Operation

The Mode button selects the operating mode of the ther- mostat. If OFF is selected, the thermostat will not enter Heat- ing or Cooling mode. If HEAT is selected, the thermostat will only enter Heating mode (if the room temperature is below the heating set point). If COOL is selected, the ther- mostat will only enter Cooling mode (if the room tempera- ture is above the cooling set point). If AUTO is selected, the thermostat will enter Heating or Cooling mode based on the room temperature and the heating and cooling set points. If PROGRAM ON is selected, the stored schedule is enabled and the thermostat will follow the Occupied and Unoccu- pied schedules stored in its memory.

Auto-Changeover Ð When the thermostat mode is set to AUTO, the thermostat will provide automatic changeover from Heating to Cooling mode and Cooling to Heating mode when required. The thermostat will automatically switch to maintain the desired temperature setting. The thermostat does not need to be manually changed from heating to cooling or cooling to heating operation.

Two-Stage Operation Ð The second stage of heat or cool is turned on when the ®rst stage has been on for a mini- mum of 2 minutes and the temperature differential from the set point is equal to or greater than the set point plus the deadband plus 2 degrees.

Clock Backup Ð In the event of a power loss, the ther- mostat will keep time for a minimum of 48 hours without external power or batteries.

Fan Operation Ð If Fan On is selected, the fan will run continuously during occupied schedule (except when Mode is switched to OFF). The fan will be off during unoccupied schedule except during heating or cooling operation.

If Fan On is not selected, the fan will only operate during heating or cooling operation.

Emergency Heat Ð Emergency heat is available for heat pump applications. To turn on emergency heat, press and hold the Fan button. While holding the Fan button, press the UP button for 2 seconds. An ``EH'' will be displayed. During emergency heat, the fan will operate and the second stage of heat will be energized (locking out the ®rst stage compres- sor). To exit emergency heat, press and hold the Fan button. While holding the Fan button, press the UP button for 2 sec- onds. During emergency heat, only OFF and HEAT modes are available.

Electric Heat Ð When the Electric Heat option in the advanced set up is set to ON (con®gured by installer), the thermostat will turn on the fan immediately any time there is a heat demand. This feature should only be used on elec- tric heating applications. Do not use with gas heat.

Holiday Mode Ð When the thermostat is in Holiday mode, the thermostat will operate under Unoccupied set points. To con®gure and activate the Holiday mode, press the Holiday button. The ``HOL'' icon will be displayed along with the remaining days of Holiday mode operation. Press the UP or DOWN ARROWS to select the number of days that the holi- day schedule will be in effect. A value of 0 disables Holiday mode. The duration can be set from 1 to 99 days. The ther- mostat will enter Holiday mode on midnight of the next day after the mode has been activated. Holiday mode will re- main in effect until midnight of the last con®gured day.

If the Holiday mode is in effect, the number of days re- maining will blink on and off and the ``Unoccupied'' icon will be displayed. The Override button will be active during Holiday mode. The Dry Contact Switch is ignored.

To turn off the Holiday mode before the remaining con- ®gured days have passed, press the Holiday button to enter into the con®guration mode. Press the DOWN ARROW to set the number of days to zero. Holiday mode will be disabled.

Dry Contact Switch Ð A dry contact switch is pro- vided to allow an external device to force the thermostat into Occupied 1. When the thermostat is forced into Occupied 1 via the dry contact closure, the Occupied 1 icon will blink each second.

SOFT START Ð When multiple thermostats are controlled by the same external device, a Soft Start option can be used to stagger the turn on times of the HVAC equipment. This feature may cause a delay in operation after entering Occupied 1.

Remote Temperature Sensor Ð A remote tempera- ture sensor is available to read the temperature from a space. If a remote temperature sensor is connected, the thermostat will ignore the reading of its internal sensor. When the ther- mostat is using a reading from a remote sensor, the degree symbol above the temperature reading will blink.

33CS250-01 specifications

The Carrier 33CS250-01 is an advanced air conditioning unit designed for residential and light commercial applications. Known for its efficiency and reliability, this model showcases Carrier's commitment to providing quality climate control solutions.

One of the main features of the 33CS250-01 is its high-efficiency performance. With a Seasonal Energy Efficiency Ratio (SEER) rating that meets or exceeds industry standards, this unit is designed to provide significant energy savings. The efficient operation not only helps reduce utility bills but also contributes to a lower environmental impact.

The 33CS250-01 utilizes a scroll compressor, which is known for its durability and quiet operation. This technology allows for a consistent cooling output while operating at reduced noise levels, ensuring a comfortable indoor environment without disruptive sounds. Additionally, the compressor is designed to handle varying load demands effectively, adapting to changes in outdoor temperature conditions.

In terms of construction, the unit features a corrosion-resistant finish, ensuring durability and longevity even in harsh weather conditions. With a robust design, the 33CS250-01 is built to withstand the rigors of daily operation while maintaining its aesthetic appeal.

Another standout characteristic of this model is its user-friendly controls. The unit can be integrated with smart thermostats, allowing homeowners to monitor and manage their indoor climate remotely. This feature not only enhances convenience but also promotes energy efficiency through programmable settings.

The 33CS250-01 is also equipped with a reliable air filtration system, which improves indoor air quality by capturing airborne particles and allergens. This is particularly beneficial for individuals with allergies or respiratory issues, ensuring a healthier living space.

Installation of the 33CS250-01 is straightforward, with compact dimensions that enable it to fit seamlessly in various residential settings. Carrier also offers comprehensive support and warranty options, providing peace of mind to customers after their purchase.

In summary, the Carrier 33CS250-01 is an exemplary air conditioning unit that combines efficiency, durability, and advanced technology. With its high SEER rating, quiet operation, and user-friendly features, it serves as a reliable choice for effective climate control in both homes and light commercial spaces. This model represents the innovative spirit of Carrier, making it a popular option among consumers seeking quality and performance.