Carrier 53DFS250-HW User manual

Operating Manual
53DFS250-HW Thermostat
R
R
69-2566EFS-05

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Read and save these instructions.
® U.S. Registered Trademark.
US Patent No. 7,114,554; 7,181,317; 7,225,054; 7,274,972; 7,636,604; 7,693,582
Copyright © 2011 Honeywell International Inc. All rights reserved.
This thermostat contains a Lithium battery which may contain Perchlorate material.
Perchlorate Material—special handling may apply,
See www.dtsc.ca.gov/hazardouswaste/perchlorate

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About your new thermostat
This thermostat is ready to go!.................3
Quick reference to controls.......................4
Quick reference to status display .............5
Programming & Operation
Clock setting ..............................................6
System setting ...........................................7
Fan setting..................................................8
Programming Heating and
Cooling Schedule.......................................9
To adjust program schedules..................10
Hold Temperature Until............................11
Override.................................................... 13
Holiday...................................................... 14
Key lock.................................................... 15
Appendicies
Battery replacement ................................18
Advanced functions.................................19
In case of difficulty...................................23
This thermostat is ready to go!
Your new thermostat is pre-
programmed and ready to go.
See page 3 to check settings.
Table of contents
53DFS250-HW Thermostat
CAUTION: EQUIPMENT
DAMAGE HAZARD. To prevent
possible compressor damage, do
not operate cooling system when
outdoor temperature is below 50˚F
(10˚C) unless a low ambient control
kit is installed.

Operating Manual
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About your new thermostat
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Features
• Large, Clear Display with Backlighting—current temperature, set temperature
and time are easy-to-read and all are displayed on the main screen.
• Menu Driven Programming—Provides guidance through the scheduling process,
showing only necessary information and choices on each screen.
• Ability to Select Multiple Days—allows easy customizing for unique schedules.
• Real-Time Clock—keeps time during power failure; automatically updates for
daylight saving time.
• Precise Temperature Control (±1°F)—reliable, consistent comfort.
• Multiple OVERRIDE options—can modify schedule for a specific period of time
(up to 365 days).
• Speedy same-schedule programming—no need to copy mulitple days.
• Programmable or non-programmable modes.
• Remote setback input for occupancy sensors or timeclocks.
• VersaSpeed™ fan ramping algorithm and fan reset algorithm

53DFS250-HW Thermostat
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About your new thermostat
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Your new thermostat is pre-programmed and ready to go. Just set the time and day.
Then check the settings below and change if needed:
1. Set clock........................................................................................................See page 6
2. Select fan setting ........................................................................................See page 7
3. Select system setting .................................................................................See page 8
4. Program schedules: Preset to energy-saving levels
while you’re at work or asleep (assumes you
wake at 6 am, leave at 8 am, return at 6 pm
and go to bed at 10 pm).......................................................................See pages 10-13
This thermostat is ready to go!

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Quick reference to controls
AM
Go Back Next Done
Mon
Tue
Wed
Thu
Fri
Period
Occupied1 Unocc1
Occupied2 Unocc2
DAYS
SELECTED
NEXT STEP KEY
ADVANCES PERIOD,TIME,
HEAT AND COOL TEMPERATURES
SCHEDULE
PERIOD
HEAT OR COOL
TEMPERATURES
GO BACK KEY
GOES BACK TO THE
LAST SCHEDULE STEP DONE KEY
EXITS AND SAVES
CHANGES MADE
TO SCHEDULE
DOWN ARROW
CHANGES TIME
AND
TEMPERATURES
M31449
UP ARROW
CHANGES TIME
AND
TEMPERATURES

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Quick reference to status display
CURRENT DAY
OF WEEK
TEMPERATURE
SETTING
CURRENT
TIME
CURRENT
SYSTEM SETTING CURRENT
FAN SETTING
INDICATES
THERMOSTAT IS
"CALLING FOR
COOL OR HEAT"
System & Fan Override More
Fan Auto
Mon
System Auto Aux Heat On
Occupied
M31450

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System & FanOverrideMore
M31451
Clock Holiday Schedule
Go Back Done
Mon
AM
6:01
To set the current time display, press
MORE, then press CLOCK. Use the arrows
to set the current time
Press DONE to save & exit
Note: The real-time clock should never require
adjustment since it automatically updates for
daylight savings time, and stores all date/time
information.
Note: To change the current week day display,
see page 20.
Clock setting
Press MORE
Press CLOCK
Adjust time, then press DONE

53DFS250-HW Thermostat
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System & FanOverrid
eM
ore
System Fa
nD
one
Fan Auto
System
Heat
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System setting
Follow steps at left to select system:
• Heat: Thermostat controls only the heating
system.
• Cool: Thermostat controls only the cooling
system.
• Auto: Thermostat automatically selects
heating or cooling depending on the indoor
temperature.
• Off: Heat and Cool are off.
• Em Heat (only for heat pumps with auxiliary
heat): Thermostat controls Emergency and
Auxiliary Heat. Compressor is locked out.
Note: The Auto and Em Heat system settings
may not appear, depending on how your
thermostat was installed.
Note: When set to Off, the fan may operate
depending on the fan setting.
Press SYSTEM & FAN
Press SYSTEM to select mode,
then press DONE

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System & FanOverrid
eM
ore
M31453
System Fa
nD
one
System
Heat Fan Auto
Press SYSTEM & FAN, then FAN to select fan
operation, then press DONE.
• On: Fan is always on.
• Auto: Fan runs only when the heating
or cooling system is on.
• LO: low fan speed
• MED: medium fan speed
• HI: high fan speed
Display shows the fan blade symbol
next to FAN when the thermostat has the
fan turned on.
Occupied Mode–Fan control is On. Move
fan to Auto to turn off the fan.
Unoccupied Mode–Fan control is the
same as with the Auto setting, this is true
even when the display indicates “On”.
Fan setting
Press SYSTEM & FAN
Press FAN to select mode, then press DONE