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Carrier 53DFS250-SL Programmable Digital Thermostat Owner’s Manual

to midnight and from midnight to the stop time on  
the same day. For example: 9:00pm start, 8:00am  
stop, on Monday. In this example the program will  
run from 12:00am Monday to 8:00am Monday and  
again from 9:00pm Monday to 12:00pm Monday.  
Programming  
Occupied and Unoccupied Periods  
The copy command becomes available  
after the maximum number of occupied  
periods are programmed in a day. This  
example uses 1 as the maximum occupied  
periods ever programmed in one day.  
• The Unoccupied settings take effect at all times  
when: (1) the program is on and (2) the current time  
is outside a preset occupied period. For this reason  
start and stop times are not necessary for  
unoccupied.  
Tu  
• If the same start and stop times are programmed in  
for an occupied period, then it will run 24 hours.  
Selecting Yes, then pressing Mode will copy the previous day’s program and  
then will ask the same copy question again. If yes is selected each time, this  
routine will repeat until Saturday is copied to Sunday. After Saturday is  
copied to Sunday, the copy command is unavailable.  
• If one occupied period starts and stops within  
another occupied period the lower occupied num-  
ber has priority. For example: If Occupied 3 is pro-  
grammed to be “on” 24 hours, and Occupied 2 is  
programmed to run that day, then Occupied 2 set-  
tings will take over from Occupied 3 between Occu-  
pied 2 start and stop times.  
Tu  
occupied 1  
To program Occupied 2 and Occupied 3 modes  
repeat programming steps for Occupied 1.  
Advanced Setup  
Steps 1 and 2 were performed on page 2. Advanced Setup  
begins with Step 3.  
Start  
occupied 1  
Am  
:
Tu  
Setup  
unoccupied123  
Pm  
:
Stop  
occupied 1  
Tu  
OFF  
Setup  
Setup  
Setup  
Selecting Yes, then pressing Mode will copy the previous day’s program and then will ask  
the same copy question again. If yes is selected each time, this routine will repeat until Sat-  
urday is copied to Sunday. After Saturday is copied to Sunday, the copy command is  
unavailable.  
If no is selected, as in previous steps, flashing prompts for input will appear for start and  
stop times for Occupied 1. If more than one occupied period was selected in Step 1 on  
page 3, then cool/heat set points, and start/stop times for additional occupied periods will  
be prompted.  
Setup  
Locked  
PROGRAMMING NOTES  
Setup  
• If only 1 Occupied period is selected in step 1 on  
page 3, Occupied 2 and 3 programming steps are  
skipped. Further, if only 2 occupied periods are  
selected, Occupied 3 programming steps are  
skipped.  
Locked  
F
Setup  
• Heat and Cool set points for Occupied 1 are the  
same for every day of the week. Heat and Cool set  
points for Occupied 2 and 3 can be adjusted differ-  
ently for each day of the week, if desired.  
Locked  
F
If the start time is set later in the day than the  
stop time, the program will run from the start time  
Page 4  
GeneralDetails
NameCarrier 53DFS250-SL Programmable Digital Thermostat Owner’s Manual
MakeCarrier
LanguageEnglish
FiletypePDF (Download)
File size0.48 MB
Download PDF
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Carrier 53DFS250-SL Programmable Digital Thermostat Owner’s Manual