Thermostat Front Panel Buttons | Carrier 50QE900 specification

OVERRIDE BUTTON — The Override button is used to force the thermostat from Unoccupied mode into the Occu- pied 1 mode comfort settings. The Override period will be set at 30 minutes. To increase the amount of time in Override mode, press the Override button again. Thirty minutes of over- ride time will be added for each time the Override button is pressed up to a maximum of 4 hours. After the 4-hour limit has been reached, press the Override button again to cancel over- ride mode.

While in Override mode, the Override icon and the Occu- pied 1 icon will be displayed on the thermostat. The time of day and the minutes remaining in Override mode will alternate on the thermostat display.

The set points are adjustable with the UP ARROW and DOWN ARROW keys during Override mode.

NOTE: If the thermostat is in Occupied mode and the Override button is pressed, the thermostat will go into Unoccupied mode immediately. The thermostat will remain in Unoccupied mode until the next Occupied start time.

Thermostat Programming Buttons — The thermo- stat has programming buttons which are used to change the set points of the thermostat, set the modes, and program schedules. The programming buttons are accessible from underneath the thermostat cover. To access the programming buttons, pull on the hinged thermostat cover. See Fig. 3. The programming buttons are: Mode, Fan, Holiday, Program, and Set Clock.

The UP ARROW and DOWN ARROW buttons are used to scroll through programming set points. The buttons are also used to answer yes or no.

KEYPAD LOCK — The thermostat has a keypad lockout feature which will not acknowledge front panel buttons until the lockout sequence is entered. To disable or lock the keypad, press and hold the Mode button. While holding down the Mode button, press the UP and DOWN ARROW buttons simulta- neously. The ‘‘Locked’’ icon will appear on the display.

Fig. 2 — Thermostat Front Panel Buttons

Fig. 3 — Thermostat Programming Buttons

The thermostat is unlocked by performing the same proce- dure. Press and hold the Mode button. While holding down the Mode button, press the Up and Down Arrow buttons simulta- neously. The ‘‘Locked’’ icon will be removed from the display.

FAN BUTTON OPERATION — The Fan button selects fan operation. When the fan is set to FAN ON, the fan will run con- tinuously for improved air circulation.

NOTE: When the thermostat is in Unoccupied mode, the fan will run only during heating or cooling operation, even if the fan is set to FAN ON; this is the energy-saving smart fan feature.

When the fan is not set to FAN ON (no icon displayed on thermostat screen), the fan will run during heating and cooling operation only.

MODE BUTTON OPERATION — The Mode button se- lects the operating mode of the thermostat. If OFF is selected, the thermostat will not enter Heating 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 thermostat will only enter Cooling mode (if the room temperature is above the cooling set point). If AUTO is selected, the thermostat will enter Heating or Cool- ing 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 Occu- pied and Unoccupied schedules stored in its memory.

Auto-Changeover — 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.

HOLIDAY MODE — The Holiday button places the thermo- stat into Holiday mode. During Holiday mode, the unoccupied set points are enforced. The number of days the thermostat will be in Holiday mode can be set.

Set Clock — The Set Clock button allows the user to change the time and day displayed on the thermostat. Press the Set Clock button to enter Set Time mode. See Fig. 4. The cur- rent time will blink on and off. Press the UP ARROW and DOWN ARROW buttons until the correct time is shown. Hold down the buttons to quickly move through the time display. The AM and PM annunciators will automatically change. To scroll through by hours only, press and hold down the Fan button while pressing the UP or DOWN ARROW buttons. To ensure the schedules are properly followed, make sure that AM or PM is correct for the time chosen. When the correct time is shown, press the Mode/Next button to modify the day of the week. The current day will blink on and off. Press the UP ARROW and DOWN ARROW buttons until the correct day is shown. Press the Set Clock button again to exit the Set Time mode.

Fig. 4 — Setting the Clock

50QE900 specifications

The Carrier 50QE900 is an advanced air conditioning unit designed to provide superior climate control for residential and light commercial buildings. This model is a part of Carrier’s renowned range of HVAC solutions, known for efficiency and reliability. With its innovative technology and user-friendly features, the 50QE900 ensures optimal comfort year-round.

One of the standout features of the Carrier 50QE900 is its high efficiency. This unit boasts an impressive SEER (Seasonal Energy Efficiency Ratio) rating, which signifies its energy-saving capabilities. The greater the SEER, the more efficient the unit is at cooling your space while keeping electricity costs low. This model utilizes environmentally friendly refrigerants, aligning with modern sustainability goals.

In terms of design, the Carrier 50QE900 is compact and sleek, making it suitable for various installations without compromising on aesthetics. The robust construction ensures durability, allowing it to withstand varying weather conditions while maintaining consistent performance.

The 50QE900 incorporates advanced technological features that enhance functionality and user experience. It is equipped with a smart thermostat that allows for easy temperature adjustments and scheduling through a mobile app. This connectivity fosters a responsive climate control experience, permitting users to monitor and tweak indoor conditions even when they are away from home.

Furthermore, the unit is also recognized for its quiet operation. With sound-dampening technology, the Carrier 50QE900 minimizes noise levels, creating a peaceful indoor environment. This quality is particularly beneficial for residential applications where noise sensitivity may be a concern.

Maintenance is also simplified with the Carrier 50QE900. The unit features accessible filters and components, making routine upkeep straightforward. Regular maintenance helps ensure that the unit operates efficiently over time, prolonging its lifespan and performance.

In summary, the Carrier 50QE900 combines efficiency, innovative technology, and user-friendly features into a reliable air conditioning solution. With its energy-saving performance, sleek design, and quiet operation, it stands out as a prime choice for those seeking effective climate control in a range of environments. As industries shift towards smarter and more efficient solutions, the Carrier 50QE900 remains a compelling option for modern comfort needs.