a Home Mode wherein the user-selected set point temperature is maintained constant;
• and
• wherein activation of said second mode button causes the thermostat operate in an Away Mode wherein factory embedded control logic overrides any user selected set point setting by periodically raising the set point to a higher temperature for a predetermined period of time whereafter the set point is returned to the user-selected set point setting while in said Away mode, whereby raising said set point temperature to said higher temperature setting causes said thermostat to terminate a cooling demand signal such that a predetermined period of time is provided which enables the pressure switch associated with the water-cooled air conditioning unit to automatically reset, wherein said predetermined period of time is at least 10 minutes, and wherein said set point is periodically raised at least once every 4 to 24 hours when in said Away Mode.