Programming Thermostat Schedules — Before programming the thermostat, plan the thermostat daily sched- ule. The schedule is divided into 7 days (Monday through Sunday). Each day can have 2 (Occupied 1, Unoccupied), 3 (Occupied 1, Occupied 2, Unoccupied), or 4 (Occupied 1, Occupied 2, Occupied 3, Unoccupied) time periods. Each occupied time period has a start time, stop time, heating set point and a cooling set point. The unoccupied time period has a heating set point and a cooling set point. The unoccupied time period is active whenever an occupied time period is not active. Fill in Table 1 below as an aid to programming the daily schedules.

NOTE: When the sensor detects light (the space is occupied), the thermostat will enter Occupied 1 mode. If the room is dark, the thermostat will follow its programmed schedule. The Occupied 1 schedule should be turned OFF to keep the ther- mostat from entering Occupied 1 while the room is unoccu- pied. If the Occupied 1 schedule is turned ON, the thermostat will enter Occupied 1 per the schedule regardless of light acti- vation. The Occupied 1 set points are used as the heating and cooling set points during light activation. The Unoccupied set points should be used as non-work hour set points (before 8:00 AM and after 5:00 PM) when using light activation. For times when the building is unoccupied during work hours (Monday through Friday, 8:00 AM to 5:00 PM), the Occupied 2 schedule should be turned ON, and can be used for moderate energy savings with set points of 80 F for cooling and 65 F for heating.

PROGRAMMING MODE — To program the daily sched- ules, perform the following procedure:

1.Enter Programming mode by pressing the Program button. The Occupied 1 annunciator will appear on the thermostat display. See Fig. 5. Use the UP ARROW and DOWN ARROW buttons to set the maximum number of Occupied periods available. The thermostat can be set to 1, 2, or 3. After the number of Occupied periods has been selected, press the Mode button.

2.The cooling set point for Occupied 1 will be displayed. Use the UP ARROW and DOWN ARROW buttons to raise or lower the cooling set point until the desired tem- perature is shown. The range of acceptable values is 35 to

99 F (1 to 37 C). Press the Mode button to continue. See Fig. 5.

3.The heating set point for Occupied 1 will be displayed. Use the UP ARROW and DOWN ARROW buttons to raise or lower the heating set point until the desired tem- perature is shown. The range of acceptable values is 35 to 99 F (1 to 37 C). Press the Mode button to continue. See Fig. 5.

Fig. 5 — Setting Occupied 1 Set Points

4.The cooling set point for Unoccupied will be displayed. Use the UP ARROW and DOWN ARROW buttons to raise or lower the cooling set point until the desired tem- perature is shown. The range of acceptable values is 35 to 99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied cooling). Press the Mode button to continue.

5.The heating set point for Unoccupied will be displayed. Use the UP ARROW and DOWN ARROW buttons to raise or lower the heating set point until the desired tem- perature is shown. The range of acceptable values is 35 to 99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied heating). Press the Mode button to continue.

6.The day of the week will be shown. Use the UP ARROW and DOWN ARROW buttons to change the day of the week until the desired starting day is shown. Possible choices are M (Monday) through S (Sunday). Press the Mode button when the desired day is shown.

Table 1 — Daily Schedule Planner

DAY

 

 

 

 

 

SCHEDULE

 

 

 

 

OF THE

 

Occupied 1

 

 

Occupied 2

 

 

Occupied 3

 

Unoccupied

WEEK

Start / Stop / Heat / Cool

Start / Stop / Heat / Cool

 

Start / Stop / Heat / Cool

Heat / Cool

 

 

Monday

/

/

/

/

/

/

 

/

/

/

/

 

 

 

 

 

 

 

 

 

 

 

 

Tuesday

/

/

/

/

/

/

 

/

/

/

/

Wednesday

/

/

/

/

/

/

 

/

/

/

/

 

 

 

 

 

 

 

 

 

 

 

 

Thursday

/

/

/

/

/

/

 

/

/

/

/

 

 

 

 

 

 

 

 

 

 

 

 

Friday

/

/

/

/

/

/

 

/

/

/

/

Saturday

/

/

/

/

/

/

 

/

/

/

/

 

 

 

 

 

 

 

 

 

 

 

 

Sunday

/

/

/

/

/

/

 

/

/

/

/

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: The cooling temperature set point must be higher than the heating temperature set point.

3

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Carrier 50QE900 owner manual Setting Occupied 1 Set Points

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.

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